Stress analysis of implant-retained maxillary overdenture without palatal plate.

对种植体固位上颌覆盖义齿的应力集中部位进行了研究。采用有限元法，将4颗种植体用圆杆连接，建立带硅胶人工黏膜的上颌无牙颌模型，利用应变片，对第一磨牙进行垂直加载和应力分析。结果表明，在本研究中，压应力主要作用于义齿基托树脂的夹端附近。

The stress concentration part of an implant-retained maxillary overdenture(IOD) was examined. Finite element method and four implants were connected by round bars, the upper jaw edentulous jaw model which carried silicone artificial mucosa was built, using strain gages, the perpendicular load was carried out and stress analysis was performed to first molars. As result, It turned out that compression stress is most applied to denture base resin near the end of a clip in the present study.