BACKGROUND The aim of this study was the comparison of male and female upper and lower dental arch form in untreated Italian patients by 3D analysis, to find differences in shape, in transversal and longitudinal diameters between sexes, and to give a representative set of population's dental arch to clinicians in order to provide suitable orthodontic treatment. METHODS The sample consisted of 3D scans of dental casts deriving from 104 Italian untreated patients (Male = 35, Female = 69) in permanent dentition. An evaluation of the arch form was performed by angular and linear values on every patient using a 3D software (SolidWorks®). A Student's two-tailed t test was used to determine if the differences in measurements between the male and female groups were significant and the level of significance was set at P < 0.05. RESULTS Statistically significant differences in upper and lower transversal and longitudinal diameters were found. Male arch widths were significantly larger than those of females. Male intercanine, intermolar, and interpremolar diameters were significantly greater than females. Dental arch depth was significantly smaller in the female group. Anterior upper dental arch form was flatter, wider, and less sharp in the female group. CONCLUSIONS Basing on the anatomical arches differences found between sexes concerning Italian patients, it is suggested to have regard to each patient pre-treatment arch form, width, and depth during orthodontic treatment according to gender.

中文翻译：

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意大利人群中牙弓形态的三维分析。

背景技术这项研究的目的是通过3D分析比较未接受治疗的意大利患者的男女上，下牙弓形状，以发现性别，横向和纵向直径的差异，并给出一组具有代表性的人群牙齿向临床医生拱门，以提供适当的正畸治疗。方法该样本包括对来自104名意大利永久性牙列未经治疗的患者（男性= 35，女性= 69）的牙模进行3D扫描。使用3D软件（SolidWorks®）通过对每个患者的角度和线性值进行弓形评估。使用学生双尾t检验确定男性和女性组之间的测量差异是否显着，显着性水平设置为P <0.05。结果发现上下横向和纵向直径在统计学上有显着差异。男性足弓宽度明显大于女性。男性犬齿间，臼齿间和前臼齿的直径明显大于女性。女性组的牙弓深度明显较小。在女性组中，前上牙弓形态较平坦，较宽且较不锋利。结论基于意大利患者在性别上的解剖学弓形差异，建议在正畸治疗期间根据性别考虑每个患者的治疗前弓形，宽度和深度。男性犬齿间，臼齿间和前臼齿的直径明显大于女性。女性组的牙弓深度明显较小。在女性组中，前上牙弓形态较平坦，较宽且较不锋利。结论根据意大利患者性别在解剖学上的差异，建议在正畸治疗期间根据性别对每位患者的治疗前牙弓的形式，宽度和深度加以考虑。男性犬齿间，臼齿间和前臼齿的直径明显大于女性。女性组的牙弓深度明显较小。在女性组中，前上牙弓形态较平坦，较宽且较不锋利。结论根据意大利患者性别在解剖学上的差异，建议在正畸治疗期间根据性别对每位患者的治疗前牙弓的形式，宽度和深度加以考虑。