摘要
目的:对比分析儿童青少年骨性Ⅱ类错牙合畸形患儿拔牙与非拔牙矫治前后的软组织侧貌变化差异。方法:由近年代向远年代抽取在该院口腔正畸科完成矫治的44例骨性Ⅱ类错牙合畸形患儿为研究对象,根据是否拔牙矫治分为拔牙组和非拔牙组,各22例。拔牙组患儿均拔除4颗双尖牙。对矫治前后的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:拔牙组除颏唇沟角(Li-B'-Pos)和面角(Ns Pg'-FH)矫治前后的变化差异无统计学意义(P>0.05)外,其余各测量指标均向面突度减小的方向变化,前后差异均有统计学意义(P<0.05);非拔牙组矫治前后仅下唇倾角(B'Li-FH)和上唇凸距(LsREP)的变化差异有统计学意义(P<0.05)。矫治前两组患儿上唇倾角(A'Ls-FH)、Ls-REP、下唇凸距(Li-REP)、Z角和颏沟倾角(Pg'B'-FH)比较,差异均有统计学意义(P<0.05)。矫治后拔牙组的A'Ls-FH、上下唇角(A'Ls-B'Li)、Z角和Pg'B'-FH均大于非拔牙组,差异均有统计学意义(P<0.05)。结论:软组织侧面型较突的骨性Ⅱ类错牙合畸形患儿通过拔牙矫治有望获得较大的面型改变,而非拔牙矫治对患儿的侧貌影响较小。
Objective： To compare and analyze the differences of facial soft tissue profile changes of children and adolescents be- fore and after extraction and non-extraction treatment of skeletal class Ⅱ malocclusion. Methods： Forty-four children and adolescents with skeletal class Ⅱ malocclusion who completed treatment in Department of Orthodontics in the hospital were selected as study respondents ac- cording to time sequence, then they were divided into extraction group and non-extraction group according to the therapy, 22 cases in each group. The cases in extraction group were extracted four premolars. Facial soft tissue esthetic indexes were measured and analyzed based on X-ray lateral cephalogram before and after treatment. Results： In extraction group, there was no statistically significant difference in the changes of Li-B＇-Pos and NsPg＇-FH before and after correction （ P〉0. 05）, the other measurement indexes changed to decrease of facial convexity, there were statistically significant differences before and after correction （P〈0. 05 ） ; in non-extraction group, there were statisti- cally significant differences in changes of B＇Li-FH and Ls-REP before and after correction （P〈0. 05） . Before correction, there were statis- tically significant differences in A＇Ls-FH, Ls-REP, Li-REP, Z angle, and Pg＇B＇-FH between the two groups （P〈0. 05） ; after correction, A＇Ls-FH, A＇Ls-B＇Li, Z angle, and Pg＇B＇-FH in extraction group were statistically significantly higher than those in non-extraction group （P〈0. 05 ） . Conclusion： After extraction, facial soft tissue profile can be changed significantly among the children with more prominent skeletal class Ⅱ malocclusion, while for the children not receiving extraction, the effect is not obvious.
出处
《中国妇幼保健》
CAS
2015年第14期2203-2205,共3页
Maternal and Child Health Care of China
基金
广西科学研究与技术开发计划项目〔桂科攻1140003B-72〕
关键词
骨性Ⅱ类错牙合畸形
软组织侧面型
拔牙
Skeletal class Ⅱ malocclusion
Facial soft tissue profile
Extraction
