牙列重度磨耗对面高度的影响

目的 探讨重度磨耗对面高度的影响。方法 用Willis（威利斯）垂直测量尺测量牙列重度磨耗患者和正常对照组面中高，姿势位面下1／3高度（垂直距离），牙尖交错位面下1／3高度。结果牙列重度磨耗患者垂直距离显著低于对照组（P〈0.05）；而面中高及息止盼间隙与对照组之间未见显著性差异（P〉0．05）；磨耗组面中份高度与垂直距离间有显著性差异（P〈0．001）；而对照组面中高与垂直距离之间差异无统计学意义（P〉0.05）。结论 牙列重度磨耗可导致垂直距离降低但息止耠间隙并未增大。

Effect of severe dental attrition on facial height

Objective To explore the effect of severe dental attrition on facial height.Methods All subjects,with at least 27 teeth,were selected from the patients visiting the clinic of temporomandibular disorders(TMD)of West China Stomological Hospital from 1999 to 2001 with complaints of TMD problems.Among them,64 cases with severe dental attrition and 40 cases without obvious dental attrition were included into test group and control group respectively.Middle facial height(MFH),vertical dimension in postural position(PPD)and vertical dimension in intercuspal position(IPD)of all subjects were measured with Willis ruler.Results There was significant difference in PPD between patients with severe dental attrition and the control(P<0.05).No significant difference for MFH was found between the two groups.There was significant difference between MFH and PPD in the test group(P<0.001),while there was no significant difference between MFH and PPD in control group(P>0.05).Conclusion Severe dental attrition can result in the decrease of facial height,but no increase of free way space.