Short-term clinical and radiologic results of the scarf osteotomy: what factors contribute to recurrence?

Revision of Recurrent Hallux Valgus Deformity Using a Percutaneous Distal Transverse Osteotomy: Surgical Considerations and Early Results

Hallux valgus (HV) is a common forefoot deformity that can cause pain and difficulty with walking. There are a range of surgical techniques to treat HV deformity, but there is a risk of recurrence. This article reviews the clinical assessment and management of recurrent HV as well as a detailed description of how percutaneous surgical techniques can be used to treat recurrent HV. Overall, percutaneous surgical techniques using a transverse osteotomy and distal screw fixation can successfully treat a wide range of recurrent deformity severities with significant improvement in clinical and radiographic outcomes.

Subtalar arthroereisis for simultaneous treatment of flexible pes planus during surgical correction of hallux valgus

BACKGROUND

Scarf osteotomy is a well-established procedure for hallux valgus, yet recurrence rates range from 3.6% to 10%. Pes planus, which often coexisting with hallux valgus, is a risk factor for recurrence. This study aimed to evaluate the effectiveness of simultaneous correction of hallux valgus and flexible pes planus.

METHODS

A total of 85 feet with hallux valgus associated with adult flexible pes planus were retrospectively reviewed. All patients were treated with scarf osteotomy (SO). Subtalar arthroereisis using a HyProCure implant (SOH) was performed to correct hindfoot valgus based on shared decision-making. We collected and compared pre- and at least 2 year postoperative clinical outcomes (American Orthopaedic Foot & Ankle Society (AOFAS) forefoot, hindfoot score, Visual Analog Scale (VAS) pain intensity) and radiographic outcomes (hallux valgus angle (HVA), intermetatarsal angle (IMA), Meary's angle, talonavicular coverage angle (TNCA), and calcaneal pitch (CP) angle in both groups.

RESULTS

Of the cases reviewed, 51 feet were allocated to SO group, and 34 feet were in SOH group. Recurrence frequency was 5 feet (9.8%) in the SO group, while no recurrences were reported in the SOH group. There was no significant difference in AOFAS forefoot and VAS scores between the groups, However, the SOH group demonstrated significant improvement in AOFAS hindfoot scores and CP angle, as well as a greater reduction in Meary's angle and TNCA, compared to the SO group. Changes in HVA and IMA did not differ significantly between the groups. Three feet in the SOH group experienced sinus tarsi pain, which resolved after removal of the HyProCure implant.

CONCLUSIONS

Subtalar arthroereisis with a HyProCure implant is an effective treatment option for adult flexible pes planus associated with scarf osteotomy for hallux valgus, leading to a steady improvement in the patients forefoot deformity and increased patient satisfaction at least 2 years postoperatively.

Current concepts of fourth-generation minimally invasive and open hallux valgus surgery

Hallux valgus (HV) presents as a common forefoot deformity that causes problems with pain, mobility, footwear, and quality of life. The most common open correction used in the UK is the Scarf and Akin osteotomy, which has good clinical and radiological outcomes and high levels of patient satisfaction when used to treat a varying degrees of deformity. However, there are concerns regarding recurrence rates and long-term outcomes. Minimally invasive or percutaneous surgery (MIS) has gained popularity, offering the potential for similar clinical and radiological outcomes with reduced postoperative pain and smaller scars. Despite this, MIS techniques vary widely, hindering comparison and standardization. This review evaluates the evidence for both open Scarf and Akin osteotomy and newer-generation MIS techniques. Fourth-generation MIS emphasizes multiplanar rotational deformity correction through stable fixation. While MIS techniques show promise, their evidence mainly comprises single-surgeon case series. Comparative studies between open and MIS techniques suggest similar clinical and radiological outcomes, although MIS may offer advantages in scar length and less early postoperative pain. MIS may afford superior correction in severe deformity and lower recurrence rates due to correcting the bony deformity rather than soft-tissue correction. Recurrence remains a challenge in HV surgery, necessitating long-term follow-up and standardized outcome measures for assessment. Any comparison between the techniques requires comparative studies. Surgeons must weigh the advantages and risks of both open and MIS approaches in collaboration with patients to determine the most suitable treatment.

Long-Term Results After Hallux Valgus Correction with Distal Metatarsal Reversed-L (ReveL) Osteotomy: Factors That Influence Recurrence and the Clinical Outcome

Background

This study aimed to evaluate the long-term results of hallux valgus correction with a distal metatarsal reversed-L (ReveL) osteotomy.

