PAULO GILBERTO CIMBALISTA DE ALENCAR, Born in São José dos Campos, state of São Paulo, Brazil, on the 4th of June, 1957. Graduated in the School of Medicine in the Federal University of Paraná in Curitiba, Brazil, in 1980. Medical Resident in Orthopaedics and Traumatology in the Hospital de Clínicas in the same University in 1981/82. Fellow in Bone Tumor Surgery and Hip Surgery at Pavilhão Fernandinho Simonsen in Santa Casa de São Paulo, in 1983. Fellow in the London Hospital, U.K., under supervision of Mr. Michael Freeman, in 1984. Visiting surgeon of the Hip Centre in the Wrightington Hospital in Wigan, U.K. AO-ASIF fellowship in Ulm, Germany. Visiting surgeon of the Hospital for Special Surgery, New York, NY. Frequent updating in Hip and Knee Surgery by visiting specialized hospitals in the USA, Canada and Europe. Active lecturer in meetings and author of scientific papers and chapters about hip and knee reconstructive surgery in specialized books. Member of the following scientific societies: Sociedade Brasileira de Ortopedia e Traumatologia Brazilian Hip Society Brazilian Knee Society Sociedad Latinoamericana de Ortopedia y Traumatologia Sociedad Latinoamericana de Tumores Ósseos Society for Adult Reconstructive Arthritis Surgery, U.K American Academy of Orthopedic Surgeons AO International American Associantion of Hip and Knee Surgeons Honorary member of the Asociación Argentina para el Estudio de la Cadera y la Rodilla (ACARO) and Sociedad Ortopédica de Rosário y del Litoral, Argentina Honorary member of the Sociedad Chilena de Ortopedia y Traumatología Honorary member of the Sociedad Colombiana de Cirugia Ortopédica y Traumatologia. President of the VII Brazilian Congress of Hip Surgery, October 1997 President of the Brazilian Hip Society 2000-2002. Master of Sciences (M.Sc.) and Philosophy Doctor (Ph.D.) in Surgery Chief of the Hip and Knee Surgery Clinic Medical Director of the Musculoeskeletal Tissue Bank Hospital de Clínicas of the Federal University of Paraná, in Curitiba, Brazil Practice limited to Hip and Knee Reconstructive Surgery Guest speaker of Hip and Knee Surgery in many institutions, including Harvard University (Harris Arthroplasty Course), Asia, Europe and Latin America.