从上颌磨牙(或双根的前磨牙)的近中侧向远中侧,将牙齿分切成为颊、舌侧两半;或下颌磨牙由颊侧向舌侧分切成近、远中两半,然后拔除有病变的那一半,利用保留的部份作为基础进行固定修复,这种方法称为半切术(Hemisection)。早在1886年G.V.Black就提出并作过半切术,此后随着牙髓病学、牙周病学、矫形学的理论和治疗技术的发展,牙科材料和修复方法的不断创新和改进,半切术也得到了提高。近年来,Gleikman,Frank,Ingle等均在其新著中有半切术专章论述,因此半切术既是一种较老的方法,也是在不断开展和前进中的探索。在常规方法不可能获得成功的时候才采用半切术。它的优点:(1)保持了牙列的完 From the maxillary molars (or premolar double root) to the far side of the medial, the teeth split into the buccal and lingual halves; or mandibular molars from the buccal to the lingual side of the sub-cut into the proximal and distal halves , And then remove the lesion that half, using the retained part of the basis for fixed repair, this method is called hemiectomy (Hemisection). As early as 1886, GV Black proposed and made a hemisectomy. Since then, with the development of the theory and treatment of endodontics, periodontics and orthopedics, the continuous innovation and improvement of dental materials and repair methods, It has also been improved. In recent years, Gleikman, Frank, Ingle and others have discussed the topic of hemisection in their new book, so that hemisection is both an older method and an exploration of continuous progress and progress. Hemotomy is used when conventional methods are not likely to succeed. Its advantages: (1) to keep the dentition finish