Akins original description of his osteotomy did not describe the use of any metal work. Today the osteotomy is most commonly held and fixed with either a staple or screw. We describe the results obtained with a simple suture technique. Methods Data was collected prospectively on 125 patients undergoing an Akin osteotomy. Hallux valgus (HV) and intermetatarsal (IM) angles pre and postoperatively were recorded. Patients were reviewed at 6 week follow up. Cost analysis was also performed comparing different fixation types. 111 of the patients were female and 14 male. The average age at time of surgery was 49 years. 104 cases were in conjunction with hallux valgus correction while 21 cases were for hallux interphalangeus. The mean preoperative HV angle was 33.3 degrees (range 22 to 53), and the IM angle 13.3 degrees (range 9 to 25). At the 6 week follow up all patients had shown signs of radiological union. The postoperative HV angle was 12.4 degrees (range 7 to 17) and the IM angle 6.4 degrees (range 5 to 11). All patients maintained their correction. There were no complications, infections or fixation problems. All patients were satisfied with their surgery and would have it repeated again. The suture technique was the most cost effective method. We describe a quick, easy, implant free method of fixing the Akin osteotomy. There is no need for metalwork removal and in today's world of austerity and the current climate of widespread budget constraints we describe a cost effective method which is clinically just as effective as methods requiring a staple or screw

Minimally invasive chevron and akin osteotomy are being used in a few centres in the UK. The purpose of our study was to analyse our early results and present our early experience of minimally invasive chevron and akin osteotomy (MICA) for the correction of mild to moderate hallux valgus. This study assessed the radiological and clinical measurements, American Orthopaedic Foot and Ankle Society (AOFAS) scores, pain scores and patient satisfaction associated with performance of the MICA, for the treatment of hallux valgus. Between September 2010 and April 2012, 96 consecutive patients (122 feet) who underwent MICA were assessed. The overall satisfaction rate was over 90%. The mean total AOFAS score was 89.7 points. VAS for pain reduced from a mean of 7.4 to less than 1 point. On weight bearing anterior-posterior foot radiographs there was a significant improvement in the mean IMA and HVA. Complications included 2 episodes of superficial infection (1.6%), 1 fracture (0.8%), 4 incidence of nerve injury (3.3%) (Numbness) and 9 patients requiring removal of screw (7.4%). However, these screw removals occurred early on in the study and diminished after a slight modification in surgical technique. Based on our findings we concluded that MICA is an effective procedure with good patient satisfaction in the treatment of mild to moderate hallux valgus

Background. Patient reported outcome and experience measures have been a fundamental part of the NHS. We used PROMS2.0, a semi-automated web-based system, which allows collection and analysis of outcome data, to assess the patient reported outcome/experience measures for scarf+/− akin osteotomy for hallux valgus. Methods. Prospective PROMs/PREMs data was collected. Scores used to asses outcomes included EQ-5D VAS, EQ-5D Health Index, and MOxFQ, collected pre-operatively and post-operatively (Post-op follow-up 6–12months) Patient Personal Experience (PPE-15) was collected postoperatively. Results. 40 patients (35Female/5Male) (19Left +21Right). Average age- 60.7 years (Range 29–88). No bilateral procedures. Pre-op average MOXFQ scores for pain, walking and social interaction: 51.6 (range 5–100), 51.4 (range 0–96) and 48.8 (range 0–100) respectively. Post-operatively improved to 24.4 (range 0–100), 22.9 (range 0–86) and 23.1 (range 0–88). Corresponding P values for all < 0.00001 and statistically significant. 32/40 (80%) patients showed improvement in all three domains. Of 8 who worsened- 6 worse with pain, 4 with walking and 5 with social-interaction. EQ5D improved; pre-op index average- 0.70 and pre-op VAS score average- 79.3. Post-op index average- 0.80. VAS score average- 82.9. Index improvements were significant, P-value < 0.0023 (significant). EQ5D improvements in line with those found in hip/knee replacements. No differences between 6/12m follow-up. Patients stratified according to age-groups for analysis, 11 patients under 54 years old, 15 between 55–64, and 14 over 65. Greatest improvement in over 65s for MOxFQ and under 55s for EQ5D. 27/35 women improved in all MOxFQ domains, whilst 5/5 men did. P-value for age and sex both < 0.05 therefore significant. Age/sex EQ5D showed results of no statistical significance. 65 patients filled post-op PPE questionnaire. Average overall satisfaction of 72.9%. Conclusion. The procedure is very effective with high PROMs/PREMs. Older sub-group have best outcomes and highest satisfaction. Level of evidence. Prospective case series- Level 3

