常見例句雙語例句Methods To adopt screw expansion appliance to gradually expand posterior and anterior dental arch with 18~33 day activation and 3~6 month retainment.方法采用螺旋擴大矯治器進行前牙和后牙的擴弓,加力18~33天,戴用保持器3~6個月。 返回 anterior expansion arch