Bunion Correction Using Proximal Chevron Osteotomy: A Single-Incision Technique

1998 ◽  
Vol 19 (7) ◽  
pp. 430-437 ◽  
Author(s):  
G. James Sammarco ◽  
Frank G. Russo-Alesi
Keyword(s):  
Hallux Valgus ◽  
Long Term Results ◽  
Metatarsal Osteotomy ◽  
First Metatarsal ◽  
Chevron Osteotomy ◽  
Metatarsal Angle ◽  
Valgus Angle ◽  
Adductor Tenotomy ◽  
Bunion Correction ◽  
Incision Technique

Proximal chevron first metatarsal osteotomy with lateral capsulotomy, adductor tenotomy, and binding of the first and second metatarsals was reviewed in 88 consecutive cases. Seventy-two cases in 55 patients are reported, with an average clinical follow-up of 41 months. The hallux valgus angle improved an average of 15°, from 32.0° preoperative to an average of 17.0° postoperatively. The intermetatarsal I-II angle improved an average of 5.5°, from 15.3° preoperatively to 9.0° postoperatively. The lateral plantar first metatarsal angle did not change. First metatarsal length was decreased by 2.0 mm. Union occurred at an average of 2 months. Sesamoid position improved 49%, from a preoperative average subluxation of 80% to a postoperative average subluxation of 29%. Subjective foot score profiles improved from a preoperative average of 70.1/100 to a postoperative average of 94.4/100 with respect to pain, deformity, motion, disability, and cosmesis. There were 10 patients with complications, including three patients with delayed unions, two with second metatarsal stress fractures, one with hallux varus, two with hallux limitus, one with progressive arthritis, one with cellulitis, and one with hallux elevatus. Eighty-four percent of the patients stated that they would undergo the procedure again without reservation, 9% would proceed with reservation, and 7% would not proceed with surgery again if offered. This technique provides reliable successful long-term results for the treatment of moderate and severe symptomatic bunion, hallux valgus, and metatarsus primus varus.

Bunion Correction Using Proximal Chevron Osteotomy

Foot & Ankle ◽  
1993 ◽  
Vol 14 (1) ◽  
pp. 8-14 ◽  
Author(s):  
G. James Sammarco ◽  
Bradley J. Brainard ◽  
Vincent James Sammarco
Keyword(s):  
Hallux Valgus ◽  
Subjective Evaluation ◽  
Excellent Result ◽  
Metatarsal Head ◽  
Metatarsal Osteotomy ◽  
First Metatarsal ◽  
Chevron Osteotomy ◽  
Valgus Angle ◽  
Adductor Tenotomy ◽  
Bunion Correction

Fifty-one cases of moderate to severe bunion deformity with hallux valgus and metatarsus primus varus in 43 patients were treated by bunionectomy, proximal Chevron metatarsal osteotomy, lateral capsulotomy, adductor tenotomy, and lashing of first and second metatarsals together. The hallux valgus angle improved an average of 19° from 33° (mean) preoperatively to 14° (mean) postoperatively. The intermetatarsal angle improved an average of 7.3° from an average of 14° preoperatively to an average of 6° postoperatively. The position of the sesamoids was realigned to beneath the first metatarsal head and the metatarsal length remained essentially unchanged. Union occurred in 9 weeks (mean). No malunions occurred. Foot score profiles revealed a significant improvement in subjective evaluation from 69/100 preoperatively to 83/100 postoperatively with respect to pain, deformity, motion, disability, and cosmesis. Seventy-eight percent of patients had a good to excellent result. Improved subjective evaluations indicated that proximal Chevron osteotomy combined with bunionectomy, capsulotomy, tenotomy, and metatarsal lashing provides a reliable method with respect to stability, technical ease, low complication, and satisfactory surgical outcome for correction of moderate and severe bunion deformity, both as a primary and revision procedure.

