Ellis E, Throckmorton G, Sinn D P
Department of Oral and Maxillofacial Surgery, University of Texas, Southwestern Medical Center, Dallas 75235-9109, USA.
Int J Adult Orthodon Orthognath Surg. 1996;11(3):211-23.
The purposes of this investigation were to compare functional performance between controls and a sample of patients with skeletal anterior open bite prior to surgical correction and to examine how the patients' oral motor function adapted after treatment. Five female patients with skeletal open bite malocclusion were treated with Le Fort I osteotomy and compared to sex-, size-, and age-matched controls. Measurements of skeletal morphology, mandibular range of motion, occlusal force, and muscle efficiency were taken on all subjects over time. Prior to surgery, all patients had lower occlusal forces than did controls at all bite positions. After surgery, occlusal forces at several occlusal positions increased significantly from the presurgical recordings but remained below the level of controls. The mechanical advantages of the muscles of mastication were not significantly different between controls and patients either before or after surgery. The results of this study suggest that correction of skeletal open bite malocclusion may improve occlusal force, but a larger sample is needed to confirm this finding.
本研究的目的是比较手术矫正前骨骼性前牙开患者样本与对照组之间的功能表现，并研究患者治疗后的口腔运动功能如何适应。对5例骨骼性开牙合错牙合的女性患者进行了Le Fort I截骨术治疗，并与性别、体型和年龄匹配的对照组进行比较。随着时间的推移，对所有受试者进行了骨骼形态、下颌运动范围、咬合力和肌肉效率的测量。术前，所有患者在所有咬合位置的咬合力均低于对照组。术后，几个咬合位置的咬合力较术前记录有显著增加，但仍低于对照组水平。咀嚼肌的机械优势在术前和术后对照组与患者之间均无显著差异。本研究结果表明，骨骼性开牙合错牙合的矫正可能会提高咬合力，但需要更大的样本量来证实这一发现。
