Programa de Pós-graduação em Odontologia

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Análise das propriedades mecânicas, grau de conversão e profundidade de polimerização de resinas compostas polimerizadas com diferentes unidades fotoativadoras de LED
(Universidade Federal de Goiás, 2021-02-24) Almeida, Laís da Mata; Veríssimo, Crisnicaw; http://lattes.cnpq.br/2811678434269373; Veríssimo, Crisnicaw; Lopes, Lawrence Gonzaga; Soares, Carlos José
This study analyzed the irradiance and spectrum by emission spectrophotometry (MARC-RC), characterized the light beams (Beam Profile), as well as determined the Knoop microhardness (KHN), the modulus of elasticity (GPa), the degree of conversion ( %), the flexural strength of 3 points (MPa) and the polymerization depth with elasticity modulus of a composite (Filtek Z350 XT) photopolymerized with 5 different types of LED curing units. Of these, three types were not certified by ANVISA and Inmetro, Dental Wireless (E1), Li A180 (E2) and Lyang Ya (E3), and two with certification, VALO Cordless - Ultradent (VL) and Elipar Deep-Cure L - 3 Oral Care (EL). The characterization was carried out by determining irradiance (mW / cm²), emission spectrum (mW / cm² / nm) and radiant exposure (J / cm²) using the MARC Resin Calibrator (MARC-RC, BlueLight). The Beam Profile of the different photoactivating units was made by means of a laser beam profile reader (Beam Profile). 50 specimens were produced for testing microhardness and modulus of elasticity. Each experimental group was polymerized with a photoactivator unit. Microhardness (KHN) was obtained by averaging five indentations on each surface. The modulus of elasticity was obtained by measuring the major and minor diagonals of each indentation. The degree of conversion was obtained by the FTIR / ATR test with 25 specimens. The 3-point flexural strength test (n = 50) was performed using a load in the center of the sample with a constant speed of 0.5 mm / min until fracture. The maximum load was recorded in Newtons. The depth of polymerization of the restoration was evaluated by Knoop microhardness using the average indentations in the regions: mesial, center and distal of healthy human molars prepared in Class II and restored using an oblique incremental technique. The modulus of elasticity of the polymerization depth of the restoration was obtained in the same way as the previous microhardness test. The test data were subjected to the normality test (Shapiro-wilk) followed by Factor analysis of variance (One-way ANOVA), Two-factor analysis of variance (Two-way ANOVA), Tukey HSD test (α = 0, 05) and multiple linear regression. In all tests, the groups showed statistically significant differences between them (p <0.001). The non-certified units (E1, E2 and E3) presented nonhomogeneous light beam profiles with concentrated irradiance in the center of the active tips. E3 showed greater irradiance when compared to the other photoactivating units. VL and EL showed larger diameters between the different photoactivating units. In the microhardness (KHN) and elastic modulus (GPa) tests, VL presented the highest mean values in both and E1, the lowest mean values. VL showed higher values of degree of conversion (%) when compared to EL and E3. The highest values of flexural strength (MPa) were E3 when compared to the other groups, being statistically similar to the VL and E2 groups. At depths closer to the pulp wall, lower mean values of microhardness and modulus of elasticity were obtained. And, the highest mean values of microhardness and modulus of elasticity were found in the occlusal regions (1mm). The interaction between microhardness and modulus of elasticity showed a very strong and proportional positive correlation according to the different depths tested. The analysis of the tests indicated that between microhardness (KHN) and depth of the restoration, a weak positive correlation was obtained and there was no association with irradiance (mW / cm²). The modulus of elasticity (GPa) was not related to the depth of the restoration and to the irradiance (mW / cm²).
Desempenho biomecânico de novos retentores intrarradiculares em dentes com ou sem férula
(Universidade Federal de Goiás, 2020-02-28) Almeida, Letícia Nunes de; Fonseca, Rodrigo Borges; http://lattes.cnpq.br/8629552867290605; Fonseca, Rodrigo Borges; Lopes, Lawrence Gonzaga; Barata, Terezinha de Jesus Esteves; Kasuya, Amanda Vessoni Barbosa; Favarão, Isabella Negro
The aim of this study was to evaluate the influence of intrarradicular post system and the amount of coronary remnant (ferrule) on maximal fracture load, fracture pattern and stress distribution of endodontically treated teeth. Eight experimental groups were created: Pf-0 e Pf-2 - glass fiber post (GFP) no. 3 in teeth with and without ferrule respectively; GFP no. 1 relined with experimental composite (EC) with and without ferrule respectively; EC-0 and EC-2 - custom post made with the experimental composite (EC) with and without ferrule respectively, CAD-0 e CAD-2 - custom milled post with and without ferrule respectively. The EC was composed of 22.5 wt% of methacrylate resin (Bis-GMA, TEGDMA, Bis-EMA), 30% of glass fibers and 47.5% of filler particles. After endodontic treatment, post cementation and crowns with composite resin, the teeth were tested to verify the maximum fracture load (n = 10) in a universal testing machine (Instron 5965) a 0.5 mm/min. Subsequently, the fracture pattern was analyzed and stress distribution was evaluated by the finite element method using the modified von Mises criterion (MSC Marc & Mentat). The maximum fracture load results were subjected to factor analysis, and subsequently Kolmogorov-Smirnov, ANOVA, Tukey and T-Test for comparison between groups (α = 0.05). Interaction was observed between the factors under study (p = 0.046), and ANOVA and Tukey showed a statistically significant difference between the groups (p = 0.001). EC-0 (752.81N) and CAD-0 (728.84N) were similar and superior Pr-0 (545.16) and Pf-0 (498.01N). In ferrule groups, all retainers were similar (p>0.05) Pf-2 (791.85), Pr-2 (699.1), EC-2 (822,81), CAD-2 (779.89). Pf-0 showed a greater number of non-repairable failures and the Pr-2 posts promoted a greater number of favorable failures. Groups without ferrule showed higher number of non-repairable failures. The posts made with EC showed lower stress concentration and the posts made by CAD / CAM technique, the highest stress concentration. Retainer type and presence of ferrule influence on maximal load, fracture pattern and stress distribution of endodontically treated teeth. CE custom posts promote higher maximum fracture load and more favorable stress distribution.
