Strauss R A, Weis B D, Lindauer S J, Rebellato J, Isaacson R J
Department of Oral and Maxillofacial Surgery, Medical College of Virginia, School of Dentistry, Richmond 23298, USA.
Int J Adult Orthodon Orthognath Surg. 1997;12(3):197-203.
Facial photographs are commonly used preoperatively for recording and analyzing skeletofacial and dentofacial deformities prior to orthodontics and/or orthognathic surgery. This study was undertaken to determine the reproducibility of facial photographs over time in any individual patient. Twenty subjects had full-facial frontal and lateral, frontal smile, and lip-to-tooth length (incisor show at rest) photographs taken on 5 different days over a 7- to 14-day period. A total of 18 linear and angular measurements were made on each set of photographs. Standard errors of the 18 measurements over time were generally moderate but varied widely, suggesting that facial photographs have the potential to provide reliable diagnostic information in some cases. In any individual patient, however, there were some variations within measurements that were clinically unacceptable. Measurements made from pictures of the smile were significantly less reliable than those taken at rest, and measurements of vertical head posture and lower lip length were found to be the least reliable. This study suggests that some measurements from facial photographs are generally reproducible over time, but significant individual variations do occur.
面部照片通常在正畸和/或正颌手术前用于记录和分析骨骼面部及牙颌面畸形。本研究旨在确定面部照片在任何个体患者中随时间的可重复性。20名受试者在7至14天内的5个不同日期拍摄了全脸正面和侧面、正面微笑以及唇齿长度（静止时切牙暴露情况）照片。对每组照片进行了总共18项线性和角度测量。随着时间推移，这18项测量的标准误差总体适中，但差异很大，这表明面部照片在某些情况下有可能提供可靠的诊断信息。然而，在任何个体患者中，测量值存在一些临床上不可接受的变化。从微笑照片进行的测量比静止时拍摄的测量可靠性明显更低，并且发现垂直头部姿势和下唇长度的测量最不可靠。本研究表明，面部照片的一些测量值通常随时间具有可重复性，但确实会出现显著的个体差异。
