Improving properties of nano hydroxyapatite by mixing it with chitosan and composite of chitosan and collagen the composite coating composed of nano-hydroxyapatite chitosan and collagen on commercially pure titanium show the best result mechanically and histologically when tested at a 2healing period (2 and 6 weeks) all these attempts of altering the surface properties of titanium by coating or by topographical modifications is to improve osseointegration and minimize the healing period.