Ansiedade e problema de manejo de comportamento após tratamento odontológico na primeira infância: revisão de escopo
(Universidade Federal de Goiás, 2024-09-02) Alves, Thais Cristina de Souza; Costa, Luciane Ribeiro Rezende Sucasas da; http://lattes.cnpq.br/9906371509661305; Faria, Patricia Correa De; Antunes, Denise Espindola; Costa, Luciane Ribeiro De Rezende Sucasas Da
Introduction: Dental fear/anxiety (DFA) and dental behavior management problems (DBMP) in dental care are common during procedures performed in early childhood. This relationship between them has been observed in primary studies, that have specifically evaluated the effect of behavior management techniques and/or specific procedures in reducing DFA and DBMP in children under the age of six. Little is known about the impact of early childhood dental experience on DFA and DBMP in older children. Objective: The objective of this scoping review was to map and synthesize the evidence on the impact of early childhood dental treatment DFA and DBMP throughout childhood. Methods: The search for articles was carried out in the electronic databases APA PsycNet, Cochrane, Embase, LILACS, PubMed, Scopus and Google Scholar. For the search, terms related to preschool children, DFA, DBMP, caries, follow-up were combined. There were no restrictions on the language of publication or date of publication. Clinical trials and longitudinal observational studies carried out with children aged between two and six years at baseline were included. Narrative and systematic reviews, cross-sectional studies, case-controls, case reports and series, clinical trial protocols, abstracts in conference proceedings, editorials and opinion pieces were excluded. The process of selecting studies and extracting information was carried out by two researchers. Information on the treatments carried out, management techniques and follow-up time was extracted from the studies and summarized in a chart and text. Results: Out of a total of 742 studies identified, nine were included, of which five were randomized clinical trials, one was a non-randomized clinical trial and three were prospective longitudinal studies. The change in DFA level after dental care in early childhood was measured in six studies. In three there was an improvement. In the others, the DFA level worsened (n=2) or there was no change (n=1). In the other studies, DBMP was measured in isolation or in conjunction with DFA. Of the three, two showed an improvement in behavior. Follow-up times ranged from seven days to 30 months. Conclusion: From the studies selected, it was noted that there is no consensus on the effect of dental treatment carried out in early childhood on DFA and DBMP at future visits. The number of studies is limited, and the methods and results are heterogeneous.
Incidência de complicações protéticas associadas a três tipos de tratamento com implantes para o edentulismo mandibular: estudo de coorte com três anos de acompanhamento
(Universidade Federal de Goiás, 2021-09-24) Araújo, Sara Cristina de; Leles, Cláudio Rodrigues; http://lattes.cnpq.br/6740286066154410; Leles, Cláudio Rodrigues; Bernardino, Ítalo de Macedo; Hartmann, Roberto; Costa, Nádia do Lago; Jordão, Lídia Moraes Ribeiro
Objectives: This prospective cohort evaluated the incidence of prosthetic complications, number and reasons for post-insertion visits during a three-year follow-up period of fully edentulous patients rehabilitated with complete maxillary dentures opposed to a mandibular overdenture retained by one or two implants, or a fixed hybrid prosthesis retained by four implants. Materials and Methods: Participants were individuals who participated in a randomized clinical trial comprising three treatment groups: Group I: overdenture retained by one implant (n=11); Group II: overdenture retained by 2 implants (n=13); and Group III: fixed prosthesis retained by 4 implants (n=13). A total of 37 patients were followed-up for a period of 3 years after insertion of the implant-assisted prostheses. Data were collected prospectively concerning the occurrence of prosthetic complications, number of scheduled or unscheduled visits, clinical duration of the appointments for clinical resolution of prosthetic complications. Results: The total number of unscheduled visits per patient ranged from 0 to 7 (mean = 2.41; SD = 2.2) throughout the 3-year follow-up period. No differences were found between the three groups regarding the number of patients who required unscheduled visits. The clinical time of appointments (scheduled and unscheduled) was longer for the G-III (p <0.001) when compared to the overdenture groups. The incidences of prosthetic complications for the overdenture groups (G-I and G-II) were higher compared to G- III (p<0.001). Most of the complications that occurred in G-I and G-II were matrix replacement due to loss of retention of mandibular overdenture due to wear of the retentive inserts (38.3% of patients/year). Fracture of artificial teeth was the most common complication in G III (30.8%). On the other hand, as fixed prostheses, they spend more clinical time to solve their complications. Conclusion: All the three treatment options required maintenance recall visits to ensure their function and longevity. Overdentures had a higher incidence of prosthetic events compared to fixed mandibular prostheses. On the other hand, fixed prostheses require more clinical time to solve their complications.
