Abstract
A clinico-pathological analysis on 54 cases of benign fibro-osseous lesions of the laws was made and Nomarski reflection microscopic and scanning electron microscopic findings of these lesions were added. These cases were classified according to WHO's classification, i. e. 35 cases of cementoma (including 2 cases of benign cementoblastoma, 8 of cementifying fibroma, 23 of periapical cemental dysplasia, 2 of gigantiform cementoma), 9 of ossifying fibroma, 3 of fibrous dysplasia, 2 of benign osteoblastoma, and 5 other cases which could not be classified as any other diagnosable disease. 13 cases were multiple lesions which were all cementomas.Nomarski reflection microscopy was useful to observe hard tissues and distinguish cementum from bone. The collagen fibers were found to be arranged more crowded than those of the bone and vertical to the cementum according to scanning electron microscopy.
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