Micro-computed tomographic evaluation of the flow and filling ability of endodontic materials using different test models
Torres Fernanda Ferrari Esteves, Guerreiro-Tanomaru Juliane Maria, Chavez-Andrade Gisselle Moraima, Pinto Jader Camilo, Berbert Fabio Luiz Camargo Villela, Tanomaru-Filho Mario,
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( Torres Fernanda Ferrari Esteves ) - 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
( Chavez-Andrade Gisselle Moraima ) - 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
( Berbert Fabio Luiz Camargo Villela ) - 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: This study compared the flow and filling of several retrograde filling materials using new different test models.
Materials and Methods: Glass plates were manufactured with a central cavity and 4 grooves in the horizontal and vertical directions. Grooves with the dimensions used in the previous study (1 × 1 × 2 mm; length, width, and height respectively) were compared with grooves measuring 1 × 1 × 1 and 1 × 2 × 1 mm. Biodentine, intermediate restorative material (IRM), and mineral trioxide aggregate (MTA) were evaluated. Each material was placed in the central cavity, and then another glass plate and a metal weight were placed over the cement. The glass plate/material set was scanned using micro-computed tomography. Flow was calculated by linear measurements in the grooves. Central filling was calculated in the central cavity (mm3) and lateral filling was measured up to 2 mm from the central cavity.
Results: Biodentine presented the least flow and better filling than IRM when evaluated in the 1 × 1 × 2 model. In a comparison of the test models, MTA had the most flow in the 1 × 1 × 2 model. All materials had lower lateral filling when the 1 × 1 × 2 model was used.
Conclusions: Flow and filling were affected by the size of the test models. Higher grooves and materials with greater flow resulted in lower filling capacity. The test model measuring 1 × 1 × 2 mm showed a better ability to differentiate among the materials.
키워드
Dental materials; Endodontics; Methods; X-ray microtomography
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