摘要
目的探讨使用磨牙竖直矫治器辅助矫治下颌阻生第二磨牙的临床应用的效果。方法选取16例下颌第二磨牙阻生患者,采用直丝弓矫治器联合磨牙竖直簧矫治阻生磨牙,分别测量治疗前后磨牙角度及其远颊尖高度、支抗磨牙远颊尖高度、牙周袋深度、牙槽骨相对高度,同时比较分析拔除第三磨牙组、拔除前磨牙组与非拔牙矫治组对磨牙竖直治疗周期差异。结果所有纳入矫治的阻生磨牙均得到良好的矫治。拔除第三磨牙组、拔除前磨牙组与非拔牙矫治组阻生磨牙竖直时间分别为(1.34±0.45)个月、(2.20±0.57)个月、(2.30±0.45)个月,拔除第三磨牙组治疗时间比其他两组缩短,差异有统计学意义(P<0.05)。治疗后阻生第二磨牙倾斜度平均增加(25.94±8.85)°;伸长的远颊尖平均被压低(1.00±1.48)mm;阻生第二磨牙近中牙周袋深度减少(1.21±1.03)mm;阻生第二磨牙近中邻面牙槽骨高度相对增加(4.57±1.45)mm,差异有统计学意义(P<0.05)。治疗前后支抗第一磨牙远颊尖高度变化不显著,差异无统计学意义(P>0.05)。结论磨牙竖直矫治器辅助矫治阻生下颌第二磨牙高效、可靠、方便,能够缩短治疗周期。拔除拥挤的第三磨牙利于阻生第二磨牙的竖直及牙周健康。
Objective To investigate the effect of the clinical application of molar uprighting in the treatment of im-pacted mandibular second molars.Methods A total of 16 cases of impacted mandibular second molars were chosen,and the impacted molars were treated with straight wire appliances and molar uprighting.Before and after treatment,thevertical angle of the molar,the height of the distal buccal tip,the height of the distal buccal tip of the anchorage molar,the depth of the periodontal pocket and the height of the alveolar bone were measured.Moreover,the treatment cycles ofthe third molar extraction group,the premolar group and the nonextraction group were compared.Results All impact-ed molars responded well to treatment.The vertical time of impacted molars was(1.34±0.45)months,(2.20±0.57)months,and(2.30±0.45)months in the third molar extraction group,the premolar extraction group and the nonextrac-tion group,respectively.The treatment time of the third molar extraction group was shorter than that of the other twogroups,and the difference was statistically significant(P<0.05).After treatment,the inclination of impacted second mo-lars increased by(25.94±8.85)°,the elongated distal buccal tip was depressed by(1.00±1.48)mm,the depth of theproximal and middle periodontal pocket of impacted molars decreased by(1.21±1.03)mm,and the height of the alveo-lar bone of the proximal and middle adjacent surfaces of impacted second molars increased by(4.57±1.45)mm;thesedifferences were statistically significant(P<0.05).There was no significant difference in the height of the distal buccaltip of the first molar before and after treatment(P>0.05).Conclusion Molar uprighting is an efficient,reliable,andconvenient method that can shorten the treatment period.Extraction of crowded third molars is beneficial for the verticaland periodontal health of impacted second molars.
作者
李宁
杨柳
王洪宁
王铁军
LI Ning;YANG Liu;WANG Hongning;WANG Tiejun(Department of Orthodontics,Yantai Hospital of Stomatology,Yantai 264000,China;Department of Prosthodontics,Yantai Hospital of Stomatology,Yantai 264000,China)
出处
《口腔疾病防治》
2020年第10期641-645,共5页
Journal of Prevention and Treatment for Stomatological Diseases
基金
烟台市科技发展计划(2015WS066)。
关键词
正畸
阻生牙
磨牙竖直簧
下颌第二磨牙
近中倾斜
倾斜度
远颊尖高度
近中牙周袋探测深度
近中牙槽骨高度
orthodontics
impacted teeth
molar uprighting
mandibular second molars
mesially inclined
inclination
height of distal buccal cusp
probing depth of mesial periodontal pocket
height of mesial alveolar bone
