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The effect of curvature of simulated root canal and location of fragment on removal of broken file from simulated root canal / 华西口腔医学杂志
Article em Zh | WPRIM | ID: wpr-350272
Biblioteca responsável: WPRO
ABSTRACT
<p><b>OBJECTIVE</b>To evaluate effect of root canal curvature and location of the fragment on the removal of broken file from root canal.</p><p><b>METHODS</b>Sixty extracted mandibular premolars were divided equally into six groups according to location of fragment (2 mm or 8 mm below root canal orifice) and root canal curvature (20 degrees, 30 degrees or 40 degrees). Broken files were removed using ultrasonic tips combined with dental operating microscope. Number of successfully removed case and operating time were recorded. Pre- and post-operative digital radiographs were input into image analyzing software to calculate diameter variance of root canal at the level of tip of broken file.</p><p><b>RESULTS</b>All the 6 groups of broken files were successfully removed with out perforation. Among same fragment location groups, diameter variance was increased in greater curvature groups and the difference was significant (P < 0.05), while operation time was not significantly different (P > 0.05). Among same root canal curvature groups, the deeper the fragment, the longer operation time, difference being significant (P < 0.05), while difference of diameter variance was not significant (P > 0.05).</p><p><b>CONCLUSION</b>The more curvature of root canal, the more dentine removal amount at the level of broken file tip. Location of fragment has no effect on dentine removal amount. Safe straight-line access and adequate thickness of dentine are essential to removal of broken file from root canal.</p>
Assuntos
Texto completo: 1 Índice: WPRIM Assunto principal: Tratamento do Canal Radicular / Dente Pré-Molar / Preparo de Canal Radicular / Cavidade Pulpar / Dentina Limite: Humans Idioma: Zh Revista: West China Journal of Stomatology Ano de publicação: 2010 Tipo de documento: Article
Texto completo: 1 Índice: WPRIM Assunto principal: Tratamento do Canal Radicular / Dente Pré-Molar / Preparo de Canal Radicular / Cavidade Pulpar / Dentina Limite: Humans Idioma: Zh Revista: West China Journal of Stomatology Ano de publicação: 2010 Tipo de documento: Article