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目前认为,牙周疾病主要由牙菌斑所引起,而牙齿形态发育异常,就可提供菌斑的聚集和停滞。因此,在牙周组织损害中,菌斑滞留和牙体形态异常二者有密切的关系。1964年,Masters等人报道了一个发生在下颌第一磨牙颊侧面的急性牙槽脓肿,在脓肿发生前,牙周组织基本健康,但在根分义处发现有一明显釉质突起,认为脓肿与釉质突起有关。1975年Andrew报道一例,在右下颌第二磨牙颊侧可探到有一9mm深牙周袋,X光片证实有牙周组织及骨的破坏,在拔除患牙后,也发现一个明显的颊面釉质突起伸向根分义区。上
Currently, periodontal disease is mainly caused by plaque, and abnormal tooth morphology, can provide plaque accumulation and stagnation. Therefore, in the periodontal tissue damage, plaque retention and tooth morphology are closely related to both. In 1964, Masters et al. Reported on an acute alveolar abscess that occurred on the buccal surface of the first mandibular first molars. Before the abscess, periodontal tissue was basically healthy, but a clear enamel protrusion was found at the root meanings. It was considered that abscesses and enamel Protrusion related. An example was reported in Andrew in 1975. There was a 9-mm deep periodontal pocket on the buccal side of the second molar of the right lower jaw. The X-ray film confirmed the destruction of periodontal tissue and bone. After the removal of the affected tooth, a clear buccal surface was also found Enamel protuberances extend to the root zone. on