This work aims to analyze the performance of endodontically treated incisors restored with a composite framework currently utilized for crowns, bridges, veneers and inlay/onlay buildups. The novelty in this research is that the composite material is now shaped as a cast post so to follow the root cavity profile. Experimental tests have been carried out on two sets of endodontically treated central maxillary incisors in order to evaluate the mechanical behavior of Customized Composite Post System (CCPS) with respect to Standard Post Restorations (SPR). Preliminary three-point-bending tests served to characterize restorative materials under investigation. FEM analysis helped to understand better the failure mechanisms seen in the experiments. It was found that CCPS flexural stiffness is almost the same as healthy dentine (less than 10% difference). Furthermore, CCPS restored teeth showed higher resistance to fracture than the SPR ones and their failure patterns were protective to the remaining tooth structure.
Custom vs. prefabricated composite post systems: in-vitro testing and numerical study of failure modes
LAMBERTI, Luciano;PAPPALETTERE, Carmine;
2004-01-01
Abstract
This work aims to analyze the performance of endodontically treated incisors restored with a composite framework currently utilized for crowns, bridges, veneers and inlay/onlay buildups. The novelty in this research is that the composite material is now shaped as a cast post so to follow the root cavity profile. Experimental tests have been carried out on two sets of endodontically treated central maxillary incisors in order to evaluate the mechanical behavior of Customized Composite Post System (CCPS) with respect to Standard Post Restorations (SPR). Preliminary three-point-bending tests served to characterize restorative materials under investigation. FEM analysis helped to understand better the failure mechanisms seen in the experiments. It was found that CCPS flexural stiffness is almost the same as healthy dentine (less than 10% difference). Furthermore, CCPS restored teeth showed higher resistance to fracture than the SPR ones and their failure patterns were protective to the remaining tooth structure.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
