牙冠延长术中牙根暴露量对患牙远期疗效的影响  

Influence of different root exposure in long-term effect of crown lengthening

作　　者：陈芳[1] 韦纪英[1] 张君[1] 邢向辉[2] 

机构地区：[1]遵义医学院附属口腔医院修复科,贵州遵义563003 [2]第四军医大学口腔科,西安710032

出　　处：《重庆医学》2014年第9期1044-1046,共3页Chongqing medicine

基　　金：国家自然科学基金资助项目(30901675)

摘　　要：目的分析牙冠延长术中牙根暴露量对患牙远期疗效的影响。方法选取2010年8月至2012年10月于遵义医学院附属口腔医院接受牙冠延长术的110例患者,共142颗患牙,其中前牙66颗,前磨牙46颗,磨牙30颗。将所有患牙分为观察组与对照组,两组前牙、前磨牙、磨牙3个牙位的患牙均为33颗、23颗及15颗。观察组术中的牙根暴露量为3mm,对照组为4mm,比较两组术后的临床疗效。结果对照组术后3个月的前牙松动度要明显高于观察组(P<0.05);两组其余患牙手术前后松动度比较,差异无统计学意义(P>0.05);观察组术后3个月前牙、前磨牙及磨牙的出血指数要明显高于对照组(P<0.05);两组其余时间患牙的出血指数比较,差异无统计学意义(P>0.05);观察组与对照组所有患牙手术后牙周袋深度及附着丧失比较,差异无统计学意义(P>0.05)。结论 3mm与4mm的牙根暴露量均能够在牙冠延长术中获得良好的临床疗效,但从美观的角度出发,前牙的牙根暴露量应取3mm。Objective To study the influence of different root exposure in long-term effect of crown lengthening .Methods To-tally 142 teeths（66 of the front teeths ,46 of premolars teeths ,30 of molars teeths ） of 110 patients collected from August 2010 to October 2012 in stomatological hospital to affiliated zunyi medical college were chosen as research subjects ,then they were randomly divided into the experimental group and the control group .There were 33 anterior teeths ,23 premolar teeths and 15 molar teeths in each group .The experimental group accepted 3 mm root exposure while the control group accepted 4 mm root exposure .The post-operative effect of the two groups was compared .Results The tooth mobility of the anterior cases of control group after 3 months was statistically higher than that of the experimental group （P＆lt;0 .05） and the difference of tooth mobility between the two groups in other teeths and times was not statistically significant （P＆gt;0 .05） .The bleeding index after 3 months ,the anterior teeths ,premo-lar teeths and molar teeths of the experimental group was statistically higher than that of the control group （P＆lt;0 .05） ,while the difference of tooth mobility between the two groups in other times was not statistically significant （P＆gt;0 .05） .The postoperative probing difference of depth and attachment loss between the two groups showed no statistically significant （P＆gt;0 .05） .Conclusion The root exposure of 3 mm and 4 mm both have a significant effect in crown lengthening .But for the aesthetic point of view ,3 mm should be taken as the root exposure of the anterior cases .

关 键 词：牙冠伸长术 治疗效果 牙根暴露量 

分 类 号：R783[医药卫生—口腔医学]