New Modified Chevron Osteotomy for Hallux Valgus / 대한족부족관절학회지

ABSTRACT

PURPOSE: In this study, we tried to develop the technique of osteotomy for hallux valgus. The new modified technique of osteotomy was accomplished with even more greater stability, accurate correction of the deformity and more effective than 'chevron' osteotomy in terms of correction of the deformity. MATERIALS AND METHODS: Between March 1998 and December 2001, 55 cases of new modified osteotomy for hallux valgus were performed for 39 patients, 16 of whom underwent operation of both feet. Operations were made for 34 women and 5 men whose average age was 46 years old (range, 20~71 years). Average follow up period was three years (range, 2~5 years), and during the follow up, the patients underwent physical examination and assessment with use of the American Orthpaedic Foot and Ankle Society's hallux-metatarso-phalangealinterphalangeal scale8) and standard foot radiographic measurements16). RESULTS: 37 patients (53 cases) out of 39 patients (55 cases) had no pain, good cosmesis, and all of the patients were satisfied with the results of the operation. Two had occasional mild discomfort. The average score according to the hallux-metatarso-phallangeal-interphalangeal scale8) was 93.2 points (range, 78~100 points). The average preoperative intermetatarsal angle was 14.4 degrees, which was decreased to 7.9 degrees after the osteotomy with an average correction of 6.5 degrees and The average preoperative hallux valgus angle was 34.1 degrees, which was decreased to 11.1 degrees after the osteotomy with an average correction of 23 degrees. This new modified technique would prevent the angulation or shortening at the osteotomy site and it was also even more stable at osteotomy site, and could do even more effective and accurate correction of the deformity than conventional Chevron osteotomy. CONCLUSION: New modified chevron osteotomy for the treatment of symptomatic hallux valgus was done in 55 cases, and the results were satisfactory in all cases. This method was more stable at the osteotomy site than conventional Chevron osteotomy and was also possible to do more accurate and more effective correction of the deformity. It was also easy to control the distal fragment of first metatarsal bone.