Babaee Hemmati Yasamin, Zahed Ghazal, Falahchai Mehran
Department of Orthodontics, Dental Sciences Research Center, School of Dentistry, Guilan University of Medical Sciences, Rasht, Iran.
School of Dentistry, Guilan University of Medical Sciences, Rasht, Iran.
Int J Dent. 2025 Jul 30;2025:4232915. doi: 10.1155/ijod/4232915. eCollection 2025.
Limited studies are available regarding the position of occlusal plane and dental midline in asymmetrical faces, and most of them only evaluated the preferences of laypeople. Thus, this study aimed to assess the preferences of laypeople, general dentists, and dental specialists regarding the position of transverse occlusal plane (TOP) and dental midline in asymmetrical faces. In this analytical cross-sectional study, 20 facial photographs were designed, including one photograph of a symmetrical facial model (SFM), three photographs of asymmetrical faces with a left shift of the chin and nose (asymmetrical facial model [AFM]1), canted interpupillary line (IPL; AFM2), and canted commissure line (CL; AFM3), six photographs of asymmetrical faces with different dental midline shifts to the right and left, and four photographs of asymmetrical faces with altered position of TOP relative to the IPL and CL. The photographs were rated by 334 raters using a 4-point Likert scale. Data were statistically analyzed (α = 0.05). According to the opinion of all raters, photographs with 1 and 2 mm of midline deviation in the same direction as the chin and nose deviation had no significant difference with AFM1 ( > 0.05). According to the opinion of laypeople, general dentists, and oral and maxillofacial (OMF) surgeons, this difference was not significant for photographs with 1 mm of midline shift in the opposite direction ( > 0.05). No significant difference was found in raters' preferences regarding the position of TOP in AFM2 and AFM3 ( > 0.05), except for prosthodontists and general dentists who preferred parallel position of TOP to the horizon in AFM2. Clinicians and specialists tend to tolerate mild asymmetries more than laypeople. While demographic traits had limited impact overall, professional expertise played a significant role in shaping esthetic preferences.
关于不对称面部中咬合平面和牙中线的位置，现有研究有限，且大多数研究仅评估了外行人的偏好。因此，本研究旨在评估外行人、普通牙医和牙科专家对不对称面部中横向咬合平面（TOP）和牙中线位置的偏好。在这项分析性横断面研究中，设计了20张面部照片，包括一张对称面部模型（SFM）照片、三张下巴和鼻子向左偏移的不对称面部照片（不对称面部模型[AFM]1）、倾斜的瞳孔间线（IPL；AFM2）和倾斜的口角线（CL；AFM3）、六张牙中线向左右不同偏移的不对称面部照片，以及四张TOP相对于IPL和CL位置改变的不对称面部照片。334名评分者使用4点李克特量表对照片进行评分。对数据进行统计学分析（α = 0.05）。根据所有评分者的意见，牙中线向与下巴和鼻子偏移相同方向偏移1毫米和2毫米的照片与AFM1相比无显著差异（P>0.05）。根据外行人、普通牙医和口腔颌面外科（OMF）医生的意见，牙中线向相反方向偏移1毫米的照片差异不显著（P>0.05）。除了口腔修复医生和普通牙医在AFM2中更喜欢TOP与地平线平行的位置外，评分者对AFM2和AFM3中TOP位置的偏好没有显著差异（P>0.05）。临床医生和专家比外行人更倾向于容忍轻微的不对称。虽然人口统计学特征总体影响有限，但专业知识在塑造审美偏好方面发挥了重要作用。
