Splinting flexor tendon injuries.

Frequently used zone 2 flexor tendon repair splints are reviewed and classified according to the American Society of Hand Therapists' Splint Classification System. These splints both restrict and mobilise digital motion and fall into two main groups: (1) splints that incorporate the wrist and digital joints as primary joints to allow predetermined increments of early passive or active motion at both the wrist and digital joints; and (2) splints that include the wrist as a secondary joint and the digital joints as primary joints, allowing early passive or active motion at digital joints but not at the wrist.