Stegaroiu R, Sato T, Kusakari H, Miyakawa O
Department of Fixed Prosthodontics, School of Dentistry, Niigata University, Japan.
Int J Oral Maxillofac Implants. 1998 Jan-Feb;13(1):82-90.
The three-dimensional finite element analysis method was used to assess stress in bone around titanium implants using three treatment designs for a partially edentulous mandible, under axial (AX), buccolingual (BL), or mesiodistal (MD) loads. For each of these loads, highest stress was calculated in the model with a cantilever prosthesis supported by two implants (M2). Less stress was found in the model with a conventional fixed partial denture on two implants (M3), and lowest stress was calculated in the model with three connected crowns supported by three implants (M1). When BL load was applied to M3, cortical bone stress was high, comparable to that calculated for M2 under the same load. When AX or MD load was applied to M3, the cortical bone stress was low, similar to that found in M1 under each of these loads.
采用三维有限元分析方法，针对下颌部分牙列缺失的三种治疗设计，在轴向（AX）、颊舌向（BL）或近远中向（MD）加载情况下，评估钛种植体周围骨组织的应力。对于每种加载情况，在由两颗种植体支持的悬臂式修复体模型（M2）中计算出的应力最高。在两颗种植体上设置传统固定局部义齿的模型（M3）中应力较小，而在由三颗种植体支持的三个相连冠的模型（M1）中计算出的应力最低。当对M3施加BL载荷时，皮质骨应力较高，与在相同载荷下M2计算出的应力相当。当对M3施加AX或MD载荷时，皮质骨应力较低，类似于在这些载荷下M1中的应力。
