第一前磨牙自体移植替代上颌切牙——用于评估牙周间隙的三维容积断层扫描
Autotransplantation of first premolar to replace a maxillary incisor - 3D-volume tomography for evaluation of the periodontal space.
作者信息
Harzer Winfried, Rüger Daniel, Tausche Eve
机构信息
Department of Orthodontics, Technical University of Dresden, Dresden, Germany.
出版信息
Dent Traumatol. 2009 Apr;25(2):233-7. doi: 10.1111/j.1600-9657.2008.00733.x.
UNLABELLED
The anterior maxilla is the most traumatized region during childhood and tooth loss is frequently involved. Space closure with implants is contraindicated in growing patients and maintenance of space is necessary over a long period. Transplantation of premolars from the mandible with two-third to three-quarter root formation wide open foramen provides the best prognosis for permanent survival.
CASE REPORT
This report describes the management of a 10 year old girl with autotransplantation to replace an upper incisor by a lower premolar under consideration of special care for the periodontal ligament during surgical procedure. A 3-D imaging with digital volume tomography (DVT) was used 20 months after transplantation to evaluate the periodontal morphology.
DISCUSSION
Autotransplantation of premolars with incomplete root formation to replace maxillary incisor is a treatment alternative after traumatic loss of teeth. There were no signs of pathosis like resorption or ankylosis and a normal periodontal space demonstrated with DVT. There is no need for endodontic treatment before transplantation. In this case of autotransplantation of a premolar, the DVT after 20 months gives evidence of a successful regeneration of the periodontal ligament.
未标注
上颌前部是儿童期最易受创伤的区域,常伴有牙齿缺失。种植体关闭间隙在生长发育期患者中是禁忌的,长期保持间隙很有必要。将下颌前磨牙牙根形成三分之二至四分之三、根尖孔开放的牙齿进行移植,永久存活的预后最佳。
病例报告
本报告描述了一名10岁女孩的治疗情况,在手术过程中特别注意牙周韧带,采用自体移植用一颗下颌前磨牙替换一颗上颌切牙。移植20个月后使用数字容积断层扫描(DVT)进行三维成像,以评估牙周形态。
讨论
牙根未完全形成的前磨牙自体移植以替换上颌切牙是牙齿外伤缺失后的一种治疗选择。没有出现诸如吸收或强直等病变迹象,DVT显示牙周间隙正常。移植前无需进行牙髓治疗。在这例前磨牙自体移植病例中,20个月后的DVT证明牙周韧带成功再生。