A tendon is a strong fibrous tissue that attaches muscles to bones, generating force, allowing us to move our bones and joints. There are two types of tendons in the hand, flexor (bending fingers) and extensor (straightening fingers) tendons. Flexor tendons are more commonly lacerated, or cut, than extensor tendons. These can occur due to cuts to the hand or other injuries such as a direct blow. Typically, when these lacerations of tendons occur, other structures are injured such as nerves and bones. These structures typically require repair for the hand to function correctly.