Refaat M, Hamad T. Evaluation of Mechanical and Histological Significance of Nano Hydroxyapatite and Nano Zirconium Oxide Coating On the Osseointegration of CP Ti Implants. J Bagh Coll Dent [Internet]. 14Sep.2016 [cited 20Nov.2019];28(3):30-7. Available from: http://jbcd.uobaghdad.edu.iq/index.php/jbcd/article/view/1422