Dislocation of bones occurs when the joints that are held by ligaments get separated abnormally. So ligament break caused the dislocation of the bones of the hand.

In case of a tendon, tendons join skeletal muscles to bone and tendon break causes inflammation. Break of skeletal muscles cannot be responsible for dislocation of bones as bones are joined by ligaments. Areolar tissues are found around muscles, nerves and blood vessels so they are not concerned with bones anyhow.