Background: Hallux valgus is a prevalent deformity of the forefoot, shown by deviation of the great toe (hallux) toward 2nd toe and prominence of metatarsal.The purpose of this retrospective study was to compare the efficacy, VAS pain scale, patient satisfaction of the cases of Chevron and Simple, Effective, Rapid, Inexpensive (SERI) surgical techniques in the correction and treatment of moderate hallux valgus.
Methods: This is a retrospective comparative cohort study of 70 patients undergone surgery for correction of hallux valgus using one of 2 techniques (Chevron technique n=35, SERI technique n=35) at Baqiyatallah Hospital in the second half of 2022. The hallux valgus angle (HVA) and intermetatarsal angle (IMA) were measured preoperatively and 1 year after the operation, using radiographic and medical records . The pain level of patients was evaluated using the Visual Analog Score (VAS) pain scale, as well as subjective satisfaction. Both were evaluated and documented in patients medical records.
Results: In preoperative evaluation, the mean preoperative intermetatarsal angle (IMA) was 12.97 ±1.70 (11.27-14.67) in the SERI group and 12.08±1.24 (10.84 -13.32) in the Chevron group. The mean preoperative hallux valgus angle (HVA) was 32.80 ±3.26 (29.54-36.06) in the SERI group and 32.17±1.94 (30.23-34.11) in the Chevron group. In postoperative 1-year follow-up the mean preoperative intermetatarsal angle (IMA) was 8.14±1.50 (7.64-10.64) in the SERI group and 9.37±1.03 (8.34-10.40) in the Chevron group. The mean preoperative hallux valgus angle (HVA) was 10.28 ±1.60 (8.68-11.88) in the SERI group and 14.4±1.41 (12.99-15.81) in the Chevron group. Postoperative HVA and IMA measurements showed a statistically meaningful difference between the two groups (P < 0.05).

Conclusion: SERI technique provides higher patient satisfaction and lower pain levels compared to the Chevron technique in 1-year follow-up. This study demonstrated better surgery outcome in the SERI technique for moderate hallux valgus.