摘要
目的 :推导切牙合功能时 ,髁状突向前下方运行的距离及生理意义。方法 :通过 5 0例头颈标本作经颞下颌关节区的断层摄影 ,测量影像的关节窝深度和关节窝前壁斜度后 ,结合前牙的覆盖距离 ,用三角公式推导髁状突在下颌前伸功能运动时 ,运行的可能范围。结果 :关节窝前壁平均长约 9mm ,与水平面夹角平均 46.6° ,关节窝前半径宽平均为 6.2mm ,关节窝平均深 6.5mm ;计算获得下颌前伸对刃时 ,髁状突向前下方滑行平均 5 .3mm的距离。结论 :在下颌的前伸功能运动中 ,髁状突的运行范围受限于关节窝前壁的制导作用 ,这对牙合稳定和关节健康有重要的生理意义。
Objective:How distant the condyle moved to protrusive and its function importance for incisors occlusion.Method:It was measured that articular fossa depth and its anterior wall tilted degree of tempromandibular joint with radiograph and overjet was measured on 50 cases specimen. Having been measured numbers , it was calculated and infered on mandibular protrusive distance-rang with math. formula.Result:The articular fossa anterior wall length is means 9 mm, and angle on horizotal plane is about 46.6 degrees. The articular fossa depth is means 6.5 mm and its anterior radius is about 6.2 mm. The condyle was about moved 5.3 mm to inforanterior for mandibular protrusion and incisors occlusion.Conclusion:The movement of condyle was limited and guided up fossa anterior wall on mandibular protrusive function movements . It is important for occlusion steady and joint healthy.
出处
《临床口腔医学杂志》
2004年第5期293-294,共2页
Journal of Clinical Stomatology
关键词
下颌前伸运动
HE
颞下颌关节
口腔生理学
mandibular protrusion
occlusion
tempromandibular joint
physiology
