不同牙根暴露量牙冠延长术对不同牙位疗效研究  

Clinical observation of crown lengthening surgery for different teeth and different root exposure

作　　者：任国亨[1] 赵溪达[2] 

机构地区：[1]沈阳市口腔医院,沈阳110001 [2]中国医科大学附属口腔医院牙周科,沈阳110001

出　　处：《中国实用口腔科杂志》2012年第5期310-312,320,共4页Chinese Journal of Practical Stomatology

摘　　要：目的评价不同牙根暴露量的牙冠延长术对不同牙位的疗效。方法选择2007年1月至2011年1月沈阳市口腔医院拟行牙冠延长术的患者122例,共148颗患牙(前牙68颗、前磨牙48颗和磨牙32颗)。各牙位根据牙冠延长术中牙根暴露量(3或4mm)随机等分。检查术前及术后1个月、6个月和1年的出血指数、牙齿松动度、牙周袋深度和附着丧失,并进行比较。结果牙冠延长术中牙根暴露量为3mm时,术后各患牙均未出现松动,在术后1个月时均出现牙龈出血,术后6个月和1年牙龈出血得到改善;牙根暴露量为4mm时,术后1个月前牙出现松动,在术后6个月及1年恢复稳定,前磨牙和磨牙在术后均未出现松动。所有患牙的牙周袋深度和附着丧失在治疗后均有较明显的改善。结论术中牙根暴露3mm和4mm远期疗效均满意;为了获得更多的临床牙冠实现更好的修复条件,暴露牙根最好在4mm左右;而考虑到前牙美观问题,建议在前牙区术中牙根暴露量最好控制在3mm以内。Objective To evaluate the efficacy of crown lengthening surgery on different teeth and different root expo- sure. Methods Totally 148 teeth of 122 patients were chosen as research subjects, then were divided into anterior（68 cases）, premolar （48 cases） and molar （32 cases）groups. Exposure of the root was limited to the amount of 3 mm and 4 mm by crown lengthening surgery, according to which the cases were divided into two groups randomly. Compare the in- dex of bleeding index, tooth mobility, probing depth and loss attachment one month, six months and twelve months after crown lengthening surgery with those before the surgery. Results In the 3mm group, there was significant difference of bleeding index between before and one month after crown lengthening surgery （P 〈 0.01 ）. Six months and twelve months later, tooth mobility did not show any significant difference （P 〉 0.05 ）. In contrast with the 4mm group, there was signifi- cant difference in tooth mobility between before and one month after crown lengthening surgery in anterior （P 〈 0.01 ）, and six months and twelve months later we didn＇ t find any significant difference （P 〉 0.05 ）. The remaining premolar and molar didn＇ t show this significant difference. We got significant improvement on probing depth and attachment loss in all cases. Conclusions The long-term outcome is satisfactory on 3 mm and 4 mm group. In order to get longer clini- cal crown and better restorative treatment, it＇ s better to control the root exposure at 4 mm. Taking into account the anteri- or aesthetic problems, we propose the root exposure of anterior be controlled at 3 ram.

关 键 词：牙冠延长术 牙根暴露量 Periotest法 Florida探针 生物学宽度 

分 类 号：R78[医药卫生—口腔医学]