Mestrado em Odontologia (FO)

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Efeito do pré-aquecimento e da pós-polimerização nas propriedades mecânicas e grau de conversão de um compósito experimental reforçado com fibra de vidro
(Universidade Federal de Goiás, 2016-02-25) Almeida, Letícia Nunes de; Fonseca, Rodrigo Borges; http://buscatextual.cnpq.br/buscatextual/visualizacv.do?metodo=apresentar&id=K4770435A0; Fonseca, Rodrigo Borges; Souza, João Batista de; Menezes, Murilo de Souza
The pre-heating and post-curing can improve the mechanical properties of composites, even though there be no studies of fiber reinforced composites. The aim of this study was to evaluate the effect of pre-heating and post-curing autoclave and microwave in flexural strength (FS), diametral tensile strength (DTS), knoop microhardness (KHN) and degree of conversion (DC) of a experimental fiber- reinfoced composite. The experimental material was prepared with 30% glass fibers (3 mm), 22.5% of the resin matrix (40/60 Bis-GMA / TEGDMA) and 47.5% barium silicate particles. Six experimental groups were created by the interaction between the factors under study: heating, on two levels (without heating and heating at 60°C) and post-curing in 3 levels (conventional curing without post-curing, autoclave (120°C for 15 minutes) and microwaves (540 W for 5 minutes) The groups were: F - curing at 1500 mW/cm2 for 40 seconds; F + M - curing and post- polymerization in microwave; F + A - curing and post-curing in an autoclave , AQ + F - the composite heating prior to curing, AQ + F + M - heating prior to curing and post-curing in microwave;. AQ + F + A - heating prior to curing and post-curing and autoclave heating was conducted digital oven for 5 minutes at 60°C. Ten samples of the RF dimensions 25 x 2 x 2 mm and DTS in dimensions of 3 x 6 mm were tested in a universal testing machine Instron 5965, 0.5 mm/min. the KHN test was performed on samples of 3 x 6 mm with a load of 50 g for 30 sec, totaling 50 indentations per group. GC was obtained by Spectroscopy Fourier Transform Infrared (FTIR) on 5 samples. Data were analyzed by a factorial 2x3 and general linear model ANOVA and Tukey tests (α = 0.05). Factor analysis showed significant interaction between the factors just for RTD (p = 0.0001); preheating was significant factor for RF (p = 0.0001), RTD (p = 0.020) and KHN (p = 0.0001); post-curing factor for KHN was significant (p = 0.0001). ANOVA and Tukey tests showed statistically significant differences between groups for DTS (p = 0.001: AQ + F ≥ AQ + F + M = F + A = AQ + F + A = F + M ≥ F), FS (p = 0.016: AQ + F + M ≥ AQ + F + A + F = AQ = AQ + A + M ≥ F ≥ F) and KHN (p = 0.0001: AQ + F + M ≥ AQ + A + F = F = F + A + M ≥ F ≥ M + AQ). GC results showed no statistically significant difference. Through the Pearson correlation coefficient was observed significant positive correlation between the GC and RTD (r = 0.473, p = 0.008) and between DTS and FS (r = 0.263, p = 0.042). The pre-heating and post- polymerization were shown to be favorable to promote better mechanical properties of fiber reinforced composite by studied, specific for each property being analyzed.
Detecção de microorganismos em fios novos e usados
(Universidade Federal de Goiás, 2015-03-06) Alves, Celha Borges Costa; Lenza, Marcos Augusto; http://lattes.cnpq.br/0734929669869820; Lenza, Marcos Augusto; Nery, Cláudio de Góis; Fantini, Solange Mongelli de
Os fios de níquel-titânio (NiTi) termoativados revolucionaram o campo da ortodontia em decorrência de sua capacidade elástica e memória de forma. Entretanto, essas características aumentam seu custo. A reutilização dos fios ortodônticos após o uso clínico e os processos de desinfecção e esterilização, mediante a comprovação de sua descontaminação total por intermédio de testes microbiológicos, permitiria baixar custos no tratamento ortodôntico, beneficiando o profissional e o paciente, além de contribuir para a preservação de recursos naturais. Assim, no presente estudo, objetivou-se avaliar a presença de micro-organismos na superfície de fios ortodônticos novos e após uso clínico e submetidos a processos de desinfecção e esterilização, utilizando testes microbiológicos nos meios de cultura ágar sangue, ágar chocolate e ágar MacConkey. Para isso, foram utilizados 18 segmentos de fios de copper NiTi (Ormco®) de 0,018 pol, divididos em três grupos: a) grupo controle (GC) – seis segmentos de fios novos, como fornecido pelo fabricante; b) grupo 1 (G1) – seis segmentos de fios retirados de pacientes após 60 dias de uso clínico; c) grupo 2 (G2) – seis segmentos de fios retirados dos mesmos pacientes após 60 dias de uso clínico e submetidos a processos de desinfecção e esterilização. Os segmentos de fios do GC, G1 e G2 também foram avaliados por microscopia eletrônica de varredura (MEV) para detectar a presença de microorganismos e possíveis alterações de topografia. Constatou-se ausência de micro-organismos em 100% dos fios ortodônticos do GC e do G2 avaliados pelos testes microbiológicos, enquanto no G1 observou-se presença de micro-organismos em 100% das amostras analisadas. Conclui-se que o uso clínico dos fios ortodônticos pelo período de 60 dias e os processos de desinfecção e esterilização não produziram alterações na superfície topográfica dos fios, o que permite sua reutilização em tratamentos ortodônticos.
