Helical distraction is superior to linear distraction in maxillary distraction osteogenesis: an in silico study

• Published in: International journal of oral and maxillofacial surgery Vol. 52; no. 9; pp. 971 - 980
• Main Authors: Gateno, J., Kim, D., Bartlett, S., Gonzalez, C., Xu, J., Xia, J.J.
• Format: Journal Article
• Language: English
• Published: Denmark Elsevier Inc 01.09.2023
• Subjects: Distraction osteogenesis; Le Fort Osteotomy; Maxilla; Le Fort Osteotomy; Distraction osteogenesis; Maxilla
• ISSN: 0901-5027; 1399-0020
• DOI: 10.1016/j.ijom.2023.01.020

This in silico kinematic study was performed to evaluate the best attainable outcomes of maxillary distraction osteogenesis given the constraints of linear and helical motion. The study sample included the retrospective records of 30 patients with maxillary retrusion who had been treated with distraction or had been recommended this treatment. The primary outcomes were the errors of linear and helical distraction. The study measured two types of error: misalignment of key upper jaw landmarks and misalignment of the occlusion. Concerning the misalignment of key landmarks, the median misalignments resulting from helical distraction were minimal; the interquartile ranges were also minimal. The median misalignments and interquartile ranges that resulted from linear distraction were significantly larger. Regarding the occlusal misalignments, helical distraction produced minor occlusal misalignments, while linear distraction produced significantly larger errors. The results of this study confirmed that helical motion is the ideal motion for LeFort I distraction.