Background -Hallux valgus (HV) is recognized as a triplanar foot deformity with optimal surgical results achieved when all three planes are addressed. We have previously reported on an ongoing 5-year, prospective, multicenter, clinical study using instrumented correction of the first tarsometatarsal joint (1st TMT) in patients with HV. Purpose -This report details interim 48-month results of this study, evaluating the impact of early postoperative tibial sesamoid position (TSP) on radiographic recurrence (postoperative hallux valgus angle (HVA) measurements of >15°), and whether radiographic recurrence impacted patient-reported outcomes. Study Design - One hundred seventy-three patients were included in this multicenter study, of whom 146 patients achieved their 48-month visit. Radiographic parameters were presented at baseline, 6 weeks and 48 months. This included intermetatarsal angle (IMA) along with TSP and HVA. Methods - Institutional review board approval was obtained for each study site. A consecutive cohort of patients were enrolled from November 2018 to April 2021 who received 1st TMT arthrodesis to correct their hallux valgus deformity. Inclusion and exclusion criteria were established. Results - At the 48-month follow-up, 12 patients (8.2%) had radiographic recurrence with an HVA>15°. Evaluation of TSP position at 6-weeks postoperative found that a TSP≤ 3 reduced the likelihood of recurrence by 95% compared to a TSP>3. Conclusion - The results of this interim analysis suggest that initial correction of axial rotation and sesamoid position of the first ray is important in maintaining correction long term and favorable patient reported outcomes.

Since 1911, the Lapidus procedure for bunionectomy has evolved from a severity-based indication to an anatomic based system. It addresses the hallux valgus deformity at the anatomic center of rotational and angulation and frontal, transverse, and sagittal plane deformities. It has been shown to be predicable in outcomes and has a low recurrence rate versus other bunion procedures.

Failure to address metatarsus adductus (MTA) with coexisting hallux valgus (HV) has resulted in mixed outcomes and increased deformity recurrence. The purpose of this study was to investigate early radiographic and clinical outcomes of a novel instrumented 2nd and 3rd TMT corrective arthrodesis combined with instrumented triplanar 1st TMT arthrodesis with early weightbearing. Radiographs and medical records from subjects undergoing this surgical approach were retrospectively reviewed. Forty-three subjects (N = 43 feet) with a mean ± SD age of 41.6 ± 14.2 (range 15 to 62) years were treated at four institutions with a mean ± SD follow-up time of 17.7 ± 10.6 (range 11.5 to 51.0) months. Radiographic parameters demonstrated improvements in the mean ± SD Sgarlato's angle (26.3 ± 5.7 to 10.2 ± 3.8 degrees), baseline 'True Intermetatarsal Angle' (23.2 ± 6.6 degrees) to measured Intermetatarsal Angle at final follow-up (3.7 ± 2.4 degrees), Hallux Valgus Angle (32.3 ± 8.4 to 7.2 ± 6.6 degrees), Tibial Sesamoid Position (5.0 ± 1.5 to 1.3 ± 1.1) and Osseous Foot Width (97.8 ± 7.0 to 86.8 ± 7.5 mm). The novel baseline Plumbline measurement was 93.0 % positive in the study cohort and converted to a negative reading following MTA correction in 90.7 % of subjects. All (N = 43) feet studied achieved stable arthrodesis at the time of final clinical and radiographic assessment. One patient required hardware removal. Radiographic outcomes of an instrumented triplanar correction and multi-planar locking plate fixation were promising with correction of the MTA and HV deformities and favorable healing noted.