Juvenile Hallux Valgus: Etiology and Treatment

1995 ◽  
Vol 16 (11) ◽  
pp. 682-697 ◽  
Author(s):  
Michael J. Coughlin
Keyword(s):  
Hallux Valgus ◽  
Normal Population ◽  
Surgical Correction ◽  
Metatarsal Osteotomy ◽  
Hallux Valgus Angle ◽  
Pes Planus ◽  
First Metatarsal ◽  
Chevron Osteotomy ◽  
Valgus Angle ◽  
Metatarsus Adductus

In an 11-year retrospective study of 45 patients (60 feet) with juvenile hallux valgus, a multiprocedural approach was used to surgically correct the deformity. A Chevron osteotomy or McBride procedure was used for mild deformities, a distal soft tissue procedure with proximal first metatarsal osteotomy was used for moderate and severe deformities with MTP subluxation, and a double osteotomy (extra-articular correction) was used for moderate and severe deformities with an increased distal metatarsal articular angle (DMAA). The average hallux valgus correction was 17.2° and the average correction of the 1–2 intermetatarsal angle was 5.3°. Good and excellent results were obtained in 92% of cases using a multiprocedural approach. Eighty-eight percent of patients were female and 40% of deformities occurred at age 10 or younger. Early onset was characterized by increased deformity and an increased DMAA. Maternal transmission was noted in 72% of patients. An increased distal metatarsal articular angle was noted in 48% of cases. With subluxation of the first MTP joint, the average DMAA was 7.9°. With a congruent joint, the average DMAA was 15.3°. In patients where hallux valgus occurred at age 10 or younger, the DMAA was increased. First metatarsal length was compared with second metatarsal length. While the incidence of a long first metatarsal was similar to that in the normal population (30%), the DMAA was 15.8° for a long first metatarsal and 6.0° for a short first metatarsal. An increased DMAA may be the defining characteristic of juvenile hallux valgus. The success of surgical correction of a juvenile hallux valgus deformity is intimately associated with the magnitude of the DMAA. Moderate and severe pes planus occurred in 17% of cases, which was no different than the incidence in the normal population. No recurrences occurred in the presence of pes planus. Pes planus was not thought to have an affect on occurrence or recurrence of deformity. Moderate and severe metatarsus adductus was noted in 22% of cases, a rate much higher than that in the normal population. The presence of metatarsus adductus did not affect the preoperative hallux valgus angle or the average surgical correction of the hallux valgus angle. Constricting footwear was noted by only 24% of patients as playing a role in the development of juvenile hallux valgus. There were six recurrences of the deformities and eight complications (six cases of postoperative hallux varus, one case of wire breakage, and one case of undercorrection).

scholarly journals Rotational Distal Chevron Osteotomy for Correction of Hallux Valgus Associated with Metatarsus Adductus and Large Distal Metatarsal Articular Angle

2019 ◽  
Vol 4 (4) ◽  
pp. 2473011419S0023
Author(s):  
Jae-Jung Jeong
Keyword(s):  
Hallux Valgus ◽  
Metatarsal Head ◽  
Metatarsal Osteotomy ◽  
Hallux Valgus Angle ◽  
Intermetatarsal Angle ◽  
First Metatarsal ◽  
Chevron Osteotomy ◽  
Valgus Angle ◽  
Before And After ◽  
Metatarsus Adductus

Category: Bunion Introduction/Purpose: Hallux valgus treatment in the setting of associated metatarsus adductus is less common and not well described. The presence of metatarsus adductus reduces the gap between the first and second metatarsals. Consequently, it complicates the measurement of the first-second intermetatarsal angle and can limit the area available for transposition of the first metatarsal head. If distal metatarsal articular angle (DMAA) is also increased here, it is difficult to correct. We investigated the effects of rotational distal chevron metatarsal osteotomy (DCMO) on hallux valgus associated with metatarsus adductus and increased DMAA. Methods: Twelve patients, (12 female, 15 feet), of average age 59 (SD 23) with symptomatic hallux valgus associated with metatarsus adductus and increased DMAA underwent a rotation DCMO and were reviewed at an average of 12 months postoperatively. Clinically preoperative and postoperative AOFAS hallux MP-IP scale and satisfaction after the surgery were analyzed. Radiologically hallux valgus angle, the 1st intermetatarsal angle, DMAA before and after the operation was analyzed. Results: Distal Chevron osteotomy was done in 15 cases. After DCMO, The distal fragment was translated to laterally as far as possible and rotated to reduce DMAA. Clinically AOFAS scale was increased from 65.3 points preoperatively to 92.2 points postoperatively. Two patients were not satisfied with the results. Radiologically hallux valgus angle was decreased from 21.8° preoperatively to 8.5° postoperatively. The first intermetatarsal angle was decreased from 11.8° preoperatively to 6.7° postoperatively. DMAA was decreased from 15.8° preoperatively to 5.5° postoperatively. Conclusion: The rotational DCMO was an effective procedure for correcting hallux valgus associated with metatarsus adductus and increased DMAA. It allowed good realignment of the first MTP joint without the need for lesser metatarsal surgery to reduce the metatarsus adductus.

