牙列中度拥挤病人拔牙与非拔牙矫治前后牙弓宽度及长度变化比较  

DENTAL ARCH WIDTH AND ARCH LENGTH BEFORE VERSUS AFTER EXTRACTION AND NON-EXTRACTION TREATMENT IN MODERATE DENTITION CROWDING

作　　者：徐宏[1] 

机构地区：[1]青岛大学医学院附属医院口腔正畸科,山东青岛26003

出　　处：《青岛大学医学院学报》2012年第1期67-68,70,共3页Acta Academiae Medicinae Qingdao Universitatis

摘　　要：目的比较安氏Ⅰ类牙列中度拥挤错畸形病人拔牙和非拔牙矫治前后上颌牙弓宽度及牙弓长度的变化。方法 60例安氏Ⅰ类牙列中度拥挤错畸形病人分为拔牙与非拔牙组,拔牙组采用MBT技术矫治,非拔牙组采用自锁技术矫治。收集病人治疗前和治疗后模型,测量上颌牙弓尖牙间、前磨牙间与磨牙间牙弓宽度及上颌牙弓长度。结果拔牙组矫治后与矫治前比较尖牙间牙弓宽度及前磨牙间宽度增大,磨牙间牙弓宽度减少,牙弓长度减小,差异均有显著性(t=3.25～5.58,P<0.05);非拔牙组矫治后与矫治前比较尖牙及前磨牙间牙弓宽度增大,差异有显著性(t=3.47、3.79,P<0.05);拔牙组矫治前后磨牙间牙弓宽度及牙弓长度变化量均大于非拔牙组,差异有显著性(t=3.27、3.33,P<0.05)。结论拔牙矫治安氏Ⅰ类中度拥挤错畸形与非拔牙矫治比较磨牙间牙弓宽度及牙弓长度均减小。Objective To investigate the arch widths and arch length changes between before and after treatment by extraction and non-extraction in moderate dentition crowding.Methods Sixty patients with moderate crowding malocclusion in Angle ClassⅠdentition were enrolled and equally divided into extraction group and non-extraction group.For extraction group,MBT was applied;for non-extraction group,self-locking technique was adopted.Models before and after treatment were collected,the arch width of inter-canine,inter-premolar and inter-molar and the length of dental arch of maxilla were measured.ResultsAfter treatment,the inter-canine and inter-premolar width were increased,the inter-molar width and arch length decreased in the extraction group（t=3.25-5.58,P〈0.05）;the inter-canine and inter-premolar width were increased in the non-extraction group（t=3.47,3.49;P〈0.05）.The variation of inter-molar width and arch length after treatment in the extraction group was greater than that that in the non-extraction group（t=3.27,3.33;P〈0.05）.Conclusion The inter-molar width and arch length were decreased by extraction treatment for moderate crowding malocclusion in Angle Class Ⅰdentition.

关 键 词：错[牙合] 安氏Ⅰ类 拔牙 牙弓 数据说明 统计 

分 类 号：R783.5[医药卫生—口腔医学]