摘要
目的对比分析骨性Ⅱ类与骨性Ⅰ类错畸形拔牙矫治前后软组织美学指标的变化差异。方法选取骨性Ⅱ类Ⅰ分类错畸形患者27例及骨性Ⅰ类双颌前突患者26例,采用直丝弓矫治技术进行矫治,每位患者均拔除了4颗双尖牙。将矫治前后的X线头颅侧位定位片进行软组织美学指标的测量分析。结果骨性Ⅱ类组患者矫治前后上唇倾角(A'Ls-FH)、颏沟倾角(Pg'B'-FH)、Z角和面突角(G-Sn-Pg')的变化差异有统计学意义(P<0.01)。骨性Ⅰ类组患者矫治前后上唇倾角、颏沟倾角和Z角的变化差异有统计学意义(P<0.01);矫治前后两组在Z角、面突角均存在差异。矫治前后两组无论组内或组间面角(NsPg'-FH)的变化均无统计学意义(P>0.05)。结论拔牙矫治对骨性Ⅱ类Ⅰ分类及骨性Ⅰ类双颌前突错畸形患者面型影响均较大,两组拔牙矫治前后的侧貌差异主要存在于颏部。面角非衡量骨性Ⅱ类Ⅰ分类及骨性Ⅰ类双颌前突是患者拔牙矫治前后侧面型变化的敏感指标。
Objective To compare the difference in aesthetic indicators of facial profile between the patients with skeletal Class ]1 and I malocclusion before and after the extraction treatment. Methods The samples consist of 53 patients（27 with skeletal Class lI division I malocclusion, and 26 with skeletal Class I bimaxinary protru- sion）. Every patient were corrected by straight wire appliance and each of them were extracted four premolars. Later- al eephalograms taken before and after the treatment were evaluated to determine the difference in aesthetic indicators of facial profile. Results The patients with class ]I malocclusion showed significant changes in the angle of inclina- tion of upper lip（ A＇Ls-FH）, the angle of inclination of chin（ Pg＇B＇-FH）, Z angle and the angle of protrusion of pro- file（G-Sn-Pg＇） after the treatment（P 〈 0. O1 ）. The patients with class I showed significant changes in A＇Ls-FH, Pg＇B＇-FH and Z angle after the treatment（P 〈 O. O1 ）. There was significant difference before and after treatment in Z angle and G-Sn-Pg＇ between the two groups. But there was no significant changes in NsPg＇-FH either intra- group orinter- groups before and after treatment（ P 〉 0. 05 ）. Conclusion The facial profile of patients with skeletal Class II and I malocclusion can be affected by the extraction treatment. The main difference in profile between the two groups occurred in the region of soft chin. NsPg＇-FH is not a sensitive indicator to determine the profile changes for the patients with skeletal Class II and I malocclusion.
出处
《中国临床新医学》
2013年第12期1135-1137,共3页
CHINESE JOURNAL OF NEW CLINICAL MEDICINE
基金
广西科学研究与技术开发计划项目(编号:桂科攻1140003B-72)
关键词
侧面型
软组织
美学
错[牙合]畸形
Lateral facial profile
Soft tissue
Aesthetics
Malocclusion