We reviewed 91 patients (103 feet) who underwent a Ludloff osteotomy combined with additional procedures. According to the combined procedures performed, patients were divided into Group I (31 feet; first web space release), Group II (35 feet; Akin osteotomy and trans-articular release), or Group III (37 feet; Akin osteotomy, supplementary axial Kirschner (K-) wire fixation, and trans-articular release). Each group was then further subdivided into severe and moderate deformities. The mean hallux valgus angle correction of Group II was significantly greater than that of Group I (p = 0.001). The mean intermetatarsal angle correction of Group III was significantly greater than that of Group II (p < 0.001). In severe deformities, post-operative incongruity of the first metatarsophalangeal joint was least common in Group I (p = 0.026). Akin osteotomy significantly increased correction of the hallux valgus angle, while a supplementary K-wire significantly reduced the later loss of intermetatarsal angle correction. First web space release can be recommended for severe deformity. Additionally, K-wire fixation (odds ratio (OR) 5.05 (95% confidence interval (CI) 1.21 to 24.39); p = 0.032) and the pre-operative hallux valgus angle (OR 2.20 (95% CI 1.11 to 4.73); p = 0.001) were shown to be factors affecting recurrence of hallux valgus after Ludloff osteotomy. Cite this article: Bone Joint J 2013;95-B:803–8

Background. There are many different procedures described for the correction of hallux valgus deformity. Minimally invasive surgery has become increasingly popular, with clinical and radiological outcomes comparable to traditional open osteotomy approaches. There is increasing interest in hallux valgus deformity correction using third-generation minimally invasive chevron akin osteotomy (MICA) technique. Objective. To assess the radiographic correction and 2 year clinical outcomes of third-generation MICA using validated outcome measures. Methods. This is a prospective single-surgeon case series of 420 consecutive feet undergoing MICA surgery between July 2014 and November 2018. Primary clinical outcome measures included the Manchester-Oxford Foot Questionnaire (MOXFQ), EQ-5D, and the Visual Analogue Pain Scale. Secondary outcome measures included radiographic parameters, and complication rates. Results. Pre-operative and 2 year post-operative patient reported outcomes were collected for 334 feet (79.5%). At minimum 2 year follow-up, the MOXFQ scores (mean ± standard deviation (SD)) had improved for each domain: pain; pre-operative 43.9±21.0 reduced to 9.1±15.6 post-operatively (p<0.001), walking and standing; pre-operative 38.2±23.6 reduced to 6.5±14.5 post-operatively (p<0.001) and social interaction; pre-operative 47.6±22.1, reduced to 6.5±13.5 post-operatively (p<0.001). At 2 year follow-up, the VAS Pain score (mean ± SD) improved from a pre-operative of 31.3±22.4 to 8.3±16.2 post-operatively (p<0.001). 1–2 intermetatarsal angle (mean ± SD) reduced from 15.4°±3.5° to 5.8°±3.1° (p<0.001) and hallux valgus angle reduced from 33.1°±10.2° to 9.0°±5.0° post-operatively (p<0.001). Conclusion. Third-generation MICA showed significant improvement in clinical outcomes at 2 year follow-up and can be successfully used for correction of a wide range of hallux valgus deformities

