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学科主题: 口腔医学
题名:
前突患者上切牙内收前的牙根吸收状况及因素分析
其他题名: Root resorption and factors analysis of the maxillary incisors before retraction in patients with protrusion
作者: 马宁; 李巍然
关键词: 牙根吸收 ; 上切牙 ; 内收前阶段 ; 危险因素 ; 前突 ; Root resorption ; Maxillary incisor ; Stage before retraction ; Risk factors ; Protrusion
刊名: 中华口腔正畸学杂志
发表日期: 2013
DOI: 10.3760/cma.j.issn.1674-5760.2013.02.007
卷: 20, 期:2, 页:90-94
收录类别: 中国科技核心期刊
文章类型: Journal Article
摘要: 目的 调查前突患者上切牙内收前的牙根吸收状况,并且对该阶段牙根吸收的影响因素进行初步的探索.方法 选择上颌需要拔除双侧第一前磨牙且需要强支抗的前突患者50名,分别于正畸治疗前(T1)和上切牙内收前(T2)拍摄上颌切牙的平行投照根尖片和头颅侧位片,通过测量和评价,得到每颗切牙的牙根吸收量、治疗前牙根形态及上中切牙的角度位置及变化量,并记录其他诊断和治疗因素.对牙根吸收量作描述性统计,对各因素作多因素分析.结果 ①前突患者上切牙内收前,中切牙的牙根吸收平均为(0.73±0.53)mm,侧切牙为(0.84±0.70)mm.②有3%的中切牙和6%的侧切牙牙根吸收大于2mm.③多元线性回归表明T1期牙根形态异常、内收前疗程长、上中切牙根尖距唇侧骨皮质的距离减小量大、T1期U1/PP角小、上颌前部拥挤为中切牙牙根吸收的危险因素.T1期牙根形态异常、上颌前部拥挤、内收前疗程长、T1期牙齿长度长为侧切牙牙根吸收的危险因素.结论 前突患者上切牙内收前有一定量的牙根吸收,个别高危患者其牙根吸收状况较严重.我们的研究因素中存在此阶段与上切牙牙根吸收相关的因素,但这些因素对于牙根吸收的解释仅为30%左右. Objective To investigate root resorption of the maxillary incisors before retraction in patients with protrusion and to explore the possible risk factors.Methods 50 patients with protrusion malocclusion treated with bilateral maxillary first premolars extractions and high anchorage were selected.The periapical radiographs of the maxillary incisors using paralleling technique and cephalograms were obtained before treatment(T1) and before retraction(T2).Root resorption values of each incisor were measured and root forms at T1 were diagnosed.The inclination angle,the position and the changes of the maxillary central incisors were measured.Other diagnosis and treatment parameters were also recorded.Descriptive statistics,multivariate analysis were done.Results ① In the stage before incisor retraction,the average root resorption values were (0.73± 0.53)mm for the central incisors and (0.84±0.70)mm for the lateral incisors.② 3% of the central incisors and 6% of the lateral incisors showed more than 2 mm of root resorption.③ Multivariate linear regression showed that abnormal root morphology,increased T1-to-T2 time period,decreased distance from the root apices to the cortical bone surface,small inclination angle and maxillary anterior crowding were the risk factors for central incisor root resorption.Similarly,abnormal root morphology,maxillary anterior crowding,increased T1-to-T2 time period and long root were the risk factors for the lateral incisors.Conclusions A number of root resorption was found for maxillary incisors before retraction in patients with protrusion,and a small percentage of patients with higher risks had severe root resorption.Some risk factors were found for root resorption of the maxillary incisors in the stage before retraction,but they can only account for 30% of root resorption
语种: 中文
原文出处: 查看原文
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内容类型: 期刊论文
URI标识: http://ir.bjmu.edu.cn/handle/400002259/72018
Appears in Collections:北京大学第三临床医学院_口腔科_期刊论文

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作者单位: 1.北京大学第三医院口腔科
2.100081,北京大学口腔医学院·
3.口腔医院正畸科

Recommended Citation:
马宁,李巍然. 前突患者上切牙内收前的牙根吸收状况及因素分析[J]. 中华口腔正畸学杂志,2013,20(2):90-94.
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