Back in September of 1974, I acquired much valuable information while attending the International Conference on Total Knee Replacement in London, which was organized by The Medical Engineering Working Party and the Tribology Group of the Institution of Mechanical Engineers, and the British Orthopaedic Association. I was greatly inspired by the conference, and it formed the beginning of my studies on total knee replacement. The co-editors of this proceedings, Prof. J. Paul and Dr. S. Yamamoto, are both acquaintances made originally at that conference. The International Symposium on Total Knee Replacement held in Nagoya, Japan, on 18-19 May 1987 was attended by many participants, including Prof. Walker, who had presented his studies earlier in London. During the past decade and a half, remarkable technical progress has been made in total knee prostheses. In this symposium, cemented total knee replacement (TKR), noncemented TKR, design considerations of total knee prostheses, problems concerning the patello­ femoral joint, and the newly developed total knee prosthesis were the main topics discussed. I believe that much new information, including that about the challenges which still remain, along with a fresh view towards continuing studies, are presented here for the reader. I would like to express my sincere gratitude to the support of the Knee Joint Research Society in Japan and to the participants in the symposium for their great help in publishing this book.

Back in September of 1974, I acquired much valuable information while attending the International Conference on Total Knee Replacement in London, which was organized by The Medical Engineering Working Party and the Tribology Group of the Institution of Mechanical Engineers, and the British Orthopaedic Association. I was greatly inspired by the conference, and it formed the beginning of my studies on total knee replacement. The co-editors of this proceedings, Prof. J. Paul and Dr. S. Yamamoto, are both acquaintances made originally at that conference. The International Symposium on Total Knee Replacement held in Nagoya, Japan, on 18-19 May 1987 was attended by many participants, including Prof. Walker, who had presented his studies earlier in London. During the past decade and a half, remarkable technical progress has been made in total knee prostheses. In this symposium, cemented total knee replacement (TKR), noncemented TKR, design considerations of total knee prostheses, problems concerning the patello­ femoral joint, and the newly developed total knee prosthesis were the main topics discussed. I believe that much new information, including that about the challenges which still remain, along with a fresh view towards continuing studies, are presented here for the reader. I would like to express my sincere gratitude to the support of the Knee Joint Research Society in Japan and to the participants in the symposium for their great help in publishing this book.

A major part of orthopedics is the treatment of musculoskeletal diseases caused by structural disorders and mechanical breakdown of living tissue. Therefore, biomechanical consideration of static structures and dynamic mechanisms is compulsory for both diagnosis and treatment of orthopedic diseases. Previous biomechanical studies have enabled great advances in orthopedic implant technology, such as artificial joint replacement and instrumentation for spinal fusion. Consequently the importance of biomechanics is increasing more and more in daily clinical practice and development. In addition, biomaterial research into mechanical properties and tissue reactions of implant materials is certainly an important area of related study. This book is comprised of 22 papers presented at the International Seminar on Biomechanics in Orthopedics and the 17th Annual Meeting of the Japanese Society for Orthopedic Biomechanics, held in Nagoya in 1990. The volume contains full descriptions of both conventional and updated knowledge of the spine, ligaments, artificial joint replacement in the hip and knee, fracture treatment, and gait analysis, as well as biomaterials. I earnestly hope that this book will be of benefit to readers in daily clinical work and research. To close, I would like to thank profoundly the two coeditors, Prof. S.M. Perren and Mr. T. Hattori, and also a quiet supporter Mrs. J. Buchanan in Davos, for their cooperation in producing this book.

Back in September of 1974, I acquired much valuable information while attending the International Conference on Total Knee Replacement in London, which was organized by The Medical Engineering Working Party and the Tribology Group of the Institution of Mechanical Engineers, and the British Orthopaedic Association. I was greatly inspired by the conference, and it formed the beginning of my studies on total knee replacement. The co-editors of this proceedings, Prof. J. Paul and Dr. S. Yamamoto, are both acquaintances made originally at that conference. The International Symposium on Total Knee Replacement held in Nagoya, Japan, on 18-19 May 1987 was attended by many participants, including Prof. Walker, who had presented his studies earlier in London. During the past decade and a half, remarkable technical progress has been made in total knee prostheses. In this symposium, cemented total knee replacement (TKR), noncemented TKR, design considerations of total knee prostheses, problems concerning the patello­ femoral joint, and the newly developed total knee prosthesis were the main topics discussed. I believe that much new information, including that about the challenges which still remain, along with a fresh view towards continuing studies, are presented here for the reader. I would like to express my sincere gratitude to the support of the Knee Joint Research Society in Japan and to the participants in the symposium for their great help in publishing this book.

Back in September of 1974, I acquired much valuable information while attending the International Conference on Total Knee Replacement in London, which was organized by The Medical Engineering Working Party and the Tribology Group of the Institution of Mechanical Engineers, and the British Orthopaedic Association. I was greatly inspired by the conference, and it formed the beginning of my studies on total knee replacement. The co-editors of this proceedings, Prof. J. Paul and Dr. S. Yamamoto, are both acquaintances made originally at that conference. The International Symposium on Total Knee Replacement held in Nagoya, Japan, on 18-19 May 1987 was attended by many participants, including Prof. Walker, who had presented his studies earlier in London. During the past decade and a half, remarkable technical progress has been made in total knee prostheses. In this symposium, cemented total knee replacement (TKR), noncemented TKR, design considerations of total knee prostheses, problems concerning the patello­ femoral joint, and the newly developed total knee prosthesis were the main topics discussed. I believe that much new information, including that about the challenges which still remain, along with a fresh view towards continuing studies, are presented here for the reader. I would like to express my sincere gratitude to the support of the Knee Joint Research Society in Japan and to the participants in the symposium for their great help in publishing this book.

A major part of orthopedics is the treatment of musculoskeletal diseases caused by structural disorders and mechanical breakdown of living tissue. Therefore, biomechanical consideration of static structures and dynamic mechanisms is compulsory for both diagnosis and treatment of orthopedic diseases. Previous biomechanical studies have enabled great advances in orthopedic implant technology, such as artificial joint replacement and instrumentation for spinal fusion. Consequently the importance of biomechanics is increasing more and more in daily clinical practice and development. In addition, biomaterial research into mechanical properties and tissue reactions of implant materials is certainly an important area of related study. This book is comprised of 22 papers presented at the International Seminar on Biomechanics in Orthopedics and the 17th Annual Meeting of the Japanese Society for Orthopedic Biomechanics, held in Nagoya in 1990. The volume contains full descriptions of both conventional and updated knowledge of the spine, ligaments, artificial joint replacement in the hip and knee, fracture treatment, and gait analysis, as well as biomaterials. I earnestly hope that this book will be of benefit to readers in daily clinical work and research. To close, I would like to thank profoundly the two coeditors, Prof. S.M. Perren and Mr. T. Hattori, and also a quiet supporter Mrs. J. Buchanan in Davos, for their cooperation in producing this book.