Abstract
Introduction
Trends in hallux valgus surgery continue to evolve. Basal metatarsal osteotomy theoretically provides the greatest correction, but is under-represented in the literature. This paper reports our early experience with a plate-fixed, opening- wedge basal osteotomy, combined with a new form of distal soft tissue correction (in preference to Akin phalangeal osteotomy).
Materials and Methods
Thirty-three patients are reported here. The basal metatarsal osteotomy is fixed with the ‘Low Profile’ Arthrex titanium plate. No bone graft or filler is required, providing the osteotomy is within about 12mm of the base.
Distal soft tissue correction comprised a full lateral release, and then proximal advancement of a complete capsular ‘sleeve’ on the medial side. The plate serves as a rigid anchoring point for the tensioning stitches. Using this technique, almost any degree of hallux valgus can be corrected, and there is even potential for over-correction.
Functional outcome was assessed using the Manchester-Oxford foot and ankle score (MOXF). Radiographically the intermetatarsal angle was evaluated pre-operatively and at least 6 months postoperatively. Patients’ satisfaction and complication rates were recorded.
Results
Clinical 87% (29 of 33) reported high satisfaction with the functional and cosmetic outcome. The opening basal wedge osteotomy slightly lengthens the first ray and as result none of our patients developed transfer metatarsalgia.
Results
Radiology Hallux valgus angle (HVA) and inter-metatarsal angle (IMA) were measured on pre- and post-operative weight bearing radiographs. The radiological correction seen was very striking The mean correction of the IMA was 14 degrees; mean HVA correction was … degrees.
Complications
One osteotomy was too distal, leading to a non-union, which required revision and bone grafting. Swelling and stiffness were seen in some patients, but these problems resolved steadily, with physiotherapy if needed.
Discussion
This operation is a combined proximal/distal, bone/soft tissue procedure. It can obtain correction of almost any degree of hallux valgus. The slight first- ray lengthening is an advantage, as it neutralizes potential second ray problems. However, this is a very early result and long-term outcomes are as yet unknown.