Methods

Eighty-eight patients (131 feet) were evaluated after a mean follow-up of 14.2 years (range, 10 to 18 years). Weight-bearing foot radiographs were analyzed preoperatively, at 6 weeks postoperatively, and at the final follow-up for the following parameters: hallux valgus angle (HVA), intermetatarsal angle (IMA), first metatarsophalangeal joint (MTPJ) congruence angle, sesamoid position, presence of the round sign, and first MTPJ arthritis. The visual analog scale (VAS) and the Foot and Ankle Outcome Score (FAOS) assessed postoperative pain and function. Univariate and multivariable logistic regression analyses identified risk factors for hallux valgus recurrence and an inferior clinical outcome.

Results

All radiographic parameters significantly improved at the 6-week follow-up and the final follow-up (p < 0.001). The recurrence rate (HVA >20°) was 14%. A preoperative HVA of >28° (odds ratio [OR], 9.1; p = 0.02) and a 6-week postoperative HVA of >15° (OR, 4.6; p = 0.03) were independent risk factors for recurrence. At the final follow-up, all FAOS subscales resembled high postoperative function (median, 100 points [range of the interquartile range (IQR), 81 to 100 points]). A preoperative body mass index of >30 kg/m2 was associated with lower FAOS quality of life (QOL) (p = 0.04), and postoperative hallux varus was associated with lower FAOS activities of daily living (p = 0.048). Patients with first MTPJ arthritis of grade 2 or higher at the final follow-up had significantly lower FAOS subscales (p < 0.01) except for QOL. Hallux valgus recurrence did not influence the long-term outcome. A symptomatic implant was the main cause of revision (15%). In 94% of cases, the patients were satisfied with the hallux appearance and, in 92% of cases, the patients were satisfied with postoperative pain reduction.

Conclusions

Hallux valgus correction with a ReveL osteotomy led to high long-term satisfaction rates. A preoperative HVA of >28° and a 6-week postoperative HVA of >15° increased the risk of hallux valgus recurrence. First MTPJ arthritis was the leading cause of inferior clinical results, whereas radiographic hallux valgus recurrence had no impact on the clinical results. First MTPJ arthritis at the final follow-up was associated with an inferior clinical outcome, whereas radiographic hallux valgus recurrence had no impact on the long-term clinical results.

Level of Evidence

Therapeutic Level IV. See Instructions for Authors for a complete description of levels of evidence.

Radiological Analysis of the Syndesmosis Concept in Metatarsus Primus Varus and Hallux Valgus Deformities Recurrence Prevention

Hallux valgus (HV) is a common deformity of the foot. Its postoperative recurrence is not uncommon and is closely related to the recurrence of its underlying metatarsus primus varus (MPV) deformity. The syndesmosis procedure uses 1 to 2 intermetatarsal cerclage sutures to realign the first metatarsal and then induces a biological bonding between the 2 metatarsals to prevent the MPV deformity from recurring. This radiological study aimed to assess its effectiveness in long-term MPV and HV deformities recurrence prevention. Ninety-two feet of 51 consecutive patients had syndesmosis procedures that were prospectively followed up for more than 1 y and up to 14 y, averaging 100.5 (SD 45.2) months. Patients underwent X-ray examinations regularly at fixed intervals of their feet. We used Hardy's methods in measuring the intermetatarsal angle (IMA), hallux valgus angle (HVA), and medial sesamoid position from standing foot X-rays. More than 450 relevant X-ray and photo images were submitted as Supplementary Material for online viewing and reference. There was a significant final correction of IMA from 14.30° (SD 2.70) to 6.70° (SD 1.75) (p < .0001). There was no significant increase in IMA after the sixth postoperative month to their final follow-up endpoints, regardless of their lengths. There was a significant final correction of HVA from 31.95° (SD 7.45) to 19.1° (SD 7.45) (p < .0001). This study reconfirmed past findings that the MPV deformity could be corrected without osteotomies. Creating a syndesmosis-like intermetatarsal bonding was effective for long-term MPV recurrence prevention. Three feet had postoperative stress fracture of the second metatarsal. However, the HV deformity correction was less satisfactory, and the reasons were explained.

A Cadaveric Study Verifying the Potential of a Rotational Biplanar Chevron Osteotomy to Correct the 3-Dimensional Hallux Valgus Deformity

INTRODUCTION

Metatarsal pronation is present in 87% of patients with hallux valgus (HV) deformity. The chevron osteotomy is commonly used worldwide to correct mild to moderate HV deformities. Many modifications have been described, but few address the rotational deformity of the first metatarsal. The rotational biplanar chevron osteotomy (RBCO), described by M. Prado et al, presents a variation of a biplanar chevron osteotomy that can be used to address first metatarsal rotation. The objective of this study is to investigate and verify the technique of the RBCO.

