下颌第一磨牙半切术后2种材料联冠修复的效果比较

Observation of clinical effect of different prosthetic materials on mandibular first molars after hemisection

目的探讨下颌第一磨牙牙半切术后用金属烤瓷合金或全瓷进行联冠修复的临床效果。方法 54颗下颌第一磨牙行近中半切术后,依患者修复意愿分成2组,烤瓷组27颗患牙,对半切后的患牙和同侧第二前磨牙行金属烤瓷联冠修复;全瓷组27颗患牙,对半切后的患牙和同侧第二前磨牙行全瓷联冠修复。修复后24个月检查2组患牙牙周情况。结果烤瓷组牙周发生改变的17颗(62.96%),其中15颗患牙牙周发生轻度改变,2颗患牙牙周发生重度改变;全瓷组只有1颗(3.70%)牙周发生轻度改变,其余患牙牙周正常。两组间差异有统计学意义(P<0.01)。结论下颌第一磨牙牙半切术后采用联冠修复,全瓷材料联冠修复的临床效果优于金属烤瓷联冠。

Objective To discuss the clinical effect on mandibular first molars with different prosthetics after hemisection.Methods A total of 54 molars received mesial hemisection and root canal therapy（RCT）with the distal roots were divided into two groups.The ceramic united crowns with mandibular second premolars were applied in ceramic group,while PFM united crowns with mandibular second premolars were used in PFM group.The clinical effects were compared after 3 months’follow-up.Results Seventeen cases（62.96%）in PFM group had periodontal changes,in which 15 cases were mild and 2 cases were severe.Only 1 case（3.70%）in ceramic group had mild periondontal changes.There was a statistically significand difference between the two groups.Conclusion The clinical effect of ceramic material is better than PFM on mandibular first molars with united erowns after hemisection.