Electrochemical, mechanical and osseointegration evaluation of NBPC-coated 316L SS by EPD

Abstract

The effect of nano biphasic bioceramic (NBPC) coating on 316L stainless steel (316L SS) was investigated. NBPC coatings were developed on 316L SS by electrophoretic deposition process followed by vacuum sintering. The NBPC coatings were characterised by XRD, FTIR, FESEM with EDAX and AFM studies. The electrochemical performances of the coated samples were carried out by open circuit potential-time measurements, potentiodynamic polarisation and electrochemical impedance studies in Hank's solution. The electrochemical studies indicate that NBPC-coated samples have improved corrosion resistance and Vickers microhardness test showed enhancement in mechanical strength. Invitro studies with MC3T3-E1 osteoblast cell shows non-toxicity and high proliferation of NBPC-coated samples. These studies confirm the enhanced corrosion resistance, good mechanical strength with enhanced cell attachment and proliferation on the coated samples thus making it an ideal candidate for orthopaedic implants.

Investigation of Coatings, Corrosion and Wear Characteristics of Machined Biomaterials through Hydroxyapatite Mixed-EDM Process: A Review

“…As a consequence, coating the surface with bioceramic elements is proposed as an effective method to ensure low degradation of the metallic biomaterials by protecting them from wear and corrosion propagation [77]. An effective hydroxyapatite-based coating can improve bone formability, host responses, microhardness, and resistance to wear and corrosion [78][79][80][81][82][83][84][85][86]. Both the crystalline and the amorphous phase-based coatings of biomaterials influence the biocompatibility, mechanical properties, and corrosion behavior, which were discussed thoroughly in the previous literature reports.…”

Current Challenges and Innovative Developments in Hydroxyapatite-Based Coatings on Metallic Materials for Bone Implantation: A Review

“…Furthermore, the bond strength between HAp coating and metallic implant increases from 15.3 to 25.7 MPa after blending of SWNTs [155].HAp coatings formed using electro-chemical methods were more compact and uniform due to phenomena of nucleation and growth behind the deposition. Also the coating enhanced cell attachment and proliferation on the samples thus making it an ideal candidate for orthopedic implants [156]. Process and annealing temperatures were the critical factors deciding the nature of the coating.…”

“…Coatings 2020, 10, x FOR PEER REVIEW 15 of 32 phenomena of nucleation and growth behind the deposition. Also the coating enhanced cell attachment and proliferation on the samples thus making it an ideal candidate for orthopedic implants [156]. Process and annealing temperatures were the critical factors deciding the nature of the coating.…”

Osteoconductive Metallic Implants Using Hydroxyapatite Nanoparticles

“…It has been recognized that matching the stiffness of the implant with that of host tissue limits the stress-shielding effect. Owing to insufficient interfacial bonding between metal implant and host tissue, there is limited osteointegration [44].…”

“…HA coatings deposited on stainless steels improve osseointegration, due to their capacity to form chemical bonds (bioactive fixation) with the bone tissue and due to the osteoconductive and Osseo integrative nature of HA, it has become a popular coating material for orthopedic implants for over two decades. HA coated metallic prostheses that combine the osteoconductivity of HA and the high strength of metallic alloys have been increasingly favored by surgeons for younger patients seeking joint replacement [3,13,[42][43][44][45][46].…”