orthotist

例句：

1. 1. Dr. Smith specializes in orthodontics.
   史密斯博士专攻正畸学。
2. 2. The orthodontic appliance helps correct the patient's bite.
   正畸装置有助于纠正患者的咬合问题。
3. 3. Orthodontists are trained to treat patients with dental issues.
   正畸医生受过训练，专门治疗牙齿问题。