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The influence of cementum extracts on the initial attachment of osteoblast has been measured by using the rat of cell attachment. The attachment index after 1,3, and 6 d, and the orientation index after 3 and 6 d have been obtained by the image analysis. It is observed that the extracts of cementum enhance the attachment and migration of osteoblast on the polished titanium surface. It is proposed that the cementum extracts can be used as the implantal coating materials in order to achieve an ideal osteointegration.