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.
Análise das relações de poder na política nacional de saúde bucal: o dito e o visto
(Universidade Federal de Goiás, 2008-04-08) ANDRADE, Flávia Reis de; MARCELO, Vânia Cristina; http://lattes.cnpq.br/6650368201862218
In order to consolidate the principles underlying the Brazilian Unified Health System (Sistema Único de Saúde SUS) and with the aim of acting on evidence arising out of epidemiological research in dental health, the Ministry for Health decided to structure the National Policy for Dental Health (NPDH). This study sets out to analyze the power relationships in the drawing up of the NPDH. It is a descriptive study which uses the qualitative method as its approach. The data was obtained through individual semi-structured interviews with 15 participants. The content analysis technique was used for the interpretative examination of the material transcribed. The following categories emerged: participant actors, type of participation, initial outline, (re)discussion lists, political context, present impasses and perspectives. The participant actors were divided into two groups: individual and collective. The former, a coherent group, was made up of people who identified with the victorious political project of the 2002 presidential elections, and who had undoubtedly struggled to build the SUS. It was the task of the second group to give approval to what the first had expounded. The interviewees were influential in the shaping of the NPDH, both through the research they undertook (academy) and through the movements in which they participated (services, militancy). It is impossible to define precisely the moment when the drawing up of the NPDH started, as it was a slow process taking place over at least a quarter of a century. The most visible milestone for the beginning of the broad official and unofficial debates which outlined the Policy, was the result of a series of reflections starting with the Movement for Sanitary Reform. Thus, the NPDH is made up of a set of deliberations arising out of different moments of discussion, but especially the meeting held in the Municipality of São Paulo, following on the election results of Luiz Inácio Lula da Silva s campaign for Presidency of the Republic in 2002. This meeting defined the proposal presented to the members of the Governmental Transition Commission and it marked the beginning of a period of intense normative work by the Health Ministry s Advisory Commission to the National Coordination of Dental Health. This resulted in the drawing up of a document entitled Guidelines on the National Policy for Dental Health , ratified by the 3rd National Conference on Dental Health. The NPDH now presents symptoms of growth as well as those of early degeneration. As potential internal weaknesses, one can cite the improper management of financial resources in particular and the growing tendency of the NPDH to be characterized as a provider of specialized odontological services. However, the greatest preoccupation is that the people who did not in fact participate in drawing up the Policy (for lack of opportunity) are today the pillars of its consolidation. Those who try to understand the process of drawing up the NPDH frequently come up against the nouns group and consensus. This therefore shows a clear approximation to the Arendtian concept of power. However, the present preoccupying indexes of the internal degeneration of the Advisory Commission would point towards another form of power in the implantation phase of the National Policy for Dental Health.
