Dental Clinic, School of Dentistry, Federal University of Minas Gerais (UFMG), Belo Horizonte, MG, Brazil.
Braz Oral Res. 2009 Apr-Jun;23(2):182-9. doi: 10.1590/s1806-83242009000200014.
A comparative and qualitative analysis of the tensions generated in the cantilever region of an implant-supported mandibular complete denture was conducted using the three-dimensional finite element method. The mechanical properties of the components were input in the model and a load of 15 N was applied in pre-determined points. In the first simulation, the load was applied on the occlusal surface of the first premolar. In the second simulation, it was applied on the first and second premolars. In the third simulation, it was applied on the first and second premolars and on the first molar. The different occlusion patterns produced similar tension distributions in the cantilever region, which followed a similar pattern in the three simulations. In all of the cases, the highest levels of tension were located in the region of the first implant. However, as the loads were dislocated distally, the tensions increased considerably. The more extensive the cantilever, the more compromised will be the infrastructure, the prosthetic components and the implants. Regardless of the length of the cantilever, the highest tensions will always be located in the region of the implant next to the load application point.
采用三维有限元法对种植体支持下颌全口义齿的悬臂区域产生的张力进行了对比和定性分析。在模型中输入了组件的机械性能，并在预定点施加了 15 N 的载荷。在第一次模拟中，载荷施加在第一前磨牙的咬合面上。在第二次模拟中，载荷施加在第一和第二前磨牙上。在第三次模拟中，载荷施加在第一和第二前磨牙以及第一磨牙上。不同的咬合模式在悬臂区域产生了相似的张力分布，这在三次模拟中呈现出相似的模式。在所有情况下，张力最高的区域都位于第一种植体的区域。然而，随着负载向远端脱位，张力会显著增加。悬臂越长，基础设施、修复体组件和种植体受到的影响就越大。无论悬臂的长度如何，最高的张力总是位于靠近载荷施加点的植入物区域。
