Usually, a fusion of the big to is performed due to arthritis of the joint. This may be isolated arthritis of the big toe (“hallux rigidus”) or part of generalised arthritis of the foot such as rheumatoid arthritis
The toe may also be fused to correct a severe deformity of the toe, such as a bunion (“hallux valgus”).
A fusion may also be used as a salvage option after failure of another operation on the big toe, especially if there is weakness, pain or deformity.