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《Journal of the Fourth Military Medical University》 2006-14
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Stress analysis of mandibular complete dentures supported by implants with various occlusions

ZHANG Shao-Feng1, ZENG Yu-Geng2, MA Xuan-Xiang1 1Department of Prosthodontics, College of Stomatology, Fourth Military Medical University, Xi'an 710033, China, 2Department of Electron and Mechanics, School of Mechano- Electronic Engineering, Xidian University, Xi'an 710071, China  
AIM: To investigate the stress status of mandibular complete dentures supported by implants with various balanced or unbalanced occlusion. METHODS: A 3-D finite element model of mandibular complete dentures supported by implants was established to analyze the stress status with protrusive or lateral occlusions. RESULTS: To the osseointegrated implant-supported fixed prosthesis, the stresses of implant-bone interface and denture base in protrusive balanced occlusion were lower than those in protrusive unbalanced occlusion, but no distinct different between balanced and unbalanced lateral occlusions. To the osseointegrated implant-supported overdenture, its stresses in protrusive and lateral balanced occlusions were lower than those in their unbalanced ones. CONCLUSION: A balanced occlusal scheme should pay attention to the implant-supported overdenture, also to the implant-supported fixed prosthesis in protrusive occlusion, but not to the implant-supported fixed prosthesis in lateral occlusion.
【Fund】: 国家自然科学基金项目(39600165)
【CateGory Index】: R783
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