Rubenstein L K, Strauss R A, Lindauer S J, Davidovitch M, Isaacson R J
Department of Orthodontics, VCU/MCVC School of Dentistry, Richmond, Virginia 23298-0566.
Int J Adult Orthodon Orthognath Surg. 1993;8(3):203-9.
The stability of sagittal split osteotomy advancements is not always 100% predictable. Assessment of postsurgical changes has historically relied on clinical evaluation of dental changes and superimposition of serial cephalograms, both of which have been shown to have serious drawbacks. A technique that improves the analysis of postsurgical changes is described in this paper; tantalum pin implants are placed in the osteotomized segments of patients undergoing surgical advancements. Implants eliminate many of the problems (orthodontic, growth, and remodeling changes) related to superimposition of presurgical and postsurgical cephalograms. Using this technique, surgical changes can be precisely analyzed, and the contribution of each factor of postsurgical relapse can be determined. This information, concerning the magnitude and direction of postsurgical changes, aids in following an individual's progress and increases the accuracy of large group studies by eliminating sources of variability in radiographic and clinical interpretation.
矢状劈开截骨术推进的稳定性并非总是100%可预测的。历史上，对术后变化的评估一直依赖于牙齿变化的临床评估和系列头颅侧位片的叠加，而这两者都存在严重缺陷。本文介绍了一种改进术后变化分析的技术；在接受手术推进的患者的截骨段中植入钽钉。植入物消除了许多与术前和术后头颅侧位片叠加相关的问题（正畸、生长和重塑变化）。使用该技术，可以精确分析手术变化，并确定术后复发各因素的作用。这些关于术后变化大小和方向的信息，有助于跟踪个体的进展，并通过消除影像学和临床解释中的变异性来源，提高大型群体研究的准确性。
