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釉质基质衍生物是否会影响牙周组织的功能和随后的牙根吸收。在6只成年雄性比格犬上颌骨和下颌切牙上施加唇舌抖动4周后拔牙。一侧上颌切牙移植到另一侧，下颌切牙再植。一侧双侧牙周组织移植到另一侧，植入或不植入釉质基质衍生品。所有动物在自体移植和再植后6~7周处死，解剖标本。吉格力显著增加了牙齿的活动性，显著减少了移植牙和再植牙的拔牙时间和牙根吸收。此外，牙釉质基质衍生材料可显著降低自体移植后牙齿的活动性和牙根吸收，提示正畸抖动和釉质基质衍生材料可作为临床自体牙齿移植的有效工具。

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.