The architect of arthroplasty: A commentary on the landmark contributions of Chitranjan S. Ranawat, MD

Chitranjan S. Ranawat has played a seminal role in shaping modern arthroplasty through his enduring contributions to surgical technique, implant design, education, and outcomes research. His work emphasized meticulous preoperative planning, precise soft-tissue balancing, restoration of alignment, and reproducible surgical principles, particularly in total knee arthroplasty. The development and widespread adoption of the Ranawat classification systems, alignment concepts, and outcome measures provided surgeons with practical tools that enhanced consistency and long-term success in joint replacement surgery. In hip arthroplasty, Prof. Ranawat contributed significantly to the understanding of femoral and acetabular biomechanics, implant fixation principles, and the management of complex primary and revision procedures. His emphasis on accurate component positioning, restoration of hip biomechanics, and long-term survivorship helped refine contemporary approaches to total hip arthroplasty. Beyond technical innovation, his commitment to teaching and mentorship influenced generations of arthroplasty surgeons worldwide, fostering a culture of excellence, standardization, and patient-centered care. This commentary highlights the key milestones of his career and examines how his philosophies continue to inform contemporary arthroplasty practice and education.