The Austin osteotomy, also known as a Chevron osteotomy, is a well-established operation used to correct selected bunions. It is most commonly considered for mild-to-moderate hallux valgus when the first metatarsophalangeal joint is suitable for preservation.
During the procedure, an incision is made near the big-toe joint and the prominent medial bone is carefully addressed. A V-shaped bone cut is then created near the head of the first metatarsal. The metatarsal head is shifted laterally to improve alignment and is usually secured with internal fixation such as a screw.
The key part of the operation is the realignment of the metatarsal. Simply shaving the bump without correcting the underlying position of the bone has limited ability to address the deformity and may increase the chance of recurrence or joint problems.
Soft-tissue balancing may be performed as required, and an Akin osteotomy of the proximal phalanx may occasionally be added when residual big-toe angulation remains. The exact steps depend on the individual anatomy and should not be assumed to be identical for every patient.
The Austin/Chevron procedure has the advantage of correcting the deformity close to the joint while preserving the joint itself. It can provide meaningful improvement in pain and alignment in appropriately selected patients. However, it is not the correct choice for every bunion. Severe deformity, significant first-ray instability, advanced arthritis, unusual joint orientation or revision surgery may require a different approach.
The operation may be performed as day surgery, with anaesthesia selected according to the clinical setting and patient requirements. Postoperative protection is necessary while the bone heals. Although many patients can bear weight in a specialised postoperative shoe, the exact instructions depend on fixation, bone quality and the procedure performed.
Good outcomes depend not only on the surgical technique but also on appropriate selection, accurate correction, wound care, swelling management and adherence to postoperative instructions.