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介绍了一种可以拆卸的中度正畸矫治支抗加强系统。该系统主要由直径1.2mm的牙用不锈钢丝弯制成的粗唇弓组成,在需要增强支抗的矫治阶段(如尖牙远移、切牙舌移阶段),插入支抗磨牙带环上与之吻合的粗颊侧管内。粗唇弓左右两侧的交互作用以及粗唇弓和颊侧管之间的摩擦力,严格限制了支抗磨牙向近中倾斜及磨牙近中舌向扭转移动,能起到被动支抗加强效能;若在颊侧管近中端给粗唇弓加弯末端内收弯及后倾曲,尚可使磨牙进行支抗预备,即起主动支抗加强效能。粗唇弓前方位于唇系带附着点(牙合)方的口腔前庭,既不压迫牙龈、强撑口唇,也不影响患者外观和口腔功能,口腔不适感小。根据矫治需要可以随时装卸粗唇弓、灵活掌握支抗的大小。实验研究也显示在阻止磨牙近中移动方面,该系统优于腭托及唇挡。
A removable orthodontic brace system is introduced. The system is mainly composed of a rough lip arch made of stainless steel wire with a diameter of 1.2 mm. During the orthodontic stage (such as canine distal movement and incisor lingual movement) that needs enhanced support, the system is inserted into the support molar band Coincident with the buccal side of the tube. The interaction between the left and right sides of the labial arch and the friction between the labial arch and the buccal side of the labial arch severely restrict the proximal and distal tilting of the support molar and the proximal and middle molar shift of the molar, ; If the buccal tube in the proximal end of the rough lip bow plus bend within the bend and after the bow, the molar can be prepared for the support, that is, active support to enhance performance. The front of the rough lip arch is located in the oral vestibule at the point where the lacing tape is attached, neither pressing the gums nor strongly supporting the lips, nor does it affect the appearance and oral function of the patient. The oral discomfort is small. According to the needs of orthodontics can be handling at any time crude lip bow, flexibility to grasp the size of the support. Experimental studies have also shown that the system is superior to the palatal support and lip shield in stopping the proximal movement of the molar.