女性生长发育高峰期后安氏Ⅱ~1类错后部牙弓与颌骨宽度的分析  

Posterior transverse interarch discrepancy and transverse maxillomandibular skeletal discrepancy of Class Ⅱ division I female patients after pubertal peak.

作　　者：李岩涛[1] 刘郁[1] 白玉兴[1] 王松灵[1] 

机构地区：[1]首都医科大学口腔医学院,北京现为100050

出　　处：《北京口腔医学》2005年第2期96-98,共3页Beijing Journal of Stomatology

摘　　要：目的分析生长发育高峰期后女性安氏Ⅱ1类患者存在的后部牙弓及颌骨宽度不调,为安氏Ⅱ1类患者的早期治疗提供临床依据。方法选取30例生长发育高峰期后的女性安氏Ⅱ1类及35例安氏Ⅰ类患者,在模型上测量上下牙弓的宽度并计算宽度差值(PTID),在头颅后前位X线片上测量上颌宽度、鼻宽度及下颌角间宽度,用独立样本的t检验进行统计学分析。结果生长发育高峰期后的安氏Ⅱ1类患者均存在着上牙弓及上颌骨的狭窄,其PTID与安氏Ⅰ类患者相比具有显著性差异(P<0.05)。结论生长发育没有改善安氏Ⅱ1类患者上颌后部牙弓及基骨的狭窄;对于安氏Ⅱ1类患者,早期通过扩大上牙弓的宽度,使下颌自由前伸,有利于Ⅱ类关系的纠正。Objective To study posterior transverse interarch discrepancy and transverse maxillomandibular skeletal discrepancy of female patients with Class Ⅱ division I malocclusions after pubertal peak.Methods A sample of 30 female subjects (mean age: 14.09 years) with Class Ⅱ division I malocclusions was compared with a control group of 35 female subjects(mean age: 14.21 years) with Class I occlusion. Subjects of both groups were in permanent dentition and after pubertal peak. Posterior transverse interarch discrepancy was measured in the dental cast as the difference between the maxillary and mandibular intermolar widths. Transverse maxillomandibular skeletal discrepancy was measured by posteroanterior cephalometrics.Results Subjects with Class Ⅱ division I malocclusions exhibited significant contraction of maxilla at both the dental and skeletal levels and a narrow base of the nose. The results of PTID were significantly lower than control group.Conclusion Growth can not change the contraction of maxillary dental arch and skeletal base. Expansion of maxillary dental arch in the early mixed dentition will allour the patient to posture jaw in a more protrusive position leading to a stable occlusion.

关 键 词：安氏Ⅱ^1类 生长发育高峰期 后部牙弓间横向差值 PTID 颌骨宽度 

分 类 号：R783.5[医药卫生—口腔医学]