Extensor Tendon: Anatomy, Injury, and Reconstruction

Learning Objectives: After studying this article, the participant should be able to: 1. Describe the anatomy of the extensor tendons at the wrist, hand, and fingers. 2. Describe acute and chronic pathologic conditions affecting the extensor mechanism. 3. Understand physiology and techniques for repair of traumatic injuries. 4. Understand reconstructive options for chronic disorders. Although seemingly simple in its anatomy and function, the extensor mechanism of the hand is actually a complex set of interlinked muscles, tendons, and ligaments. A thorough understanding of the extensor anatomy is required to understand the consequences of injury at various levels. Reconstructive options must restore normal function. Whereas primary repair of anatomic structures is frequently possible in acute injury, it is rarely possible in chronic situations. Technically exacting procedures may be necessary to restore function. (Plast. Reconstr. Surg. 106: 1592, 2000.)