And 4 weeks after ovariectomy ( or sham operation), orthodontic wire were used to ligature the cervix of each first molar and then feed with high glucose softy foods to cause experimental periodontitis. 分别于卵巢切除术(或假手术)2周和4周后结扎上颌第一磨牙牙颈部,并以高糖软食喂养,形成实验性牙周炎。
A Study of the Frictional Force of Bracket-wire-ligature Structure 托槽-弓丝-结扎丝结构的磨擦力研究
Purpose To explore the method and clinical effect of treating fresh patella fractures by way of steel wire ring ligature through skin puncture. 目的探索采用经皮穿刺钢丝环扎术治疗新鲜髌骨骨折的方法和效果。