BACKGROUND:Traditional hallux valgus surgery has been focused on two-dimensional repair with high reported recurrence rates. PURPOSE:We report the 4-year interim analysis of a prospective, 5-year, multicenter study of radiographic, clinical, and patient-reported outcomes following triplanar first tarsometatarsal arthrodesis with early weightbearing. STUDY DESIGN:This is a prospective, multicenter, clinical trial involving 7 US-based centers and 13 surgeons. One-hundred and seventy-three patients were treated, of whom 139 (80.3%) achieved their 48-month visit. Clinical and radiographic parameters were evaluated at all follow-up visits along with patient-reported outcomes [Visual Analog Scale (VAS), Manchester-Oxford Foot Questionnaire (MOxFQ) and Patient-Reported Outcomes Measurement Information System (PROMIS). METHODS:Institutional review board approval was obtained for each study site. A consecutive cohort of patients were enrolled from November 2018 to April 2021 who received first TMT arthrodesis to correct their symptomatic hallux valgus. Inclusion and exclusion criteria were established. RESULTS:Significant improvements in triplanar radiographic correction (hallux valgus angle, intermetatarsal angle, tibial sesamoid position, sagittal-plane IMA, and osseous foot width) were maintained at all timepoints. Using recurrence definitions of > 15° and 20° postoperative hallux valgus angle, recurrence rates were 8.4% (95% CI:4.27%, 14.53%) and 0.8% (95% CI:0.02%, 4.18%) at 48 months, respectively. Mean (95% CI) time to weightbearing in a boot walker was 7.7 (6.6, 8.8) days. CONCLUSION:The 4-year interim results of this prospective, multicenter study demonstrate favorable improvement of the triplanar hallux valgus deformity, maintenance of correction, low complication rate, and favorable patient-reported outcomes with early return to protected weightbearing.

Radiographic measurements for the assessment of metatarsus adductus (MTA) have a broad range of interpretation without a consensus regarding surgical indications. The “Plumbline” (PL) radiographic assessment method helps identify MTA and determines if physical space is available to align the first metatarsal to the longitudinal foot axis without the need to realign the lesser metatarsals. Forty-five neutral weight-bearing anterior-posterior (AP) radiographs of patients scheduled for surgical intervention for isolated hallux valgus (HV) or combined MTA/HV deformities were reviewed. The cohort was grouped based on the presence of MTA using a Sgarlato’s angle (SA) of 15°, with 23 patients in the HV-only group and 22 patients in the MTA group. A mean preoperative SA of 8.7° (SD: 2.1; range: 5.4-13.4) and 26.6° (SD: 5.1; range: 18.2-36) were found in the HV-only and MTA groups, respectively. Subjects with an SA ≤ 15° (N = 22) were found to have a negative PL (100%) and subjects with an SA > 15° (N = 23) displayed a positive PL (100%). The PL technique provided a simple method and clear visual reference for determining the presence of MTA in HV patients without the need to measure traditional radiographic angles. Level of Evidence: Retrospective, Level IV, Diagnostic

First metatarsal phalangeal joint and the first Tarsometatarsal arthrodesis have both been used for deformity correction and treatment of pain and arthritis. Concomitant arthrodesis of the first metatarsophalangeal and first tarsometatarsal joints (Double First Ray Arthrodesis) has rarely been described. We surveyed 29 patients who underwent double first-ray arthrodesis for primary or revision correction of hallux valgus. A custom questionnaire was used to assess their activities of daily living and sports activity at a mean follow-up of 19.6 months (median 18.4 months). Secondary endpoints were return to activity, deformity correction, and arthrodesis healing rate. The primary outcomes showed an excellent return to activities of daily living with 96.6% of patients capable of walking as much as they liked after surgery at a normal pace. About 96.6% reported they felt that their surgery was successful, they had no pain, and the loss of motion at the joint fusion sites did not affect their ability to perform daily activities. Protected walking in a fracture boot was initiated at a mean (SD) of 9.8 (9.9) days. Return to an athletic shoe occurred at a mean (SD) of 44.2 (11.7) days. Full unrestricted activity was at a mean (SD) of 105.2 (19.3) days with 65% of the patient group reporting that their recovery was easier than expected. There was 1 nonunion and no other complications. This data set supports the hypothesis that patients undergoing double first-ray arthrodesis can return to activities of daily living and sports with and low complication rate.

There have been many reports describing the proposed alignment of a first metatarsal phalangeal arthrodesis to obtain optimum function. Most of these recommendations are based upon historical and anecdotal evidence. Furthermore, there are few reports directly comparing alignment to patient reported function. We studied radiographic sagittal plane alignment in a group of 60 patients (80 feet) who had undergone a first metatarsal phalangeal joint arthrodesis (20 of the 60 had bilateral arthrodesis) to better understand how this component of the arthrodesis position translates to real world function. The patients in this study had completed a functional survey in 2022 at a mean of 28.4 (median 27.8; range 13.2-45.7) months with very high satisfaction for return to activities of daily living and recreational sports. We measured the sagittal plane position of the first metatarsal relative to the proximal phalanx in this cohort with known post operative activity data. We found that a mean (standard of deviation) sagittal plane angle (angle between the anatomic axis of the first metatarsal and the proximal phalanx) of 15.4 (SD 7.4) degrees and a proximal phalanx head to ground height of 12.7 (SD 3.3) mm was present in this group. Comparing the functional and positional results we conclude that this sagittal plane position provides a good recommendation for alignment.

