Programa de Pós-graduação em Odontologia

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    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.
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    Overdenture mandibular retida por implante unitário: desfechos clínicos, radriográficos e reportados pelo paciente após 5 anos de acompanhamento
    (Universidade Federal de Goiás, 2020-01-09) Coutinho, Paula Cristina; Nogueira, Túlio Eduardo; http://lattes.cnpq.br/5622401475518280; Leles, Cláudio Rodrigues; http://lattes.cnpq.br/6740286066154410; McKenna, Gerald John; Dias, Danilo Rocha; Leles, Cláudio Rodrigues
    Objective: To assess clinical, radiographic, and patient-reported outcomes of edentulous individuals rehabilitated with single-implant mandibular overdenture (SIMO) a 5-year follow-up period. Methods: A prospective clinical study was performed including edentulous individuals who received new conventional complete dentures and then an external hexagon implant (Neodent, Brazil) was placed in the mandibular midline region followed by the incorporation of a retention system (ball attachment/O'Ring, Neodent, Brazil). Data collection occurred at baseline and after 3, 6, 12, 24 and 60 months after implant loading. Outcomes included were implant stability, peri-implant soft tissue condition, periimplant marginal bone level, satisfaction with the dentures, and oral health- related quality of life impacts (OHRQoL). Also, clinical maintenance events related to the dentures were recorded. Descriptive statistics and Wilcoxon Signed Ranks Test were used for data analysis. Results: 30 out of 34 eligible participants attended the 5-year follow-up, mea age 68.1 years (SD = 7.8), 70% women. The overall implant survival rate was 95.3%. After 5 years, the OHRQoL showed a statistically significant difference between all evaluation periods compared to the baseline. There were no statistically significant differences regarding satisfaction with the maxillary prosthesis (p = 0.068) compared to the baseline period. Regarding satisfaction with the mandibular denture, there was a statistically significant difference between all evaluation periods, except for the 60-month evaluation (p = 0.213). There was an increase implant stability after 60 months and a decrease in periimplant bone level, but within expectations. The most frequent maintenance event was the O'ring matrix replacement (n = 80), followed by the repair of the denture base (n = 21). The most frequent intervention was replacement of the O'ring matrix (n = 80), followed by repair at the base of the prosthesis (n = 21). Besides, the peri-implant soft tissue condition remained stable. Conclusion: SIMO is effective in the long-term period considering the maintenance of the positive effect of the intervention in the patient-reported outcomes, the high implant survival rate, stable peri-implant condition and the occurrence of a usual number and type of maintenance events.
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    Efeito de diferentes momentos do selamento dentinário na resistência de união à dentina exposta à substâncias químicas auxiliares a endodontia
    (Universidade Federal de Goiás, 2020-03-03) Izelli, Thabata Frederico; Carvalho, Marco Aurélio de; http://lattes.cnpq.br/0482978464903802; Estrela, Carlos; http://lattes.cnpq.br/3611967334176683; Decurcio, Daniel de Almeida; Lazari, Priscilla Cardoso; Estrela, Carlos
    Chemical substances used in endodontic treatment can affect the quality of adhesion in the final restoration. The moment of dentin hybridization (HD) can act to minimize the effects of these substances on dentin and influence the quality of adhesion. This study evaluated the timing of HD and different chemical substances in dentin bond strength in human teeth. Twenty human molars were distributed in four experimental groups: G1. RD - direct restoration in composite resin, the control group being without exposure to chemical substances or temporary restoration; G2. HDT - late dentin hybridization with HD at the time of final restoration, after exposure to chemicals and temporary restoration; G3. HDI - immediate dentin hybridization with HD after simulation of endodontic treatment and prior to provisional restoration; G4. HDP - previous dentin hybridization with HD prior to exposure to chemical substances and temporary restoration. The coronary dentin was exposed, submerged with 2.5% sodium hypochlorite, 17% EDTA and endodontic cement, molded with addition silicone, temporarily restored, and stored for 2 weeks in artificial saliva. Then it was restored with composite resin and the microtensile test was performed after 24 hours. The toothpicks were cut to a size of 1mm² and subjected to microtraction at 0.05mm / min (MPa) in the universal testing machine. After assessing normality and homogeneity, the microtensile bond strength values ​​were analyzed using ANOVA, a 5% significance test, followed by a post hoc test (Tukey). The highest bond strength value was found in the control group (42.39 MPa ± 5.69), followed by the HDP group (41.51 MPa ± 3.68), the HDI group (21.16 MPa ± 9.66) and the lowest value in the HDT group (9.86 MPa ± 1.30). The control group (RD) showed no statistically significant difference in relation to the previous dentin hybridization (HDP) approach. The HDI and HDT groups showed a decrease in the tensile strength value when compared to the control group of 76.7% and 50.1%, respectively. It can be concluded that dentin hybridization prior to exposure to chemical substances used in endodontic treatment positively influenced the microtensile bond strength of the studied samples.