Interferência de resinas compostas no resultado da saturação de oxigênio do oxímetro de pulso
(Universidade Federal de Goiás, 2020-02-28) Barbosa, Higor de Almeida; Alencar, Ana Helena Gonçalves de; http://lattes.cnpq.br/2039898015468283; Silva, Júlio Almeida; http://lattes.cnpq.br/1022830186974104; Silva, Júlio Almeida; Siqueira, Patrícia Correia de; Decurcio, Daniel de Almeida
To evaluate the interference of different thicknesses of composite resins in the result of oxygen saturation on the finger, by means of the pulse oximeter, in the presence and absence of ambient light. Method: To obtain the sample of this study, silicone matrices were made in dimensions 17mm x 7.5mm in thicknesses of 2.0mm, 3.0mm and 4.0mm. Ten samples of each thickness were produced with the following materials: G1. Harmonize® Dentin A2 composite resin; G2. Herculite® Classic Dentin A2 composite resin. The sample was positioned in a device specially developed for the alignment between the pulse oximeter sensors and maintaining the sensor-sample-pinky position. The measurement of oxygen saturation and beats was performed in a voluntary participant with the aid of the portable pediatric pulse oximeter BCI model 3301, in the presence and absence of ambient light. The positive control consisted of the measurement of the oxygen saturation level of the little finger, and the negative, of the measurement with the interposition of a silver amalgam sample. The variables were described by means and standard deviations and the non-parametric Mann-Whitney test was used for comparisons between experimental groups and positive control. The level of significance was 5% for the established comparisons. Results: The average rate of oxygen saturation and pulse on the volunteer's finger was 97% and 67 bpm, respectively. There was no significant difference between the means of oxygen saturation in the Harnonize® resin group in thicknesses of 2mm (98.10%), 3mm (97.55%) and 4mm (97.80%) and that of the positive control of this group (97.40%), as well as between the averages of Herculite® resin in 2mm (97.90%), 3mm (97.15%) and 4mm (97.00%) and that of the positive control of the group (96, 70%), in the presence of ambient light. As for the presence and absence of ambient light, there was no statistically significant difference between the means of oxygen saturation both when comparing the two groups of composite resin evaluated separately (n = 30) and when comparing the total sample (n = 60). In the negative control group, no oxygen and pulse saturation results were obtained. Conclusion: The Herculite® and Harmonize® composite resins, in different thicknesses, did not interfere with the reading of oxygen saturation and pulse rates of the pulse oximeter apparatus, both in the presence and in the absence of ambient light
Correlação entre cor da coroa dentária e a saturação de oxigênio em dentes submetidos a procedimentos clareadores
(Universidade Federal de Goiás, 2021-03-26) Carvalho, Igor César Ribeiro de; Alencar, Ana Helena Gonçalves de; http://lattes.cnpq.br/2039898015468283; Estrela, Carlos; http://lattes.cnpq.br/3611967334176683; Estrela, Carlos; Barletta, Fernando Branco; Silva, Júlio Almeida
Objective: To evaluate the correlation between the color of the dental crown and the result of the pulse oximeter in healthy teeth before and after bleaching procedures. Materials and methods: According to the sample calculation, it would be possible with 62 teeth to detect as statistically significant correlation coefficients between the color of the dental crown and the result of the pulse oximeter, with moderate magnitude (r = 0.40) considering a power of 90%. This is a clinical trial with a sample consisting of 70 participants. The color of the dental crown of 70 healthy upper central incisors was assessed using a spectrophotometer and the oxygen saturation level of the pulp was recorded using a pulse oximeter. Both measurements were made before and 30 days after the completion of the bleaching procedures. The bleaching was performed by the combined technique, with the application of the 35% hydrogen peroxide whitening gel, in the office stage, and with 10% carbamide peroxide, in the home stage, for 16 days. The influence of each coordinate on the color difference of the dental crown was analyzed according to ABNT (2004). The symmetry of the variables was verified by the Kolmogorov Smirnov test, and the quantitative variables were described by means and standard deviations. The correlation between quantitative variables was established using Pearson's correlation coefficient. The level of significance considered was 5%. Results: A statistically significant change was observed between values recorded by the pulse oximeter before (85.0% ± 4.1) and after 30 days after the completion of the bleaching procedures (86.4% ± 2.3), as well as between the values of the color coordinates initially detected (L * = 89.0 ± 2.8; a * = -1.7 ± 0.7; b * = 20.7 ± 3.2) and 30 days after the tooth whitening (L * = 91.2 ± 2.6; a * = - 3.0 ± 0.6; b * = 13.5 ± 2.5). 30 days after the completion of the bleaching procedures, the dental crowns were clearer with a difference between L * s equal to 1.4, more greenish with a difference between a * s equal to 1.3, and more bluish, with a difference between b * s equal -7.2. There was no correlation between the values of the coordinates L *, a * and b * and the results recorded by the pulse oximeter in the initial period, r = -0.22, r = 0.02, r = 0.11, respectively, nor after 30 days after the completion of the bleaching procedures, r = -0.20, r = 0.01, and r = -0.12, respectively. Conclusion: Changes in the pulse oximeter records do not correlate with the color change of the dental crown promoted by bleaching procedures.
Análise da hibridização dentinária na alteração cromática coronária frente ao uso de cimentos obturadores do canal radicular e cimento portland
(Universidade Federal de Goiás, 2021-02-22) Chaves, Lucas Silva; Estrela, Carlos; http://lattes.cnpq.br/3611967334176683; Estrela, Carlos; Decurcio, Daniel de Almeida; Guedes, Orlando Aguirre
Objective: This study evaluated the influence of dentin hybridization in the coronary chromatic alteration of bovine teeth when using different endodontic cements based on calcium silicate and Portland cement. Material and method: 200 bovine central incisors were divided into two groups: G1 with the presence of dentin hybridization and G2 without the presence of dentin hybridization. The teeth were subjected to colorimetric analysis using the Easyshade spectrophotometer at four different times: determining the color of the dental substrate before root canal filling; seven days after root canal filling, sixty days after root canal filling and one hundred eighty days after root canal filling. The data were tabulated and evaluated for normality and homogeneity by the Shapiro-Wilk and Levene tests, respectively. Two-way analysis of variance was performed, with Sidak's post-test for multiple comparisons, with a significance level of 5% (α = 0.05). Results: Dentin hybridization influenced the coronary chromatic alteration of Sealapex cement after 7 days and in Bio-C Sealer and AH Plus cements after 60 days, but all endodontic cements caused clinically noticeable chromatic changes after 7 days, 60 days and 180 days, independent of hybridization. After 7 days, the AH Plus endodontic cement obtained the highest ΔE * when hybridized and the Endofill endodontic cement obtained the highest ΔE * when not hybridized. After 60 days, the AH Plus endodontic cement obtained the highest ΔE * when hybridized and non-hybridized. After 180 days, Sealapex endodontic cement obtained the highest ΔE * when hybridized and AH Plus endodontic cement obtained the highest ΔE * when not hybridized. Conclusion: All endodontic cements caused clinically perceptible chromatic changes in the endodontically treated teeth after 7 days, 60 days and 180 days, regardless of dentin hybridization. The studied endodontic cements behaved in different ways regarding a coronary chromatic alteration, being difficult to predict a unique behavior.
