年轻成人上颌快速扩弓(YA-RME)对牙颌结构的影响  

Dental and skeletal changes of young adults with pesterior croesbite after rapid maxillary expansion

作　　者：寇波[1] 王春玲[1] 刘东旭[1] 叶静[1] 郑效忠[2] 

机构地区：[1]山东大学口腔医院正畸科,济南250012 [2]山东大学材料学院工程力学研究所

出　　处：《现代口腔医学杂志》2006年第5期464-467,共4页Journal of Modern Stomatology

摘　　要：目的探讨年轻成人上颌快速扩弓后患者牙颌结构的变化。方法以16例年轻成人上颌快速扩弓患者为观察组,32例替牙期上颌快速扩弓患者为对照组。比较扩弓前(T1期)扩弓后(T2期)患者牙颌结构的变化,测量项目包括上颌牙弓宽度、上颌第一恒磨牙(牙合)平面交角、临床牙冠高度、腭穹隆角、腭龈缘水平宽度、腭中部宽度、腭顶宽度差以及下颌平面角和下面高。t检验,α为0．05。结果①上颌快速扩弓后观察组6-6牙弓宽度增加4．2+2．7mm,对照组增加5．4+2．3mm,二者没有显著性差异。②上颌快速扩弓后观察组上颌第一恒磨牙(牙合)平面交角减小6．4+11．3°,对照组减小0．6+5．6°,二者具有显著性差异。③上颌快速扩弓后观察组腭穹隆角增加8．1+ 6．9°,对照组增加1．6+7．8°,二者具有显著性差异。④上颌快速扩弓后观察组腭顶宽度差为0．8+1．2mm,对照组为3．0+1．7mm,二者具有显著性差异。⑤上颌快速扩弓后观察组临床牙冠高度增加0．6+0．4mm,对照组增加0．2 +0．4mm,二者没有显著性差异。⑥上颌快速扩弓后观察组下颌平面角增加0．9+1．8°,对照组增加1．4+2．5°,二者没有显著性差异。结论年轻成人上颌快速扩弓可以有效地扩大上颌牙弓宽度,扩弓主要依靠牙齿及牙槽骨的颊向倾斜扩展,但是并不会引起明显的牙龈退缩和下颌顺时针旋转。Objective To evaluate the dental and skeletal changes in young adults with posterior crossbite after rapid maxillary expansion. Methods The observation group included 16 YA - RME subjects, while the control group included 32 RME subjects in mixted dentine. Records were taken at the pre- treatment time （TI） and post- treatment （T2） including 9 measurements of maxillary transverse arch width, molar angle, clinical crown height, palatal vault angle, palatal width at gingival height, palatal width at mid- palate, palatal width difference, MP- SN angle and ANS - Me distance. Students＇ t- test were used to determine if there were significant differences between 2 time periods and between 2 groups. Results ①There was no significant difference between YA - RME group and control group in the 6 - 6 transverse arch width increase; 4.2 ＋ 2.7mm compared to 5.4 ＋ 2.3mm. ② Significant difference was found in molar angle decrease; 6.4 ＋ 11.3° compared to 0.6 ＋ 5.6°. ③Significant difference was found in palatal vault angle increase; 8.1 ＋ 6.9°compared to 1.6 ＋ 7.8°. ④Significant difference was found in palatal width difference; 0.8 ＋ 1.2mm compared to 3.0 ＋ 1.7mm. ⑤No significant difference was found in clinical crown height increase; 0.6 ＋ 0.4mm compared to 0.2 ＋0.4mm. ⑥No significant difference was found in MP- SN angle increase; 0.9 ＋ 1.8°compared to 1.4 ＋ 2.5°. Conclusion The results indicate that young adult rapid maxillary expansion （YA- RME） is a clinically effective and safe method for correcting maxillary arch deficiency without significant gingival recession and mandibular rotation.

关 键 词：年轻成人上颌快速扩弓 手术辅助上颌快速扩弓 牙龈退缩 下颌旋转 

分 类 号：R783.5[医药卫生—口腔医学]