METHODS

We conducted our study performing an RBCO on 9 cadaveric limbs. The technique uses a medial-based wedge parallel to the plantar limb of the osteotomy to make the distal fragment free to correct rotation. A goniometer was used by 2 individual surgeons to control the rotational correction achieved.

RESULTS

The osteotomy was considered simple to perform and we experienced no complications, such as fractures or instability. The result was satisfactory alignment and adequate stability. On average, a 2 mm wedge resulted in 11° of rotational correction.

CONCLUSION

We predict that RBCO can safely be used for correcting the metatarsal rotation when necessary in mild to moderate HV deformity foot.

LEVELS OF EVIDENCE

Level IV.

Evaluate the Influencing Factors of Congruency of the First Metatarsophalangeal Joint in Hallux Valgus Based on Weightbearing CT

The purpose of this study was to explore the difference between congruency and incongruency of the first metatarsophalangeal (MTP) joint in hallux valgus using weightbearing CT (WBCT) and to identify the risk factors for incongruency. From January 2019 to January 2021, WBCT scans were retrospectively analyzed for 110 (191 feet) consecutive patients. According to whether the metatarsal articular surface and phalanx articular surface were parallel, they were divided into congruency (73 feet) and incongruency groups (118 feet). The age, intermetatarsal angle (IMA), hallux valgus angle (HVA), distal metatarsal articular surface angle (DMAA), first metatarsal coronal pronation angle (α angle), tibial sesamoid 7 positions (TSP), and tibial sesamoid coronal grading (TSCG) were compared between the 2 groups. Binary logistic regression was used to analyze the influencing factors of incongruency. Receiver operating characteristic (ROC) curve analysis was applied to determine the cutoff value. There were significant differences in IMA, HVA, DMAA, α angle, age, TSP, and TSCG between congruency and incongruency groups (p < .05). Binary logistic regression analysis showed that TSCG, HVA, α angle were the influencing factors of incongruency. ROC curve analysis demonstrated that the cutoff values for incongruency were 1 position for TSCG (sensitivity: 0.835; specificity: 0.884) with the area under curve (AUC) of 0.892, 30° (sensitivity: 0.795; specificity: 0.812) for HVA with the AUC of 0.878, and 24° (sensitivity: 0.530; specificity: 0.797) for α angle with the AUC of 0.686. Incongruency of the first MTP joint indicated a more severe hallux valgus, and was associated with increased HVA, α angle, and TSCG.

Republication of "Proximal Rotational Metatarsal Osteotomy for Hallux Valgus (PROMO): Short-term Prospective Case Series With a Novel Technique and Topic Review"

Background

Hallux valgus deformity consists of a lateral deviation of the great toe, metatarsus varus, and pronation of the first metatarsal. Most osteotomies only correct varus, but not the pronation of the metatarsal. Persistent postoperative pronation has been shown to increase deformity recurrence and have worse functional outcomes. The proximal rotational metatarsal osteotomy (PROMO) technique reliably corrects pronation and varus through a stable osteotomy, avoiding fusing any healthy joints. The objective of this research is to show a prospective series of the PROMO technique.

Methods

Twenty-five patients (30 feet) were operated with the PROMO technique. The sample included 22 women and 3 men, average age 46 years (range 22-59), for a mean prospective follow-up of 1 year (range 9-14 months). Inclusion criteria included symptomatic hallux valgus deformities, absence of severe joint arthritis, or inflammatory arthropathies, with a metatarsal malrotation of 10 degrees or more, with no tarsometatarsal subluxation or arthritis on the anteroposterior or lateral foot radiograph views. The mean preoperative and postoperative Lower Extremity Functional Scale (LEFS) score, metatarsophalangeal angle, intermetatarsal angle, metatarsal malrotation, complications, satisfaction, and recurrence were recorded.

Results

The mean preoperative and postoperative LEFS scores were 56 and 73. The median pre-/postoperative metatarsophalangeal angle was 32.5/4 degrees and the intermetatarsal angle 15.5/5 degrees. The metatarsal rotation was satisfactorily corrected in 24 of 25 patients. An Akin osteotomy was needed in 27 of 30 feet. All patients were satisfied with the surgery, and no recurrence or complications were found.

Conclusions

PROMO is a reliable technique, with good short-term results in terms of angular correction, satisfaction, and recurrence. Long-term studies are needed to determine if a lower hallux recurrence rate occurs with the correction of metatarsal rotation in comparison with conventional osteotomies.