Influência da proporção de partículas de reforço nas propriedades mecânicas de um compósito experimental
(Universidade Federal de Goiás, 2015-03-24) Andrade, Rodrigo Rocha; Fonseca, Rodrigo Borges; http://lattes.cnpq.br/8629552867290605; Fonseca, Rodrigo Borges; http://lattes.cnpq.br/8629552867290605; Gonçalves, Alberto Magno; Reges, Rogério Vieira
Previous studies show that there is effective interaction between silanized glass fiber and resin matrix formed by methacrylates; However, there is no information on the use of milled glass fiber and the resin incorporated as a filler particle in order to obtain better mechanical properties in composites for the manufacture of intraradiculares pins. The objectives of this study were to evaluate the influence of different types (barium silicate and / or glass fiber powder) and charged particle concentrations in flexural strength, resistance to diametrical and Knoop microhardness traction, an experimental composite composed of 47.5% loading of particles, 30 % glass fiber and resin matrix of 22.5% (BISGMA and TEGDMA (1: 1)); evaluate the morphology of the filler particles and their interaction with the experimental composite in scanning electron microscopy. For producing glass fiber powder, fibers were milled in a mortar grinder / pestle, and then six experimental groups (N = 10) were prepared, varying the ratio of the kind of charged particle: CONTROL - 47.5% barium silicate and 0.0% glass fiber powder; G7.5 - 40.0% barium silicate and 7.5% glass fiber powder; G17.5 - barium silicate 30.0% and 17.5% glass fiber powder; G27.5 - barium silicate 20.0% and 27.5% glass fiber powder; G37.5% - 10.0% barium silicate and 37.5% glass powder vibrates; G47.5% - 0.0% barium silicate and 47.5% glass fiber powder. Cylindrical samples (3 mm x 6 mm) were produced for the diametral tensile strength test, and samples in bar format (25 mm x 2 mm x 2 mm) for flexural and microhardness knoop throws. Resistance tests were performed at 0.5 mm / min on a universal testing machine (Instron 5965). The Knoop microhardness test was made 0.2 KHN (200 g) for 40 seconds at a hardness tester (Shimadzu HMV2). After verification of normality and homogeneity of data distribution with the Kolmogorov-Smirnov test, the data were submitted to ANOVA and Tukey tests (α = 0.05). Statistical analysis demonstrated (p = 0.001): flexural strength: CONTROL - 259.91 ± 26.01a; G7.5 - 212.48 ± 35.91b; G17.5 - 177.63 ± 24.88bc; G27.5 - 166.58 ± 30.84c; G37.5 - 92.08 ± 6.46d; G47.5 - 80.60 ± 17.89d; Diametral tensile strength: CONTROL - 31.05 ± 2.98a; G7.5 - 14.55 ± 3.70b; G27.5 - 12.65 ± 3.34bc; G17.5 - 8.62 ± 3.51cd; G47.5 - 8.04 ± 1.63d; G37.5 - 6.63 ± 2.85d; Knoop microhardness: CONTROL - 75.69 ± 12.19a; G37.5 - 67.62 ± 1.79ab; G27.5 - 65.72 ± 2.01b; G47.5 - 64.06 ± 1.61b; G7.5 - 62.79 ± 2.79b; G17.5 - 59.87 ± 2.33b. The gradual substitution a percentage of the barium silicate glass fiber powder in a glass fiber reinforced composite trial resulted in a decrease in the results of flexural strength, diametral tensile strength and Knoop hardness. Morphologically, glass fiber powder made up of particles with heterogeneous and larger than the particle of barium silicate. The interaction of the glass fiber powder to the resin matrix and fiber reinforcement have not proved effective.
A tradução do conhecimento nas práticas de Promoção da Saúde
(Universidade Federal de Goiás, 2014-02-05) Arantes, Bárbara Morais; Marcelo, Vânia Cristina; http://lattes.cnpq.br/6650368201862218; Marcelo, Vânia Cristina; Costa, Luciane Ribeiro Rezende Sucasas da; Nunes, Maria de Fátima
Much knowledge has been produced in the area of Health Promotion (HP), but this information is not always translated so that it can be incorporated into everyday practice of health managers and professionals at the local level. The knowledge translation (KT) can contribute to more effective processes in health. The aim of this study was to analyze the effectiveness of KT in the context of health promotion for managers and professionals in public health. The strategies used were literature survey, semi-structured narrative interviews with managers and professionals of a large municipality and documentary analysis of Health Promotion. Content analysis was applied to establish the analytical categories. About the concepts of HP, it was noted that there is still a great confusion with other concepts; the HP actions reported arouse from programs and official publications and the respondents considered any action which was not clinical as being HP; knowledge sources of HP were associated with official documents more than with scientific papers, which were referred only when postgraduate courses were taken; little is known about knowledge translation; the main challenges were related to access and to scientific language, the access to publications of scientific papers has become more available online; among the challenges it is highlighted the great demand for permanent education for managers and professionals. We conclude that the knowledge translation in the context of health promotion takes place most effectively by the primary care team, which by managers; there is still confusion of content and concepts of health promotion with strong linkages to prevention and education health; promotion practices are associated to those induced by public policies and programs predominantly from official documents and manuals from the Ministry of Health, principal source used by managers and professionals, access to new knowledge was associated with the academic world by internet, official sources by the documents and manuals, on the processes of knowledge translation most important were collective activities such as workshops and reading group, among these challenges include the difficulty of access to restricted sites and / or paid on the Internet, setting up spaces for discussion and exchange of experiences.
