Rondahl U S, Bystedt H, Enqvist B, Malmgren O
Department of Orthodontics, Eastman Institutet, Stockholm, Sweden.
Int J Oral Maxillofac Surg. 1988 Jun;17(3):165-9. doi: 10.1016/s0901-5027(88)80023-7.
2 methods of skeletal fixation are compared in 24 patients with maxillary retrusion treated with Le Fort I osteotomy only: group I, intraosseous fixation only (10 patients); group II, enhanced fixation, intraosseous and suspension wires (14 patients). Follow-up checks on the patients were carried out using lateral cephalograms. The changes of the maxillary position in relation to the anterior cranial base were analyzed via a technique of superimposition in a computer system without using conventional landmarks. Vertical and horizontal changes and rotations were studied. The method error was small. In the vertical direction, there was a significant difference between the groups. In group I, the vertical relapse during the early postoperative period was 55%, while in group II, it was only 15%. The conclusion is that a rigid vertical fixation is needed.
在仅接受Le Fort I型截骨术治疗的24例上颌后缩患者中比较了两种骨骼固定方法：第一组，仅采用骨内固定（10例患者）；第二组，采用强化固定，即骨内固定和悬吊钢丝（14例患者）。使用头颅侧位片对患者进行随访检查。通过计算机系统中的叠加技术分析上颌相对于前颅底的位置变化，无需使用传统标志点。研究了垂直和水平变化及旋转情况。方法误差较小。在垂直方向上，两组之间存在显著差异。在第一组中，术后早期垂直复发率为55%，而在第二组中仅为15%。结论是需要进行坚固的垂直固定。