Pes Planus Deformity and Its Association With Hallux Valgus Recurrence Following Scarf Osteotomy

2020 ◽  
Vol 41 (10) ◽  
pp. 1212-1218
Author(s):  
Gavin John Heyes ◽  
Amir R. Vosoughi ◽  
Lizzy Weigelt ◽  
Lyndon Mason ◽  
Andrew Molloy
Keyword(s):  
Hallux Valgus ◽  
P Value ◽  
Level Of Evidence ◽  
Pes Planus ◽  
First Metatarsal ◽  
Scarf Osteotomy ◽  
Metatarsal Angle ◽  
Valgus Angle ◽  
Akin Osteotomy

Background: Hallux valgus recurrence is an unsatisfactory complication, with many causes postulated. This study investigated the effect of pes planus on recurrence after scarf osteotomy. Methods: A total of 183 feet were retrospectively reviewed. All patients were treated with a scarf osteotomy and if required Akin osteotomy. We measured preoperative lateral talus first metatarsal angle (T1MA) to study pes planus; an angle of under −4 degrees was considered pes planus. We measured pre and postoperative hallux valgus angle (HVA), intermetatarsal angle (IMA), and sesamoid location. In total 164 feet were suitable for inclusion, with follow-up of at least 6 months (10 males and 154 females, mean age: 52 years). Results: Recurrence frequency (HVA greater than 15 degrees) was 27 feet (16%). Hallux valgus recurrence was not influenced by gender ( P value = .66) or preoperative IMA ( P value = .48). Preoperative HVA greater than 35 degrees was associated with increased frequency of recurrence ( P value = .004). Those with T1MA less than −10 degrees demonstrated progression in HVA and deterioration in sesamoid location up to 6 months postoperatively ( P value = .038). HVA did not progress beyond 6 months. The prevalence of recurrent hallux valgus with normal T1MA was 1%, in T1MA −4 to −10 degrees it was 29% and in T1MA less than −10 degrees it was 47% ( P value <.001). Breaks in T1MA less than −4 degrees were found at the naviculocuneiform joint in 68% of feet in this series. Conclusion: The prevalence of hallux valgus recurrence correlated with the severity of pes planus. Level of Evidence: Level III, retrospective cohort study.

scholarly journals Improvement of Valgus Deviation of the Lesser Toes of Moderate to Severe Hallux Valgus After Proximal Chevron Metatarsal Osteotomy and Akin Osteotomy

2018 ◽  
Vol 3 (3) ◽  
pp. 2473011418S0027
Author(s):  
Hong-Geun Jung ◽  
Hwa Jun Kang ◽  
Juan Agustin Coruna
Keyword(s):  
Hallux Valgus ◽  
Metatarsal Osteotomy ◽  
Metatarsal Angle ◽  
Valgus Angle ◽  
Significant Difference ◽  
Akin Osteotomy ◽  
The Mean ◽  
Severe Hallux Valgus ◽  
Mtp Joints

Category: Lesser Toes Introduction/Purpose: The valgus deviation of lesser toes is often found in the hallux valgus patients. It has been known that valgus deviation of lesser toes remain unchanged even after correction of hallux valgus. The purpose of this study was to determine whether valgus deviation of lesser toes can be corrected after proximal chevron metatarsal osteotomy (PCMO) and Akin osteotomy for the hallux valgus patients, and to evaluate the factors affecting the degree of correction. Methods: The study is based on 116 feet (89 patients) of moderate to severe hallux valgus that underwent proximal chevron metatarsal osteotomy with Akin ostetomy. Hallux valgus angle (HVA), inter-metatarsal angle (IMA), valgus angle of 2nd, 3 rd, 4th metatarso-phalangeal joint were assessed preoperatively and postoperative 6 month, 1 year and yearly. VAS pain cores, American Orthopedic Foot and Ankle Society metatarsophalangeal-interphalangeal (AOFAS MTP-IP) scale and patient satisfaction were evaluated preoperatively and at subsequent follow-up. Results: The average follow-up was 30.6 months (range,12-99). The mean HVA and IMA reduced from 34.4° to 8.7° and 15.9° to 5.3° respectively at the final follow-up. Patients with more severe HVA showed higher degree of valgus deviation of lesser toes than those with lesser HVA. The valgus angle of 2nd,3 rd,4th MTP joints reduced from 8.9°, 6.7°, 2.4° preoperatively to 5.6°, 4.9°, 1.3° respectively at the final follow-up (p<0.05). The more HVA corrected, the more valgus deviation of lesser toe was found corrected. There was no significant difference in the degree of lesser toe correction angle according to follow up period after postoperative 1 year. The mean VAS and AOFAS scores significantly improved from 6.0, 60.9 to 1.2, 92.0 at the final follow-up, respectively (P<0.05). Conclusion: Unlike the previous reports, the current study showed significant reduction of the valgus angle of 2nd, 3 rd, 4th MTP joints after PCMO and Akin osteotomy for the moderate to severe HV without additional corrective lesser toe surgery.

