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本研究选用9只出生约4个月的幼年狗,在麻醉下拔除其切牙和第一双尖牙计69个,所有牙的根尖均未形成。另外,在每1/4象限颌骨内选一个未受损牙作对照,共36个。拔除的牙被作再植,或移植到对侧牙槽窝,未用外科方法制备牙槽窝。牙在口外的时间不超过10分钟,而且,在此期间牙被置于室温下的无菌生理盐水中。术后1～6天肌注青霉素(每天30万单位)。牙均不予固定。两周内或直至观察前给予软食。观察期选择术后1、4、10、30和180天。到观察期时,狗再次被麻醉。皮下注射
In this study, 9 young dogs aged about 4 months were selected. Under anesthesia, 69 incisors and first bicuspid cusps were removed, and no root tips were found in all teeth. In addition, a unimpaired tooth was selected as a control in each of the 1/4 quadrant jaws for a total of 36 controls. Removal of the tooth was replanted, or transplanted to the contralateral socket, no surgical preparation of alveolar nest. Tooth outside the mouth for no more than 10 minutes, and, during this period the teeth were placed in sterile saline at room temperature. 1 to 6 days after intramuscular penicillin (300,000 units per day). No teeth are fixed. Give the soft drink within two weeks or until observation. The observation period was chosen at 1, 4, 10, 30 and 180 days after surgery. By the time of observation, the dog was anesthetized again. Subcutaneous injection