Saint Joseph University of Beirut, Faculty of Dental Medicine, Orthodontic Department, Beirut, Lebanon.
Saint Joseph University of Beirut, Faculty of Dental Medicine, Orthodontic Department, Beirut, Lebanon.
Int Orthod. 2023 Sep;21(3):100784. doi: 10.1016/j.ortho.2023.100784. Epub 2023 Jun 16.
The main objective of this study was to evaluate the different factors influencing the perception of female profile facial beauty in Class III patients with protruded mandible that can be treated with orthodontic dental compensation: (1)severity of the protrusion, (2) the upper incisors inclination and (3) the presence of jawlines. The secondary objective was to determine if the rater's gender and profession played a role in the assessment of the preferred profile.
A normal and smiling photographs of a female subject with normal facial and skeletal profile criteria were digitally manipulated to obtain 3 different mandibular sagittal positions: 0mm, +4mm and +8mm. Each position of the chin was evaluated with the presence or not of jawlines. In the smiling profiles, the same chin modifications were scored, and the maxillary incisor inclination was changed from 0 to +10 degrees with 5 degrees increments. A total of 320 raters (107 dentists, 103 orthodontists and 110 laypeople) scored the attractiveness of the different images using a Visual Analogue Scale. The limit of statistical significance was P<0.05. Generalized estimating equation (GEE) models were conducted to assess the predictors of variations in ratings within each set of photos, as well as the interactions of predictors where adjusted odds ratios (aOR) and their 95% confidence intervals were calculated and reported.
In the profiles without a smile, image +4mm chin (Class III treated by compensation) and image +8-mm mandible (Class III not treated) were selected as the most and least attractive images, respectively, by almost all groups with no difference. The presence of jawlines has a positive role in facial attractiveness. In the smiling profiles, all the examiners showed a preference for image +4-mm chin and a slight protrusion of maxillary incisors (+5 degrees). No significant difference was found between genders in this study.
Class III treated by compensation (+4mm) are more attractive than non-treated Class III (+8mm) by almost all groups with no difference. The presence of jawlines has a positive role in facial attractiveness. In the smiling profiles, all the examiners showed a preference for image +4-mm chin and a slight protrusion of maxillary incisors (+5 degrees). Orthodontists older than 50 years old are aware of the difficulty to treat a skeletal Class III and tend to accept it due to their long career experience. No significant difference was found between genders in this study.
本研究的主要目的是评估影响下颌前突患者（颏部后缩）女性侧貌美观感知的不同因素，这些患者可通过正畸牙代偿治疗：（1）前突严重程度；（2）上切牙倾斜度；（3）下颌线的存在。次要目的是确定评估者的性别和职业是否会影响其对理想侧貌的评估。
通过数字手段对一位具有正常面部和骨骼形态的女性患者的正常和微笑照片进行操作，以获得 3 种不同的下颌矢状位置：0mm、+4mm 和+8mm。评估每个颏部位置时，均考虑下颌线的存在与否。在微笑照片中，对相同的颏部修改进行评分，并使上颌切牙倾斜度从 0 度增加到+10 度，每 5 度增加一次。共有 320 名评价者（107 名牙医、103 名正畸医生和 110 名普通大众）使用视觉模拟量表对不同图像的吸引力进行评分。统计显著性界限为 P<0.05。使用广义估计方程（GEE）模型评估每组照片中评分变化的预测因素，以及调整后的优势比（aOR）及其 95%置信区间的预测因素之间的相互作用。
在没有微笑的侧貌中，几乎所有组都选择了+4mm 颏部（代偿性治疗的 III 类）和+8mm 下颌（未治疗的 III 类）作为最有吸引力和最没有吸引力的图像，差异无统计学意义。下颌线的存在对面部吸引力有积极作用。在微笑照片中，所有检查者都更喜欢+4mm 颏部和上颌切牙轻度突出（+5 度）。本研究中未发现性别差异。
几乎所有组都认为补偿性 III 类（+4mm）比未治疗的 III 类（+8mm）更有吸引力，差异无统计学意义。下颌线的存在对面部吸引力有积极作用。在微笑照片中，所有检查者都更喜欢+4mm 颏部和上颌切牙轻度突出（+5 度）。50 岁以上的正畸医生由于其长期的职业经验，更能意识到治疗骨骼 III 类的难度，并倾向于接受它。本研究中未发现性别差异。
