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前牙反■是一种常见的错■畸形,现临床上多应用上■垫式活动矫治器对其矫正,通过舌簧开展上前牙,而对下颌骨及其下前牙无直接矫治力.导弓式活动矫正器是
Anterior teeth ■ is a common mistake ■ deformity, clinical application is more ■ pad active appliance correction, through the tongue to carry out anterior teeth, and the mandible and its lower anterior teeth without immediate correction Guide bow activity brace is