Campbell's Orthopaedic Surgery has been dramatically revamped in content and format over the past four years. As an internationally recognized orthopaedic classic, the 12th edition is a perfect combination of positive innovation and classicism, providing orthopaedic surgeons with an exciting and surprising array of new theories, techniques, and equipment, while continuing to maintain a rigorous, factual style that preserves and shapes many of the classic surgical techniques that have been described as the "gold standard. 123456789 Compared with the last 11 editions, the new edition has 11 new active international experts among the contributors, and adjusted the structure of the book according to the development of orthopaedics, added, subtracted and adjusted more than 10 chapters, and substantially updated the content of the book, with a focus on minimally invasive, arthroscopy and endoscopy, and included the latest evidence of the diagnosis and treatment specifications and potential new technologies, which fully reflects In the past 5 years, orthopaedics has been updated with new concepts, materials and instruments, and surgical techniques, with a revision rate of more than 30%. In the form of publication also added new features, the use of computer technology to draw thousands of illustrations.123456789 As an orthopedic surgeon must-read classic reference book, the 12th edition of Campbell Orthopaedic Surgery in the systematic, advanced, instructive and other aspects of the world-renowned orthopaedic classics have achieved a new leap forward to a new height.