“Stress distribution of screw retained hybrid abutment crowns with different abutment connections”

Abstract

Proper treatment planning and a sound understanding of restorative aspects of dental implants can prevent most implant failures. This study was conducted to get a better understanding of the different combinations of restorative materials and implant connections in order to better choose the right type of restoration for different clinical situations. Finite element analysis (FEA) and strain gauge (SG) measurement analysis were conducted to evaluate the stress and strain transfer through lithium disilicate (LD), polymer infiltrated ceramic network (VE) and fully stabilized cubic zirconia (CZ) hybrid abutment crowns to different implant connection systems (internal hexagon (IH) and conical connections (CC)) and their effect on the implant and surrounding bone. A three-dimensional (3D) model simulation of the implants and its components was obtained from the manufacturer and modelled in the 3D FEA software. Six different models were created according to combinations of restoration materials (LD, VE, CZ) and abutment connections (IH and CC). The hybrid abutment crowns were loaded virtually 100N vertically in the central fossa and 30⸰ oblique direction. The stress distribution in the crown, implant, abutments and surrounding bone were evaluated through the Von Mises stress analysis.