摘要
目的:研究成年人边缘型牙列拥挤病例正畸治疗前后X线头颅侧位片,分析颏部形态在颅面部硬组织侧貌形态中的作用,及其是否可作为临床矫治设计中判断是否拔牙的指标。探讨颏部突度对成年人临界拔牙病例矫治设计的影响。方法:选取50例年龄18～34岁已完成正畸治疗的错牙合畸形患者,男22名,女28名。其中25例为拔牙矫治,拔除4个前磨牙,25例采用非拔牙矫治。矫治后侧貌良好,覆牙合覆盖正常,完成头影测量29项,并对50例临床牙牙合畸形拔牙与非拔牙病例正畸治疗前牙颌面硬组织、及软组织治疗前后变化进行对比的回顾性研究,进行成组设计和配对设计t检验。并进行拔牙概率的回顾性分析。结果:治疗前拔牙组与非拔牙组在Pog-NB,U1-NP,SNP测量项目在2组之间存在显著性差异,Pog-NB,U1-NP与拔牙概率存在高度相关关系。拔牙组颏部突度明显小于非拔牙组,上切牙唇倾度明显大于非拔牙组。治疗前、后软组织在2组病例无统计学意义的差异。结论:对于成年人临界拔牙病例制定矫治计划时,为达到良好的侧貌,要综合考虑影响侧貌的鼻唇颏协调一致。颏部突度越小,上切牙唇倾度和突度越大拔牙的概率越大。
Objective： To investigate the correlation between the shape of chin and orthodontic treatment with and without extractions treatment and develop a discriminated method to predict probability of orthodontic extraction in adults. Methods： A total of 50 patients（25 first premolar extraction cases and 25 non--extraction cases）were col- lected from the orthodontic clinic1. There were 28 females and 22 males with an average age of 24.5. Twenty-- nine parameters were measured. Conventional cephalometric analysis was performed to compare the hard tissue struc- tures in extraction and non--extraction cases before orthodontic treatment. The mean and standard deviation of each measurement were calculated for all the variables with SPSS17. The correlation analysis, T--test and logistic re- gression analysis were used. Results： The Pog--NB,U1--NP, SNP exhibited significant difference between extrac- tion and non--extraction cases. Logistic regression analysis showed that the probability of orthodontic extraction was significantly correlated with the Pog--NB and U1--NP. Conclusion： The important factor in determining ex- traction in borderline cases of adults was the prominence of the chin and the upper incisors. The probability of or thodontic extraction decreased with the increasing chin prominence and the decreasing upper prominenc.
出处
《口腔医学研究》
CAS
CSCD
2012年第7期730-733,共4页
Journal of Oral Science Research
关键词
成年人
颏部
正畸拔牙
相关性
Adults Pognion Orthodontic extraction Correlation
