PDF(Pubmed)
Abstract：
Background and Objectives: According to the modified Williams theory, the shape of the maxillary central incisor corresponds to the shape of the maxillary alveolar ridge (dental arch) and the shape of the face. Moreover, the standards of beauty suggest that the center of the face of an individual with a full set of teeth should match the center of the maxillary and mandibular dental arches. The purpose of this study is to conduct a comparative cross-sectional study on the matching of the shape of the face, maxillary central incisor and maxillary dental arch as well as the matching of the midfacial line and dental arches in subjects with complete dentition. Materials and Methods: The study included 90 subjects of both sexes. The matching of the shape of the face and midfacial line, i.e., dental arches and maxillary incisors, was determined by analysing photographs, whereas the shape of the dental arch was determined by analysing plaster models. Results: No significant gender-related differences were found either in the shape of the maxillary central incisor that matched the shape of the maxillary dental arch (p = 0.349) or in the shape of the dental arch that matched the shape of the face (p = 0.697). However, a significant difference was noted in the shape of the teeth that matched the shape of the face (p = 0.043), which was more significantly impaired in men. In addition, the matching of the mid-face and the mid-dental arch was significantly greater in women (p = 0.016). Conclusions: The modified Williams theory was confirmed in most subjects, thus it can be considered a relevant guideline when determining the shape of teeth after their loss. The highest percentage of matching in both sexes was with the shape of the face and dental arch. There was no positive correlation between the middle of the maxillary and mandibular dental arch in most cases.
摘要：
背景和目的：根据修正的威廉姆斯理论，上颌中切牙的形状对应于上颌牙槽脊（牙弓）的形状和面部的形状。此外，美容标准建议，具有全套牙齿的个人的面部中心应与上颌和下颌牙弓的中心相匹配。这项研究的目的是对面部形状的匹配进行比较横截面研究，上颌中切牙和上颌牙弓以及具有完整牙列的受试者的中面线和牙弓的匹配。材料和方法：该研究包括90名男女受试者。面部形状和面部中线的匹配，即，牙弓和上颌切牙,是通过分析照片确定的，而牙弓的形状是通过分析石膏模型确定的。结果：上颌中切牙的形状与上颌牙弓的形状相匹配（p=0.349）或牙弓的形状与面部形状相匹配（p=0.697），均未发现与性别相关的差异。然而,一个显着差异被注意到在牙齿的形状相匹配的脸的形状（P=0.043），在男性中受损更明显。此外,女性中脸和中牙弓的匹配明显更大(p=0.016).结论：修正的威廉姆斯理论在大多数受试者中得到了证实，因此，在确定牙齿脱落后的形状时，可以将其视为相关指南。男女匹配比例最高的是面部和牙弓的形状。在大多数情况下，上颌和下颌牙弓中部之间没有正相关。
