下颌第二磨牙牙冠延长术后疗效观察及其风险因素分析  

Clinical Observation and Risk Factors Analysis of Crown Lengthening of Mandibular Second Molar

作　　者：贾彦 于寰 张研 石雪 王志涛 张正 JIA Yan;YU Huan;ZHANG Yan;SHI Xue;WANG Zhitao;ZHANG Zheng(.1.Department of Periodontol-ogy,Tianjin Stomatological Hospital,School of Medicine,Nankai University,Tianjin 300041,China;Tianjin Key Laboratory of Oral and Maxillofacial Function Reconstruction,Tianjin 300041,China.)

机构地区：[1]天津市口腔医院,南开大学医学院,天津300041 [2]天津市口腔功能重建重点实验室,天津300041

出　　处：《口腔医学研究》2024年第2期130-135,共6页Journal of Oral Science Research

基　　金：天津市卫生健康行业高层次人才培养项目(编号:TJSQNYXXR-D2-114);天津市口腔医院重点学科建设项目(编号:2022P12)。

摘　　要：目的:观察下颌第二磨牙牙冠延长术后治疗效果,确定其风险因素;探讨风险因素个数对其疗效的影响。方法:纳入2019~2021年于天津市口腔医院接受牙冠延长术的下颌第二磨牙314颗。6周复查时,按照拟定标准将其分为效果良好组和效果欠佳组。筛选影响两组患牙疗效的风险因素,并分析其数量与治疗效果的相关性。结果:314颗患牙中,成功者占88.54%,失败者为11.46%。龈缘-断端距离(P<0.01)、术前断端-嵴顶距离(P=0.032)及牙根形态(P=0.006)是影响术后疗效的风险因素。随着风险因素数量的增加,手术失败率呈线性增长的趋势,风险因素达到3个时,失败风险明显增高(P<0.01)。两者之间呈正相关(P<0.01)。结论:龈缘-断端距离、术前断端-嵴顶距离及牙根形态是影响冠延长疗效的风险因素,其数量与手术失败率之间呈正相关,风险因素达到3个时,失败风险明显增高,需谨慎选择适应证。Objective:To observe the treatment outcome of crown lengthening on mandibular second molars,determine the distribution of risk factors,and explore the influence of the number of risk factors on the effect of crown lengthening.Methods:A total of 314 mandibular second molars were included from the patients visited our hospital from 2019 to 2021.At 6-week follow-up,the patients were divided into successful group and failed group.The risk factors that affected the curative effect of two groups were screened,and the correlation between the number of them and the curative effect was analyzed.Results:Of the 314 teeth,88.54%had good results and 11.46%had poor results.The distance between gingival margin and the broken end(P<0.01),the distance between gingival margin and crest(P=0.032),and the shape of root(P=0.006)were the risk factors influencing the postoperative outcome.As the number of risk factors increased,the rate of surgical failure increased linearly,and when the number of risk factors reached 3,the risk of failure increased significantly(P<0.01).There was a positive correlation between them(P<0.01).Conclusion:The distance between gingival margin and broken ends,the distance between preoperative broken ends and crest,and the shape of root are the risk factors that influence the effect of crown lengthening.There was a positive correlation between the number of risk factors and the rate of surgical failure(P<0.01).When the number of risk factors reached 3,the risk of surgical failure increased significantly,and the indication should be chosen carefully.

关 键 词：下颌第二磨牙 牙冠延长术 治疗效果 风险因素 

分 类 号：R782.1[医药卫生—口腔医学]