摘要
目的:了解正畸治疗患者应用种植支抗作为强支抗与根吸收的关系,并与常规矫治比较。方法:收集2003-06/2005-08在青岛大学医学院附属医院口腔正畸科就诊的成人双颌前突患者12例病例资料。其中种植支抗组6例采用微螺钉种植体(Microscrew Anchorage System,M.A.S.西安中邦钛生物制品有限公司)辅助正畸治疗,非种植支抗组6例采用常规方法进行矫治。两组设计均为拔除4颗第一前磨牙,每侧以相同的力值滑动关闭间隙,内收上下前牙。根据正畸治疗前后全口曲面断层片和记存模型,测量计算出治疗前后切牙的全长。结果:参加实验患牙均进入结果分析,无牙齿脱落现象发生。两组患者正畸治疗后均有根吸收发生(P<0.05)。种植支抗组的根吸收量明显大于非种植支抗组(P<0.01)。此外,根据对测量结果的分析可以得知,上颌中切牙及下颌中切牙在治疗过程中的根吸收现象更为明显,根吸收量均大于侧切牙。结论:双颌前突病例拔牙内收矫治后,切牙牙根均有不同程度吸收。应用种植支抗矫治后,切牙牙根吸收更为明显。
AIM： To study preliminarily the correlation between apical resorption and implant-anchorage in patients undergoing orthodontic treatment, and compare it with routine orthodontic treatment.
METHODS Twelve cases of bimaxillary protrusion were selected from Department of Orthodontics, Affiliated Hospital of Qingdao University Medical School between June 2003 and August 2005. Microscrew implantation （Microscrew Anchorage System, MA.S. Xi＇an Zhongbang Titanium Bio-medical Product Inc.） was used as implant anchorage in 6 cases of implant-anchorage group to assist orthodontic treatment, and normal orthodontic treatment was used in non-implant-anchorage group （n =6）. Four premolars of all subjects were extracted; the space was closed and the anterior teeth were retracted with the same sliding force. The length of incisors was measured and calculated through panoramic radiograph and record model of pre- and post-treatment.
RESULTS： All teeth were involved in the result analysis with no loss of tooth. Apical resorption occurred in both groups （P 〈 0.05）, especially in implant-anchorage group （P 〈 0.01）. In addition, the result of the study showed that apical resorption was mainly found in medial incisors of both maxilla and mandible compared with lateral incisors.
CONCLUSION： Apical resorption occurs in the protrusion cases that need to be extracted and retracted. Implant-anchorage treatment makes the apical resorption more severe in incisors.
出处
《中国组织工程研究与临床康复》
CAS
CSCD
北大核心
2007年第44期8873-8876,共4页
Journal of Clinical Rehabilitative Tissue Engineering Research