Efeito do gás ozônio em dentina exposta a biofilme de S.mutans
(Universidade Federal de Goiás, 2011-12-20) Chaves, Rafaella Mosquera; Estrela, Carlos; http://lattes.cnpq.br/3611967334176683; Lopes, Lawrence Gonzaga; http://lattes.cnpq.br/8698234314492960; Lopes, Lawrence Gonzaga; Estrela, Carlos; Cardoso, Paula de Carvalho; Pereira, Lúcia Coelho Garcia
The present study aims to assess the affect of ozone gas in dentin exposed to biofilm of Streptococcus mutans by the evaluation of mineral content (Log Ca/P) of dental substrate using the tool Spectroscopy Dispersive Energy-EDS. Five human third molars were sectioned in to four slices of dentin and divided into four groups: Group I, control (no treatment); Group II, ozone therapy; Group III, biofilm development; and Group IV, ozone therapy followed by biofilm development. The mineral content (Log Ca/P) was evaluated by EDS. The data were tabulated and assessed by repeated measure one-way analysis of variance (ANOVA) and the Tukey test (p<0.05). The Group I-Control was similar to the Group II-Ozone and was statistically different from Group III-Biofilm and Group IV-Ozone+Biofilm. The lowest Log Ca/P was determined in Biofilm Group. Our findings show that the application of gas ozone didn’t confer preventive effect on the dentin surface under the challenge of oral biofilm.
Influência do voxel e da miliamperagem na qualidade da imagem e dose de radiação em tomografia computadorizada por feixe cônico
(Universidade Federal de Goiás, 2022-02-25) Correia, Fernanda Ferreira Nunes; Silva, Fernanda Paula Yamamoto; http://lattes.cnpq.br/0511229119340734; Silva, Fernanda Paula Yamamoto; Silva, Jonas Oliveira da; Silva, Maria Alves Garcia Santos
The diagnostic accuracy in cone beam computed tomography (CBCT) must be maintained with the lowest possible radiation dose, therefore, the protocol must be optimized according to the clinical indication, in terms of technical parameters, following the acronym ALADA, as low as diagnostically acceptable. This study aimed to evaluate the influence of technical parameters - voxel, tube current, exposure time and number of base images - in the Ortopantomograph™ OP300 equipment (Instrumentarium Dental™, Charlotte, NC, USA) on image quality and radiation dose in CBCT from nine image acquisition protocols. For this, 19 thermoluminescent dosimeters were used, for each of the protocols, located in radiosensitive regions, according to the recommendations of the International Commission on Radiological Protection (ICRP), positioned in an Alderson RANDO® anthropomorphic phantom for later calculation of the equivalent and effective doses. The subjective assessment of image quality was performed through the analysis of CBCT exams by 3 specialists in Dental Radiology and Imaging, independent from each other, who identified anatomical structures, for each protocol, in a macerated mandible. Descriptive analysis of radiation dose and multiple linear regression were performed to assess the influence of parameters on radiation dose [F (2,6) = 17,294; p = 0,003; R² = 0,852] with emphasis on milliamperage and number of base images, described in the equation: y = - 114,382 + 17,910 (milliamperage) + 0,196 (base images). Intra- and inter-observer reliability of subjective assessments were calculated as a kappa agreement analysis. Fisher's exact test showed no association between image quality and acquisition protocols (x²(8) = 6.685; p = 0.622). The chi-square test of independence showed that there is no association between the examiners' confidence and the acquisition protocols (x²(8) = 13.767; p = 0.090). A statistical significance level of p<0.05 was used. With the manipulation of the technical parameters for the evaluated protocols, a variation of up to 225.6% in the effective dose was observed. Protocol 1 (FOV 6x8 cm, 90 kV, voxel 0.3 mm, 8 mA, 4.9 s and 486 base images) was considered superior to the others in terms of subjective assessment of image quality and radiation dose.
Prevalência de dentes pilares de prótese fixa em subpopulação adulta brasileira
(Universidade Federal de Goiás, 2012-03-09) Crosara, Mariana Borges; Souza, João Batista de; http://lattes.cnpq.br/0642108682158061; Estrela, Carlos; http://lattes.cnpq.br/3611967334176683; Estrela, Carlos; Alencar, Ana Helena Gonçalves de; Rocha, Sicknan Soares da; Barletta, Fernando Branco
Objective: The purpose of this cross-sectional study was to evaluate the prevalence of pillar teeth for fixed prostheses in a subpopulation of adult Brazilians. Methods: Panoramic radiographs of a total of 1401 patients, performed between August 2002 and September 2007, were randomly selected from the database of the Radiological Center of Orofacial Images of Cuiabá (CROIF, Cuiabá, MT, Brasil). A total of 1401 radiographs were examined to determine the frequency of pillar teeth for fixed prostheses. The data were collected and tabulated, regarding age, gender and dental group. The statistical treatment analyzed the data about the frequency distribution and chi-square test. The significance level was set at α = 5%. Results: We evaluated 29,467 teeth, and of these, 4,967 (16.8%) were pillars of fixed prosthesis. High prevalence of pillar teeth for fixed prosthesis was observed in female subjects (61.2%) and aged between 46-60 years (49.9%). Upper and lower premolars were the teeth more often involved in rehabilitation, 20.5% and 17.2%, respectively. Dental absences were identified in 24.8% of the sample. Conclusion: The prevalence of pillar teeth associated with fixed prosthesis was 16.8%, being more frequent in upper incisors and premolars of female subjects.
