Internal Lower Incisor Morphology revealed by Computerized Microtomography.

Abstract

This study evaluated the internal morphology of lower incisors using computerized microtomography (micro-CT) images. Eighty-nine lower incisors were scanned by micro-CT and reconstructed with NRecon software. 2D parameters (perimeter, root length, circularity and canal diameter) and 3D parameters (volume, surface area and structure model index) were evaluated with CTAn and CTVol software. The results are presented descriptively. It was found that 89.9% of the canals had a single main root canal (type I), followed by type II (6.7%) and III (3.4%), while 5.6% of the specimens presented lateral canals and 1.1% had an apical delta. Mean volume and surface area were 31.80mm³ and 90.58mm², respectively. The most prevalent shape of the root canal at CEJ level was circular (41.6%) and 1mm from the apex, 73% of the samples were classified as oval. Lower incisors with internal anatomical variations may offer a high degree of technical complexity and may result in treatment failure.

Manejo Cirúrgico Odontológico De Pacientes Que Usam Anticoagulantes E Antiagregantes Plaquetários

“…O estudo de Wang et al, (2018) apresentou os canais radiculares dos incisivos inferiores geralmente como largos no sentido vestíbulo-lingual, com deposição de dentina secundária em canais em forma de fita resultando na formação de partições, que podem causar canais ramificados. Entretanto, Lima et al, (2020) relata que presença de um canal acessório, um ramo que sai do canal principal e se comunica com o a superfície externa da raiz, um delta apical e outros possíveis forames apicais facilitam a passagem dos irrigantes pulpares para o periodonto e, caso não tenha uma correta limpeza por completo, podem levar ao insucesso do tratamento.…”

Probióticos Podem Prevenir Cárie Dentária Na Primeira Infância?

“…Entre as variações de anatomia interna, a mais frequentes é formato do canal radicular, que é um dos pontos mais importantes para determinação de complexidade do tratamento, dentre eles encontra-se canais arredondados, ovais, ovais longos e em HAN et al, 2014;KAMTANE et al, 2016;LIMA et al, 2020).…”

Influence of Apical Diameter on Filling Material Extrusion during Retreatment - A Micro-CT and CBCT evaluation

“…The structural model index (SMI) values was used to select cylindrical canals. When the SMI was close to 3, it was considered cylindrical 17 , 18 . The volume of the root canals in the last 12 mm was calculated using CTAn v. 1.12 software (Bruker-microCT), and the normality of the sample was determined using the Shapiro-Wilk test for normality (p = 0.248).…”