A midfoot fusion is performed to treat midfoot arthritis. The procedure involves fusion one of more of the first three tarsometatarsal (TMT) joints. Most commonly the second TMT joint is involved, but the first and third may also be affected by arthritis. Typically the 4th and 5th TMT joints are not fused as these joints have more motion that the 1st, 2nd, or 3rd TMT joints.
Fusion the joints involves removing any remaining cartilage; creating a bony surface that can heal; and then stabilizing the joints with screws or a plate. Any prominent midfoot bone spurs (Tarsal Boss) would be removed at the time of surgery. Patients are then keep non-weight-bearing or with limitations to their weight bearing for 6-8 weeks until the joints have fused. This procedure essentially turns a painful, stiff arthritis joint into a painless, fused joint.
Edited January 18th, 2013