口腔医学研究

口腔医学研究 ›› 2018, Vol. 34 ›› Issue (6): 657-661.DOI: 10.13701/j.cnki.kqyxyj.2018.06.020

• 口腔正畸学研究 • 上一篇    下一篇

Spee曲线和拥挤度对口腔正畸模型2D与3D测量法的影响

龚诚, 闻娟, 李佳岭, 李煌*   

  1. 南京大学医学院附属口腔医院正畸科 江苏 南京 210008
  • 收稿日期:2017-11-02 出版日期:2018-06-20 发布日期:2018-06-21
  • 通讯作者: 李煌,E-mail:lihuang76@nju.edu.cn
  • 作者简介:龚诚(1991~ ),男,江苏人,硕士研究生,主要从事口腔正畸学研究工作。
  • 基金资助:
    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

Influence of Spee's Curve and Crowding on 2D and 3D Measurement of Orthodontic Model

GONG Cheng, WEN Juan, LI Jia-ling, LI Huang*   

  1. Department of Orthodontics, Institute and Hospital of Stomatology, Nanjing University Medical School, Nanjing 210008, China
  • Received:2017-11-02 Online:2018-06-20 Published:2018-06-21

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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。

关键词: 3D测量, 2D测量, 牙列拥挤度, Spee曲线

Abstract: Objective: To investigate the effect of Spee's curve and crowding on the 2D and 3D measurement of orthodontic model. Methods: Study models of 30 patients with permanent dentition in clinical treatment were collected. They were measured by 2D (plaster models and photocopies) and 3D (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±1.34mm (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.

Key words: 3D measurement, 2D measurement, Spee's curve, Dental crowding