3‐D Finite element analysis of all‐ceramic posterior crowns

• DOI: 10.1046/j.1365-2842.2003.01123.x
• Publication Date: 2003-07-25T08:04:09Z
• Authors: A. Imanishi; T. Nakamura; T. Ohyama; T. Nakamura
• Keywords: Bite force quotient

summary The purpose of this study was to evaluate the stress distribution under various loading conditions within posterior all‐ceramic crowns. A three‐dimensional finite element model representing a lower first molar constructed. Variations had two types single layer crowns (Dicor and Empress) double (In‐Ceram Empress2) cemented. load 600 N, simulating maximum bite force, applied vertically Loads 225 masticatory were from three directions (vertically, at 45° angle, horizontally). In test tensile stresses on all (17·4–19·4 MPa) concentrated around points. force simulation test, specimens experienced 19·7–27·0 MPa horizontal 10·8–10·9 vertical load. When horizontally, observed points surface in case crowns, cervical area inner core Within limitation study, it found that strength occlusal contact is important integrity forces direction are critical factor.