Category: Bunion Introduction/Purpose: Historically, two-dimensional radiographic study techniques have been used to classify and describe hallux valgus deformities and guided treatment based on severity of deformity in the transverse plane only. These two-dimensional radiographic studies and were not able to assess rotational deformity and may explain the high recurrence and dissatisfaction rates which have been reported. Recently, a triplanar hallux abducto valgus classification (THAVC) system was proposed. This key elements of this classification system are the pathologic alignments in all three anatomic planes. The THAVC system is intended to clarify the deformity and apply a triplanar anatomic algorithm for treatment. To our knowledge, this classification system has not been validated. Our objective was to assess the intra-reader and inter-reader reliability of the THAVC. Methods: After approval by the Institutional Review Board, patients with hallux abducto valgus (HAV) were identified from a foot and ankle registry. Electronic medical records and digital radiographs were reviewed by the principal investigator (PI). Selected radiographs were then deidentified of patient information and assembled in a digital slide presentation and presented to the reviewers. The eligibility criteria required complete weightbearing radiographic studies and represented varying degrees of HAV. The reviewers included three board certified, fellowship trained orthopaedic foot and ankle surgeons. Images of twenty cases of hallux valgus and five normal cases were distributed electronically, who independently classified all 25 cases according to the THAVC system for a total of 75 observations. After an eight week washout period, the order of the HAV cases was randomized and redistributed to the reviewers. The three reviewers were blinded to the results of the both radiographic reviews until after statistical analysis had occurred. Results: We evaluated the intra-reader consistency by Cohen's kappa for the agreement between two measurements from the same reader. The average kappa value from three readers was 0.241 with 95% CI (0.093-0.374), indicating a fair agreement. The inter-reader agreement was 0.046 with 95% CI (-0.041-0.112), showing poor agreement between readers. Conclusion: The Triplanar HAV Classification is the first classification system that utilizes anatomic, multi-plane evaluation. Our results indicate while this is the first known HAV classification system, by this analysis it lacks reliability. This study shows that the reading of 2D radiographs still present a difficulty in assessing a 3D problem. Perhaps a scoring system utilizing advanced imaging such as 3D WBCT could prove more reliable and applicable.

Category: Bunion; Midfoot/Forefoot Introduction/Purpose: The pathogenesis of the hallux valgus deformity is still poorly understood. Consistent observations of the 1st tarsometatarsal (TMT) joint as the CORA of hallux valgus raises questions about pathology associated with that joint. Mason and Tanaka studied the 1st TMT joint in cadaveric specimens in 2012, observing three morphological subtypes to the 1st cuneiform articular surface. They noted that specimens with hallux valgus had either a unifacet (37%) or bifacet (63%) appearance, where normal feet had a trifacet appearance. This observation suggests that these bony differences may be responsible for 'instability' that generates the metatarsal deviation into varus, and thus the development of hallux valgus. If true, surgical corrections for hallux valgus deformity should address this TMT joint pathology. Methods: This study was designed to correlate the morphological differences of the TMT joint with symptomatic hallux valgus patients who are seeking surgery. The hypothesis was that the hallux valgus patients would show a majority unifacet and bifacet morphology and have an inclination towards unifacet in younger patients and patients with a larger deformity. The cohort of patients who are in the registered longitudinal study Align3D had their TMT joints harvested in a standard fashion as part of their surgical treatment. These specimens were analyzed for the number of facets by the surgeon at the time of their surgical procedure. This cohort therefore only includes symptomatic hallux valgus patients and eliminates hallux valgus associated with metatarsus adductus. Standard weight-bearing x-rays taken pre-operatively were analyzed for severity of deformities. Functional and Patient Reported Outcome measures were obtained pre-operatively and post-operatively. Results: In this study we observed 143 specimens. Unifacet was observed in 116 specimens (81.1%), bifacet was observed in 26 specimens (18.2%), and trifacet was observed in 1 specimen. Neither X-Ray findings, age, nor Functional Scores suggested a trend in severity in relation to morphological type. Mason & Tanaka's cadaveric study was limited in some respects because of the hardening effect of formaldehyde preservations. Their study represented an elderly population, mean age 86 years, whereas this study represented a much younger population, mean age 40.6, in which patients were able to participate in both X-Ray and clinical scoring. To the best of our knowledge, this is the first time that morphology of the TMT joint has been studied in symptomatic hallux valgus patients who underwent surgery. Conclusion: Symptomatic hallux valgus deformities are associated with a higher likelihood of having a unifacet morphology than previously reported in cadavers (81.1% vs 37%). This morphology may predispose patients to decreased stability resulting in more symptomatic deformity. The number of facets does not seem to correlate with severity of deformity on X-Ray evaluation, nor does it correlate with age. However, the younger age group in our study as compared to Mason and Tanaks's study suggests that morphological differences may even be congenital, leading to later development of deformity.

