Dayrell Andreza Costa, Noritomi Pedro Yoshito, Takahashi Jessica Mie, Consani Rafael Leonardo, Mesquita Marcelo Ferraz, dos Santos Mateus Bertolini
Int J Prosthodont. 2015 Nov-Dec;28(6):621-3. doi: 10.11607/ijp.4258.
This study evaluated the influence of implant-abutment connections on stress distribution through 3D finite element analysis. Three-dimensional models of an implant-supported fixed prosthesis in the jaw retained by four implants with different connection systems (external hex and Morse taper) were analyzed. External hex connection promoted higher microstrain values, which were concentrated on the cervical region of the distal implants extending into the trabecular bone, while Morse taper connection provided a more even distribution of the microstrain on all implants. Implant-supported fixed prostheses with external hex connections tend to concentrate strain in the distal implants, while Morse taper connection promoted a better situation. On the other hand, there was greater demand on the prosthetic screws and abutments of Morse taper connections than on external hex connections.
本研究通过三维有限元分析评估了种植体-基台连接对应力分布的影响。分析了由四个具有不同连接系统（外六角和莫氏锥度）的种植体支持的颌骨内种植体支持固定义齿的三维模型。外六角连接产生更高的微应变值，这些值集中在延伸至松质骨的远端种植体的颈部区域，而莫氏锥度连接在所有种植体上提供了更均匀的微应变分布。具有外六角连接的种植体支持固定义齿倾向于将应变集中在远端种植体上，而莫氏锥度连接则改善了这种情况。另一方面，与外六角连接相比，莫氏锥度连接对修复螺钉和基台的要求更高。