Sobrevida e desfechos periimplantares de overdentures mandibulares retidas por quatro mini implantes de titânio-zircônia: ensaio clínico randomizado de um ano de acompanhamento
(Universidade Federal de Goiás, 2023-02-15) Curado, Thalita Fernandes Fleury; Leles, Cláudio Rodrigues; http://lattes.cnpq.br/6740286066154410; Leles, Cláudio Rodrigues; Oliveira, Camila Alves Costa de; Mello, Caroline Cantieri de
Mandibular overdenture is considered the standard treatment for completely edentulous patients, with excellent cost-effectiveness and high success rates. The traditional technique consists of installing two implants of conventional diameter, its use being limited in very resorbed ridges with reduced thickness. Mini-implants are small-diameter implants that have recently been used to retain overdentures with satisfactory success rates. The aim of this study is to evaluate the survival and peri-implant outcomes of a mini-implant system for overdenture retention and the influence of surgical and loading protocols performed. The present study consists of a 2x2 factorial randomized clinical trial where 74 total edentulous participants underwent the installation of four mini-implants for overdenture retention in the mandibular interforaminal region, totaling 296 mini-implants. They were randomized into four groups according to the surgical protocol and prosthesis loading: Immediate/Flapless = 17 (23.0%); Immediate/Flapped = 18 (24.3%); Delayed/Flapless = 20 (27.0%); and Delayed/Flapped = 19 (25.7%). Most participants (64.9%) were female and the mean age at surgery was 64.1 ± 8 years. The survival rate during the 1-year follow-up was 100%. No major biological complications were observed, such as abnormal marginal bone loss or sulcus depth. The plaque index remained stable at the follow-ups (3, 6 and 12 months after capture) while the bleeding index significantly reduced at the 6 and 12 months follow-ups compared to the baseline index (3 months). Probing depth and gingival margin height remained stable over the follow-up periods. The mean overall marginal bone loss was 0.68 (±0.68) mm after three months and 0.89 (±0.75) mm after one year. The flapless protocol showed better results in stability and soft tissue health and a slightly higher risk of marginal bone loss. The findings suggest that the mandibular overdenture retained by this new mini-implant system is a safe and predictable treatment option with regard to implant survival and peri-implant outcomes, even when flapless surgery and immediate loading are adopted.
Influência do nível de experiência do operador na precisão do acesso endodôntico guiado em dentes com canais calcificados: uma revisão de escopo
(Universidade Federal de Goiás, 2024-10-31) Deus, Lara Borges de; Silva, Julio Almeida; http://lattes.cnpq.br/1022830186974104; Decurcio, Daniel de Almeida; http://lattes.cnpq.br/4640062828556657; Decurcio, Daniel de Almeida; Silva, Julio Almeida; González, Álvaro Cruz; Siqueira, Patrícia Correia de
Introduction: Performing conventional endodontic access in teeth with root canal calcification is challenging due to the difficulty in locating and accessing the root canals. This approach can be time-consuming and may pose risks of excessive loss of dental structure, deviations, and even perforations. Guided endodontics emerges as an alternative technique that can facilitate access to the root canal system in teeth with calcifications. Objective: This scoping review aimed to assess the influence of the operator's level of experience on the accuracy of guided endodontic access in teeth with calcified canals. Methodology: The review involved searches in eight electronic databases until August 04, 2024, resulting in the initial identification of 999 records. After removing duplicates and selecting based on titles and abstracts, 31 articles were selected for full-text reading and analysis against the eligibility criteria. Included studies were published between 2019 and 2024 and addressed the influence of operator experience on guided endodontic access. Study evaluation included extracting the following data: study characteristics, objectives, employed methodologies, degree of tooth calcification, operator experience, planning and fabrication of access guides via 3D printing, and instruments used for access. Results: Analysis of the studies revealed significant heterogeneity regarding the models of guides used for guided endodontic access, operator experience, and evaluated parameters (deviation, canal location, wear, and time spent for guided access). However, despite this variability, none of the studies demonstrated a significant influence of operator experience on the accuracy of access guides in teeth with calcified canals. Conclusion: The guided endodontic technique can be a precise and predictable option regardless of the operator’s level of experience, provided it is properly planned and executed.
Acurácia de três tomógrafos e dois softwares no diagnóstico de defeitos peri-implantares do tipo deiscência: estudo in vitro
(Universidade Federal de Goiás, 2022-03-04) Ferreira, Mário Serra; Silva, Maria Alves Garcia Santos; http://lattes.cnpq.br/9660554027842420; Silva, Maria Alves Garcia Santos; Roriz, Virgílio Moreira; Rabelo, Luiz Eduardo Gregoris; Sousa, Thiago Oliveira; Gasperini, Giovanni
In evaluating of the peri-implantitis, Cone Beam Computed Tomography (CBCT) has the advantage of estimating the bone site in a three-dimensional manner; however, the production of artifacts represents a negative factor against high-density materials. The objective of this work was to evaluate the accuracy of three CT scanners and two software in the identification and measurement of peri-implant dehiscence defects in vitro. For this, 36 bovine rib models were prepared to receive a Morse taper titanium implant Torq® 13 X 4,0 mm (Conexão, Arujá, São Paulo, Brazil). The ribs were divided into three groups: a group without bone defect as a control (n=12), a group with a dehiscence-like defect from 1.0 mm to 2.5 mm (n=12), and a group with a dehiscence-like defect > 2.5 to 4.15 mm (n=12). Rib blocks were submitted to CBCT using three different devices: Carestream 8100 3D (Carestream Health, Rochester, New York, USA), PreXion 3D (PreXion Inc, San Mateo, California, USA), and Orthopantomogram OP300 (Instrumentarium Kavo Kerr, Tuusula, Finland). These images were imported and processed by two software programs: e-Vol DX (CDT Software, Bauru, São Paulo, Brazil) and InVivo (Anatomage, San Jose, California, USA). Two evaluators experienced in identifying bone defects in tomographic images analyzed the presence/absence of a peri-implantitis dehiscence type defect and independently measured the size of the defect using a linear measurement tool using a five-point scale and measured the defect using a linear measurement tool. ROC curve was created to evaluate the accuracy, and the Friedman test was used to analyze the variables between the e-Vol DX and InVivo software. The results demonstrated a 100% accuracy value for defect detection with PreXion and Carestream and 98% for the OP300 across all defect sizes. The area under the curve presented 100% accuracy for InVivo and 99% for the e-Vol DX. Regarding measurement, the software showed a statistically significant difference, following the mean values: reference standard (2.6111), e-Vol DX (1.8542), and InVivo (1.5347). All equipment and software tested showed good accuracy in detecting dehiscence. In the measurement of defects, the e-Vol DX showed better results than the InVivo, but both software underestimated the real measurements.