Level of evidence

IV, prospective case series.

Modified scarf osteotomy for hallux valgus: From a finite element model to clinical results

PURPOSE

Finite element (FE) analysis and clinical follow-up were used to evaluate the efficacy of modified scarf osteotomy for moderate-to-severe hallux valgus (HV).

METHOD

We retrospectively evaluated 42 patients (44 feet) who underwent modified rotational scarf osteotomy for moderate-to-severe HV at our institution between January 2010 and January 2019. Radiological indicators and subjective scores were recorded at different time points. To compare the results and elemental characteristics, a FE model of the metatarsophalangeal (MTP) joint that included anatomically realistic geometrical and structural characteristics was built. The biomechanical features and correction differences in dynamic loads as well as the incidence of troughing were estimated.

RESULTS

Both the hallux valgus angle (HVA) and intermetatarsal angle (IMA) showed significant improvement 6 weeks postoperatively (p < 0.05); additionally, the HVA increased from 6 weeks postoperatively to the last follow-up, while the IMA showed no significant changes (p > 0.05). The subjective scores significantly improved from the preoperative period to the last follow-up. The percentages of troughing and recurrence were remarkably low in our pilot study because of the innate stability of the modified rotated fixation.

CONCLUSION

Our preliminary findings suggest that modified rotational scarf osteotomy offers sufficient stability, correct HV deformity effectively, and good clinical outcomes for moderate to severe HV.

Effect of the Reversed L-Shaped Osteotomy on the Round Sign: Not All Hallux Valgus Deformities May Need Proximal Derotation to Correct the Radiographic Appearance of Metatarsal Pronation

Background

Metatarsal pronation has been claimed to be a risk factor for hallux valgus recurrence. A rounded shape of the lateral aspect of the first metatarsal head has been identified as a sign of persistent metatarsal pronation after hallux valgus correction. This study investigated the derotational effect of a reversed L-shaped (ReveL) osteotomy combined with a lateral release to correct metatarsal pronation. The primary hypothesis was that most cases showing a positive round sign are corrected by rebalancing the metatarsal-sesamoid complex. We further assumed that the inability to correct the round sign might be a risk factor for hallux valgus recurrence.

Methods

We retrospectively evaluated 266 cases treated with a ReveL osteotomy for hallux valgus deformity. The radiologic measurements were performed on weightbearing foot radiographs preoperatively, at an early follow-up (median, 6.2 weeks), and the most recent follow-up (median, 13 months). Univariate and multivariate logistic regression analyses identified risk factors for hallux valgus recurrence (hallux valgus angle [HVA] ≥ 20 degrees).

Results

A preoperative positive radiographic round sign was present in 40.2% of the cases, of which 58.9% turned negative after the ReveL osteotomy (P < .001). Hallux valgus recurred in 8.6%. Risk factors for recurrence were a preoperative HVA >30 degrees (odds ratio [OR] = 5.3, P < .001), metatarsus adductus (OR = 4.0, P = .004), preoperative positive round sign (OR = 3.3, P = .02), postoperative HVA >15 degrees (OR = 74.9; P < .001), and postoperative positive round sign (OR = 5.3, P = .008). Cases with a positive round sign at the most recent follow-up had a significantly higher recurrence rate than those with a negative round sign (22.7% vs 5.9%, P < .001).

Conclusion

The ReveL osteotomy corrected a positive round sign in 58.9%, suggesting that not all hallux valgus deformities may need proximal derotation to negate the radiographic appearance of the round sign. A positive round sign was found to be an independent risk factor for hallux valgus recurrence. Further 3-dimensional analyses are necessary to better understand the effects and limitations of distal translational osteotomies to correct metatarsal pronation.

Level of Evidence

Level IV, case series.

Imaging Findings and First Metatarsal Rotation in Hallux Valgus

BACKGROUND

Failure to identify and correct malrotation of the first metatarsal may lead to recurrent hallux valgus deformity. We aimed to identify the proportion of hallux valgus patients with increased first metatarsal pronation using weightbearing computed tomography (WBCT) and to identify the relationship with conventional radiographic measurements.

METHODS

WBCT scans were analyzed for 102 feet with a hallux valgus angle (HVA) and intermetatarsal angle (IMA) greater than or equal to 16 and 9 degrees, respectively. Metatarsal pronation angle (MPA), alpha angle, sesamoid rotation angle (SRA), and sesamoid position were measured on standardized coronal WBCT slices. Pronation was recorded as positive. Hindfoot alignment angle (HAA) was assessed using dedicated software. Pearson correlation and multiple regression analyses were used to assess differences between groups.

