改良式无基托活动保持器的临床应用王春玲，玉秀印，张本君１．临床资料：我科自１９９３年以来，共收集了２２Ｂ矫正病人，应用无基托活动保持器作保持，其中男例，女１４例，年龄在１２－２２岁之间。２．改良式保持器的制作（见附图）附图改良式无基托活动保持器固位部... Clinical Application of Modified Catheter Holder Wang Chunling, Yu Xiuyin, Zhang Benjun 1. Clinical data: Since 1993, our department has collected a total of 22B orthodontic patients. The patients were treated with a non-hedgehog cage. There were 14 males and 14 females, aged 12-22 years old. 2. Improved retainer production (see attached drawings) Figure improved non-base retainer retainer activity ...