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首页> 外文期刊>American Journal of Orthodontics and Dentofacial Orthopedics >Three-dimensional evaluations of the digital casts of morphologic maxillary teeth symmetry in patients with unilateral palatally displaced canines
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Three-dimensional evaluations of the digital casts of morphologic maxillary teeth symmetry in patients with unilateral palatally displaced canines

机译：单侧间移位犬患者形态上颌牙齿对称性数字施放的三维评价

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Introduction: The goal of this study was to compare the size and morphologic symmetry of the maxillary teeth in subjects with and without unilateral palatally displaced canines (PDCs). Methods: Plaster casts of 38 subjects (mean age 14.75 +/- 0.95 y) with unilateral PDCs were selected (study group [SG]) and compared with casts from an age- and sex-matched control group (CG). Then dental casts of both groups were scanned into 3-dimensional (3D) models. Tooth sizes (mesiodistal [MD] and buccolingual [BL] widths and volumes) for SG and CG were measured. Afterward, 3D deviation analysis was carried out with the use of Geomagic Control X software. All of the data were normally distributed according to parametric tests. Results: All of the maxillary tooth diameters were smaller in SG than in CG. Statistically significant differences (P = 0.001) were obtained when comparing the widths and volumes of the PDC quadrant and the unaffected quadrant of the same patient. Morphologic tooth symmetry by surface-to-surface matching for SG (PDC side vs non-PDC side) and CG (right vs left quadrant) demonstrated significant (P = 0.001) but small differences, except for the lateral upper incisors (71.27%). Conclusions: Unlike control subjects, PDC patients showed high mismatching of lateral incisor crowns of similar to 30%.
机译：介绍：本研究的目标是将上颌牙齿的尺寸和形态对称在具有和没有单侧间移位的犬（PDC）中的受试者中的上颌牙齿的大小和形态对称。方法：选择38个受试者的膏药（平均14.75 +/- 0.95 y）（研究组[SG]），与来自年龄和性别匹配对照组（CG）的铸件进行比较。然后扫描两组的牙科铸造成三维（3D）模型。测量SG和CG的牙齿尺寸（叶氏动酶[MD]和BL]宽度和体积）。之后，使用Geomagic Control X软件进行3D偏差分析。所有数据通常根据参数测试分发。结果：Sg的所有上颌齿直径比CG更小。当比较PDC象限的宽度和体积和同一患者的未受影响的象限时，获得统计学上显着的差异（P＆ = 0.001）。通过对SG的表面与表面匹配（PDC侧VS非PDC侧）和CG（右与左象限）的形态齿对称性显着（P <= 0.001），但除了侧向上门外，差异较小（71.27 ％）。结论：与控制受试者不同，PDC患者表现出高侧面切牙冠的不匹配，类似于30％。

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