المؤلفون: PINTO, Jáder Camilo, PIVOTO-JOÃO, Mariana Mena Barreto, ESPIR, Camila Galetti, RAMOS, Maria Luiza Gioster, GUERREIRO-TANOMARU, Juliane Maria, TANOMARU-FILHO, Mario

المصدر: Journal of Applied Oral Science. January 2019 27

مصطلحات موضوعية: Dental pulp cavity, Root canal preparation, Dental instruments, X-ray computed tomography

الوصف: Objective The aim of this study was to evaluate the root canal preparation and apical enlargement of molar root canals with rotary or reciprocating heat-treated nickel-titanium (NiTi) instruments, by using micro-computed tomography (micro-CT). Methodology Mesial root canals (n=48) of mandibular molars, with a curvature between 20° and 40°, were prepared with ProDesign Logic (PDL) 25.01 and 25.06 in rotary motion, or ProDesign R (PDR) 25.06 in reciprocating motion (PDR). Apical enlargement was performed with PDL35.01 and PDL35.05 or PDR35.05. Scanning with 9 µm resolution was performed before and after preparation, and, after apical enlargement, by using micro-CT. The percentage of volume increase, debris and untouched root canal surface, transportation, centralization and preparation time were analyzed. ANOVA and Tukey or Kruskall-Wallis and Dunn statistical tests were conducted (α=.05). Results PDL promoted a higher apical percentage of volume increase, and lower percentage of debris and untouched root canal surface than PDR 25.06 preparation in entire canal and in all thirds (P<.05). Apical enlargement with PDL 35.05 and PDR 35.05 produced a higher percentage of volume increase in the apical region in relation to the initial preparation (P<.05). PDR 35.05 and PDL 35.05 showed similar results in relation to percentage of debris and untouched root canal surface in entire canal and in all thirds (P>.05). Centralization and transportation showed no difference (P>.05). PDR required less time to perform preparation and apical enlargement (P<.05). Conclusions The apical enlargement 35.05 with CM heat-treatment instruments using reciprocating and rotary motion reduced the percentage of debris and untouched root canal surface, without causing deviations or procedural errors. The protocol of greater apical enlargement favors the cleaning of the root canals in both kinematics. Preparation by the reciprocating system was faster than by the rotary system.

وصف الملف: text/html

الوصول الحر: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572019000100469Test

المؤلفون: Paes, Adriana da Silva Ferreira, Moreira, Carla Ruffeil, Sales, Marcelo Augusto Oliveira, Cavalcanti, Marcelo Gusmão Paraíso

المصدر: Journal of Applied Oral Science. June 2007 15(3)

مصطلحات موضوعية: X-ray computed tomography, Dental Implants, Mandibular nerve

الوصف: OBJECTIVE: The purpose of this study was to evaluate the accuracy of relative measurements from the roof of the mandibular canal to the alveolar crest in multislice (multidetector) computed tomography (MDCT) and single-slice computed tomography (SSCT). MATERIAL AND METHODS: The sample consisted of 26 printed CT films (7 SSCT and 19 MDCT) from the files of the LABI-3D (3D Imaging Laboratory) of the School of Dentistry of the University of São Paulo (FOUSP), which had been acquired using different protocols. Two observers analyzed in a randomized and independent order a series of 22 oblique CT reconstructions of each patient. Each observer analyzed the CT scans twice. The length of the mandibular canal and the distance between the mandibular canal roof and the crest of the alveolar ridge were obtained. Dahlberg test was used for statistical analysis. RESULTS: The mean error found for the mandibular canal length measurements obtained from SSCT was 0.53 mm in the interobserver analysis, and 0.38 mm for both observers. On MDCT images, the mean error was 0.0 mm in the interobserver analysis, and 0.0 and 0.23 mm in the intraobserver analysis. Regarding the distance between the mandibular canal roof and the alveolar bone crest, the SSCT images showed a mean error of 1.16 mm in the interobserver analysis and 0.66 and 0.59 mm in the intraobserver analysis. In the MDCT images, the mean error was 0.72 mm in the interobserver analysis and 0.50 and 0.54 mm in the intraobserver analysis. CONCLUSION: Multislice CT was demonstrated a more accurate method and demonstrated high reproducibility in the analysis of important anatomical landmarks for planning of mandibular dental implants, namely the mandibular canal pathway and alveolar crest height.