The fibrocartilaginous component of the plantar plate offers stability at the metatarsophalangeal joint. In conjunction with the attachments of the deep transverse metatarsal ligaments and collateral ligaments, the plantar plate complex resists tensile forces anchored by the plantar fascia and compression forces under the metatarsal heads.

Category: Bunion; Midfoot/Forefoot Introduction/Purpose: The majority of hallux valgus corrections are performed via a two dimensional approach with 1st metatarsal osteotomy and translation in the transverse plane. This approach has demonstrated high long-term recurrence rates. Recent research demonstrates that 87% of hallux valgus deformities are three-dimensional with abnormal frontal-plane rotation of the metatarsal, which cannot be completely addressed with a two dimensional metatarsal osteotomy alone. While correction at the 1st tarsometatarsal (TMT) joint may provide the optimal surgical approach for 3D anatomic restoration at the apex of the deformity, 1st TMT fusion entails an extended period of non-weightbearing. This study evaluated the clinical, radiographic, and patient-reported outcomes in patients undergoing instrumented triplanar 1st TMT arthrodesis (TMTA) with a biplanar plating system and protected near-immediate weightbearing. Methods: This is a prospective multicenter study that will continue for 60 months post-operatively. Patients between 14-58 years old with symptomatic hallux valgus (intermetatarsal and hallux valgus angles between 10.0-22.0° and 16.0-40.0°, respectively) and no prior hallux valgus surgery on the operative foot are eligible for this study. Patients are treated with an instrumented TMTA procedure using a biplanar plating system with protected near-immediate weightbearing. Several outcomes (radiographic, range of motion (ROM), return to weightbearing and activities, pain measured by visual analog scale (VAS), Manchester-Oxford Foot Questionnaire (MOxFQ), and Patient Reported Outcomes Measurement Information System (PROMIS)) are evaluated post- operatively. Two independent fellowship trained musculoskeletal radiologists reviewed all radiographic data. These interim results are limited to patients completing at least 6 months of follow-up. Results: At time of analysis, 121 patients had undergone TMTA with at least 6 months of follow-up. Mean age was 40.6 (range:15- 58) years, and 91% of patients were female. Mean (SD) days to protected weightbearing in CAM boot, return to work, and return to full work were 8.2 (6.8), 24.0 (29.5), and 51.2 (44.0), respectively. Significant improvements (p<0.05) from baseline in HVA, IMA, and TSP (Table 1), VAS score, MOxFQ and PROMIS domains were observed as early as 6 weeks post-procedure. At 12 months, mean (95% CI) change in VAS score was -4.0 (-4.5, -3.6); Walking/Standing, Pain, and Social Interaction (MOxFQ domains) change was -38.6 (-43.6, -33.5), -41.0 (-45.8, -36.2), and -40.5 (-45.3, -35.7), respectively; and physical function (PROMIS) change was 8.7 (6.6, 10.8). Conclusion: These interim findings support that TMTA with biplanar plating is successful in correcting the 3D hallux valgus deformity with early return to weightbearing while demonstrating favorable clinical and patient-reported outcomes. Patients exhibited meaningful pain reduction after surgery and were able to return to full, unrestricted work and activities in less than two months, on average. Statistically significant improvements in patients' health-related quality of life were observed at 6 and 12 months, post-operatively. Patients will continue to be followed for up to 60 months with additional evaluations for complications, 24-month recurrence, and patient satisfaction.

