替牙期前牙反会是临床上常见的错合畸形，如不及时矫治会使上颌骨发育受限而导致颜面畸型。传统的矫治方法是双曲唇弓与合垫的联合应用，由于这种矫治器可自行揭戴常造成患者的不配合，而影响效果。我科自1995年以来应用2X4矫治技术矫正替牙期前牙反合刀例随访2年，临床效果良? Anti-premolars will be clinically common before the tooth misconception, if not timely correction of maxillary growth restriction will lead to facial deformity. The traditional orthodontic method is the combined application of hyperbolic lip arch and co-pad, which can affect the effect because the device can expose the patient often by itself. Our department since 1995 2X4 orthodontic technique to correct the tooth period of anterior teeth combined knife 2 years follow-up, good clinical effect?