Two-corner fusion versus four-corner fusion for the treatment of wrist arthritis

Abstract

The wrist pain in SLAC/SNAC arthritis comes from wear and break down between specific bones in the wrist. By fusing the affected bones, surgeons can improve pain while maintaining some range of motion. To accomplish this, the ulnar-sided (the side of your little finger) bones can be fused (known as four-corner fusion). A second option exists where an extra bone is removed and the remaining bones are fused in the same way as for the four-corner fusion. (This is known as a 2-corner fusion).

Surgeons have more commonly performed four-corner fusion for this problem. Two corner fusions have gained popularity and the outcomes of surgery with these two methods are similar.

In addition to treating the pain from the arthritic joints, a two-corner fusion may offer improved range of motion compared to the four-corner fusion. This research will provide valuable information towards improving knowledge of SNAC/SLAC arthritis treatment.

Currently, it is unknown whether one method is superior to the other. This study will help answer this question and ensure that future patients get the operation that gives them the best function.