State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China.
Department of Orthodontics and Pediatric Dentistry, University of Michigan School of Dentistry, Ann Arbor, MI, USA.
Orthod Craniofac Res. 2024 Feb;27(1):139-150. doi: 10.1111/ocr.12697. Epub 2023 Aug 3.
The visible maxillary arch width (VAW) is an important aesthetic-determining feature. To date, there is no well-established methodology to determine the aesthetically optimal VAW in customized treatment planning.
In this study, the common traits of the dentofacial configuration were investigated in most attractive Asian and Caucasian female smiles. The smiling photo of a subject was digitally modified based on combined variations of VAW, smile width (SW), transverse facial dimensions (TFD), and vertical facial dimensions. These modified photos were assessed for aesthetics. The aesthetically essential parameters were identified, and their mathematic correlations and reference ranges were determined for different vertical facial patterns. Using the obtained results, a mathematic guidance was constructed for customized smile designing. The applicability of this guidance was tested in Asian females.
The most attractive Asian and Caucasian female smiles have intraracial and interracial commonalities in the VAW-to-TFD ratios. The interparopia width (IPD) predominated over facial widths in determining well-matched VAW and SW. For optimal smile aesthetics, the VAW and SW were correlated as simulated by the formula 1.92 IPD ≤ VAW + 2.3 SW ≤ 2.17 IPD, plus the VAW-to-IPD ratio within 0.54 to 0.62 and the SW-to-IPD ratio within 0.61 to 0.71, ranges tailored to vertical facial patterns. This constitutes a mathematic guidance for customized planning of the aesthetically optimal VAW. This guidance was preliminarily validated to be applicable to Asian females.
The VAW-to-TFD ratios were essential for Caucasian and Asian female smile aesthetics. The mathematic guidance could serve as a reference for customized smile designs for Asian females.
可见上颌弓宽度（VAW）是一个重要的美学决定因素。迄今为止，还没有一种成熟的方法来确定定制治疗计划中美学上最佳的 VAW。
本研究旨在探讨最具吸引力的亚洲和高加索女性微笑中牙颌面形态的共同特征。基于 VAW、微笑宽度（SW）、横向面型尺寸（TFD）和垂直面型尺寸的综合变化，对受检者的微笑照片进行了数字化修改。对这些修改后的照片进行了美学评估。确定了美学上必不可少的参数，并确定了不同垂直面型模式下这些参数的数学相关性和参考范围。利用所得结果，构建了用于定制微笑设计的数学指导。在亚洲女性中测试了该指导的适用性。
最具吸引力的亚洲和高加索女性微笑在 VAW 与 TFD 的比值方面具有种族内和种族间的共同特征。在确定匹配良好的 VAW 和 SW 方面，面间宽度（IPD）比面宽更重要。为了获得最佳的微笑美学效果，VAW 和 SW 通过公式 1.92 IPD ≤ VAW + 2.3 SW ≤ 2.17 IPD 进行模拟，其中 VAW 与 IPD 的比值在 0.54 至 0.62 之间，SW 与 IPD 的比值在 0.61 至 0.71 之间，这些范围是根据垂直面型量身定制的。这构成了定制规划美学上最佳 VAW 的数学指导。该指导初步验证适用于亚洲女性。
VAW 与 TFD 的比值对高加索和亚洲女性的微笑美学至关重要。该数学指导可作为亚洲女性定制微笑设计的参考。
