In light of more clinical experience, this book reviews the principles and concepts underlying Professor Sir John Charnley's original work Low Friction Arthroplasty of the Hip: Theory and Practice. Consistency of design, materials, principles of surgical techniques and regular follow-up of a large number of patients has offered truly long-term results to be presented in this book. Charnley Low-Frictional Torque Arthroplasty of the Hip: Practice and Results involves studies spanning from 1962 - 2015 to successfully indicate the avenues for further development and new ideas in clinical practice. With over 40 years of research included, this book is not a sudden diversion into a speculative area of hip replacement surgery. It is a carefully documented work of the evolution of the Charnley low-frictional torque arthroplasty to assist surgeons who practice this technique in their daily clinical work. .