I am a professor of orthopedic surgery at Hanyang University with extensive surgical experience in shoulder arthroplasty for rheumatoid arthritis. In Korea, I have performed the highest number of surgeries for rheumatoid arthritis of the shoulder. In particular, in cases of advanced arthritis with severe bone defects, reconstructive surgery accompanied by bone grafting is required, and I can provide my experience and clinical outcomes in this field. I served as the Secretary General of the Korean Orthopaedic Association in 2020 and currently work as the Director of Insurance at the Korean Medical Association.