INFLUENCES ON STABILITY FOLLOWING ORTHOGNATHIC SURGERY

正颌外科现在使矫正牙齿和 以前无法治疗的面部畸形。目标是 这个持续的项目的目的是评估形态，临床， 决定因素的技术和生理反应 手术-正畸治疗结果的稳定性。 利用第一个计算机数据库中的现有信息 这个项目的各个阶段以及来自新患者的数据，我们将 测试特定的假设，以探索 患者的原发牙面畸形及其临床治疗 生理适应和形态稳定性的程序 在治疗之后。 在本项目期间，重点将放在 记录长期(5年)稳定性或形态变化； 生理学与人生理学关系的进一步探讨 唇压、鼻阻力和呼吸模式的变量 形态稳定性或复发倾向.关联性检验 在形态稳定或复发倾向之间的模式； 临床变量(方向和方向)之间的相关性检验 颌骨运动、植骨材料、切开方式等。) 和形态稳定性；澄清各种不同的影响 正颌外科手术对颌骨功能的影响 颞下颌关节适应性与咬合力的关系 大小和方向；评估坚固固定的效果 短期和长期使用螺丝钉和/或小型接骨板 稳定性；并检验重新定位下巴的假设 (颧骨成形术)经下缘截骨术显著改变 舌头和嘴唇压力在下门牙之间的平衡 从而改变这些牙齿的稳定位置。研究 以阐明生理适应和形态 手术后的稳定性对改善未来很重要 治疗。这些数据还可以更好地了解 面部畸形问题的病因学阐释 人类变化的影响。

Orthognathic surgery now makes it possible to correct dental and facial deformities that previously could not be treated. The goal of this continuing project is to evaluate the morphologic, clinical, technical and physiologic response factors that determine stability of results from this surgical-orthodontic treatment. Utilizing existing computer data base information from the first phases of this project along with data from new patients, we will test specific hypotheses to explore the relationships of the patient's original dentofacial deformity and clinical treatment procedures to physiologic adaptation and morphologic stability followng treatment. In the present project period, emphasis will be placed on documenting long term (5 year) stability or morphologic changes; further exploration of the relationship between the physiologic variables of lip pressure, nasal resistance and respiratory mode to morphologic stability or relapse tendencies; tests of association between mode to morphologic stability or relapse tendencies; tests of association between clinical variables (direction and nagnitude of jaw movement, graft material, type of incision, etc.) and morphologic stability; clarifying the effects of various orthognathic surgery procedures on jaw function and indicated by temporomandibular joint adaptation and by occlusal force magnitude and direction; evaluating the effects of rigid fixation with screws and/or small bone plates on short and long term stability; and testing the hypothesis that relocating the chin (genioplasty) via lower border osteotomy significantly alters the balance between tongue and lip pressures across the lower incisors and thereby changes the stable position of these teeth. Research of this type to clarify physiologic adaptation and morphologic stability following surgery is important to improve furture treatment. The data also can provide a better understanding of the etiology of facial deformity problems by illustrating the effect of changes in humans.