This user-friendly, pragmatic book discusses the normal and pathological conditions of the appendicular skeleton, with a focus on the preservation of joint function, providing a detailed overview of strategies for both common and complex joint preservation. The first section covers basic topics, ranging from joints homeostasis and biomechanics, to genetics, bio-orthopedics, tissue engineering and 3D bioprinting. The following sections are each dedicated to a specific joint – its functional anatomy, pathologic conditions, diagnostics and treatment. This book is of interest to orthopedists and sports medicine specialists treating common and complex injuries of the joints.