We report one- and 2-year results of a prospective, 5-year, multicenter study of radiographic, clinical, and patient-reported outcomes following triplanar first tarsometatarsal arthrodesis with early weightbearing. One-hundred and seventeen patients were included with a mean (95% confidence interval [CI]) follow-up time of 16.6 (15.5, 17.7) months. Mean (95% CI) time to weightbearing in a boot walker was 7.8 (6.6, 9.1) days, mean time to return to athletic shoes was 45.0 (43.5, 46.6) days, and mean time to return to unrestricted activity was 121.0 (114.5, 127.5) days. There was a significant improvement in radiographic measures with a mean corrective change of -18.0° (-19.6, -16.4) for hallux valgus angle, -8.3° (-8.9, -7.8) for intermetatarsal angle and -2.9 (-3.2, -2.7) for tibial sesamoid position at 12 months (n = 108). Additionally, there was a significant improvement in patient-reported outcomes (Visual Analog Scale, Manchester-Oxford Foot Questionnaire, and Patient-Reported Outcomes Measurement Information System) and changes were maintained at 12 and 24 months postoperatively. There was 1/117 (0.9%) reported recurrence of hallux valgus at 12 months. There were 16/117 (13.7%) subjects who experienced clinical complications of which 10/117 (8.5%) were related to hardware. Of the 7/117 (6.0%) who underwent reoperation, only 1/117 (0.9%) underwent surgery for a nonunion. The results of the interim report of this prospective, multicenter study demonstrate favorable clinical and radiographic improvement of the HV deformity, early return to weightbearing, low recurrence, and low rate of complications.

Charcot Marie Tooth (CMT) disease is a progressive neuromuscular disorder that is often the underlying condition involved in the development of a symptomatic cavovarus foot. End-stage foot deformities frequently result in triple arthrodesis procedures performed later in the disease process. The main surgical goal is to achieve a stable, plantigrade foot. Ideally, treatment would avoid triple arthrodesis as this procedure increases adjacent joint demands and expedites development of resultant arthrosis. Some authors have stated that earlier intervention by tendon balancing techniques may alleviate the need for joint fusions in the future. Therefore, the timing of surgical intervention is paramount in the medical decision making process. Our case series reviews mid-stage cavovarus progression in patients with pedal instability and gait disturbances. Realignment subtalar arthrodesis is utilized to improve Kite’s angle, reduce heel varus and re-establish subtalar joint (STJ) stability. Tendon balancing procedures should be performed in conjunction with STJ arthrodesis in order to achieve long standing correction and hopefully prevent the future need for conversion to triple arthrodesis.

Successful deformity correction utilizing first metatarsophalangeal (MTP) fusion for hallux valgus with concomitant degenerative changes of the first MTP joint is well documented. Currently, there is limited discussion in the literature focusing on triplanar correction of the first MTP arthrodesis. Presented is a novel approach for triplane correction and fusion of the first MTP joint utilizing a biplanar locked plating system.

The presence of metatarsus adductus (MTA) adds complexity to the diagnosis and treatment of hallux valgus (HV). Identification and careful analysis of these combined deformities is of paramount importance. The inability to completely correct HV and an increased incidence of recurrence has been established when MTA deformity is present. We present an option for correction of the combined deformities with multiplanar angular correction arthrodesis of the first, second, and third tarsometatarsal (TMT) joints.

Category: Bunion; Midfoot/Forefoot Introduction/Purpose: Early radiographic outcomes of hallux valgus correction focusing on multiplanar deformity have shown promising results. Surgical correction for patients with preexisting metatarsus adductus is considered more challenging and results in higher recurrence rates following hallux valgus surgery. The purpose of this study was to evaluate the impact of preoperative metatarsus adductus on surgical correction following triplanar first tarsometatarsal (TMT) arthrodesis with early weightbearing for hallux valgus. Methods: A retrospective review was performed of 57 patients (62 feet) aged 39.7 +- 18.9 years who underwent triplanar first TMT arthrodesis between 2015 and 2017 at four institutions. After the operation, patients were allowed early full weightbearing in a walking boot. Patients were grouped based on preoperative metatarsus adductus angles for comparison. Preoperative imaging was reviewed and compared to radiographic imaging at 12 months postoperative. Hallux valgus angle (HVA), intermetatarsal angle (IMA), tibial sesamoid position (TSP), lateral round sign, and sesamoid subluxation (axial) were evaluated. For statistical analysis, one-way analysis of variance (ANOVA) and chi-square tests were performed using JMP 11.0.0 (SAS Institute Inc., Cary, NC). Results: Patients with a preoperative metatarsus adductus angle greater than 20 degrees had significantly higher HVA at 12 months (p = 0.0165). There were no differences in IMA or TSP at 12 months based on preoperative metatarsus adductus (p = 0.7687 and p = 0.8703, respectively). Overall recurrence rate for hallux valgus was 3.2% (2/62 patients), and both of these patients had a preoperative metatarsus adductus greater than 20 degrees. There was significantly more sesamoid axial subluxation at 12 months for patients with preoperative metatarsus adductus greater than 20 degrees (p = 0.0092). Overall, the symptomatic non- union rate was 1.7% (1/62 patients). Conclusion: Preoperative metatarsus adductus greater than 20 degrees resulted in higher HVA and recurrence rates at 12 months after triplanar tarsometatarsal arthrodesis. For patients with preexisting metatarsus adductus, additional consideration should be given to ensure the sesamoids are properly reduced under the crista. Future studies should compare the long-term impact of metatarsus adductus on surgical correction, recurrence, and complications after triplanar tarsometatarsal arthrodesis.