Avaliação da expressão salivar e tecidual das citocinas TGF-β e IL-10 em pacientes com carcinoma espinocelular de cavidade oral
(Universidade Federal de Goiás, 2015-03-02) Arantes, Diego Antonio Costa; Costa, Nádia do Lago; Batista, Aline Carvalho; http://lattes.cnpq.br/0199082642322002; Batista, Aline Carvalho; Guerra, Eliete Neves da Silva; Fonseca, Simone Gonçalves da
The transforming growth factor β (TGF-β) and interleukin 10 (IL-10) are immunosuppressive cytokines which promote failure of the local anti-tumor immune response and, therefore, influence the proliferation and prognosis of malignant neoplasms. The aim of this study was to investigate the tissue and salivary expression of TGF-β and IL-10 in patients with oral squamous cell carcinoma (OSCC) and compare it with that of healthy subjects (Control). The association of these cytokines with clinical parameters of prognosis (staging, metastasis and survival) and histological grade of malignancy (WHO grading) was also investigated. Cytokines in the tissue (OSCC, n = 65; Control, n = 30) were identified using the immunohistochemistry technique (IHC) and in the saliva (OSCC, n = 22; Control, n = 23) the Enzyme-linked Immunosorbent Assay (ELISA) was used. The tissue expression of TGF-β and IL-10 in metastatic lymph nodes (n = 23) of OSCC patients was investigated. The expression of TGF-β and IL-10 in the tissue was measured using a semi-quantitative method in conjunction with staining intensity. Our findings demonstrated a high tissue expression of IL-10 and TGF-β2, and a low or absent expression of TGF-β1, in the majority of OSCC samples when compared to the group with clinically healthy oral mucosa (Control) (p < 0.05 for IL-10 and TGF-β2). The salivary concentration of IL-10 was also high, and distinguished the OSCC patients from their healthy counterparts (p = 0.04), while the salivary concentration of TGF-β1 was similar for both the OSCC and control groups (p = 0.97). The relationship between the cytokine expression and clinical and microscopic prognostic factors showed that the expression of IL-10 and TGF-β2 in neoplastic cells of the primary tumor was maintained by the metastatic neoplastic cells in the cervical lymph nodes. The expression of TGF-β1 remained low or absent in the metastatic lymph nodes. It was shown that there was an association between the high expression of IL-10 by tumor cells and the advanced clinical stages (T3-T4) of patients (p = 0.02). Although not statistically significant, the expression of TGF-β2 was higher in tumors at more advanced stages (p > 0.05). These findings demonstrate that OSCC provides an immunosuppressive environment conducive to tumor proliferation, with high expression of IL-10 and TGF-β2, which contributes to a worse clinical prognosis. In addition, of the immunosuppressive cytokines investigated, IL-10 has greater potential for becoming salivary biomarker when associated with an unfavorable clinical prognosis of OSCC patients.
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.
Avaliação de deiscência e fenestração por meio de tomografia computadorizada volumétrica em pacientes com maloclusão de Classe I e Classe II Divisão 1
(Universidade Federal de Goiás, 2009-01-16) Arruda, Karine Evangelista Martins; Silva, Maria Alves Garcia Santos; http://lattes.cnpq.br/8760691456576488; Silva, Maria Alves Garcia Santos; Almeida, Guilherme de Araújo; Mendonça, Elismauro Francisco de
The effects of orthodontic treatment on periodontal structures have been studied in literature, especially regarding the integrity of alveolar bone and gingival health of the teeth to be displaced. The aim of this study was to evaluate the presence of alveolar defects (dehiscence and fenestrations) in patients with Class I and Class II division 1 malocclusions and in different facial types using cone beam computed tomography (CBCT). The sample comprised 159 tomography exams of patients with no previous orthodontic treatment, giving a total of 4319 teeth. The presence or absence of dehiscence and fenestration in the buccal and lingual surfaces was checked in axial and crosssectional views. The results showed that 155 patients (96.9%) presented some type of alveolar defect. The Class I malocclusion patients presented higher prevalence of dehiscences (35%) than those with Class II division 1 malocclusion. There was no statistically significant difference between the facial types. Lower incisors, lower canines and lower first premolars were respectively the teeth with more occurrences of alveolar defects. This study concluded that CBCT is indicated for patients who need extensive tooth movement and have unfavorable gingival biotype.
