orthodontics

If baby teeth are lost prematurely, the permanent teeth may erupt malpositioned and require orthodontics later on..如果婴儿过早的失去牙齿，恒牙可能会爆发式的错位长出而需要正畸。

A removable dental appliance, fabricated of wire and plastic, that is worn in the palate and used as a diagnostic or therapeutic aid in orthodontics or prosthodontics..咬合托一种可移动牙科器具，由金属丝和塑料制成，戴于腭上，作为牙齿矫正或修复的诊断或治疗辅助器。

orthodontic treatment,牙矫正术