Potencial antimicrobiano de diferentes protocolos de irrigação em canais radiculares infectados
(Universidade Federal de Goiás, 2015-03-19) Freire, Alessandro Moreira; Estrela, Carlos; Souza, João Batista de; http://lattes.cnpq.br/0642108682158061; Souza, João Batista de; Decúrcio, Daniel de Almeida; Estrela, Cyntia Rodrigues de Araújo; Estrela, Carlos
The aim of this study was to compare the antibacterial effect of irrigation protocols (positive, negative and passive ultrasonic pressure) using sodium hypochlorite 2.5% associated with root canal preparation with nickel-titanium instruments. Fifteen extracted maxillary central incisors were selected and root canals prepared, inoculated with E. faecalis and incubated at 37°C for sixty days. The teeth were randomly divided into 5 groups: Group 1 - automated root canal preparation (PACR) and irrigation with negative pressure (IPN) with sodium hypochlorite 2.5%; Group 2 - PARC irrigation and positive pressure (IPP) with sodium hypochlorite 2.5%; Group 3- PARC and passive ultrasonic irrigation (PUI) with sodium hypochlorite 2.5%. Groups 4 and 5 - positive and negative controls, respectively. Bacterial reduction was assessed in each group of three teeth using culture. In microbial culture, samples were taken from the root canals and immersed in 7 mL of Letheen Broth (LB) followed by incubation at 37 ° C for a period of 48 hours. The bacterial growth was assessed by turbidity of the culture medium followed by UV spectrophotometry. The average and standard deviation of the initial collection, 20 minutes collection and 72 hours collection were obtained. The difference between groups was evaluated by ANOVA for repeated measures, post hoc Bonferroni. Significance level was p <0.05. The antibacterial analysis of irrigation protocols with 2.5% sodium hypochlorite has not been effective in infected dentin by Enterococcus faecalis in 60 days, but there was bacterial reduction in all groups evaluated.
Avaliação da expressão tecidual dos ligantes de morte programada-1 e -2, do receptor PD-1 e da resposta imunológica citotóxica no líquen plano oral
(Universidade Federal de Goiás, 2020-05-29) Gonçalves, Julie Ane Maria; Costa, Nádia do Lago; http://lattes.cnpq.br/9120865567187887; Batista, Aline Carvalho; http://lattes.cnpq.br/0199082642322002; Costa, Nádia Do Lago; Mendonça, Elismauro Francisco de; Silveira, Ericka Janine Dantas da
Oral lichen planus (OLP) is a chronic autoimmune disease, mediated by T lymphocytes (TL) and characterized by apoptosis of basal/suprabasal keratinocytes. Although its etiopathogenesis is not completely elucidated, recent data reveal that blocking immunoregulatory molecules such as programmed death ligands (PD-Ls) and/or PD-1 receptor may promote the appearance of oral lichen planus-like lesions. It is classically established that this PD-Ls/PD-1 pathway contributes to evasion of neoplastic cells; however, it may be important in the regulation of helper and cytotoxic (CD8+) TL in autoimmune diseases. Objective: To investigate the tissue expression of PD-L1 and PD-L2 molecules, as well as PD-1+, CD8+ and granzyme B+ (GrB) cell populations in OLPs and whether there is a relationship between these immunoinhibitory proteins/cell populations and the severity of OLP. Material and methods: Samples of OLP patients (n = 23) were classified according to the histopathological criteria of the American Association of Oral and Maxillofacial Pathology (AAOMP/2016) and submitted to immunohistochemistry. Semi-quantitative (PD-L1+ and PD-L2+) and quantitative analysis (PD-1+, CD8+ and GrB+ cells) were performed. The severity of OLP was assessed by clinical subtype, symptomatology and response to corticosteroid therapy. Results: Most OLP samples were considered negative for PD-L1 (n = 14/22; 63.7%), however high PD-L2 expression (n = 19/22; 86.3%) by both keratinocytes and immunoinflammatory cells has been demonstrated. Low cytotoxic immune response (CD8/GrB ratio per mm2) was evidenced in OLP samples (subepithelial: 1047.4/140.6 and intraepithelial: 197.7/41.6). In addition, PD-1+/mm2 (subepithelial: 70.2 and intraepithelial: 7.4) cell density was reduced compared to CD8+/mm2 LT (subepithelial: 1047.4 and intraepithelial: 197.7) (p <0.01). There was a significantly lower number of GrB+ cells in the intraepithelial region in reticular OLP compared to erosive / bullous OLP (p = 0.03). Conclusions: The findings show that the PD-L1 / PD-1 pathway seems to be compromised in OLP due to low PD-L1 expression and PD-1 + cell scarcity in most samples. On the other hand, PD-L2 overexpression added to a possible regulation of cytotoxic immune response suggests an immune tolerance that may contribute to the chronic profile of OLP.
Influência da morfologia facial no volume das vias aéreas superiores
(Universidade Federal de Goiás, 2011-12-16) Lenza, Milena Moraes de Oliveira; Lenza, Marcos Augusto; http://lattes.cnpq.br/0734929669869820; Lenza, Marcos Augusto; Barros, Sérgio Estelita Cavalcante; Botelho, Tessa de Lucena
Although controversial, the influence of upper airways in craniofacial morphology has been extensively studied, though most of the studies were performed in a two-dimensional lateral cephalograms in assessing complex three-dimensional structures. To better assess the upper airway Cone Beam Computed Tomography scans are being increasingly used as a means of diagnosis. The objective of this study was to evaluate three-dimensional variations in the volumes of the upper airways in patients with different facial morphological characteristics. The sample consisted of DICOM images (Digital Imaging and Communications in Medicine) of 45 patients previously treated in the Postgraduate Clinic of the Orthodontic Department at the University of Aarhus, Denmark. The inclusion criterion was that every patient had a 12” CBCTscan (NewTom 3G, QR s.r.l.; AFP Imaging, Elmsford, NY, USA) in occlusion. These files were imported into a specific software (Mimics 12.13 - Materialise Interactive Medical Image Control System, Belgium), enabling the reconstruction and image generation in 3D multiplanar cuts, which allowed its visualization and evaluation in the coronal, sagittal and transverse planes, besides its three-dimensional structure. The results showed that the volume of upper airway shown to be influenced by the skeletal pattern, especially when comparing the volume of Class II patients with volumes of Class III patients and when compared with brachyfacial and dolichos patients. The volume of the upper airways is influenced by the skeletal pattern, it has been observed a wide variation in the volume of airways independent of sagittal or vertical skeletal pattern.
