目的通过对40例牙龈型微笑的深覆牙合患者的治疗，探讨J形钩高位牵引的临床应用。
Objective To investigated the clinical value of J hook in higher traction by treatment of 40 gummy smile deep overbite patients.
目的通过对40例牙龈型微笑的深覆牙合患者的治疗，探讨J形钩高位牵引的临床应用。
Objective To investigated the clinical value of J hook in higher traction by treatment of 40 gummy smile deep overbite patients.
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