改变犬牙引导对侧方运动时髁突运动的影响。
Effect of altered canine guidance on condylar movement during laterotrusion.
作者信息
Ogawa M, Ogawa T, Koyano K, Suetsugu T
机构信息
Department of Removable Prosthodontics, Kyushu University, Fukuoka, Japan.
出版信息
Int J Prosthodont. 1998 Mar-Apr;11(2):139-44.
PURPOSE
The purpose of this study was to investigate the effect of an altered inclination of the canine guidance on the pattern of the condylar movements during laterotrusion.
MATERIALS AND METHODS
The inclination of the canine guidance was steepened approximately 10 degrees by attaching a metal overlay to the lingual surface of the maxillary working-side canine. The laterotrusive movements of 20 young adults were measured using a three-dimensional mandibular movement analyzing system before and after alteration of the canine guidance. The difference between anterior, lateral, and inferior components of the working- and nonworking-side condylar movements, the Bennett angle, and the sagittal inclination of the nonworking-side condylar path before and after steepening of the canine guidance was evaluated by a paired t test.
RESULTS
After the canine guidance was steepened, the working-side condyle moved even more anteriorly and inferiorly. In contrast, little change was found in the direction and the amount of the nonworking-side condylar movement.
CONCLUSION
The results of this study suggest that there is a relationship between the steepness of canine guidance and the pattern of the working-side condylar movement. but not between the steepness of the canine guidance and the pattern of the nonworking-side condylar movement.
目的
本研究旨在探讨改变尖牙引导斜度对侧方运动时髁突运动模式的影响。
材料与方法
通过在上颌工作侧尖牙舌面附着金属覆盖物，将尖牙引导斜度增大约10度。在改变尖牙引导斜度前后，使用三维下颌运动分析系统测量20名年轻成年人的侧方运动。采用配对t检验评估尖牙引导斜度增大前后工作侧和非工作侧髁突运动的前、侧、下分量、Bennett角以及非工作侧髁突路径的矢状倾斜度之间的差异。
结果
尖牙引导斜度增大后，工作侧髁突向前下方移动更多。相比之下，非工作侧髁突运动的方向和幅度变化不大。
结论
本研究结果表明，尖牙引导斜度与工作侧髁突运动模式之间存在关系，但与非工作侧髁突运动模式之间不存在关系。
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