Avaliação clínico-radiográfica de características ósseas no tratamento com implantes dentários: correlação entre métodos pré e transcirúrgicos
(Universidade Federal de Goiás, 2009-08-31) Barbosa, Gláucia Kelly Silva; Ribeiro-Rotta, Rejane Faria; http://lattes.cnpq.br/9466795079344876; Ribeiro-Rotta, Rejane Faria; Leles, José Luiz Rodrigues; Silva, Maria Alves Garcia Santos
Several methods have been used to evaluate the bone quality in implant treatment planning, which has been described as important factor for the therapeutic success. However, besides bone quality is a wide term without a clear definition, the evidence of the efficacy of the methods to assess it is scarce. The correlations of these measurements could optimize treatment planning. Aim: To correlate clinical-radiographic subjective and objective methods for evaluating the bone of maxilla and mandible to implant treatment. Materials and Methods: 94 dental implants (Titamax TI Cortical – Neodent, Curitiba, PR, Brazil) were placed into posterior and anterior regions of maxilla (n=40) and mandible (n=54) from 33 patients with the two-stage technique. Implants diameter ranged from 3.75 mm to 5.0 mm and implants length from 9.0 mm to 13.0 mm. The bone was assessed by three independent examiners, using four methods: a) Panoramic and periapical radiographs + tactile perception - Lekholm & Zarb original classification (L&Zoriginal), b) Panoramic and Periapical radiographs – Lekholm & Zarb modified classification (PP), c) trabecular bone pattern – classification of Lindh (Lindh), and d) maximum insertion torque values (MIT) (BLM 600 Plus Engine – Driller, São Paulo, SP, Brazil). Results: There was moderate agreement between L&Zoriginal and PP (Kappa = 0,61). The insertion torque ranged from 15 to 80 Ncm (Mean=33,98; SD=17,15) showing significant correlation with only L&Zoriginal. Conclusions: Changes in the performance of one of the most used bone classification method in implant treatment planning (L&Zoriginal) altered its result. The evaluation of bone quality through L&Zoriginal classification in implant planning can be important for prediction of primary stability.
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
Expressão de marcadores de células-tronco mesenquimais em abscesso e granuloma periapical
(Universidade Federal de Goiás, 2019-05-07) Barbosa, Mateus Gehrke; Silva, Brunno Santos de Freitas; http://lattes.cnpq.br/1575170017237525; Estrela, Carlos; http://lattes.cnpq.br/3611967334176683; Estrela, Carlos; Silva, Julio Almeida; Sousa Neto, Manoel Damião de
Introduction: The relationship between inflammation, the formation of periapical lesions and mesenchymal stem cells need further elucidation. Evidence for the characterization of mesenchymal stem cells in periapical abscesses and granulomas becomes opportune for a better understanding of the periapical lesion microenvironment formation. Objective: To evaluate the immunohistochemical expression of CD44, CD73, CD105 and CD45 markers of mesenchymal stem cells in periapical lesions of teeth with histopathological diagnosis of abscess and periapical granuloma by means of immunohistochemistry. Methodology: Samples of periapical lesions diagnosed as abscess (n = 10) and periapical granuloma (n = 10) were selected from teeth of patients attended at the Emergency Department of the Faculty of Dentistry of the Federal University of Goiás (FO / UFG) kept in blocks of paraffin on the bench of the Endodontic Science laboratory. The diagnostic confirmation of the samples was made from the analysis of the slides with hematoxylin and eosin staining. The immunohistochemical expression of the CD44, CD73 and CD105 positive markers and the CD45 negative marker was analyzed, and the presence or absence of positive cells was evidenced in the area examined. It was considered as immunohistochemical expression of mesenchymal stem cells when there was the expression of the three positive markers and no expression of the negative marker. The frequencies of the qualitative variables were obtained. Qualitative variables were assessed using the Chi-square test. Values of p <0.05 were considered significant. Results: Expression of mesenchymal stem cells was confirmed by positive expression of CD44, CD73 and CD105 markers and absence of CD45 marker expression. This occurred 40% (4/10) in cases of abscesses and in the group of granulomas in 20% (2/10) of the cases. Conclusions: Abscess and periapical granuloma presented immunohistochemical expression of mesenchymal stem cells. The cases of periapical abscesses presented a higher percentage of immunohistochemical expression for mesenchymal stem cells than those of periapical granumola.
