上颌复合体手术辅助腭扩展应力分布和位移的研究  

Stress distribution and displacement of the craniofacial complex after surgically assisted rapid maxillary expansion

作　　者：聂敏媛[1] 丁寅[2] 党平[1] 施生根[1] 

机构地区：[1]解放军第306医院全军口腔疾病诊治中心,100101 [2]西安第四军医大学口腔医院正畸科,710032

出　　处：《中华口腔正畸学杂志》2010年第3期153-156,共4页Chinese Journal of Orthodontics

摘　　要：目的 模拟手术辅助腭扩展术,分析上颌骨复合体应力分布与位移趋势.方法 在力学相似性较高的上颌骨复合体三维有限元模型上,模拟第一磨牙处颊侧骨皮质切开辅助腭扩展术,计算各标志点的应力及位移,所得结果与常规腭扩展相比较.结果 颊侧骨皮质切开术辅助腭扩展开展牙弓,可有效增加横向扩展的位移,尤其在尖牙和前磨牙区.同时鼻腔和腭盖下降,有助于降低通气阻力.结论 颊侧骨皮质切开辅助腭扩展的方法效果确切.Objective To simulate the state of surgically assisted rapid maxillary expansion on the craniofacial complex, and to evaluate the stress distribution and displacement. Methods Simulated surgically assisted rapid maxillary expansion was performed at the first molar region on a three-dimensional finite element model of the craniofacial complex. The stress distribution and displacement were compared before and after expansion. Results Expansion was found in thetransverse plane, especially in the canine and the first premolar regions. The nasal cavity and palatal plane moved downward and that could relief the resistance of breath. Conclusions Surgically assisted rapid maxillary expansion was effective.

关 键 词：应力分布 模拟手术 上颌复合体 位移 骨皮质切开术 上颌骨复合体 腭 三维有限元模型 

分 类 号：R783.5[医药卫生—口腔医学]