Dina G. El Nady, Azza M. Hashem, Madiha A. Shoeib, Heba A. Shalaby And Rasha M. Abdelraouf,

ABSTRACT
Objective: This Study Aimed To Coat Titanium Alloy Dental Implant With Biological Active Chitosan/calcium Phosphate Composite Coating By Electrophoresis Technique.

Materials and Methods: 50 Ti-6Al-4V Discs Were Prepared And Divided Into Five Groups (n=10). Group 1 Was Used As Control Group. Electrophoretic Technique Was Used To Deposit Pure Chitosan On Dental Implant Disc (Group 2). Group 3 Was Calcium Phosphate Coated. Group 4 Was Chitosan/calcium Phosphate Composite Coated With Lower Current Density And Group 5 With Higher Current Density. The Different Coated Dental Implant Surfaces Were Chemically Characterized By (XRD) And (FTIR). Surface Topography Was Surveyed By Using (ESEM) Whereas Morphologically By (SEM). Coating Thickness Was Calculated. Result: XRD- Analysis Of The Different Coated Dental Implants Revealed That; Group 2 Represented Amorphous Pattern Chitosan Coated Layer. Highly Crystalline Hydroxyapatite/ Chitosan Composite Coating Was Formed Mainly With Lower Current Density (Group 4). Whereas Increased Current Density Group 5 Formed From Less Amount Of Crystalline HA/ Chitosan Composite Coating. FTIR Analysis Confirmed The XRD Results. Group 5; Recorded The Highest Significant Mean Average Surface Roughness Was (Ra) = 189.26�1.01�m With Highest Coating Thickness. SE Micrograph Revealed Deposition Of Typical Morphology Of HA/chitosan Composite Structure In Group 4 And Group5 All Over The Surface. Conclusion: Lower Current Density Enhances Deposition Of Less Defective HA Crystal Interlaced Chitosan Hybrid Composite Structure By Using Electrophoretic Deposition Technique.