Li T, Kong L, Wang Y, Hu K, Song L, Liu B, Li D, Shao J, Ding Y
Department of Orthodontics, School of Stomatology, the Fourth Military Medical University, Xi'an 710032, P. R. China.
Int J Oral Maxillofac Surg. 2009 Oct;38(10):1077-83. doi: 10.1016/j.ijom.2009.07.001. Epub 2009 Aug 4.
This study aimed to create a 3D finite element model for continuous variation of implant diameter and length, thereby identifying their optimal range in type IV bone under biomechanical consideration. Implant diameter ranged from 3.0 to 5.0mm, and implant length ranged from 6.0 to 14.0mm. The results suggest that under axial load, the maximum Von Mises stresses in cortical and cancellous bones decrease by 50% and 27%, respectively; and under buccolingual load, by 52% and 60%, respectively. Under these two loads, the maximum displacements of implant-abutment complex decrease by 39% and 43%, respectively. These results indicate that in type IV bone, implant length is more crucial in reducing bone stress and enhancing the stability of implant-abutment complex than implant diameter. Biomechanically, implant diameter exceeding 4.0mm and implant length exceeding 9.0mm are the combination with optimal properties for a screwed implant in type IV bone.
本研究旨在创建一个用于种植体直径和长度连续变化的三维有限元模型，从而在生物力学考量下确定其在IV型骨中的最佳范围。种植体直径范围为3.0至5.0毫米，种植体长度范围为6.0至14.0毫米。结果表明，在轴向载荷下，皮质骨和松质骨中的最大冯·米塞斯应力分别降低50%和27%；在颊舌向载荷下，分别降低52%和60%。在这两种载荷下，种植体-基台复合体的最大位移分别降低39%和43%。这些结果表明，在IV型骨中，种植体长度在降低骨应力和增强种植体-基台复合体稳定性方面比种植体直径更为关键。从生物力学角度来看，对于IV型骨中的螺纹种植体，直径超过4.0毫米且长度超过9.0毫米的组合具有最佳性能。
