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Master's Dissertation
DOI
https://doi.org/10.11606/D.25.2022.tde-01092022-101855
Document
Author
Full name
German Diaz Espinoza
Institute/School/College
Knowledge Area
Date of Defense
Published
Bauru, 2022
Supervisor
Committee
Vivan, Rodrigo Ricci (President)
Alcalde, Murilo Priori
Duarte, Marco Antonio Hungaro
Silva, Guilherme Ferreira da
Title in English
Evaluation of the presence of lateral canals in lower molars by means of computed tomography: longitudinal study in a new software
Keywords in English
CBCT
Endodontics
Lateral canals
Abstract in English
In the present study, CBCT from the database of the Bauru Dental School was used. High resolution tomographic images of patients treated in the period between (2014 to 2019) were selected. For the evaluation of the images a computer equipped with a processor Intel Core 2 Duo-6300 with 1.86 GHz, an NVIDIA GeForce 6200 cache turbo graphics card and an EIZO-Flex scan S2000 monitor with a resolution of 1600 x 1200 pixels and Windows XP SP-2 professional was used. The sample number was 200 teeth divided into 2 groups for analysis: G1: 100 (e-Vol DX software, CDT software, Bauru, SP, Brazil) and G2: 100 (3D software Accuitomo 170 J. Morita, Kyoto, Japan) and for scanning the images, 1024 views were performed following the pattern: 3D, thickness of 0.100 mm, dimensions of 1.170 x 1.570 x 1.925 mm, field of view of 56.00 mm, voxel size of 0.100 mm and exposure time 33.5 seconds, the tube voltage will be 90 kVp and the tube current will be 4 mA. For the analysis of data regarding the location of the lateral canal in the mesial buccal root MBR in the cervical, middle and apical thirds for both the G1 software e-Vol DX and the G2 software 3D Accuitomo 170, the fisher exact test was used and for the location of the canal. lateral in the mesial lingual root LRM, and in the root DR in the cervical, middle, apical thirds were evaluated by chi-square test. In G1, it was possible to detect and locate the lateral canal with greater precision in the MBR in the cervical third (30.11%), in the LRM in the middle third (46.99%), and in the DR in the apical third (23.53%). In G2, the location of the lateral canal in the MBR was in the cervical third (3.45%), in the LRM in the middle third (10.20%), and in the DR in the apical third (13.64%). Using the e-Vol DX, it was analyzed that the distance from the MR of the LM1 in relation to the mandibular canal was 5.14 mm (standard deviation of 1.99), while from the DR to the mandibular canal it was 4.41 mm (standard deviation of 1.99). default of 1.98). As for the LM2, the MR showed an average distance of 3.32 mm in relation to the mandibular canal (standard deviation of 1.71 mm) and an average distance of 2.99 mm of the DR in relation to the mandibular canal (standard deviation of 1 .75 mm). In conclusion, the e-Vol DX software (Software CDT, Bauru, SP, Brazil) was able to more accurately and efficiently locate the presence of the lateral canal in both MBR, LRM and DR. In addition to locating the distance that exists between the MR and DR of the first and second permanent lower molars in relation to the mandibular canal.
Title in Portuguese
Avaliação da presença de canais laterais em molares inferiores por meio de tomografia computadorizada: estudo longitudinal em um novo software
Keywords in Portuguese
Canais laterais
Endodontia
TCFC
Abstract in Portuguese
No presente estudo se utilizaram TCFC do banco de dados da Faculdade de Odontologia de Bauru. Foram selecionadas imagens tomográficas com alta resolução de pacientes atendidos no período compreendido entre (2014 a 2019). A análise das imagens foi realizada em um computador equipado com um processador Intel Core 2 Duo-6300 de 1,86 GHz, uma placa de vídeo turbo de cache NVIDIA GeForce 6200 e um monitor EIZO-Flexscan S2000 com uma resolução de 1600 x 1200 pixels e Windows XP SP-2 profissional. Um total de 100 molares inferiores foi visualizado em 2 softwares diferentes, sendo G1: e-Vol DX, e G2: 3D Accuitomo 170 J Morita. Para o escaneamento das imagens se realizaram 1024 visualizações seguindo o padrão: 3D, espessura de 0,100 mm, dimensões de 1,170 x 1,570 x 1,925 mm, campo de visão de 56,00 mm, tamanho de voxel de 0,100 mm e tempo de exposição de 33,5 segundos, a voltagem do tubo será de 90 kVp e a corrente do tubo será de 4 mA. Para a análise de dados quanto a localização do canal lateral na raiz mesial vestibular RMV nos terços cervical, médio e apical tanto para o G1 software e-Vol DX quanto para G2 software 3D Accuitomo 170 foi utilizado o teste fisher exact e quanto localização do canal lateral na raiz mesial lingual RML, e na raiz RD nos terços cervical, médio, apical foram avaliados pelo teste chi-square. No G1 conseguiu-se detectar e localizar com maior precisão o canal lateral na RMV no terço cervical (30,11%), na RML no terço médio (46,99%), e na RD no terço apical (23,53%). No G2 a localização do canal lateral na RMV foi em terço cervical (3,45%), na RML no terço médio (10,20%), e na RD no terço apical (13,64%). Por meio do e-Vol DX foi analisado que a distância da RM dos 1MI em relação ao canal mandibular foi de 5,14mm (desvio padrão de 1,99), enquanto que da RD até o canal mandibular foi de 4,41mm (desvio padrão de 1,98). Quanto aos 2MI, a RM apresentou uma distância média de 3,32 mm em relação ao canal mandibular (desvio padrão de 1,71 mm) e uma distância média de 2,99 mm da RD em relação ao canal mandibular (desvio padrão de 1,75 mm). Em conclusão o software e-Vol DX (Software CDT, Bauru, SP, Brasil) foi capaz de localizar com maior precisão e eficacia a presença do canal lateral tanto na RMV, RML e RD. Além de localizar a distância que existe entre a RM e RD dos primeiros e segundos molares inferiores permanentes em relação ao canal mandibular.
 
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Release Date
2024-06-01
Publishing Date
2022-09-05
 
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