ESTABALISHMENY OF AUTOTRANSPLANTATION OF TEETHAND BANK FOR CONSIDERING FUNCTION OF PERIODONTAL LIGAMENT

本研究的目的是确定拔牙前正畸抖动或牙釉质基质衍生物是否会影响牙齿再植或自体移植后牙周组织的功能和随后的牙根吸收。6只成年雄性beagle犬，在拔牙前对上、下颚门牙施加唇舌抖动力4周。一侧上颌切牙移植到另一侧，下颌切牙再植。将一侧双腋P1移植到另一侧，有或无牙釉质基质衍生物。所有动物在自体移植和再植后6 ~ 7周处死，并解剖标本。制备用于组织学和荧光学研究。颤振力显著提高了移植和再植牙的活动性，显著减少了拔牙时间和根吸收。此外，牙釉质基质衍生物显著降低了自体移植和再植后牙齿的活动度和牙根吸收。结果表明，正畸摇牙和牙釉质基质衍生物可作为临床自体牙移植的有效工具。

The objectives of the present study were to determine whether pre-extraction orthodontic jiggling or enamel matrix derivative could affect the function of periodontium and subsequent root resorption after replantation or autotransplantation of teeth.In 6 adult male beagle dogs, a labio-lingual jiggling force was applied to the incisors for 4 weeks in maxilla and mandible before extraction. Maxillary incisors in one side were transplanted to the other side, and the mandibular incisors were replanted. Bimaxillarly P1 in one side were transplanted to the other side with or without enamel matrix derivative. All animals were sacrificed 6 to 7 weeks after the autotransplantation and replantation, and the dissected specimen. were prepared for histological study and fluorescence study.Jjiggling force significantly increased tooth mobility, significantly decreased extraction time and root resorption of transplanted and replanted teeth. In addition, enamel matrix derivative significantly decreased tooth mobility and root resorption after autotransplanation and replantation.These results suggest that orthodontic jiggling and enamel matrix derivative would be effective tools for clinical autotransplantation of teeth.