A micro-computed tomographic study using a novel test model to assess the filling ability and volumetric changes of bioceramic root repair materials
Torres Fernanda Ferrari Esteves, Pinto Jader Camilo, Figueira Gabriella Oliveira, Guerreiro-Tanomaru Juliane Maria, Tanomaru-Filho Mario,
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( Torres Fernanda Ferrari Esteves ) - Sao Paulo State University School of Dentistry Department of Restorative Dentistry
( Pinto Jader Camilo ) - Sao Paulo State University School of Dentistry Department of Restorative Dentistry
( Figueira Gabriella Oliveira ) - Sao Paulo State University School of Dentistry Department of Restorative Dentistry
( Guerreiro-Tanomaru Juliane Maria ) - Sao Paulo State University School of Dentistry Department of Restorative Dentistry
( Tanomaru-Filho Mario ) - Sao Paulo State University School of Dentistry Department of Restorative Dentistry
Abstract
Objectives: New premixed bioceramic root repair materials require moisture for setting. Using micro-computed tomography (micro-CT), this study evaluated the filling ability and volumetric changes of calcium silicate-based repair materials (mineral trioxide aggregate repair high-plasticity [MTA HP] and Bio-C Repair, Angelus), in comparison with a zinc oxide and eugenol-based material (intermediate restorative material [IRM]; Dentsply DeTrey).
Materials and Methods: Gypsum models with cavities 3 mm deep and 1 mm in diameter were manufactured and scanned using micro-CT (SkyScan 1272. Bruker). The cavities were filled with the cements and scanned again to evaluate their filling capacity. Another scan was performed after immersing the samples in distilled water for 7 days to assess the volumetric changes of the cements. The statistical significance of differences in the data was evaluated using analysis of variance and the Tukey test with a 5% significance level.
Results: Bio-C Repair had a greater filling ability than MTA HP (p < 0.05). IRM was similar to Bio-C and MTA HP (p > 0.05). MTA HP presented the largest volumetric change (p < 0.05), showing more volume loss than Bio-C and IRM, which were similar (p > 0.05).
Conclusions: Bio-C Repair is a new endodontic material with excellent filling capacity and low volumetric change. The gypsum model proposed for evaluating filling ability and volumetric changes by micro-CT had appropriate and reproducible results. This model may enhance the physicochemical evaluation of premixed bioceramic materials, which need moisture for setting.
키워드
Biocompatible materials; Endodontics; Methods; X-ray microtomography
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