Cuddihy, M;Gorman, CM;Burke, FM;Ray, NJ;Kelliher, D

2013

June

Dental Materials

Endodontic access cavity simulation in ceramic dental crowns

Validated

WOS: 6 ()

FINITE-ELEMENT-ANALYSIS RESTORATIONS MOLARS TEETH

29

626

634

Objectives. It is proposed that a non-uniform rational B-spline (NURBS) based solid geometric model of a ceramic crown would be a flexible and quick approach to virtually simulate root canal access cavities. The computation of strain components orthogonal to surface flaws generated during the drilling would be an appropriate way of comparing different access cavity configurations. Methods. A mu CT scan is used to develop a full 3D NURBS geometric solid model of a ceramic crown. Three different access cavity configurations are created virtually in the geometric model and there are then imported into proprietary finite element software. A linear analysis of the each crown is carried out under appropriate in vivo loading and the results are post-processed to carry out a quantitative comparison of the three configurations Results. The geometric model is shown to be a flexible and quick way of simulation access cavities. Preliminary indications are that post processed strain results from the finite element analysis are good comparators of competing access cavity configurations. Significance. The generation of geometric solid models of dental crowns from mu CT scans is a flexible and efficient methodology to simulate a number of access cavity configurations. Furthermore, advanced post-processing of the primary finite element analysis results is worthwhile as preliminary results indicate that improved quantitative comparisons between different access cavity configurations are possible. (C) 2013 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.

OXFORD

0109-5641

10.1016/j.dental.2013.03.001