scholarly journals Proximal Opening Wedge Osteotomy With Distal Chevron Osteotomy of the First Metatarsal for the Treatment of Moderate to Severe Hallux Valgus

2018 ◽  
Vol 40 (1) ◽  
pp. 89-97 ◽  
Author(s):  
Matthias Braito ◽  
Dietmar Dammerer ◽  
Philipp Hofer-Picout ◽  
Gerhard Kaufmann
Keyword(s):  
Wound Infection ◽  
Hallux Valgus ◽  
Case Series ◽  
Wedge Osteotomy ◽  
Metatarsal Osteotomy ◽  
Level Of Evidence ◽  
Opening Wedge ◽  
First Metatarsal ◽  
Chevron Osteotomy ◽  
Severe Hallux Valgus

Background: The aim of this study was to assess radiographic and clinical outcomes after double osteotomy with proximal opening wedge first metatarsal osteotomy and first metatarsal distal chevron osteotomy in the treatment of moderate to severe hallux valgus. Methods: 33 patients (4 male, 29 female; 36 feet; average age 60.7 years) were included in the study. Radiographic and clinical outcome in terms of intermetatarsal angle (IMA), hallux valgus angle (HVA), distal metatarsal articular angle (DMAA), and the American Orthopaedic Foot & Ankle Society metatarsophalangeal-interphalangeal hallux score (AOFAS MTP-IP hallux score) were investigated at 6 weeks, 6 months, and after an average of 28 (range, 7-123) months postoperatively. Results: Preoperative IMA, HVA, and DMMA showed statistically significant improvement ( P ≤ .05) from 19.1 ± 3.8 (8.9-27.3) degrees, 45.4 ± 8.7 (25.9-60.9) degrees, and 20.8 ± 8.9 (4.5-38.0) degrees to 6.0 ± 3.3 (0.4-12.2) degrees, 9.1 ± 8.9 (–6.7 to 39.0) degrees, and 6.4 ± 5.6 (–6.8 to 21.0) degrees at last follow-up, respectively. Postoperative AOFAS MTP-IP hallux score averaged 88.1 points. Overall, 10 complications were observed: hallux varus (3 feet), hallux valgus recurrence (3 feet), nonunion (1 foot), loss of fixation (1 foot), and wound infection (2 feet). Conclusion: Proximal opening wedge first metatarsal osteotomy with distal chevron osteotomy provided powerful correction of each component of moderate to severe hallux valgus but had a substantial rate of complications in terms of over- and undercorrection, nonunion, loss of fixation, and wound infection. Level of Evidence: Level IV, case series.

scholarly journals Distal Chevron Osteotomy Increases Anatomic Intermetatarsal Angle in Hallux Valgus

2020 ◽  
Vol 5 (4) ◽  
pp. 2473011420S0016
Author(s):  
Jeremy Y. Chan ◽  
Naudereh B. Noori ◽  
Stephanie Chen ◽  
Glenn B. Pfeffer ◽  
Timothy P. Charlton ◽  
...  
Keyword(s):  
Hallux Valgus ◽  
Case Series ◽  
Metatarsal Head ◽  
Rank Test ◽  
Metatarsal Osteotomy ◽  
Recurrence Rates ◽  
Intermetatarsal Angle ◽  
First Metatarsal ◽  
Chevron Osteotomy