Avaliação da satisfação e qualidade de vida dos pacientes usuários de próteses sobre implantes (protocolo e overdenture) desenvolvidas em instituições de ensino odontológico públicas e privadas
(Universidade Federal de Goiás, 2007-10-01) Braga, Michelle; Guilherme, Adércio Santana; Guilherme, Adérico Santana; Cury, Altair Antoninha Del Bel; Zavanelli, Ricardo Alexandre
The patient satisfaction is a relevant aspect that actually matters with regards to the success of the treatment. And it is also so important that it must be regarded as an imperative outcome parameter.Considering the lack of scientific studies about patient satisfaction variables and oral health–related quality of life in implant supported prothesis therapy (protocol and overdenture). Based on these concerns, the aim of this study is to evaluate the satisfaction and oral health-related quality of life in patients with fixture-retained prostheses (protocol and overdenture); then to establish comparisons between groups (protocol and overdenture) and intra-group (bar-clip and individual retainers) comparisons that were held in implant postgraduate courses of private and public institutions. This paper is a cross-sectional study and the patient selection was based on data from the patients’ files from private and public institutions. The sample consisted of 35 subjects, including males and females, with age ranging from 43 to 77, treated with implant-anchored full prostheses in the last 4 years. Fifteen patients had implant-retained complete prostheses, 19 patients had implant-supported overdentures, and from these 20, 12 had bar-clip retainers and 8 had individual retainers. The patient satisfaction variables and oral health-related quality of life were assessed through self-questionnaires and a short form of the Oral Health Impact Profile (OHIP-14). The data were gathered and estimated in a database customized specifically for the research using Windows Excel and the statistical analyses were made by SPSS for Windows (13.0). The Kruskall-Wallis test (non-usual distribution of researched data) was used and the Cronbach’s α was used for checking the reliability of the instruments. In conclusion, there were no significant statistical differences between Protocol and Overdenture groups regarding the following variables: comfort and retention; stability; prosthesis grade; esthetics; oral discomfort; functional restrictions; phonetics limitations; social limitations; and psychological discomfort (p > 0,050). Nevertheless, the group including patients treated with complete prostheses fixed by implants showed higher satisfaction scores compared to the group including patients treated with overdentures supported by implants (p = 0,049 < 0,05). In view of the oral health-related quality of life measured by OHIP-14, the overdenture group showed low impact considering functional limitation and low scores when comparing protocol group. There were no significant statistical differences in the intra-group comparisons (bar-clip retainer and individual retainer).
Caracterização das dimensões da aresta lateral de corte e do núcleo dos instrumentos Mtwo®, ProTaper®, Wizard Navigator® e BioRace®
(Universidade Federal de Goiás, 2015-03-10) Brito, Ana Paula Pedroso; Estrela, Carlos; http://lattes.cnpq.br/3611967334176683; Souza, João Batista de; http://lattes.cnpq.br/0642108682158061; Estrela, Carlos; Decúrcio, Daniel de Almeida; Guedes, Orlando Aguirre
Purpose: to determine flute-to-shank ratio of rotatory nickel-titanium instruments Mtwo® #30/.05, ProTaper® #30/.09, Wizard Navigator® #30/.06 and BioRace® 35/.04. Material and methods: Instruments’ diameter were measured with a digital caliper in the first five flutes and abraded longitudinally by a diamond disk until instrument half diameter was achieved in flutes region. The samples were then fixed in stubs and SEM images were performed at 60X magnification. The flutes and shanks areas were measured, and flute-toshank ratio was achieved using software AxioVision®. Statistical analysis was performed by ANOVA and Tukey’s Test for comparison between groups. Results: There was significant statistical difference for flutes areas. Mtwo® #30/.05 had the higher shank areas and was significantly different from the other instruments, except for Wizard Navigator #30/.06 ate the second flute site. Flute-to-shank ratio showed a 3-28% variation. Conclusions: Flutes dimensions were lower than shanks’. Wizard Navigator® #30/.05 had lower flute-to-shank ratio than other files.
Acurácia de três tomógrafos e um programa de redução de artefatos (e-Vol DX) na detecção de fraturas radiculares verticais
(Universidade Federal de Goiás, 2019-12-10) Caetano, Aline de Paula Ferreira; Sousa, Thiago Oliveira; http://lattes.cnpq.br/0132482031214690; Silva , Maria Alves Garcia Santos; http://lattes.cnpq.br/8760691456576488; Silva, Maria Alves Garcia Santos; Arruda, Karine Evangelista Martins; Rabelo, Luiz Eduardo Gregoris; Silva, Fernanda Paula Yamamoto; Porto, Olavo Cesar Lyra
Objective: To test the accuracy of three Cone Beam Computed Tomography (CBCT) devices and a CBCT imaging software with artifact reduction filters (e-Vol DX) in the diagnosis of vertical root fractures (VRF) in teeth without filling material, teeth with filling material and teeth with intracanal metallic post. Methods: 45 extracted human monoradicular premolars were divided into three groups according to the clinical condition concerning the root canal filling: 15 without filling material (WF), 15 with gutta-percha (GP) and 15 with intracanal metallic post (MP). The teeth were scanned on three different CT scanners (Kodak 9000® 3D, Orthopantomograph® 300 OP300 and PreXion 3D®) using the maximum resolution available in each device. Every tooth in the sample was artificially fractured and re-scanned under the same pattern. Two examiners evaluated the images using the InVivo (Anatomage) software and the e-Vol DX (CDT) software. The images were evaluated regarding the presence or absence of fracture using a five-point scale. In order to assess the method error, 30% of the images were re-evaluated after a minimum intermission of 15 days from the first evaluation. The intra and inter examiner concordances were obtained using the Kappa coefficient. Diagnostic tests determined the sensitivity, specificity and accuracy of the images of each CT scanner using both software. Results: The PreXion 3D® CT scanner was the most accurate in all evaluated groups (InVivo: 0.96; e-Vol DX: 0.92). In the WF and MP groups, the PreXion 3D® and OP300 CT scanners demonstrated equivalent accuracy when evaluated in InVivo software (WF: p = 0.2090; MP: p = 0.0950). There was no statistical difference between images analyzed with e-Vol DX (p = 0.8880). Conclusions: The PreXion 3D® CT scanner presents the best accuracy compared to the other CT scanners in both software. For the WF group, there is no difference between the PreXion 3D® and OP300 CT scanners regardless of the software used to evaluate the images. The Kodak 9000® 3D CT scanner presents lower accuracy in the tested groups. The e-Vol DX software does not contribute to a greater accuracy in the diagnosis of VRF.