وصف الملف: text/html

الوصول الحر: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572007000300012Test

المؤلفون: Santos, Denise Takehana dos, Oliveira, Jefferson Xavier, Vannier, Michael Walter, Cavalcanti, Marcelo Gusmão Paraíso

المصدر: Journal of Applied Oral Science. April 2007 15(2)

مصطلحات موضوعية: Orbital fractures, X-ray computed tomography, Computer-assisted diagnosis

الوصف: OBJECTIVE: The objective of this study was to demonstrate the sensitivity and specificity of multislice computed tomography (CT) for diagnosis of orbital fractures following different protocols, using an independent workstation. MATERIALS AND METHODS: CT images of 36 patients with maxillofacial fractures (symptomatic to orbit region) who were submitted to multislice CT scanning were analyzed, retrospectively. The images were interpreted based on 5 protocols, using an independent workstation: 1) axial (original images); 2) multiplanar reconstruction (MPR); 3) 3D images; 4) association of axial/MPR/3D images and 5) coronal images. The evaluated anatomical sites were divided according to the orbital walls: lateral (with or without zygomatic frontal process fracture); medial; superior (roof) and inferior (anterior, medial). The collected data were analyzed statistically using a validity test (Youden's J index; p<0.05). The clinical and/or surgical findings (medical records) were considered as the gold standard to corroborate the diagnosis of the anatomical localization of the orbital fracture. RESULTS: 3D-CT scanning presented sensitivity of 78.9%, which was not superior to that of MPR (84.0%), axial/MPR/3D (90.5%) and coronal images (86.1%). On the other hand, the diagnostic value of axial images was considered limited for orbital fractures region, with sensitivity of 44.2%. CONCLUSIONS: Except for the axial images, which presented a low sensitivity, all methods evaluated in this study showed high specificity and sensitivity for the diagnosis of orbital fractures according to the proposed methodology. This protocol can add valuable information to the diagnosis of fractures using the association of axial/MPR/3D with multislice CT.

وصف الملف: text/html

الوصول الحر: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572007000200012Test

المؤلفون: Adriana da Silva Ferreira Paes, Carla Ruffeil Moreira, Marcelo Augusto Oliveira Sales, Marcelo Gusmão Paraíso Cavalcanti

المصدر: Journal of Applied Oral Science, Vol 15, Iss 3, Pp 220-224 (2007)

مصطلحات موضوعية: X-ray computed tomography, Dental Implants, Mandibular nerve, Dentistry, RK1-715

الوصف: OBJECTIVE: The purpose of this study was to evaluate the accuracy of relative measurements from the roof of the mandibular canal to the alveolar crest in multislice (multidetector) computed tomography (MDCT) and single-slice computed tomography (SSCT). MATERIAL AND METHODS: The sample consisted of 26 printed CT films (7 SSCT and 19 MDCT) from the files of the LABI-3D (3D Imaging Laboratory) of the School of Dentistry of the University of São Paulo (FOUSP), which had been acquired using different protocols. Two observers analyzed in a randomized and independent order a series of 22 oblique CT reconstructions of each patient. Each observer analyzed the CT scans twice. The length of the mandibular canal and the distance between the mandibular canal roof and the crest of the alveolar ridge were obtained. Dahlberg test was used for statistical analysis. RESULTS: The mean error found for the mandibular canal length measurements obtained from SSCT was 0.53 mm in the interobserver analysis, and 0.38 mm for both observers. On MDCT images, the mean error was 0.0 mm in the interobserver analysis, and 0.0 and 0.23 mm in the intraobserver analysis. Regarding the distance between the mandibular canal roof and the alveolar bone crest, the SSCT images showed a mean error of 1.16 mm in the interobserver analysis and 0.66 and 0.59 mm in the intraobserver analysis. In the MDCT images, the mean error was 0.72 mm in the interobserver analysis and 0.50 and 0.54 mm in the intraobserver analysis. CONCLUSION: Multislice CT was demonstrated a more accurate method and demonstrated high reproducibility in the analysis of important anatomical landmarks for planning of mandibular dental implants, namely the mandibular canal pathway and alveolar crest height.

وصف الملف: electronic resource

العلاقة: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572007000300012Test; https://doaj.org/toc/1678-7757Test; https://doaj.org/toc/1678-7765Test

الوصول الحر: https://doaj.org/article/a4e7d3b6d5ff499db76b45092d2fdb7fTest

المؤلفون: Denise Takehana dos Santos, Jefferson Xavier Oliveira, Michael Walter Vannier, Marcelo Gusmão Paraíso Cavalcanti

المصدر: Journal of Applied Oral Science, Vol 15, Iss 2, Pp 135-139 (2007)

مصطلحات موضوعية: Orbital fractures, X-ray computed tomography, Computer-assisted diagnosis, Dentistry, RK1-715

الوصف: OBJECTIVE: The objective of this study was to demonstrate the sensitivity and specificity of multislice computed tomography (CT) for diagnosis of orbital fractures following different protocols, using an independent workstation. MATERIALS AND METHODS: CT images of 36 patients with maxillofacial fractures (symptomatic to orbit region) who were submitted to multislice CT scanning were analyzed, retrospectively. The images were interpreted based on 5 protocols, using an independent workstation: 1) axial (original images); 2) multiplanar reconstruction (MPR); 3) 3D images; 4) association of axial/MPR/3D images and 5) coronal images. The evaluated anatomical sites were divided according to the orbital walls: lateral (with or without zygomatic frontal process fracture); medial; superior (roof) and inferior (anterior, medial). The collected data were analyzed statistically using a validity test (Youden's J index; p

