8. Conclusions and Future Scope

This chapter delves into the surface modification of cobalt-chromium (Co–Cr) alloys using Electrical Discharge Machining (EDM) to enhance orthopedic implant performance. The study systematically addresses the need for improved bioactivity, wear resistance, corrosion resistance, and biocompatibility of Co–Cr implants through innovative EDM techniques. Key findings include the optimization of EDM parameters to achieve desirable surface textures and deposition characteristics, validated through corrosion resistance testing, tribological analysis, and mechanical integrity evaluation. The biocompatibility of the coated surfaces was assessed through in-vitro cytotoxicity and hemolysis tests, indicating promising bioactivity and suitability for long-term orthopedic applications. The research also explores the use of different electrode materials, such as graphite, tungsten, and tungsten-copper (W–Cu), to determine their influence on machining outcomes. Optimal EDM processing conditions were identified, resulting in surfaces with superior biological compatibility and tribological characteristics. The study concludes that EDM-treated Co–Cr implants offer enhanced mechanical performance and improved biocompatibility, positioning them as highly promising candidates for orthopedic procedures. Future research directions include analyzing post-machining residual stress, implementing powder-mixed EDM, conducting in-vivo experiments, and exploring hybrid machining techniques to further optimize implant surface functionality.