FO - Faculdade de Odontologia
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Navegando FO - Faculdade de Odontologia por Por Orientador "Decurcio, Daniel de Almeida"
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Item Aplicação da tomografia computadorizada de feixe cônico na determinação do volume de tecido dentário removido na abertura coronária(Universidade Federal de Goiás, 2018-02-27) Chaves, Gustavo Silva; Silva, Julio Almeida; http://lattes.cnpq.br/1022830186974104; Decurcio, Daniel de Almeida; http://lattes.cnpq.br/4640062828556657; Decurcio, Daniel de Almeida; Estrela, Carlos; Figueiredo, José Antônio Poli deAim: to evaluate the use of CBCT to determine, in mm3 , the volume of dental tissue removed during endodontic access in human premolars. Materials and methods: For this analysis, CBCT was used in 20 teeth before and after endodontic access, performed with spherical and conical diamond burs. The CBCT used was I-CAT (Imaging Sciences International, Hatfield, PA, USA), with the following setup: 0.25 mm voxel, 13 cm FOV, 30s, 120 kVp and 3,8 mA current. DICOM images were loaded on two softwares, InVesalius® and Materialise Mimics/3-matic®. A 3D reconstruction of the tomography imagens was realized on both softwares, and it was calculated the initial (Vi) and final volume (Vf). The volume of removed tissue (Vr) was calculated through the formula: Vr = Vi – Vf. Results: The calculated data, for softwares Materialise and InVesalius, respectively, were: mean Vi of 441,79 ± 85,08mm3 and 442,01 ± 84,83mm3 ; mean Vf of 426,75 ±83,88mm3 and 426,94 ± 83,75mm3 ; mean Vr of 15,04 ± 4,32mm3 and 15,07 ± 4,16mm3 . No statistically significant diferences were found on the volume calculated on the different softwares in all measures, initial, final and removed. (p>0,05). However, there was a significant difference between the initial and final volume values calculated on the same software (p<0,05). Conclusion: CBCT is a tool that can be used to determine the volume of dental tissue removed during endodontic access, in vitro, associated with specific softwares for this purpose.Item Comparação do volume de tecido dental removido no acesso endodôntico guiado e convencional em incisivos inferiores(Universidade Federal de Goiás, 2019-02-21) Elias, Marcela Ramos Abrahão; Silva, Julio Almeida; http://lattes.cnpq.br/1022830186974104; Decurcio, Daniel de Almeida; http://lattes.cnpq.br/4640062828556657; Decurcio, Daniel de Almeida; Estrela, Carlos; Roriz, Virgílio MoreiraAim: To compare the volume of dental tissue removed in conventional and minimally invasive endodontic access with the use of prototyped endodontic guides, in extracted human mandibular incisors. Materials and methods: Twenty extracted healthy human mandibular incisors were submitted to the cone beam computed tomography (CBCT) exam before and after endodontic access. The teeth were divided into two groups, according to the type of access: group 1 (G1) conventional access (n = 10) and group 2 (G2) minimally invasive access (n = 10). For G2, prototyped guides were made in 3D printer through the association of the image of the CBCT with the digital scanning of the teeth. The evaluation of the volume of dental tissue was performed by transferring the images in the DICOM format to the InVesalius® software, in which three-dimensional (3D) reconstruction of tomography sections was performed. Based on the initial volume (Vi) and final volume (Vf), the volume of tissue removed (Vr) was calculated by the formula: Vr = Vi - Vf. Results: There was no difference in Vi (p = 0.589) and Vf comparisons (p = 0.724) between groups. The mean dental volume removed at the conventional access and minimally invasive were respectively 31.677 mm 3 and 26.523 mm 3 . There was a mean volume reduction of 10.62% in the conventional access and 10.65% in the minimally invasive access, with no significant difference between the groups (p = 0.960). Conclusion: There was no significant difference in the volume of dental tissue removed when compared to conventional and minimally invasive endodontic access in extracted human mandibular incisors.Item Análise comparativa do volume de tecido dental removido no acesso endodôntico convencional e guiado em molares superiores(Universidade Federal de Goiás, 2019-02-22) Loureiro, Marco Antonio Zaiden; Siqueira, Patricia Correia de; http://lattes.cnpq.br/1916908532016188; Decurcio, Daniel de Almeida; http://lattes.cnpq.br/4640062828556657; Estrela, Carlos; Alencar, Ana Helena Gonçalves de; Decurcio, Daniel de AlmeidaObjective: To compare the volume of dental tissue removed after guided and conventional endodontic access in maxillary molars. Material and Method: Twenty first and second upper human extracted molars were selected and submitted to cone beam computed tomography (CBCT). The teeth were divided into two groups: conventional endodontic access (G1) and guided endodontic access (G2). The DICOM files obtained by the CBCT examination were transferred to InVesalius® software to calculate the initial volume (IV) of each tooth. The teeth of the G2 were scanned with the 3SHAPE® device for the planning of the guides, and the same ones printed in Straumann® CARES® P30 3D printer. The accesses in the G1 group were realized with spherical diamond tips and Endo Z drill in high rotation, and in group G2 spherical diamond tips were used in high rotation and drills of 1,3mm in engine of implantology. New CBCT tests were performed after the endodontic accesses to calculate the final volume of each sample unit (FV). The volume of dental tissue removed (VR) was calculated by the formula: VR = IV-FV. Volumes between groups were compared by Student's T-test for independent samples. Results: There was a mean volume reduction of 62.526 mm³ (5.86%) in conventional access and 45.677 mm³ (4.11%) in guided access, with difference between groups (p = 0.004). Conclusion: Guided endodontic access in extracted human upper molars preserves a larger volume of dental tissue when compared to conventional endodontic access.Item O tratamento radioterápico altera a condição pulpar de dentes de pacientes com câncer de cabeça e pescoço? Uma revisão sistemática(Universidade Federal de Goiás, 2022-03-03) Ribeiro, Thalles Eduardo; Novais, Veridiana Resende; http://lattes.cnpq.br/4383958389503132; Decurcio, Daniel de Almeida; http://lattes.cnpq.br/4640062828556657; Decurcio, Daniel de Almeida; Alencar, Ana Helena Gonçalves de; Caldeira, Celso LuizObjective: This study aims to identify possible changes in pulp behavior during radiotherapy and follow-up periods in patients with head and neck cancer. Purpose: The main purpose of this study was to answer the question: “Radiotherapy can cause changes in the pulp condition of teeth of irradiated patients in the head and neck region during treatment?”