开牙合，通过检查摄全景片和X线头测定，开合分为Ⅲ度，主要会影响面部外形，甚至导致牙周及上呼吸道感染。
目的研究“摇椅形”弓丝对前牙开牙合畸形的矫治效果。
Objective To study the effect of the application of reverse-curve arch wire for the treatment of anterior open bite.
方法：244例牙髓炎患牙随机分二组，分别从牙合面和牙颈部开髓完成干髓术，比较疗效。
Methods: 244 teeth with pulpitis were randomly divided into two groups and then mummification of dental pulp were performed through occlusal surface or cervical surface.
应用推荐