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近些年来文献上除有不少不完全冠-根折的论述和报道外,因牙髓治疗所引起的牙纵折、纵型根折的病例报道亦不少。虽然有人曾指出牙齿折裂也偶见于牙周支持减少时,但对于非牙髓治疗所引起的牙根折裂报道却甚少。我们在牙周病下颌磨牙标本收集中观察到11例无龋牙周病患牙伴有根裂;对此我们进行了临床和组织学的观察,由于所有根裂的形式均呈纵型,因此我们称之为纵型根裂。
In recent years, in addition to the literature there are many incomplete crown - root fracture expositions and reports, due to dental pulp treatment caused by vertical longitudinal fracture, longitudinal root fracture case report is also a lot. Although it has been pointed out that tooth fractures are occasionally associated with reduced periodontal support, there are few reports of tooth root fracture caused by non-endodontic treatment. We observed 11 cases of tooth-free periodontal disease with root dehiscence in the collection of periodontal disease mandibular molars; for which we conducted clinical and histological observations, and since all of the root dehiscences were in longitudinal form, We call it vertical root split.