Dr. Nor Hamdan Bin Mohamad Yahaya is a distinguished Senior Consultant Orthopaedic Surgeon and Associate Professor, leading the Arthroplasty Unit at UKM Medical Centre. He is a leading expert in primary, complex, and revision hip and knee replacements, performing approximately 200 joint replacements annually. His unit is a national referral center for revision arthroplasty. Dr. Nor Hamdan is also a Research Fellow focused on cartilage regeneration for osteoarthritis, with over 45 publications and numerous speaking engagements. He has received multiple accolades, including a Gold Medal at the UKM Research and Innovation Expo.