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目的:探讨螺旋压缩成骨器放置颊侧和腭侧对减阻上颌骨的应力及位移的比较。方法:利用三维有限元分析法构建螺旋压缩成骨器配合牙槽外科减阻快速内收上颌前牙及颌骨的三维有限元模型,螺旋压缩成骨器分别放置颊侧、腭侧,对上前牙施加位移0.75 mm工况,分析减阻上颌骨的应力、位移趋势。结果:上颌骨均发生应力分布和位移趋势,尤以远中向位移趋势明显,但颊侧和腭侧结果不同。结论:螺旋压缩成骨器对上颌骨远中向移动都会产生积极影响,但加力方式不同,移动趋势不同。
OBJECTIVE: To investigate the stress and displacement of drag reduction maxillary bone with helical compression osteotome placed on the buccal and palatal sides. Methods: The three-dimensional finite element model of spiral compression osteotomy combined with alveolar surgery for fast adduction and maxillary anterior teeth and mandible was established by three-dimensional finite element analysis. The helical compression osteosynthesis devices were placed on the buccal and palatal sides respectively, The displacement of anterior teeth was 0.75 mm, and the stress and displacement of the maxillary drag reduction were analyzed. Results: The stress distribution and displacement tendencies occurred in the maxilla, especially in the mid-to-distal direction, but the buccal and palatal findings were different. CONCLUSION: Spiral compression osteotomy can have a positive effect on the movement of the maxillary bone in the mesial direction, but with different modes of application and different movements.