(一)基托制做同一般活动矫治器。由基托、固位卡.唇弓等组成,但在第二双尖牙及第一磨牙之间通过—0.7毫米不锈钢丝,其一端埋入舌侧塑料基托内,经两牙及邻外展隙并折向颊侧,在频侧牙龈处,离开牙龈纹2毫米弯制一圈簧,圈簧的作用便于灵活调节拉钩位置的高低、长短、如使尖牙 (A) the basis of the system to do the same activity appliance. By the base, retention card. Lip bow and other components, but between the second bicusp teeth and the first molar through -0.7 mm stainless steel wire, one end embedded in the plastic base of the lingual tongue, the two teeth and adjacent  Abduction gap and folded to the buccal side of the gums on the side of the frequency, leaving gums 2 mm curved loop of spring, the role of coil spring to facilitate flexible adjustment of the level of the hook position, such as the canine