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Ocorrência de diferentes tipos de canais acessórios cavo inter-radiculares em molares de humanos. Estudo histológico / Ocurrence of different types of cavo inter-radicular accessory canals in human molars. A histologic study
Araraquara; s.n; 2006. 79 p. ilus, tab, graf.
Thesis in Pt | LILACS, BBO | ID: biblio-863679
Responsible library: BR39.2
Localization: BR39.2; Z96o
RESUMO
Apesar de haver muitos estudos que mostrem a prevalência e o diâmetro dos canais acessórios na região de furca, há escassez de trabalhos que observem o trajeto e os diferentes tipos de canais cavo inter-radiculares. Assim, o objetivo de nosso estudo foi verificar a ocorrência dos diferentes tipos morfológicos de canais acessórios na região de furca, na tentativa de mostrar os seus trajetos, através de cortes histológicos em molares de humanos. Foram utilizados 40 terceiros molares inferiores inclusos com separação radicular, os quais foram extraídos e descalcificados para a realização de microtomia no plano axial mésio-distal, obtendo-se cortes semi-seriados com espessura de 5µm. Os cortes foram corados com Hematoxilina e Eosina e observados em microscopia ótica em 40X, 100X, 200X e 400X. Os resultados mostraram que todos os tipos morfológicos foram encontrados, sendo que os canais acessórios verdadeiros, do tipo A estavam presentes em 10% dos espécimes. Os canais mais prevalentes foram os microcanais do tipo E, com prevalência de 100%, seguidos pelos fechados do tipo D com 87,5%, e pelos cegos do tipo B, com 75%. Os canais acessórios em alça, do tipo C, foram observados em apenas 5% dos dentes, sendo os menos prevalentes
ABSTRACT
Although there are several studies that show prevalence and diameter of accessory root canals in the furcation area, there is a scarceness of studies which observe the trajectory and different types of cavo inter-radicular canals. The objective of the present study was to verify the occurrence of different morphologic types of accessory root canals in the furcation area, in an attempt to show their trajectories, through histological sections in human molar teeth. Forty unerupted mandibular third molar teeth with radicular separation were used. They were extracted and decalcified so that microtomy could be performed towards mesio-distal axial plane, obtaining semi-serial sections with thickness of 5µm. The sections were stained with Hematoxylin and Eosin, and were observed under optical microscopy at 40X, 100X, 200X and 400X magnifications. The results showed that all morphologic types were found; the real accessory canals, type A, were present in 10% of the specimens. The most prevalent canals were type-E microcanals, with prevalence of 100%, followed by sealed type-D canals, with 87.5%, and by blind type-B canals, with 75%. The loop type-C accessory canals were observed in only 5% of the teeth, and were the least prevalent
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Full text: 1 Collection: 01-internacional Database: BBO / LILACS Main subject: Periodontal Ligament / Furcation Defects / Dental Pulp Cavity / Microtomy / Molar, Third Type of study: Screening_studies Limits: Humans Language: Pt Year: 2006 Document type: Thesis Country of publication: Brazil
Full text: 1 Collection: 01-internacional Database: BBO / LILACS Main subject: Periodontal Ligament / Furcation Defects / Dental Pulp Cavity / Microtomy / Molar, Third Type of study: Screening_studies Limits: Humans Language: Pt Year: 2006 Document type: Thesis Country of publication: Brazil