@Article{, title={Mechanical evaluation of nano hydroxyapatite, chitosan and collagen composite coating compared with nano hydroxyapatite coating on commercially pure titanium dental implants}, author={Sabreen W. Ibrahim and Widad A. Al Nakkash}, journal={Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد}, volume={29}, number={2}, pages={42-48}, year={2017}, abstract={Background: Dental implants act as infrastructure for fixed restoration to look like as a natural tooth.Osseointegration is a biological events and considered as a base for success of dental implant. The aim of this studyis to evaluate the bond strength between bone and Ti implant coated with mixture of nano hydroxyapatite-chitosancollagencompared with Ti implants coated with nano hydroxyapatite implanted in rabbit tibia, after different periodof implantation time (two and six weeks) by torque removal test.Material and methods: 36 screws of commercially pure titanium; 8mm in length and 3mm diameter , 18 screwscoated with mixture of nano hydroxyapatite-chitosan-collagen and18 screws coated with nano hydroxyapatite bydip coating. Structural characteristics was assessed by scanning electron microscope, and FTIR analysis. The screwswere implanted in 18 healthy adult male New Zeeland rabbits each tibia received one screw, right tibia receivedscrew coated with nano hydroxyapatite while left tibia received screw coated nano hydroxyapatite-chitosancollagencomposite. Removal torque test was done by torque meter to determine the highest torque valuenecessary to remove the implants from tibia bone after different period of time of implantation(2 and 6 weeks).Result: Nano hydroxyapatite-chitosan-collagen composite coating was resulting in higher torque removal value thannano hydroxyapatite coating for two periods of time.Conclusion: Concluded that addition of collagen and chitosan to nano hydroxyapatite was more efficient in rapidbone formation than nano hydroxyapatite only

} }