Treatment of lower second premolar agenesis by autotransplantation:: four-year evaluation of eighty patients
Treatment of lower second premolar agenesis by autotransplantation:: four-year evaluation of eighty patients
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DOI：
10.1080/000163599429002
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发表时间：
1999-04-01
影响因子：
2
通讯作者：
Valerius-Olsson, H
中科院分区：
文献类型：
--
作者：
Josefsson, E;Brattström, V;Valerius-Olsson, H
第二下前磨牙发育不全的发生率为2.5% ~ 4%。在生长患者中，早期拔除乳牙并随后关闭间隙是一种常见的治疗方法，但在某些情况下，间隙关闭被认为不太可能，自体移植是一种替代方法。本研究的目的是分析自体移植替代缺失的下第二前磨牙的结果，并评估相关的术前正畸治疗。材料包括1988- 1989年期间在斯德哥尔摩伊士曼研究所口腔外科所有移植到下第二前磨牙区域的患者的记录。记录了以下变量：性别、年龄、移植牙数量、供牙、牙根发育、受体位置、正畸治疗、持续的临时磨牙、先天性缺失牙总数、负责的外科医生以及临床和放射学随访变量。110颗移植牙中，有99颗牙根形成未完成，11颗牙根形成完成。4年后的成功率分别为92%和82%。前磨牙和磨牙都是供牙，但主要的供牙是上第二前磨牙。14%的人只因为移植而接受了正畸治疗，即为供牙打开空间。自体移植治疗第二下前磨牙发育不全预后良好。在生长个体中，移植不仅维持了牙槽嵴的生长和发育，而且为发育不全提供了永久的解决方案。
The frequency of agenesis of the second lower premolar is 2.5-4%. In growing patients, early extraction of the deciduous molar and subsequent closure of the space is a common therapy, but in some cases space closure is deemed unlikely and autotransplantation is an alternative. The aim of the study was to analyze the outcome of autotransplantation in replacing missing lower second premolars and to evaluate the associated presurgical orthodontic treatment. The material consisted of records of all patients with teeth transplanted to the lower second premolar region during the period 1988-89 at the Department of Oral Surgery, Eastman Institute, Stockholm. The following variables were registered: sex, age, number of transplanted teeth, donor tooth, root development, recipient site, orthodontic treatment, persisting temporary molar, total number of congenitally missing teeth, the surgeon responsible, and clinical and radiological follow-up variables. Of 110 transplanted teeth, 99 had not completed root formation, and in 11 teeth the root formation was completed. The success rates after 4 years were 92% and 82%, respectively. Both premolars and molars served as donor teeth, but the main donor tooth was the upper second premolar. Fourteen percent had been orthodontically treated only because of the transplantation, i.e. to open the space for the donor tooth. Treatment of agenesis of the second lower premolar by autotransplantation has a good prognosis. In growing individuals the transplant not only maintains growth and development of the alveolar ridge but also provides a permanent solution to the agenesis.