摘要
目的:探讨Spee曲线和拥挤度对口腔正畸模型2D和3D测量法的影响。方法:收集临床就诊中34例恒牙列期患者的记存模型,进行2D(模型法和影印法)和3D(数字化模型)的测量,对牙齿大小,牙弓长度和宽度,拥挤度以及Spee曲线深度测量,随后按Spee曲线深度和拥挤程度分组比较,并进行单因素方差分析的统计学分析,如有差异再行LSD法的两两比较分析。结果:Spee曲线和拥挤度对牙体大小的测量有明显统计学差异(P<0.05)。两两比较结果表明,数字模型和影印模型的差异较大,上颌轻度拥挤组为(1.16±1.34)mm(P=0.000),下颌轻度拥挤组为(1.14±1.40)mm(P=0.000),下颌中度拥挤组为(1.35±2.19)mm(P=0.028)。随着Spee曲线曲线深度的增加,石膏模型和数字模型与影印模型对比,牙齿的大小有明显的变化,且有统计学差异。数字模型与影印模型在Spee曲线中度组的差异为(1.70±1.39)mm(P=0.001),Spee曲线深度组为(1.66±1.46)mm(P=0.002)。结论:轻/中度拥挤组,2D和3D测量差异较大;Spee曲线深度对2D影印模型的测量有较大影响。
Objective：To investigate the effect of Spee＇s curve and crowding on the 2 Dand 3 D measurement of orthodontic model.Methods：Study models of 30 patients with permanent dentition in clinical treatment were collected.They were measured by 2 D（plaster models and photocopies）and 3 D（didital models）.The size of teeth,arch length and width,crowding and the depth of Spee curve were measured with grouping by crowding and the depth of Spee＇s curve.The results mentioned above were evaluated by one-way ANOVA and further compared by LSD method if difference was significant.Results：The differences of the teeth＇s sizes influenced by Spee＇s curve and crowding were statistically significant（P〈0.05）.Pairwise comparison results showed that the difference between digital and photocopies models was obvious.Maxillary mild crowding group was 1.16±1.34 mm（P =0.000）,mandibular mild crowding group was（1.14±1.40）mm（P=0.000）,and mandibular severe crowding group was（1.35±2.19）mm（P=0.028）.With the increasing of the depth of Spee＇s curve,there were statistically significant difference in the teeth＇s sizes of plaster models,digital models and photocopies.The difference of digital models and the photocopies in the mild Spee＇s curve group was（1.70±1.39）mm（P=0.001）,and in the severe Spee＇s curve group was（1.66±1.46）mm（P=0.002）.Conclusion：Three measuring methods had good accuracy.Measuring differences were related to crowding and the depth of the Spee＇s curve.
作者
龚诚
闻娟
李佳岭
李煌
GONG Cheng;WEN Juan;LI Jia-ling;LI Huang(Department of Orthodontics, Institute and Hospital of Stomatology, Nanjing University Medical School, Nanjing 210008, China.)
出处
《口腔医学研究》
CAS
北大核心
2018年第6期657-661,共5页
Journal of Oral Science Research
基金
国家自然科学基金(编号:81470712
81670960)
江苏省自然科学基金(编号:20171123)
江苏省卫生青年人才第三层次项目
江苏省三三三人才工程项目
