颌骨良性纤维骨性病变为异原性而又复杂的一组肿瘤或反应性病变,其纤维结缔组织间质可分化为牙骨质样组织或骨组织。关于其命名,分类或病变性质,意见尚有分歧。本文报告45例此类病变。年龄分布为6～70岁,平均年龄20.7岁。女33例,男12例。下颌骨与上颌骨之比为23:22。所有患者均经切除和刮除术。5例术后复发。经第2次广泛切除证实治愈。镜检分为下述4型:(1)牙骨质性纤维瘤(13例):均呈弥漫性肿大的无痛性、无触 The benign fibrous bone lesions of the jaws are a heterogeneous and complex group of tumors or reactive lesions, whose fibrous connective tissue stroma can differentiate into cementum-like tissue or bone tissue. Regarding their naming, classification, or the nature of the disease, opinions are still divided. This article reports 45 cases of such lesions. The age distribution ranged from 6 to 70 years and the average age was 20.7 years. 33 females and 12 males. The ratio of the mandible to the maxilla is 23:22. All patients underwent resection and curettage. 5 cases of recurrence. The second extensive resection confirmed the cure. Microscopic examination was divided into the following 4 types: (1) cementofibroma (13 cases): painless, non-palpable with diffuse swelling