Background. Recent large studies of third-generation minimally invasive hallux valgus surgery (MIS) have demonstrated significant improvement in clinical and radiological outcomes. It remains unknown whether these clinical and radiological outcomes are maintained in the medium to long-term. The aim of this study was to investigate the five-year clinical and radiological outcomes following third-generation MIS hallux valgus surgery. Methods. A retrospective observational single surgeon case series of consecutive patients undergoing primary isolated third-generation percutaneous Chevron and Akin osteotomies (PECA) for hallux valgus with a minimum 60 month clinical and radiographic follow up. Primary outcome was radiographic assessment of the hallux valgus angle (HVA) and intermetatarsal angle (IMA) pre-operatively, 6 months and ≥60 months following PECA. Secondary outcomes included the Manchester-Oxford Foot Questionnaire, patient satisfaction, Euroqol-5D Visual Analogue Scale and Visual Analogue Scale for Pain. Results. Between 2012 and 2014, 126 consecutive feet underwent isolated third-generation PECA. The mean follow up was 68.8±7.3 (range 60–88) months. There was a significant improvement in radiographic deformity correction; IMA improved from 13.0±3.0 to 6.0±2.6, (p < 0.001) and HVA improved from 27.5±7.6 to 7.8±5.1. There was a statistically significant but not clinically relevant increase of 1.2±2.6° in the HVA between 6 month and ≥60 month radiographs. There was an increase in IMA of 0.1±1.6º between 6 month and ≥60 month radiographs which was not statistically or clinically significant. MOXFQ Index score at ≥follow up was 10.1±17.0. The radiographic recurrence rate was 2.6% at final follow up. The screw removal rate was 4.0%. Conclusion. Radiological deformity correction following third-generation PECA is maintained at a mean follow up of 68.8 months with a radiographic recurrence rate of 2.6%. Clinical PROMs and patient satisfaction levels are high and comparable to other third-generation studies with shorter duration of follow up

Aims. The aim of this study was to report a single surgeon series of consecutive patients with moderate hallux valgus managed with a percutaneous extra-articular reverse-L chevron (PERC) osteotomy. . Patients and Methods. A total of 38 patients underwent 45 procedures. There were 35 women and three men. The mean age of the patients was 48 years (17 to 69). An additional percutaneous Akin osteotomy was performed in 37 feet and percutaneous lateral capsular release was performed in 22 feet. Clinical and radiological assessments included the type of forefoot, range of movement, the American Orthopedic Foot and Ankle (AOFAS) score, a subjective rating and radiological parameters. . The mean follow-up was 59.1 months (45.9 to 75.2). No patients were lost to follow-up. Results. The mean AOFAS score increased from 62.5 (30 to 80) pre-operatively to 97.1 (75 to 100) post-operatively. A total of 37 patients (97%) were satisfied. At the last follow up there was a statistically significant decrease in the hallux valgus angle, the intermetatarsal angle and the proximal articular set angle. The range of movement of the first metatarsophalangeal joint improved significantly.. There was more improvement in the range of movement in patients who had fixation of the osteotomy of the proximal phalanx. Conclusion. Preliminary results of this percutaneous approach are promising. This technique is reliable and reproducible. Its main asset is that it maintains an excellent range of movement. Take home message: The PERC osteotomy procedure is an effective approach for surgical management of moderate hallux valgus which combines the benefits of percutaneous surgery with the versatility of the chevron osteotomy whilst maintaining excellent first MTPJ range of motion. Cite this article: Bone Joint J 2016;98-B:365–73

Introduction. Hallux valgus is a common orthopaedic complaint with multiple surgical options. There are many methods available for assessing whether sufficient translation of the first metatarsal can be achieved with a metatarsal translational osteotomy alone. None of the current methods take into account the breadth of the metatarsal. With current PACS technology a radiograph can be zoomed to any size and we postulate that by using the surgeon's thumb (or any suitable digit), as a sizing tool, a safe clinical decision can be made concerning whether a translational metatarsal osteotomy alone will provide sufficient correction. Method. We reviewed the preoperative radiographs (weightbearing AP) of twenty patients who had scarf and akin osteotomies and twenty patients with a deformity too great for scarf and akin osteotomies. The senior author (CC) taught the rule of thumb to one consultant and two registrars (total two registrars and two consultants). The radiographs were blindly randomised and the participants assessed each radiograph and decided whether sufficient translation could be achieved with a translational metatarsal osteotomy alone. The process was repeated three months later. Twenty patients were deemed sufficient for intra-user variability and significance based on a recent JBJS(A) article concerning radiographic measurements post proximal crescentic osteotomy (Shima et al. 2009). Results. Good inter- and intra- user variability was demonstrated and using the rule of thumb is a safe way of determining whether a distal osteotomy alone will provide sufficient correction

