《中国康复理论与实践》

《中国康复理论与实践》 ›› 2006, Vol. 12 ›› Issue (04): 355-356.

• 临床研究 • 上一篇    下一篇

下颌第一磨牙半切术后两种双端固定桥修复的光弹性应力分析

张少锋1a; 张冬梅1a; 张铁1a; 越野1b   

  1. 1.第四军医大学口腔医学院 a.修复科;b.修复工艺科 陕西西安市 710032
  • 收稿日期:2006-01-24 出版日期:2006-04-25 发布日期:2006-04-25

Photoelastic Stress Analysis of Two Kinds of Rigid Fixed Bridge Design after Hemisection of Mandibular First Molar

ZHANG Shao-feng, ZHANG Dong-mei, ZHANG Tie, et al   

  1. The Department of Prosthodontics, College of Stomatology, the Fourth Military Medical University, Xi'an 710032, Shaanxi, China
  • Received:2006-01-24 Published:2006-04-25 Online:2006-04-25

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被引次数

17

摘要： 目的观察下颌第一磨牙半切术后两种双端固定桥修复对牙槽骨应力分布的影响。方法以正常下颌第一磨牙受载为对照组,以下颌第一磨牙近中根半切术后,⑤⑥和⑤⑥⑦桥两种固定桥设计为实验组,运用光弹应力分析法,分析两种修复设计对第一磨牙半切术后余留区牙根周围支持组织应力分布状况的影响。结果两种双端固定桥修复后的牙槽骨应力值均大于对照组,但未超出其2倍;三基牙与双基牙两种双端固定桥设计的应力值间无显著性差异(P>0.05)。结论下颌第一磨牙半切术后选用双基牙双端固定桥的修复设计较适宜。

关键词: 半切术, 双端固定桥, 光弹性试验, 应力分析

Abstract: ObjectiveTo observe the effects of the two kinds of rigid fixed bridge design on the stress of the alveolar bone of mandibular first molar after hemisection.MethodsThe normal mandibular first molars were selected as control group. The two-abutment teeth and three-abutment teeth rigidly fixed bridge designs were selected as trial group. Stress distributions in the remaining sections of the alveolar bone models were evaluated with photoelastic stress analysis method.ResultsThe stress values of two kinds of rigid fixed bridge design were higher than the control group but still below the twice. There was no significantly difference between two-abutment teeth rigidly fixed bridge design and three-abutment teeth rigidly fixed bridge design (P>0.05).ConclusionTwo-abutment teeth rigidly fixed bridge of mandibular first molar should be chosen after hemisection.

Key words: hemisection, rigid fixed bridge, photoelastic experiment, stress analysis