Artigo Acesso aberto Produção Nacional Revisado por pares

Influence of apical foramen lateral opening and file size on cemental canal instrumentation

2012; Fundação Odontológica de Ribeirão Preto; Volume: 23; Issue: 2 Linguagem: Inglês

10.1590/s0103-64402012000200006

ISSN

1806-4760

Autores

Ronaldo Araújo Souza, Yara Teresinha Corrêa Silva‐Sousa, José Antônio Poli de Figueiredo, João da Costa Pinto Dantas, Suely Colombo, Jesus Djalma Pécora,

Tópico(s)

Drilling and Well Engineering

Resumo

Since instrumentation of the apical foramen has been suggested for cleaning and disinfection of the cemental canal, selection of the file size and position of the apical foramen have challenging steps. This study analyzed the influence of apical foramen lateral opening and file size can exert on cemental canal instrumentation. Thirty-four human maxillary central incisors were divided in two groups: Group 1 (n=17), without flaring, and Group 2 (n=17), with flaring with LA Axxess burs. K-files of increasing diameters were progressively inserted into the canal until binding at the apical foramen was achieved and tips were visible and bonded with ethyl cyanoacrylate adhesive. Roots/files set were cross-sectioned 5 mm from the apex. Apices were examined by scanning electron microscopy at ×140 and digital images were captured. Data were analyzed statistically by Student’s t test and Fisher’s exact test at 5% significance level. SEM micrographs showed that 19 (56%) apical foramina emerged laterally to the root apex, whereas 15 (44%) coincided with it. Significantly more difficulty to reach the apical foramen was noted in Group 2. Results suggest that the larger the foraminal file size, the more difficult the apical foramen instrumentation may be in laterally emerged cemental canals.

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