. Material and Method: Clinical Observational Studies in adults with Head and Neck Cancer undergoing treatment with ionizing radiation, with longitudinal or cross-sectional follow-up to measure SpO2 and/or pulp sensitivity to cold stimulation, were determined as eligible studies. Literature Review, Case Reports, Abstracts, Opinion Articles, Letters to the Editor, and studies with in vitro methodology were excluded. A systematic literature search was carried out in six different databases until September 2021, including the “grey literature” and the search in the references of the selected studies. Two independent evaluators selected the studies, extracted the data and recorded them in electronic spreadsheets, and evaluated the methodological quality using the JBI tool, Checklist for Quasi-Experimental Studies. Data were qualitatively assessed using the Synthesis Without Metaanalysis (SWiM) guidelines. Results: After removing duplicate articles and careful analysis of title, abstracts, and full reading of the papers, seven studies were included; of these, four were carried out in Brazil and three in India, with participants from both genders. Of the studies evaluated, four used the Cold Sensitivity Test, followed by two that associated Pulse Oximetry and Cold Sensitivity, and one evaluated only the Pulse Oximetry. The evaluation in the initial periods to radiotherapy, both with the Cold Sensitivity Test and Pulse Oximetry, showed a decrease in the sensitive response and in the levels of SpO2, with a maximum period of 1 year. However, for later analyses, from 5 to 6 years after the end of radiotherapy treatment, there was normalization of the responses of both tests. Most studies presented Methodological Quality as High. Also, most studies do not detail the type of ionizing radiation used in the article, and implications for the studies' clarity can be considered a limitation. Conclusion: It can be concluded that radiotherapy causes changes in pulp behavior patterns in the short term; however, there is recovery and return to average values after long periods. This Systematic Review followed the 2020 PRISMA guidelines, and its9 protocol was registered on the PROSPERO platform before it began with the number CRD42021276338.Item A irradiação da estrutura dentária modifica o resultado da saturação de oxigênio aferida pelo oxímetro de pulso?(Universidade Federal de Goiás, 2022-03-03) Santana, Maria Luiza Lima; Silva, Julio Almeida; http://lattes.cnpq.br/1022830186974104; Decurcio, Daniel de Almeida; http://lattes.cnpq.br/4640062828556657; Decurcio, Daniel de Almeida; Estrela, Carlos; Simamoto, Veridiana Resende NovaisObjective: To evaluate the interference of dental structure ionizing radiation in measuring finger oxygen saturation by a pulse oximeter. Materials and method: Fifty-four extracted human third molars were sectioned mesiodistally to obtain the buccal and palatal/lingual surfaces standardized in 4,0mm of thickness, involving enamel and dentin structure. The initial measurement of oxygen saturation (SaO2) and heart rate (bpm) of the little finger of the participant's hand, at rest, was performed using the portable pediatric pulse oximeter BCI 3301 (positive control before ionizing radiation). As a negative control, oxygen saturation was measured with the faces of the teeth juxtaposed to each other. Next, the faces of the teeth were fixed parallel to the pulse oximeter diodes and interposed between the participant's minimum and the pulse oximeter diodes for pre-irradiation data collection. For this, an additional silicone mold was used to fix the pulse oximeter diodes to be parallel and set in a vise-type vise. The recording of SaO2 was carried out in the presence and absence of ambient light. Afterward, the sample received the ionizing radiation in a fractional form, from 2Gy daily, 5 days a week, for 7 weeks, up to 70Gy. For post-irradiation evaluation, a new positive control was performed and then the measurement of SaO2 values was performed following the protocol previously described. The Kolmogorov Smirnov test analyzed the normality relationship of the quantitative variables described through the mean and standard deviation. To compare the mean values of oxygen saturation before and after irradiation, in the presence and absence of light, the Student's t-test for paired samples was used. A 95% confidence interval and a 5% significance level were considered. Results: The mean values of SaO2 in the positive controls were 96.95±0.6% in the presence of light and 96.85±0.7% in the absence of light. For the analysis of SaO2 before irradiation, mean values of 94.7±0.6% were obtained in the presence of light and 93.2±1.3% in the absence of light, with a significant reduction in these values compared to positive pre-irradiation controls (p<0.001). After irradiation, the mean SaO2 value was 94.6±0.9% in the presence of light, with no statistically significant difference (p=0.623) when compared to the pre-irradia tion value, while in the absence of light the value mean of SaO2 was 93.7±0.9%, with a statistical difference when compared to before irradiation (p=0.024). Conclusion: The change in tooth structure caused by ionizing radiation does not interfere with pulse oximeter measurement in the presence of light. Although light influences pulse oximeter results, its difference does not represent clinical relevance.