Burke P H
Department of Child Dental Health, School of Clinical Dentistry, Sheffield.
Br J Orthod. 1992 Nov;19(4):273-85. doi: 10.1179/bjo.19.4.273.
Three children suffering from facial asymmetry were observed annually using facial stereophotogrammetry before, during, and after their general skeletal adolescent growth spurt. Stereophotogrammetry allows accurate three-dimensional measurements between identifiable facial landmarks. Five pairs of bilateral parameters connecting external canthi and angles of the mouth to alae and tip of nose, and to each other, allowed a positive sign (right-side larger) or a negative (left-side larger) assessment of parameter asymmetry. Their total, taking sign into account, assessed mid-facial asymmetry. Serial observation showed that: (1) in patient no. 1 suffering from post-traumatic condylar hypoplasia, the facial asymmetry resolved; (2) in patient no. 2 suffering from unilateral facial hypoplasia, the asymmetry, which was severe, reduced with adolescence, but did not resolve; (3) in patient no. 3 suffering from fibro-osseous dysplasia of left maxilla, the asymmetry was reduced by surgery, but the full effects of the surgery were not measurable until over 1 year after operation; subsequently, the asymmetry began to increase again.
对三名面部不对称的儿童在青春期骨骼全面生长突增之前、期间及之后每年进行面部立体摄影测量观察。立体摄影测量法可对可识别的面部标志之间进行精确的三维测量。五对连接外眦、口角至鼻翼和鼻尖以及相互之间的双侧参数，可对参数不对称进行正向（右侧较大）或负向（左侧较大）评估。将符号考虑在内，它们的总和可评估面中部不对称情况。系列观察结果显示：（1）1号患者患有创伤后髁突发育不全，面部不对称得以解决；（2）2号患者患有单侧面部发育不全，严重的不对称情况在青春期有所减轻，但未解决；（3）3号患者患有左上颌骨纤维性骨发育异常，手术使不对称情况减轻，但直到术后1年多才能测量到手术的全部效果；随后，不对称情况又开始再次加重。