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    Análise do perfil epidemiológico, clínico e patológico de pacientes com líquen plano oral
    (Universidade Federal de Goiás, 2020-01-27) Lima, Sara Lia Gonçalves de; Arantes, Diego Antônio Costa; http://lattes.cnpq.br/8341286790648954; Batista, Aline Carvalho; http://lattes.cnpq.br/0199082642322002; Batista, Aline Carvalho; Mendonça, Elismauro Francisco de; Leite, Angélica Ferreira Oton; Costa, Nádia do Lago; Ferreira, Alexandre Bellotti
    INTRODUCTION: Oral lichen planus (OLP) is an immunomediated disease whose diagnosis and treatment can be challenging for clinicians and pathologists. OBJECTIVE: This case series aimed to evaluate the epidemiological, clinical and pathological profile of patients with OLP according to the criteria established by the American Academy of Oral and Maxillofacial Pathology (AAOMP/2016). METHODOLOGY: Sampling was initially established from the analysis of the annotations of the medical records and histopathological reports of patients diagnosed with OLP at the Centro Goiano de Doenças da Boca (CGDB) from 1998 to 2018. Subsequently, the clinical and demographic data of the patients lesions (location and clinical characteristics of the lesion) and the microscopic characterization of the specimens followed the criteria proposed by AAOMP / 2016. In addition, patients were invited to follow up and apply the Oral Health Impact Profile (OHIP-14) instrument to assess quality of life. Statistical analysis was descriptive with absolute and relative values and the Shapiro-Wilk test was used to assess the normality of the data collected in the OHIP-14 and then the groups were compared using the Mann-Whitney test. RESULTS: This case series (n=41) consisted mainly of women (n=29; 70.7%) with a mean age of 45 (±13.6) years. The buccal mucosa (68.2%) was the most affected site. Reticular (n=23; 56.1%) and erosive (n=14; 34.3%) OLP were the most frequent. According to OHIP-14, individuals with OLP at multiple sites of the oral cavity had worse values in the handicap domain (p=0.03). In addition, those patients who did not respond to corticosteroids had higher scores in the psychological discomfort domain (p=0.04). CONCLUSION: The findings of the present study using the AAOMP/2016 criteria are similar to other case series and retrospective studies reported in the literature, where OLP is more common in middle-aged women in reticular form. In addition, OLP, in its most severe clinical forms, seems to influence patients' quality of life.
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    A influência do tamanho do voxel em tomografia computadorizada de feixe cônico na detecção de perfurações radiculares usando um modelo in vitro
    (Universidade Federal de Goiás, 2013-09-22) Melo, Helen Cassia Patricia Gomes; Estrela, Carlos; http://lattes.cnpq.br/3611967334176683; Silva, Maria Alves Garcia Santos; http://lattes.cnpq.br/8760691456576488; Silva, Maria Alves Garcia Santos; Estrela, Carlos; Alencar, Ana Helena Gonçalves de; Paiva, Rogério Ribeiro de
    The aim of this study was to evaluate the influence of different voxel sizes in diagnostic capability beam computed tomography (CBCT) and compare the accuracy of conventional radiography with CBCT in detecting root perforations. Total of 30 intact third molars were simulated in which holes with diameters of 0.7 mm, 1.1 mm and 1.3 mm, realized in three steps. At each step the teeth were subjected to the process of acquiring images of periapical radiographs and CT scans. The periapical radiographs were performed using an apparatus Spectro 70X (Dabi Atlante, Ribeirão Preto, SP, Brazil) with 70 kVp and current 8mA. The CT scans were performed on four different types of equipment and two voxel sizes: i-Cat Cone Beam 3D Imaging System (Imaging Sciences International, Hatfiels, PA, USA) using voxels of 0.2 mm and 0.4 mm; Newton 3G [Dent-X (Elmsford, New York, USA)] with voxels 0.2 mm and 0.4 mm, Kodak 9000 (Eastman Kodak Company, USA) with voxels 0.076 mm and 0.4 mm and the Gendex GX CB 500 [Gendex Dental Systems (Hatfield, PA, USA)] with voxels of 0.2 mm and 0.4 mm. Six observers (three radiologists and three endodontists) evaluated the images separately using a scoring system: 1-change definitely not identified; 2 - probably not change identified; 3 - uncertainty whether the change has been identified or not; 4-change definitely found and 5-amendment probably found. The results were submitted to chi-square (2), and intra-and interobserver agreement was analyzed using Kappa. The level of significance was 5% (p <0,05). The results showed that CBCT had better performance than the conventional radiography for detecting simulated root perforations. Gendex devices, i-Cat and Kodak 9000 performed well with 0.2 mm voxel, but not performed well using the 0.4 mm voxel; Newton 3G performed well with both the 0.2 mm voxel as using the voxel of 0.4 mm can be used in a protocol voxel resolution of 0.4 mm, which combines image quality with less patient exposure to X-rays.