乳磨牙为支抗前牵引矫治后上牙弓变化的初步研究  

Upper arch changes after maxillary protraction with rapid palatal expansion in skeletal Class Ⅲ patients by anchoring to the primary teeth

作　　者：叶金梅[1] 王洪涛[1] 邓利琴[1] 翟佳羽[1] 姜杰[1] 邓细河[1] 

机构地区：[1]广州市儿童医院口腔科,510120

出　　处：《北京口腔医学》2009年第5期265-268,共4页Beijing Journal of Stomatology

基　　金：广东省卫生厅医学科研基金立项(A2009544)

摘　　要：目的探讨以乳磨牙为支抗,上腭快速扩大联合前牵引矫治替牙早期严重骨性Ⅲ类错畸形的牙颌结构和上颌牙弓的变化。方法选择替牙早期严重骨性Ⅲ类错畸形患儿10名,以乳磨牙为支抗,上腭快速扩大联合前牵引矫治6个月,治疗前(T1)治疗后(T2)进行X线头影测量和石膏模型牙弓测量分析,采用配对t检验进行统计学分析。结果矫治结束时患儿侧貌明显改善,SNA增大2.70±0.97°,ANB角增大3.99±1.95°,Wits值增大3.21±1.00mm,有统计学差异(P<0.001)。牙弓宽度增加值从后向前逐渐减小,牙弓周长增加4.66+0.93mm,均有显著性差异(P<0.001)。结论以乳磨牙为支抗,上腭快速扩大联合前牵引矫治替牙早期严重骨性Ⅲ类错畸形后侧貌改善明显,上颌骨显著生长和前移,牙弓宽度及牙弓周长增加,能解除上牙弓小于5mm的轻中度拥挤。Objective To evaluate the changes of dentoskeletal profile and maxillary arch after maxillary protraction with rapid palatal expansion in the early mixed dentitions of skeletal class Ⅲ patients. Methods Serious skeletal Class Ⅲ patients were selected in the early mixed dentitions, 6 males and 4 females. Cephalograms and casts were taken before treatment （T1） and after teatment （T2）. Dentoskeletal and maxillary arch changes were compared statistically. Results After treatment, lateral profile changed significantly. SNA, ANB and Wits increased by 2. 70 ± 0. 97° ,3.99±1.95° and 3. 21 ± 1.00 mm respectively compared with pretreatment （ P 〈 0. 001 ）. The increased maxillary arch width gradually reduced from anterior to the posterior and the arch perimeter increased by 4. 66 ± 0. 93mm （ P 〈 0. 001 ）. Conclusion Maxillary protraction with rapid palatal expansion by anchoring to the primary teeth for skeletal Class Ⅲ patients could change the lateral dentoskeletal profile markedly.

关 键 词：骨性反 上腭快速扩大 前方牵引 乳磨牙支抗 牙弓变化 

分 类 号：R783.5[医药卫生—口腔医学]