Abstract
The proximal interphalangeal (PIP) joint, a tightly constructed hinge joint, frequently develops limited motion following injury. Mobilisation splints are the most frequently used method of regaining PIP joint motion following isolated PIP injury.
This article reviews a variety of PIP mobilisation splints, which the author has found effective. In addition to discussing the biomechanics of PIP extension and flexion mobilisation splinting, a variety of designs are offered for PIP extension mobilisation and one design for PIP flexion mobilisation. Clinical problems discussed include: PIP extension lag, PIP flexion contracture responsive to stretch (including acute boutonniere), PIP joint contracture unresponsive to stretch, and gaining/maintaining the last few degrees of PIP extension in a resistive contracture as well as isolated PIP flexion mobilisation. For all splints, construction advice and other tips are given for successful use of these designs.