在传统和袖子固定部分牙套设计周围的应力分布的评估:有限元分析
Mohiddin R Dimashkieh1, Salah A Yousief1,2, Amir M Demachkia3
1Department of Restorative and Prosthetic Dental Sciences, College of Dentistry, Dar Al Uloom University, Riyadh, Saudi Arabia.
European journal of dentistry
|December 10, 2024
概括
袖子固定部分假牙 (PD) 设计比四个单位的传统设计更能减少骨压力. 高刚性PD材料可以更好地分散负荷,而体在三单元PD中表现出最佳的应力分布.
科学领域:
- 生物材料科学 生物材料科学
- 牙造型牙科 牙造型牙科 牙造型牙科
- 在牙科领域的有限元分析.
背景情况:
- 固定部分假牙 (PD) 对于恢复缺失的牙至关重要.
- 传统的PD设计可能无法最佳地分配闭塞力.
- 研究新的设计,如袖子PD和各种材料,对于改善假肢寿命和支持骨健康至关重要.
研究的目的:
- 为了比较传统与袖子固定部分假牙 (PD) 设计的生物力学性能.
- 评估不同材料 (,E-max,Celtra Duo) 对三和四单位PD病例中的应力分布的影响.
- 评估这些设计和材料对底层骨和粘膜组织的影响.
主要方法:
- 开发了四种有限元模型,用于三和四个单位的固定部分假牙 (PD).
- 模拟骨头作为两个立方体结构.
- 在每个PD设计的上施加压力和斜负荷,在24种不同的负荷场景下测试各种材料组合 (,E-max,Celtra Duo).
主要成果:
- 对于三单位的PD,物质变化对皮层骨压力的影响最小,斜负荷增加了12-15%的压力.
- 四个单位的PD显示,与传统设计相比,袖子设计减少了皮层骨压力 (高达20%).
- 套套设计显著降低了水泥层的应力,材料的刚性影响了PD反应;粘膜和海绵骨受到影响最小.
结论:
- 较高刚度的PD材料有效地分散负载,有利于底层结构.
- 套件PD设计与三单元PD的传统设计相似,但对于四单元PD来说优越.
- 石在三单元的PD中表现出优越的应力消散,而在四单元的PD中则相反.
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