Category: Bunion; Midfoot/Forefoot Introduction/Purpose: Loss of correction in hallux valgus (HV) deformity following distal chevron metatarsal osteotomy (DCO) has been demonstrated in short-term follow-up with HV recurrence rates of up to 75% reported in the long-term. The purpose of this study was to evaluate the radiographic effect of the DCO on the anatomic and mechanical axes of the first metatarsal. Our hypothesis was that patients undergoing DCO would have improvement in the mechanical metatarsal axis but worsening of the anatomic axis. Methods: This was a retrospective single surgeon case series of all patients who underwent DCO for HV between 2017 and 2019. Patients were included if they had both preoperative and postoperative weightbearing foot radiographs. The primary outcomes were the change in anatomic first-second intermetatarsal angle (a1-2IMA, defined by the metatarsal diaphyseal axis) and the change in mechanical first-second intermetatarsal angle (m1-2IMA, defined by the axis from the center of the metatarsal head to the metatarsal base). Secondary outcomes included the change in hallux valgus angle (HVA) and medial sesamoid position (medial sesamoid in relation to the mechanical axis of the metatarsal). Change in second-third intermetatarsal angle (2-3IMA, defined by the metatarsal diaphyseal axis) was measured to control for any inconsistencies in radiographic technique. Given the relatively small patient cohort, the non-parametric Wilcoxon signed rank test and Mann Whitney U test were used for statistical analysis. Results: 41 feet were included for analysis with a mean follow-up of 20.4 weeks. The a1-2IMA increased significantly (mean, 4.0 degrees, p<0.001) while the m1-2IMA decreased significantly (mean, 4.6 degrees, p<0.001) following DCO. There was a significant improvement in HVA (mean, 13.2 degrees, p<0.001). No changes were noted in 2-3IMA (mean, 0.0 degrees, p=0.834). (Table 1) Medial sesamoid position was improved in 22 feet (53.7%). Patients with improved sesamoid position were noted to have a significantly larger decrease in m1-2IMA (mean, 5.3 versus 3.8 degrees, p=0.01) and a smaller increase in a1-2IMA (mean, 3.4 versus 4.7 degrees, p=0.02) compared to patients with no improvement in sesamoid position. Conclusion: Distal chevron osteotomy for HV is associated with an increase in the anatomic intermetatarsal angle despite improvements in the m1-2IMA, HVA and medial sesamoid position. Patients with improved sesamoid position were associated with greater correction of the mechanical first metatarsal axis. Our findings may suggest the presence of intermetatarsal instability, which could limit the power of DCO in HV correction for more severe deformities and provide a mechanism for HV recurrence. [Table: see text]

Hallux Valgus Correction with Proximal Metatarsal Osteotomy: Two-year Follow-up

Foot & Ankle ◽  
1992 ◽  
Vol 13 (6) ◽  
pp. 321-326 ◽  
Author(s):  
David B. Thordarson ◽  
Edward O. Leventen
Keyword(s):  
Hallux Valgus ◽  
Metatarsal Osteotomy ◽  
Hallux Valgus Angle ◽  
Foot Surgery ◽  
Intermetatarsal Angle ◽  
First Metatarsal ◽  
Valgus Angle ◽  
Distal Metatarsal Osteotomy ◽  
Proximal Metatarsal Osteotomy

We evaluated the results of 33 feet in 23 patients who underwent a basilar crescentic osteotomy with a modified McBride procedure with a minimum 24-month follow-up. The average hallux valgus improved from 37.5° to 13.8° and the intermetatarsal 1–2 angle from 14.9° to 4.7°. The angle of declination of the first metatarsal was found to have dorsiflexed an average of 6.2°. Unfortunately, osteotomies secured with staples dorsiflexed to a greater degree. Bilateral foot surgery produced results similar to those with unilateral procedures. Four of our patients developed a hallux varus (range 2–8°); however, none were dissatisfied at the time of evaluation. Although this bunion procedure resulted in more prolonged swelling and pain than a distal osteotomy, it should be considered for more complex deformities to avoid the failure that a distal metatarsal osteotomy might produce given a high 1–2 intermetatarsal angle or a high hallux valgus angle.

scholarly journals Effect of Displacement Degree of Distal Chevron Osteotomy on Metatarsal Stress: A Finite Element Method