Introduction. Hallux valgus deformity is a common potentially painful condition. Over 150 orthopaedic procedures have been described to treat hallux valgus and the indication for surgery is pain intractable to nonoperative management. Methods. A retrospective analysis of the treatment of complex hallux valgus with bifocal metatarsal and Akin osteotomies of the first ray performed by the senior author (CC). 22 patients were treated over a three year period from 2008 to 2011, 24 trifocal osteotomies were undertaken. Hallux valgus angle (HVA), intermetatarsal angle (IMA) and distal metatarsal articular angle (DMAA) were all measured from pre- and postoperative radiographs. The patients were also clinically reviewed. Results. The study group consisted of 21 women and 1 man with a mean age of 53 years. The average time to follow up was 19 months. Four cases had undergone previous surgery. Average HVA correction was 26.9 degrees (p < 0.0001), average IMA correction was 12.65 degrees (p < 0.0001). No patients had postoperative infection and all osteotomies went on to union. All patients reported resolution of pain. Two patients required removal of metalwork and the distal osteotomy angulated slightly in one patient not requiring reoperation. Conclusion. We demonstrate that bifocal metatarsal and akin osteotomies of the first ray are a safe and effective method of correcting complex hallux valgus

Introduction. We describe our experience with a minimally invasive Chevron and Akin (MICA) technique for hallux valgus correction. This technique adheres to the same principles as open surgical correction but is performed using a specialized high-speed cutting burr under image intensifier guidance via tiny skin portals. Methods. All patients undergoing minimally invasive hallux valgus correction between November 2009 and April 2010 were included in this study and were subject to prospective clinical and radiological review. Patients were scored using the Kitaoka score as well as radiological review and patient satisfaction survey. Surgery was performed under general anaesthetic and included distal soft tissue release, Chevron and Akin osteotomies, with the same indications as for open surgery. All osteotomies were internally fixed with cannulated compression screws. Results. 83 operations were performed on 70 patients (2 male 65 female, mean age 54 years (27-78)). The pre-operative mean HVA was 34° and IMA 14°. Post-operative mean HVA was 9° and IMA 9.5°. Kitaoka score improved significantly at 3-12 months follow-up. There were no delayed or non- s and no osteonecrosis. Six M1 osteotomies moved during the postoperative period (3 feet (2 patients) required further surgery + 3 incomplete corrections without need for further surgery) and the fixation technique was successfully modified to avoid this problem. Mild transfer metatarsalgia was observed in 4 patients. There were 2 superficial wound infections. Cutaneous nerve injuries were noted in 3 feet but none painful. No recurrent deformities observed to date. Overall, 65% patients very satisfied, 29% satisfied, 6% unsatisfied. Discussion. This study suggests that good results can be obtained in forefoot surgery with the MICA technique. We believe this technique may offer advantages for some patients in terms of reduced morbidity and cosmesis. A randomized study is in progress to compare open and minimally invasive techniques

We reviewed the outcome of distal chevron metatarsal osteotomy without tendon transfer in 19 consecutive patients (19 feet) with a hallux varus deformity following surgery for hallux valgus. All patients underwent distal chevron metatarsal osteotomy with medial displacement and a medial closing wedge osteotomy along with a medial capsular release.

The mean hallux valgus angle improved from −11.6° pre-operatively to 4.7° postoperatively, the mean first-second intermetatarsal angle improved from −0.3° to 3.3° and the distal metatarsal articular angle from 9.5° to 2.3° and the first metatarsophalangeal joints became congruent post-operatively in all 19 feet. The mean relative length ratio of the metatarsus decreased from 1.01 to 0.99 and the mean American Orthopaedic Foot and Ankle Society score improved from 77 to 95 points.

In two patients the hallux varus recurred. One was symptom-free but the other remained symptomatic after a repeat distal chevron osteotomy. There were no other complications.

We consider that distal chevron metatarsal osteotomy with a medial wedge osteotomy and medial capsular release is a useful procedure for the correction of hallux varus after surgery for hallux valgus.