Renick B M, Symington J M
Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, University of Toronto, Ontario, Canada.
J Oral Maxillofac Surg. 1991 Oct;49(10):1061-5; discussion 1065-6. doi: 10.1016/0278-2391(91)90139-d.
Computed tomography (CT) was used postoperatively to assess the pterygomaxillary region in 12 orthognathic surgery patients who had had a Le Fort I osteotomy. Although pterygomaxillary separation was successful in all cases, in only 41.6% of the sides did fractures of the plate not occur. The incidence of low pterygoid plate fracture was 37.5% and that of high pterygoid plate fracture was 25%; 4.2% of sides showed a maxillary tuberosity fracture. Multiple fractures were observed in 8.3% of separated plates. Of 17 pterygoid plates judged clinically to be intact, only 10 were intact as assessed by CT. The significance of these findings and application of CT to evaluation of modifications to the Le Fort I osteotomy is discussed.
对12例行Le Fort I型截骨术的正颌外科患者术后采用计算机断层扫描（CT）评估翼上颌区域。尽管所有病例的翼上颌分离均成功，但仅有41.6%的术侧未发生钢板骨折。低位翼突板骨折的发生率为37.5%，高位翼突板骨折的发生率为25%；4.2%的术侧出现上颌结节骨折。在分离的钢板中，8.3%观察到多处骨折。临床判断为完整的17块翼突板中，经CT评估仅有10块完整。讨论了这些发现的意义以及CT在评估Le Fort I型截骨术改良中的应用。