Incidência de eventos de manutenção relacionados à matriz de retenção em overdentures mandibulares retidas por um ou dois implantes e diferentes sistemas de retenção
(Universidade Federal de Goiás, 2021-06-30) Melo, Patrick Borges de; Nogueira, Túlio Eduardo; http://lattes.cnpq.br/5622401475518280; Leles, Cláudio Rodrigues; http://lattes.cnpq.br/6740286066154410; Leles, Cláudio Rodrigues; Cruvinel, Diogo Rodrigues; Hartmann, Roberto
To assess the incidence of maintenance events related to retention matrices of totally edentulous individuals rehabilitated with mandibular overdentures retained by one or two implants, with Neodent branded spherical abutment and nylon matrix retention system (groups N1 – 1 implant and N2 – 2 implants) or Straumann branded spherical abutment and metalIC matrix (groups S1 – 1 implant and S2 – 2 implants). Materials and methods: This was a prospective cohort study and included 70 patients (N1=11; N2=13; S1=22; S2=24) who participated in two randomized clinical trials, previously performed at the Center for Research in Prosthodontics and Implant at the Federal University of Goiás (UFG), followed for a mean period of 28.7 months (SD=9.8; 12.0-47.2). Cumulative incidences, incidence densities and time-event estimation using Kaplan-Meier analysis were calculated.Results: The mean number of matrix-related events per participant was 1.33 (SD=1.25, 0-6), with a significantly higher incidence of matrix replacement (p<0.001) in nylon matrix overdenture wearers. The classification of the type of visit (scheduled or non-scheduled) was similar in participants with 1 or 2 implants (p=0.267). Visits to replace the retention matrix occurred during unscheduled appointments in 63.6% of the total events, and 36.4% during scheduled appointments (p=0.015). There was no statistically significant difference in retention matrix events (replacements and activations) between participants with overdenture retained by 1 or 2 implants (p=0.864). Time to occurrence of matrix exchange was similar among participants treated with overdenture retained by 1 or 2 implants (p=0.924). There was no significant difference in the total number of matrix events in relation to the number of implants during the follow-up period (p=0.710). The retention system with metallic matrix (groups S1 and S2) showed superior performance compared to the nylon matrix (groups N1 and N2), with a statistically significant difference (p=0.009). Conclusion: There was no statistically significant difference in the incidence of maintenance events related to the matrix between the groups. There was a significantly higher number of events in the nylon matrix group, regardless of the number of implants used to retain the mandibular overdenture.
Desenvolvimento de um serious game de educação em saúde bucal com participação de especialistas e usuários
(Universidade Federal de Goiás, 2022-02-25) Mendonça, Thaís Silva; Carvalho, Sérgio Teixeira de; http://lattes.cnpq.br/2721053239592051; Costa, Luciane Ribeiro de Rezende Sucasas da; http://lattes.cnpq.br/9906371509661305; Carvalho, Sérgio Teixeira de; Jordão, Lidia Moraes Ribeiro; Naghettini, Alessandra Vitorino
Children have experienced digital technologies since young ages, especially educational games (serious games). With the increase in smartphones, tablets, and computers, applications aimed at health promotion have multiplied. When educational games are appropriately developed, users learn content quickly and efficiently. There is a lack of scientific studies on educational games in pediatric dentistry. It was proposed to regionalize the game Barney's healthy foods, developed internationally for children's oral health education, from the perspectives of specialists and users. This descriptive study was developed in three phases: I) discussion with experts based on the improved version in Jordan; II) development of the first Brazilian version of the game; III) test of the first version with children from 4 to 8 years of age and companions. PHASE I, twelve specialists interested in health education, oral health or health technologies participated in a focus group to assess the relevance of regionalizing the game for Brazil. The transcripts of the specialists' speeches were analyzed by content analysis, which originated categories with the respective main indications of alteration: eating habits - adaptation to the Brazilian context, oral hygiene habits - inclusion of dental floss and attention to the amount of fluoride toothpaste; indicative age group – reduce to 4 to 8 years; characters – change the squirrel for an animal from the Brazilian fauna; objective – to be less prescriptive and to promote the child's autonomy to choose food. PHASE II, the original game's source code was obtained from the University of Jordan. After analyzing the feasibility of the modifications suggested by the experts, the game's programming was changed. A version was obtained with images adapted to Brazil, language in Brazilian Portuguese and content with minor changes. PHASE III, fifteen children (mean age 6.4 years, standard deviation 1.3, 9 boys) played the Brazilian version once, under the observation of the accompanying adults (13 mothers) and the researcher. The global average of correct answers in the game's tasks was 75.3% and ranged from 50.0% to 100%. Children had fun with the game, and most understood the content and its interface. The companions found the information relevant and enjoyed the gameplay for their children. We conclude that the developed Children's Oral Health Game provides relevant information on dental caries prevention after a systematic regionalization process that heard the voices of specialists and users.
