S. W. Ibrahim and W. . A. Al Nakkash, “Mechanical evaluation of nano hydroxyapatite, chitosan and collagen composite coating compared with nano hydroxyapatite coating on commercially pure titanium dental implant”, J Bagh Coll Dent, vol. 29, no. 2, pp. 42–48, Jun. 2017, doi: 10.12816/0038748.