High Quality Content by WIKIPEDIA articles! Kevin Robert Stone, M.D. (born June 4, 1955), is an American orthopedic surgeon, who specializes in sports medicine and injuries of the knee, shoulder, and ankle joints. He has lectured and is recognized internationally as an authority on cartilage and meniscal growth, replacement, and repair. Stone is known for his development of the paste grafting surgical technique in 1991, combined with meniscus replacement, which are biologic joint replacement procedures for the regeneration of the knee joint. He has, since, taught these techniques to surgeons in the US and worldwide. He is the founder and chairman of the Stone Research Foundation for Sports Medicine and Arthritis, a center that conducts research in advanced surgical techniques and tissue regeneration in San Francisco, California. This research has led to advancements in cartilage replacement and regeneration, cruciate ligament repair and reconstruction, and techniques to prevent osteoarthritic degeneration. He holds more than 50 U.S. patents on healthcare inventions.