Background: The Lapidus procedure using planar saw resection has often been criticized for complications related to excessive shortening and elevation of the first ray. The goal of this study was to assess the amount of shortening that occurs when using a cutting guide for controlled saw resection of the first tarsometatarsal (TMT) joint surfaces, along with assessment of deformity correction in all 3 anatomic planes. Methods: A prospective multicenter study with IRB approval included 35 hallux valgus subjects evaluated at baseline and 6 months following instrumented triplane first TMT arthrodesis without lesser metatarsal osteotomies. Results: The average first ray bone segment length loss was 3.1 mm (95% confidence interval [CI] 2.4-3.7) in the anteroposterior (AP) radiographic assessment and 2.4 mm (95% CI 1.7-3.1) in the sagittal plane. The mean preoperative radiographic measurements were 1.7 degrees (dorsiflexion) for sagittal plane angle, 13.8 degrees for intermetatarsal angle (IMA), and 5.1 for tibial sesamoid position (TSP). Improvements were seen postoperatively for all measures with a mean difference of –0.2 degrees (95% CI –1.0 to 0.6) for sagittal plane angle, –9.2 degrees (95% CI –10.1 to –8.3 degrees) for IMA, and –3.5 (95% CI –4.0 to –3.1) for TSP. Five of the patients reported lesser metatarsal pain preoperatively, and no patients complained of lesser metatarsalgia at 6-month follow-up. Conclusions: Minimal length loss of the first ray can be expected following instrumented triplane TMT arthrodesis while achieving full 3-dimensional deformity correction and reducing the risk of lesser metatarsalgia. Level of Evidence: Level II, prospective comparative study.

Background: Foot width reduction is a desirable cosmetic and functional outcome for patients with hallux valgus. Triplanar first tarsometatarsal (TMT) arthrodesis could achieve this goal by 3-dimensional correction of the deformity. The aim of this study was to evaluate changes in bony and soft tissue width in patients undergoing triplanar first TMT arthrodesis. Methods: After receiving Institutional Review Board approval, charts were retrospectively reviewed for patients undergoing triplanar first TMT arthrodesis for hallux valgus at 4 institutions between 2016 and 2019. Patients who underwent concomitant first metatarsal head osteotomies (eg, Silver or Chevron) or fifth metatarsal osteotomies were excluded. Preoperative and postoperative anteroposterior weightbearing radiographs were compared to evaluate for changes in bony and soft tissue width. One hundred forty-eight feet from 144 patients (48.1 ± 15.7 years, 92.5% female) met inclusion criteria. Results: Preoperative osseous foot width was 96.2 mm, compared to 85.8 mm postoperatively ( P < .001). Preoperative soft tissue width was 106.6 mm, compared to 99.3 mm postoperatively ( P < .001). Postoperatively, patients had an average 10.4 ± 4.0 mm reduction (10.8% reduction) in osseous width and average 7.3 ± 4.0 mm reduction (6.8% reduction) in soft tissue width. Conclusions: Triplanar first TMT arthrodesis reduced both osseous and soft tissue foot width, providing a desirable cosmetic and functional outcome for patients with hallux valgus. Future studies are needed to determine if patient satisfaction and outcome measures correlate with reductions in foot width. Level of evidence : Level III, retrospective comparative study