Loh S, Heng J K, Ward-Booth P, Winchester L, McDonald F
Department of Orthodontics and Paediatric Dentistry, Guy's King's and St Thomas' Dental Institute, London, UK.
Int J Oral Maxillofac Surg. 2001 Aug;30(4):259-63. doi: 10.1054/ijom.2001.0089.
This retrospective study analysed the accuracy and reliability of predictions generated in patients treated with orthognathic surgery by comparing Quick Ceph Image software (Quick Ceph Image Pro version 3.0) predictions with post-surgical lateral cephalographs. Pre- and post-surgical lateral cephalographs of 28 adult patients (12 males and 16 females) were scanned into the computer and 28 landmarks were identified and digitized. Digitization error was assessed from repeated digitization. Fourteen measurements of the predicted and actual postsurgical hard tissue landmarks were compared using Student's t-test. Results showed a good correlation between repeated digitization for all measurements. Student's t-test indicated that 10 of the 14 measurements showed no statistically significant differences. Only the ANB (P=0.008), FMA (P=0.001), SN-Mxl (P=0.03) and Wit's (P=0.0001) showed statistically significant differences between the predicted and actual measurements. However only the Wit's showed clinical significant differences between the two measurements. Caution still must remain as the surgeon may not achieve his planned position in an individual patient. In some cultures there may also be medico-legal implications of these predictions.
这项回顾性研究通过比较Quick Ceph Image软件（Quick Ceph Image Pro 3.0版）的预测结果与术后头颅侧位片，分析了正颌外科手术患者预测的准确性和可靠性。将28例成年患者（12例男性和16例女性）的术前和术后头颅侧位片扫描进计算机，识别并数字化28个标志点。通过重复数字化评估数字化误差。使用学生t检验比较预测的和实际的术后硬组织标志点的14项测量值。结果显示所有测量值的重复数字化之间具有良好的相关性。学生t检验表明，14项测量值中有10项无统计学显著差异。仅ANB（P = 0.008）、FMA（P = 0.001）、SN-Mxl（P = 0.03）和Wit's（P = 0.0001）在预测测量值和实际测量值之间显示出统计学显著差异。然而，只有Wit's在两次测量之间显示出临床显著差异。由于外科医生可能无法在个体患者中达到其计划的位置，仍必须谨慎。在某些文化中，这些预测也可能存在医疗法律问题。