وصف الملف: electronic resource

العلاقة: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572007000200012Test; https://doaj.org/toc/1678-7757Test; https://doaj.org/toc/1678-7765Test

الوصول الحر: https://doaj.org/article/a6f300faee2f45bc918176f1bd7ea35fTest

المؤلفون: Marcelo Augusto Oliveira de Sales, Carla Ruffeil Moreira, Adriana da Silva Ferreira Paes, Marcelo Gusmão Paraiso Cavalcanti

المصدر: Journal of Applied Oral Science
Journal of Applied Oral Science v.15 n.3 2007
Journal of applied oral science
Universidade de São Paulo (USP)
instacron:USP
Journal of Applied Oral Science, Volume: 15, Issue: 3, Pages: 220-224, Published: JUN 2007
Journal of Applied Oral Science, Vol 15, Iss 3, Pp 220-224 (2007)

مصطلحات موضوعية: X-ray computed tomography, Dental Implants, Mandibular nerve, Reproducibility, business.industry, Mandibular canal, Dentistry, Multislice computed tomography, lcsh:RK1-715, medicine.anatomical_structure, lcsh:Dentistry, medicine, Alveolar ridge, Crest, Multislice, Original Article, Nuclear medicine, business, General Dentistry, Dental alveolus

الوصف: OBJECTIVE: The purpose of this study was to evaluate the accuracy of relative measurements from the roof of the mandibular canal to the alveolar crest in multislice (multidetector) computed tomography (MDCT) and single-slice computed tomography (SSCT). MATERIAL AND METHODS: The sample consisted of 26 printed CT films (7 SSCT and 19 MDCT) from the files of the LABI-3D (3D Imaging Laboratory) of the School of Dentistry of the University of São Paulo (FOUSP), which had been acquired using different protocols. Two observers analyzed in a randomized and independent order a series of 22 oblique CT reconstructions of each patient. Each observer analyzed the CT scans twice. The length of the mandibular canal and the distance between the mandibular canal roof and the crest of the alveolar ridge were obtained. Dahlberg test was used for statistical analysis. RESULTS: The mean error found for the mandibular canal length measurements obtained from SSCT was 0.53 mm in the interobserver analysis, and 0.38 mm for both observers. On MDCT images, the mean error was 0.0 mm in the interobserver analysis, and 0.0 and 0.23 mm in the intraobserver analysis. Regarding the distance between the mandibular canal roof and the alveolar bone crest, the SSCT images showed a mean error of 1.16 mm in the interobserver analysis and 0.66 and 0.59 mm in the intraobserver analysis. In the MDCT images, the mean error was 0.72 mm in the interobserver analysis and 0.50 and 0.54 mm in the intraobserver analysis. CONCLUSION: Multislice CT was demonstrated a more accurate method and demonstrated high reproducibility in the analysis of important anatomical landmarks for planning of mandibular dental implants, namely the mandibular canal pathway and alveolar crest height.

وصف الملف: text/html

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f51d5063ac4d71acf654665c516f904fTest
http://europepmc.org/articles/PMC4327470Test

المؤلفون: Jáder Camilo PINTO, Mariana Mena Barreto PIVOTO-JOÃO, Camila Galetti ESPIR, Maria Luiza Gioster RAMOS, Juliane Maria GUERREIRO-TANOMARU, Mario TANOMARU-FILHO

المصدر: Journal of Applied Oral Science, Vol 27

مصطلحات موضوعية: Dental pulp cavity, Root canal preparation, Dental instruments, X-ray computed tomography, Dentistry, RK1-715

الوصف: Abstract Objective The aim of this study was to evaluate the root canal preparation and apical enlargement of molar root canals with rotary or reciprocating heat-treated nickel-titanium (NiTi) instruments, by using micro-computed tomography (micro-CT). Methodology Mesial root canals (n=48) of mandibular molars, with a curvature between 20° and 40°, were prepared with ProDesign Logic (PDL) 25.01 and 25.06 in rotary motion, or ProDesign R (PDR) 25.06 in reciprocating motion (PDR). Apical enlargement was performed with PDL35.01 and PDL35.05 or PDR35.05. Scanning with 9 µm resolution was performed before and after preparation, and, after apical enlargement, by using micro-CT. The percentage of volume increase, debris and untouched root canal surface, transportation, centralization and preparation time were analyzed. ANOVA and Tukey or Kruskall-Wallis and Dunn statistical tests were conducted (α=.05). Results PDL promoted a higher apical percentage of volume increase, and lower percentage of debris and untouched root canal surface than PDR 25.06 preparation in entire canal and in all thirds (P.05). Centralization and transportation showed no difference (P>.05). PDR required less time to perform preparation and apical enlargement (P

وصف الملف: electronic resource

العلاقة: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572019000100469&lng=en&tlng=enTest; https://doaj.org/toc/1678-7765Test

الوصول الحر: https://doaj.org/article/c90f91315061472380de810155da3aa6Test