Association between 3D palatal morphology and upper arch dimensions in buccally displaced maxillary canines early in mixed dentition
Association between 3D palatal morphology and upper arch dimensions in buccally displaced maxillary canines early in mixed dentition
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DOI：
10.1093/ejo/cjy023
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发表时间：
2018-12-01
影响因子：
2.6
通讯作者：
Perillo, Letizia
中科院分区：
文献类型：
--
作者：
Bizzarro, Maria;Generali, Chiara;Perillo, Letizia
目的：应用激光三维扫描技术，评价上颌牙弓横径、腭深、腭部面积和体积与口腔移位尖牙(BDC)的关系。材料和方法：60例8~11岁(平均9.26+/-1.48岁)的高加索人。每组(BDC组和非BDC组)30名儿童配对。使用3Shape D700激光扫描仪获取数字化牙科模型。测量尖牙和磨牙间宽度(牙尖和牙龈水平)、前、后腭部深度(牙尖水平)、腭部表面积和体积。结果：根尖尖牙间宽度(1.76 mm；P=0.020)、牙龈平面(1.6 mm；P=0.006)、腭部面积(133 mm(2)；P=0.021)和体积(790 mm(3)；P=0.046)均显著低于对照组。为了克服这一限制，使用了匹配的对照组。一些受试者因为过渡阶段而没有牙齿，这可能会对牙齿测量产生影响。然而，这些受试者并没有被排除在外，以避免引入偏差。结论：对上颌牙弓和腭部的3D评估突出了BDC和非BDC混合牙列受试者之间的显著差异。上颌牙弓的大小和腭部形态可能有助于早期识别和预防上颌尖牙阻生。
Objectives: To evaluate the association between maxillary dental arch transverse dimensions, palatal depths, palatal area and volume with buccally displaced canine (BDC) in mixed dentition subjects when compared to non-BDC subjects using laser scanner 3D technology.Materials and methods: Sixty Caucasian subjects, 8-11 years of age (mean, 9.26 +/- 1.48 years), were included. In each group (BDC and non-BDC) 30 children were matched. Digital dental casts were obtained using a 3 Shape D700 laser scanner. Intercanine and intermolar widths (cusp and gingival levels), anterior and posterior palatal depth (cusp level), palatal surface area and volume were measured. An independent sample Student's t-test and an ANOVA were undertaken with significance level set as P < 0.05.Results: Intercanine widths at the cusp (1.76 mm; P = 0.020) and the gingival level (1.6 mm; P = 0.006), palatal area (133 mm(2); P = 0.021) and volume (790 mm(3); P = 0.046) were significantly lower in the BDC compared to the control group.Limitations: A smaller part of the subjects was in late mixed dentition phase. To overcome this limitation a matched control group was used. Some subjects did not have some teeth because of the transition phase which might have had an influence on the dental measurements. However, these subjects were not excluded to avoid introducing a bias.Conclusions: 3D evaluation of the maxillary arch and palate highlighted significant differences between BDC and non-BDC mixed dentition subjects. Maxillary dental arch dimensions and palate morphology may allow early identification and prevention of maxillary canine impaction.