Edler Raymond, Wertheim David, Greenhill Darrel
Orthodontic Department, Norman Rowe Maxillofacial Unit, Queen Mary's Hospital, Roehampton, London, UK.
Am J Orthod Dentofacial Orthop. 2004 Apr;125(4):435-43. doi: 10.1016/j.ajodo.2003.05.005.
This study related clinical assessments of the severity of mandibular asymmetry with computerized measurements, obtained by digitizing mandibular outlines from standardized facial photographs. Four ratios were calculated: area (size), compactness (shape), perimeter (length of outline), and moment (center of area). When comparing clinical severity with computer assessment, significant correlations were observed; those for area and compactness were the highest. Sixteen patients subsequently underwent corrective surgery, and their ratios were used to relate the degree of improvement to the original severity of the asymmetry. The posttreatment ratios were also used to audit the outcome, comparing the patients' scores as a group with results previously obtained from patients with normal symmetry and mild asymmetry. Posttreatment outcomes were significantly different from the normal outline group but were comparable with outcomes of patients with mild mandibular asymmetry. The system provided a sensitive, noninvasive method of assessing treatment change and could be useful in providing an objective means of quantifying treatment outcomes.
本研究将下颌不对称严重程度的临床评估与通过对标准化面部照片中的下颌轮廓进行数字化处理获得的计算机测量结果相关联。计算了四个比率：面积（大小）、紧致度（形状）、周长（轮廓长度）和矩（面积中心）。在将临床严重程度与计算机评估进行比较时，观察到显著的相关性；面积和紧致度的相关性最高。随后，16名患者接受了矫正手术，并使用他们的比率来关联改善程度与不对称的原始严重程度。治疗后的比率还用于评估结果，将患者作为一个群体的得分与先前从对称性正常和轻度不对称患者获得的结果进行比较。治疗后的结果与正常轮廓组有显著差异，但与轻度下颌不对称患者的结果相当。该系统提供了一种敏感、无创的方法来评估治疗变化，并且在提供量化治疗结果的客观手段方面可能有用。