Avaliação da influência do desgaste termomecânico nas propriedades mecânicas de fios ortodônticos de níquel-titânio termoativados
(Universidade Federal de Goiás, 2014-08-11) Camargo, Lívio Bráulio Silva e; Reges, Rogério Vieira; http://lattes.cnpq.br/9110996206785843; Lenza, Marcos Augusto; http://lattes.cnpq.br/0734929669869820; Lenza, Marcos Augusto; Nery, Cláudio Góis; Sakima, Maurício Tatsuei
To evaluate the influence of thermal and mechanical wear on the bending strength, topography and surface roughness of orthodontic NiTi wires Thermoset. Materials and Methods: round wire gauge section 0.018 "(0.045 mm) alloy NiTi (nickel titanium), thermoactivated (Dental Morelli, 3M/Abzil, American Orthodontics, Detsply GAC, Ormco) were selected. The samples were subjected to deflection test in a universal testing machine Instron 5965 model, and the atomic force microscope AFM model 5500, after being in thermocycled equipment Thermomechanical Wear Model ER 37000. Data were submitted to ANOVA statistical analysis and Tukey test, beyond the Spearman correlation coefficient with α = 0.05 significance. Results: By applying the deflection test at three points we observed that groups 1 and 4 matching results obtained, while the 2 and 3 equaled each other. The average force exerted by the wire was more pronounced in group 1 (control) than the rest. The wire Morelli which was developed as a higher average strength of the wire AO less developed for all groups. By AFM, the wires of Thermoset Abzil and AO presented the most striking defects and Morelli thermoactivated showed less surface irregularities. The other wires were equal in quantity and severity of surface topographical, changes Conclusion: The test deflection at three points proved to be very effective for the desired goals. Demonstrating the equivalence between the control group and the group that was subjected to thermo-mechanical wear. Wires subjected to for just one wear, thermal or mechanical, proved to release more linear force. All Thermoset wires studied andsubmitted to the AFM, showed irregularities on the surface, with no significant differences between groups. The wires had higher surface smoothness were those who developed higher levels of strength in the load-deflection graph.
Comparação entre implantes unitários de superfície tratada e não tratada por sub-tração radiográfica digital em protocolos de carga imediata e convencional
(Universidade Federal de Goiás, 2009-03-27) CARNEIRO, Luciano Sandoval; MENDONÇA, Elismauro Francisco de; http://lattes.cnpq.br/2305019128015847
Objectives: To compare by digital subtraction radiography (SR), matched to clinical evaluation, bone response to single-tooth treated (TS) and non-treated (NTS) surface implants on immediate (IM) and conventional (CO) loading protocols. Material and methods: 12 patients (8 underwent IM protocol and 4 underwent CO protocol) received 24 implants. Each subject received 2 implants (one with TS and the other NTS) homologously and bilaterally positioned in maxillae (lateral incisor, canine or premolar regions) or mandible (molar area). Standardized radiographies of each implant were taken on the day after implant placement (baseline image) and after 3, 6 and 12 months (follow-up images). SR was used for crestal bone loss (CBL) and peri-implant bone density (PIBD) measurements. The placement torque and resonance frequency (at 0, 6 and 12 months) were also measured for matching radiographic data. Results: T-test revealed no statistically significant difference in CBL between TS and NTS implants, while TS implants presented higher PIBD in the mid-implant region at 3-months recall (p = 0.04). For IM protocol, the Mann-Whitney test revealed higher CBL at 6-months follow-up (p = 0.03), greater PIBD at 12-months recall (p = 0.06; p = 0.07) and increasing PIBD through time. There was a positive correlation between primary stability and PIBD at 12-months recall (r = 0.58; p = 0.005). Conclusions: TS and NTS implants presented similar performances with regard to CBL and PIBD. IM and CO protocols were similarly successful. Primary stability was an important element in reaching greater PIBD after 1-year loading period
Sorção, solubilidade e resistência flexural biaxial de uma resina composta em função do tipo de fonte de luz e técnicas de polimerização
