| 3507 Effects of periodontal supports with different connections for splinting implant | ||
|
C.-L. LIN, Chang Gung University, Tao-yuan, Taiwan, S.-H. CHANG, Chang Gung Memorial Hospital, Tao-Yuan, Taiwan, Y.-C. KUO, Chang Gung University, Tao-Yuan, Taiwan, and J.-C. WANG, Kaohsiung Medical University, Taiwan Objectives: The aim of this study was to investigate the mechanical interactions in implant-teeth splinting systems under various periodontal supports and the number of splinted teeth with rigid and non-rigid connectors using non-linear finite element (FE) approach. Methods: A FE model containing a Frialit-2 implant (placed in the second molar position) splinted to the first and second premolars was constructed. Non-linear contact elements were used to simulate a realistic interface fixation between the implant body and abutment screw and sliding keyway stress-breaker function. Stress distributions in the splinting system with three periodontal supports (the crown to root ratios were defined as normal, 1:1 and 2:1), two connector designs (rigid or non-rigid connectors) and two splinting situations (one or two natural teeth) were observed when vertical forces (50N) were applied to the prosthesis in 12 simulated models. Results: The stress values of the implant system, alveolar bone and the prosthesis increased with reducing periodontal support in the splinting system. This was influenced directly by the mobility magnification of the natural abutment while decreasing the bone levels. The non-rigid (keyway) connector broke the stress-transfer from the implant-side to natural abutments and caused implant system and prosthesis stress values using non-rigid connectors higher than those with rigid connections. The additional splinting effect with two teeth slightly decreased the implant system and alveolar bone stress values compared to those with one natural tooth abutment. Conclusion: A non-rigid (keyway) connector should be used with caution as it breaks the stress transfer and increases the unfavorable stress values in the implant system and prosthesis. Additional teeth splinting could help to reduce the implant system and alveolar bone stress values regardless of whether different connector types and periodontal supports. | ||
| Seq #360 - Biomechanics/Implant Surfaces 10:15 AM-11:30 AM, Saturday, 13 March 2004 Hawaii Convention Center Exhibit Hall 1-2 | ||
|
Back to the Implantology Research Program
| ||