摘要
目的探讨单侧第三磨牙伸长对颞下颌关节(TMJ)结构与功能的影响。方法收集单侧上、下颌第三磨牙伸长以及无第三磨牙伸长的患者各50例,拍摄牙尖交错位时双侧TMJ薛氏位片,定点测量双侧TMJ间隙,并计算髁突在关节窝中的位置,运用统计学方法对结果进行分析。结果实验1组两侧间隙除30°和150°外,其他差异均有统计学意义(P<0.05);实验2组仅90°和120°差异有统计学意义(P<0.05)。实验1组未伸长侧髁突在水平方向上位于后位的比例与对照组比较差异有统计学意义(P<0.05)。两实验组出现干扰的比例及实验1组出现咀嚼肌及关节区疼痛、TMJ弹响、开口型异常等的比例与对照组间比较差异有统计学意义(P<0.05)。结论单侧第三磨牙伸长可改变TMJ间隙,致使髁突移位,引起关节疼痛、弹响等功能障碍。
Objective To investigate the effect of unilateral hyper-erupted third molar on the structural and functional of temporomandibular joints. Methods 150 individuals, 100 with unilateral hyper-erupted third molars（50 upper and 50 lower）and 50 without hyper-erupted third molars, were enrolled in present study. All subjects were taken transcranial radiogram of bilateral temporomandibular joints at intercnspal position. Linear measurements of TMJ space which were also determined condyle positions were performed. The results were analyzed by statistical method. Results There was statistical differences in the changes of all spaces except 30°and 150° in the first test group（ P 〈0.05 ） and only 90°and 120° in the second test group （P 〈0. 05 ）. There was statistical differences between the first test group and the control group when condyle was in the posterior in 0° and 180° directions （P 〈 0.05）. There was also statistical differences between the first test group and the control group in the ratios of jaw muscle pain, clicking and opening type changed, and both occlusal interference between the test groups and the control group（P 〈0.05）. Conclusion Unilateral hyper-erupted third molar may change the temporomandibular joint space, cause condylar movement, and consequently produce dysfunctions like jaw pain and clicking.
出处
《安徽医科大学学报》
CAS
北大核心
2009年第6期759-762,共4页
Acta Universitatis Medicinalis Anhui
