bite guardbaitɡɑ:d短语⁹⁰⁸⁸⁷⁺⁷ 基本例句 护牙合器,牙合平面板,牙合垫 Objective:To evaluate the maxillary expansion effects of posterior crossbite patients treated with elastic wrapping bite guard and screw expansion mechanic in the mixed dentition. 目的:探讨弹性包绕式垫加螺旋扩弓器矫治替牙期后牙反的适用性及治疗前后的牙颌结构变化。 dictall