(Universidade Federal de Goiás, 2010-02-18) Carvalho, Andreia Assis; Lopes, Lawrence Gonzaga; http://lattes.cnpq.br/8698234314492960
The use of composite resin (CR) in dental restorations is a common practice, however, in the oral environment, these polymers are subject to hygroscopic and hydrolytic effects, and strength of occlusion and mastication. This study aimed to evaluate in vitro the influence of different light sources, energy densities and polymerization techniques on sorption, solubility and biaxial flexural strength (RFB) of an RC. 240 specimens were fabricated (2mm x 8 MMO) RC (Esthet-X), shade A2. Two groups were obtained, depending on the instrument used: halogen lamp and light emitting diodes (LED) and subdivided according to the energy density (16 J/cm2 and 20 J/cm2), polymerization (conventional pulse I stopped and interrupted pulse II) and type of permeant (water and ethanol 75%). The methodology for the development of sorption and solubility test was based on ISO 4049:2000. Then the specimens were tested for RFB (ASTM F 394-78). We used ANOVA and Tukey test for parametric data and Kruskal-Wallis and Mann-Whitney test for data nÃ£oparamÃ©tricos (? = 0.05). It was observed that in general there was no statistically significant differences when comparing the sources of light and the polymerization techniques (p> 0.05). Energy density of 16 J/cm2 and pulse interrupted technique II was possible to observe that the LED generated higher values of sorption and solubility of the halogen light and, in the conventional technique, lower RFB (p> 0.05 ). The ethanol produced higher values of sorption and solubility, and lower RFB compared with water. In general, light sources, energy densities and polymerization techniques did not influence the values of sorption, solubility and RFB
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.
Influência da composição monomérica e da presença de sal difenil-iodônio nas propriedades mecânicas de resinas experimentais reforçadas com fibras de vidro
(Universidade Federal de Goiás, 2017-03-31) Carvalho, Pedro Ivo de; Menezes, Murilo de Souza; http://lattes.cnpq.br/6878077505572368; Fonseca, Rodrigo Borges; http://lattes.cnpq.br/8629552867290605; Fonseca, Rodrigo Borges; Lopes, Lawrence Gonzaga; Lima, Adriano Fonseca de
Several researches aim to discover a best development of new glass-fiber-reinforced composite resins for the manufacture of intraradicular posts with better mechanical properties has been the aim of several researches lately. The reinforcement of composite resin with glass fibers can improve the mechanical properties, such as flexural strength, fracture resistance and compressive strength. Considering that the resin matrix monomers, the photoinitiator system and the interaction with the glass fibers interfere in the homogenization of the composite and in the degree of polymer conversion, the present work had as Objective: To evaluate the influence of different proportions of the monomers Bis-EMA / Bis-GMA / TEGDMA and photoactivator systems based on DFI and camphorquinone on the mechanical properties of a experimental fiberglass reinforced composite resin. Methodology: Ten groups were created (n = 10) using an experimental resin based on methacrylate, having as study factors: 1. Different matrices according to the proportions of monomers Bis-GMA (BG), TEGDMA (TE) and Bis-EMA (BE): And 2. The photoinitiator system: without DFI (SD) salt or DFI (CD) salt. The samples were prepared for the flexural strength (RF) and diametral tensile strength (RTD) tests. Statistical analysis showed that for RF (Mpa) there was significance in the interaction between the factors under study (p = 0.047). The highest result occurred for Group 10 (267.815 ± 45.05) c, followed by Group 9 (242.440 ± 44.83) bc; Group 8 (241.05 ± 44.83) b Group 3 (236.152 ± 26.42) abc. The lowest result occurred in Group 9 (192.450 ± 12.60) a, followed by Group 7 (202.35 ± 28.36) ab; Group 6 (207,240 ± 30,07) ab; Group 2 (209.530 ± 23.16) ab; Group 5 (216,760 ± 30,14); And Gruop 1 (218,880 ± 41,49). For RTD only the presence of DFI salt showed statistical significance (p = 0.001). The addition of the DFI salt in the composite significantly increased results for flexural strength and diametral tensile strength, while the increase of Bis-EMA was significant for better flexural strength results.

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