关键词: 种植体直径, 种植体长度, 种植体锥度, 三维有限元分析, 三因素两水平析因设计

Abstract:

Objective To analyze and compare systematically the relative and interactive effects of implant diameter，stem length and crestal length on the stress distribution of implant-bone interface. Methods Eight three-dimensional finite-element models were created of a premolar section of the maxilla with a single endosseous implant embedded in. A two-level factorial statistical design was used to determine the diameter，length and taper of the implants. A traction force of 200g was applied to be 90°to the implant . The Von Mises stress of the models was analyzed， and then compare the relative and interactive effects of these three design variables. Results Either the diameter or the taper of the implant increased. The Von Mises stress in the bone near the implant dropped statistically，but the change of the length didn't show statistical influence. Conclusion If the objective is to minimize peri-implant strain in the crestal alveolar bone， a wide and tapered implant appears to be the most favorable choice.

Key words: implant diameter, implant length, implant taper, three-dimensional finite element analysis, three-factor two-level factorial design