Objectives: The aim of this in-vitro study was to evaluate the amount and localization of stress that occur with various materials used in implant-crown design under functional forces. Material and methods: Computer aided design techniques and finite element stress analysis method were used for evaluation. A 4.1x 10 mm sized implant placed in the mandibular second premolar area was simulated and analysed. Simulation and analysis were performed using COSMOS/M software and Pro/Engineer 2000i in Dual Pentium III 1GHz computer. Crown designs were as follows: porcelain fused to noble metal crown, porcelain fused to base metal crown, In-Ceram porcelain crown, and IPS- Empress 2 porcelain crown. A 300N vertical force was applied to the centric relation stop points of the crowns. Results: The results of this study indicated that different types of restoratif materials play an important role in the amount and distrubution of the stresses in the superstructure and the implant. The highest stress values were observed in IPS Empress 2 ceramic crown design (600 MPa). Porcelain fused to base metal and In-Ceram crown designs transfered less stress to abutment. Conclusion: Type of restorative materials used in implant crown designs are significant factors in the amount and distribution of the stresses on superstructure and implant under functional forces. From the biomechanical point of view the most suitable material for the superstructure was found to be porcelain fused to base metal.

Back to the Scientific Program Program
Back to the Joint Meeting of the Continental European, Israeli, and Scandinavian (NOF) Divisions of the IADR (August 25 -- 28, 2004)

Top Level Search