Desenvolvimento e implementação de uma escala de autoeficácia em saúde oral para usuários de overdenture mandibular
(Universidade Federal de Goiás, 2023-11-06) Moore, Steven Kadeem; Leles, Cláudio Rodrigues; http://lattes.cnpq.br/6740286066154410; Leles, Cláudio Rodrigues; Srinivasan, Murali; Nogueira, Túlio Eduardo
Introduction: Self-efficacy, a concept coined by Albert Bandura, refers to an individual's belief in their ability to perform behaviors necessary to achieve specific performance goals. In the context of oral health, self-efficacy plays a pivotal role in influencing behaviors related to oral hygiene practices. Objective: This study aimed to develop an oral health self-efficacy scale and evaluate the relationship between oral health self-efficacy and the peri-implant health status of individuals using implant-retained overdentures. Materials and Methods: This was a cross-sectional observational study nested within a clinical trial at the Prosthesis and Implant Research Center (NPPI) at the Federal University of Goiás (UFG), Goiânia, Brazil. The project received approval from the Ethics Committee for Research at the Federal University of Goiás. A 25-item questionnaire was developed based on the Dental Self-Efficacy Scale (DSE), revised by a panel of experts, translated into Brazilian Portuguese, and piloted for clarity. The 25-item OHSE-OVER questionnaire collected data across four dimensions: (1) routine challenges – 4 items; (2) self-rated performance – 5 items; (3) attitudes towards oral health – 6 items; (4) challenges in special occasions – 10 items. The questionnaire score was calculated by first reversing the scale of dimensions 1 and 4 and then summing the scores of all dimensions. The final score repre-sented oral health self-efficacy (higher scores indicating greater oral health self-efficacy). The study included patients with mandibular overdentures retained by implants as part of a larger study involving mini-implants. Randomization was based on a surgical approach and loading protocol. All clinical procedures took place at NPPI/UFG, with no cost to the participants. Twelve-month follow-up assessments included pillar plaque evaluations, peri-implant bleeding, and denture surface plaque. A single clinician conducted clinical assessments for all patients and administered the Oral Health Self-Efficacy Evaluation for Overdenture Users (OHSE-OVER) questionnaire in an interview format during evaluation. Clinical data were compared with OHSE-OVER questionnaire responses. Statistical analyses, including Confirmatory Factor Analysis and regression, were conducted using IBM-SPSS 22.0 and Mplus 8.8 software, with a significance level of p < 0.05. Results: Out of the initially invited 74 patients, 69 participated in the study. Among them, the majority were female (63.8%), aged between 36 and 81 years (mean = 65.0; SD = 8.1), with nearly half being current or ex-smokers (47.8%), and most were taking regular medication (82.6%). Self-efficacy scores varied across different dimensions, with an overall mean score of 2.35. The scale demonstrated good reliability (Cronbach's alpha = 0.799). Con-firmatory factor analysis supported the four-factor model, with the removal of two items due to their low factor loadings. Regression analysis revealed that higher self-efficacy was linked to better denture hygiene outcomes in the overall scale, a positive association between oral health self-efficacy and sex(male), as well as an inverse relationship between oral health self-efficacy and plaque index in dimensions 1 and 2, respectively. No significant associations were observed in dimensions 3 and 4. Conclusion: The research underscores the fundamental role of self-efficacy in determining oral health outcomes in individuals using implant-retained overdentures. It establishes a significant association between oral health self-efficacy and key oral hygiene indicators, such as plaque index and denture hygiene, in patients relying on implant-retained overdentures. Additionally, the validation of the OHSE-OVER's psychometric robustness and internal structure reinforces its efficacy as a valuable instrument specifically developed to assess and address oral health self-efficacy in patients with mandibular overdentures, both in clinical and research contexts.
Avaliação de cimentos e técnicas de obturação no preenchimento de istmos radiculares usando um novo software de tomografia computadorizada de feixe cônico
(Universidade Federal de Goiás, 2022-05-25) Morais, André Luiz Gomide de; Estrela, Carlos; http://lattes.cnpq.br/3611967334176683; Oliveira, Helder Fernandes de; Siqueira, Patrícia Correia de; Silva, Júlio Almeida; Silva, Brunno Santos de Freitas; Estrela, Carlos
Aim: To evaluate the sealing ability of root isthmuses using different sealers and root canal filling techniques using a new Cone Beam Computed Tomography software (e-Vol DX). Methodology: 120 lower molars extracted from patients with indication for extraction were used. The teeth were divided into 6 groups according to the endodontic sealer and filling technique: G1: AH Plus® + lateral condensation technique (n=20), G2: AH Plus® + Tagger's hybrid technique (n=20), G3: AH Plus® + single cone technique (n=20), G4: BioRoot RCS + lateral condensation technique (n=20), G5: BioRoot RCS® + Tagger hybrid technique (n=20) and G7: BioRoot RCS® + single cone technique (n=20). The teeth were instrumented using the Wave One Gold® reciprocating system, irrigation performed with 2.5% sodium hypochlorite and EDTA (using ultrasonic passive irrigation) and then all canals were filled according to the division of the groups. Sealing evaluation was performed using scores. Nonparametric statistics were used for its analysis and the description was performed by median, minimum and maximum. Mann Whitney test was used to compare the scores between the sealers and Kruskal-Wallis test followed by Dunn-Bonferroni post hoc tests between the obturation techniques and groups. To compare scores obtained with and without Blooming Artifact Reduction (BAR) filter of e-Vol DX software, Wilcoxon test was used. Results: Results showed there was a significant difference in sealing lower molar isthmus using endodontic sealers studied in apical third with BAR (p=0.016), with scores being higher for AH Plus®. There were differences in sealing of lower molar isthmus using different filling techniques in middle and apical thirds. For middle third without BAR, difference was between single cone and Tagger's hybrid techniques (p=0.011) as well as for apical third without BAR (p<0.001). For middle third with BAR, difference was between single cone technique and lateral condensation (p=0.043) and Tagger hybrid (p=0.009) techniques. For apical third with BAR, the difference was between Tagger's hybrid technique and single cone (p<0.001) and lateral condensation (p=0.041) techniques. When comparing the sealing scores using different filling techniques and types of sealer, there were differences between G2 and G3 (p=0.015) and G2 and G6 (p=0.024) in apical third without BAR. Using BAR tool, statistical differences were as follows: in cervical third between G2 and G6 (p=0.023); in middle third, between G2 and G6 (p=0.072); in apical third, G6 had lower scores than G1 (p=0.046), G2 (p=0.002) and G5 (p=0.011) and G4 had lower scores than G2 (p=0.023). When comparing isthmus sealing scores with and without using BAR tool, there were significant differences, with higher values without using the tool, in all thirds. It is concluded that, when evaluating sealing ability of root isthmus using different sealers and filling techniques with e-Vol DX software, the best combination was the use of AH Plus and Tagger's hybrid technique. Using BAR filter of the eVol DX software in CBCT images showed more empty spaces in filling mass due to the reduction of white expansion, making tomographic image more reliable.

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