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

为探讨拔牙前正畸微动或釉基质衍生物对牙再植或自体移植后牙周组织功能及牙根吸收的影响，在6只成年雄性比格犬上、下颌切牙拔牙前施加唇舌微动力4周。将一侧上颌切牙移植到另一侧，下颌切牙再植。将一侧双颌P1牙胚移植到另一侧牙胚上，并与釉基质衍生物进行比较。所有动物于自体移植和再植后6 ~ 7周处死，解剖标本。结果表明，摇动力能显著增加移植牙和再植牙的活动度，缩短拔牙时间，降低牙根吸收。此外，釉基质衍生物还能显著降低自体牙移植和再植后的牙松动度和牙根吸收，提示正畸微动和釉基质衍生物是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.