Biology ◽  
2022 ◽  
Vol 11 (1) ◽  
pp. 127
Author(s):  
Qiaolin Zhang ◽  
Yan Zhang ◽  
Jialu Huang ◽  
Ee Chon Teo ◽  
Yaodong Gu
Keyword(s):  
Finite Element ◽  
Soft Tissue ◽  
Hallux Valgus ◽  
Metatarsophalangeal Joint ◽  
Plantar Fascia ◽  
First Metatarsophalangeal Joint ◽  
Intermetatarsal Angle ◽  
First Metatarsal ◽  
Chevron Osteotomy ◽  
Valgus Angle

Background: The stress of foot bone can effectively evaluate the functional damage caused by foot deformity and the results of operation. In this study, the finite element method was used to investigate the degree of displacement of distal chevron osteotomy on metatarsal stress and metatarsophalangeal joint load; Methods: Four finite element models of displacement were established by using the CT images of a patient with moderate hallux valgus (hallux valgus angle and intermetatarsal angle were 26.74° and 14.09°, respectively), and the validity of the model was verified. Each finite element model consisted of bones and various cartilage structures, ligaments, and plantar fascia, as well as encapsulated soft tissue. Except for soft tissue, the material properties of other parts were isotropic linear elastic material, and the encapsulated soft tissue was set as nonlinear hyperelastic material. The mesh was tetrahedral mesh. Link elements were used in ligament and plantar fascia. A ground reaction force with a half-body weight was applied at the bottom of the floor to simulate the ground reaction when standing. The upper surfaces of the encapsulated soft tissue, distal tibia, and distal fibula were fixed. The stress distribution of metatarsals and the stress of cartilage of the first metatarsophalangeal joint were compared and analyzed; Results: Compared with the hallux valgus without osteotomy, the stress of the first metatarsals and second metatarsals of 2–4 mm decreased, and the stress of the interarticular cartilage of the first metatarsophalangeal joint with 4 mm was reduced. In the case of 6 mm, the stress value between the first metatarsal and the first metatarsophalangeal joint increased, and 4 mm was the most suitable distance; Conclusions: Compared with the hallux valgus without osteotomy, the stress of the first metatarsals and second metatarsals of 2–4 mm decreased, and the stress of the interarticular cartilage of the first metatarsophalangeal joint with 4 mm was reduced. In the case of 6 mm, the stress value between the first metatarsal and the first metatarsophalangeal joint increased, and 4 mm was the most suitable distance. For the degree of displacement of the distal chevron osteotomy, the postoperative stability and the stress distribution of metatarsal bone should be considered. Factors such as hallux valgus angle, intermetatarsal angle, patient’s age, body weight, and metatarsal width should be considered comprehensively. The factors affecting osteotomy need to be further explored. The degree of displacement of osteotomy can be evaluated by FE method before the operation, and the most suitable distance can be obtained.

scholarly journals TL 18129 - Surgical treatment of hallux valgus using the percutaneous chevron technique

2019 ◽  
Vol 13 (Supl 1) ◽  
pp. 85S
Author(s):  
Fábio Lemos Rodrigues ◽  
Luiz Carlos Ribeiro Lara ◽  
Juan Antônio Grajales ◽  
Lucio Carlos Azevedo Torres Filho
Keyword(s):  
Surgical Treatment ◽  
Hallux Valgus ◽  
Aofas Score ◽  
First Metatarsal ◽  
Chevron Osteotomy ◽  
Valgus Angle ◽  
Angular Correction ◽  
Before And After ◽  
The Mean ◽  
Severe Hallux Valgus

Objective: To clinically and radiographically observe the outcomes of the surgical treatment of moderate and severe hallux valgus using percutaneous distal chevron osteotomy. Methods: A total of 35 feet (33 patients) with moderate and severe hallux valgus were evaluated using the Couhling classification from June 2016 to January 2018. The mean patient age was 53 years, and the mean postoperative follow-up time was 13 months. All patients who underwent chevron osteotomy were evaluated before and after surgery using the American Orthopedic Foot and Ankle Society (AOFAS) scale. We measured the hallux valgus angle (HVA), the intermetatarsal angle (IMA) and the distal metatarsal articular angle (DMAA) using radiographic studies. Results: The AOFAS score increased by a mean of 54 points. The HVA decreased by a mean of 19°, the IMA by 7° and the DMAA by 11°. The median decrease in the length of the first metatarsal bone was 0.35 cm. Conclusion: Chevron osteotomy using the percutaneous surgical technique made it possible to correct moderate and severe hallux valgus deformities, with excellent angular correction and a significant increase in the AOFAS score.

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