This before after needle release of Dupuytrens shows the problem of weak and contracted intrinsic muscles that limit post-operative ability to regain extension.  Notice on the preoperative photo upper Dupuytrens contracture the little finger.  There is MCP and PIP joint disease that limits extension of the little finger.  Plus MCP joint disease of the ring and middle fingers that prevent full extension.  After NA, the MCP joint disease is corrected on all three fingers in the bottom left picture.  In the upper right picture the intrinsic muscles are relaxed via MCP joint forced flexion and there is improvement in PIP extension over the bottom left view.  In the final bottom right photo one can see that the dupuytrens contracture is all released and there is full PIP extension with passive extension by the physician.

These photos demonstrate the need for postoperative exercises to improve intrinsic muscle strength as these muscles have atrophied due to non-use.

On a positive note, it notice the immediate, excellent improvement of MCP extension of the little, ring, and middle fingers