Kingston and St George's Hospitals, St George's Medical School, London, United Kingdom.
Maxillofacial and Odontostomatology Unit, School of Dentistry, University of Milan, Milan, Italy.
J Craniomaxillofac Surg. 2019 Aug;47(8):1310-1316. doi: 10.1016/j.jcms.2019.06.002. Epub 2019 Jun 9.
The purpose of this investigation is to describe a potentially useful analysis in assessing the required extent of sagittal chin augmentation or set-back, by relating chin prominence to lower lip position using the 'lower lip-chin prominence angle'. The secondary aim was to quantitatively evaluate the influence of this angle on perceived attractiveness and desire for surgery. Having described this angular analysis, a quantitative evaluation was undertaken by incrementally altering the angle on an idealised profile image to create a range of images that were rated on a 7-point Likert scale by a pre-selected group of pre-treatment orthognathic patients, clinicians and laypeople. In treatment planning alterations in chin prominence, an 'ideal' sagittal position with soft tissue pogonion on or just behind a true vertical line through the most prominent point of the lower lip may be used. Chin retrusion or prominence up to an angle of 15° retrusion to -5° prominence is deemed acceptable. Surgery is desired from chin prominence of greater than -15° and retrusions greater than 25°. The greater the retrusion or prominence of the chin from an angle of 0°, the less the perceived attractiveness and the greater the desire for surgical correction.
本研究旨在描述一种潜在有用的分析方法，通过使用“下唇-颏突角”将颏突与下唇位置相关联，来评估矢状位颏部增强或后退所需的程度。次要目的是定量评估该角度对面部吸引力和手术需求的影响。在描述了这种角度分析后，通过在理想的侧貌图像上逐步改变角度，创建一系列图像，并由一组预先选择的术前正颌患者、临床医生和非专业人士进行 7 分制 Likert 评分评估。在治疗计划中改变颏突程度时，可以使用软组织颏前点位于或刚好位于下唇最突出点正下方的真垂直线上的“理想”矢状位置。颏后缩或突出在 15°后缩至-5°突出范围内是可接受的。从大于-15°的颏突和大于 25°的后缩需要手术。从 0°角度看，颏部的后缩或突出越大，吸引力越低，对手术矫正的需求越大。
