Posterior orthodontic locking is a relatively common clinical malocclusion, which can manifest as individual teeth locking or multiple teeth locking, affecting the occlusal function of the patient and posing a hazard to aesthetics and oral health. In addition to buccolingual misalignment, locked teeth often have vertical and proximal and distal mesial misalignment, and sometimes show severe crowding of the posterior teeth. There are many orthodontic methods for posterior clasping, such as modified palatal bar palatal traction correction, implant support technique, palatal bar or palatal arch retraction, planar guides combined with reciprocal support, fixed appliance archwire correction, and extraction orthodontic methods. However, among the many orthodontic methods, three-dimensional control of the teeth is the key to treating posterior locking.