RESULTS

Mean HVA was 29.8±9.4 degrees and mean IMA was 14.1±3.7 degrees. Mean MPA was 11.9±5.8 (range 0-26) degrees and mean alpha angle was 11.9±6.8 (range -3 to 29) degrees. In a previous study, we demonstrated the upper limit of normal MPA as 16 degrees and alpha angle as 18 degrees. Based on these criteria, we identified abnormal metatarsal pronation in 32 feet (31.4%). We found a strong positive correlation between SRA and HVA/IMA (R = 0.67/0.60, respectively, P < .001). IMA and HAA weakly correlated with MPA and alpha angle (IMA: R = 0.26/0.27, respectively, P < .01; HAA: R = 0.26/0.27, respectively, P < .01). Regression analyses suggested that increasing IMA was the most significant radiographic predictor of increased pronation. In this cohort, there was no correlation between HVA or sesamoid position and MPA / alpha angle (HVA: P = .36/.12, respectively, sesamoid position, P = .86/.77, respectively).

CONCLUSION

In this cohort of 102 feet that met plain radiographic criteria for hallux valgus deformity, first metatarsal pronation was found abnormal in 31.4% of patients. We found a weak association between the IMA and hindfoot valgus, but not the HVA.

Radiographic evaluation of congruency of the first metatarsophalangeal joint in hallux valgus

Background

Congruency of the first metatarsophalangeal (MTP) joint is extremely important for the selection of surgical methods and prognosis, while radiographic evaluation methods are relatively lacking. The purpose of this article was to explore radiographic indicators for evaluating congruency of the first MTP joint.

Methods

We selected patients with hallux valgus who had a weightbearing X-ray in the outpatient system and measured their hallux valgus angle (HVA). In total, 183 cases of 245 feet with HVA greater than 15° were selected. The distal metatarsal articular angle (DMAA), metatarsophalangeal joint angle (MTPJA), congruency index (CI) and tibial sesamoid position (TSP) were measured and statistically analysed.

Results

The higher the degree of hallux valgus was, the higher the proportion of incongruency of the first MTP joint. Significant differences were found in the DMAA, MTPJA and CI between the congruency and incongruency groups of patients with moderate-to-severe hallux valgus (P < 0.05). The areas under the curve (AUCs) of the receiver operating characteristic (ROC) curve for DMAA was 0.554 (P > 0.05). However, the MTPJA and CI were 0.906 and 0.884, the sensitivity values reached 0.791 and 0.949, the specificity values were 0.862 and 0.644, and the critical values were 10.67 and 0.765, respectively. The correlation test indicated that in the congruency group, the DMAA and HVA were positively correlated, but the MTPJA, CI and HVA had low correlation coefficients. The DMAA and HVA were not correlated in the incongruency group; however, the MTPJA and HVA were significantly positively correlated, and the CI and HVA showed a negative correlation (P < 0.05).

Conclusion

The MTPJA and CI are indicators that can be used to quantitatively evaluate the congruency of the first MTP joint, taking 10° and 0.765 as the demarcation points, respectively. Clinically, congruency of the MTP joint should be considered when choosing surgical methods for different degrees of hallux valgus, and the MTPJA and CI can be used as quantitative evaluation indicators.

Level of evidence: Level III, Retrospective Comparative Study.

Assessing the Rotation of the First Metatarsal on Computed Tomography Scans: A Systematic Literature Review

BACKGROUND

Hallux valgus is a multiplanar deformity that is often treated on the basis of 2-dimensional (2D) parameters and radiographs. Recurrence rates after surgical correction remain high, and failure to correct pronation of the metatarsal is increasingly stipulated as being part of the problem. Multiple methods of assessing metatarsal pronation have been proposed.

METHODS

We performed a systematic literature review identifying studies that measured metatarsal pronation and torsion on computed tomography (CT) scans. Specific methodology, patient groups, results, and reliability assessments were all reported.

RESULTS

We identified 14 studies that fulfilled the inclusion criteria. Eleven studies measured 2D values on CT scan, and 3 studies used computer-based 3-dimensional (3D) modeling and artificial intelligence systems to help calculate pronation. Metatarsal pronation angle, α angle, sesamoid rotation angle, and measurements for torsion were the most commonly used methods. All angles and measurements were performed as 2D measurements, but the metatarsal pronation angle was also performed with 3D modeling. Reliability and reproducibility of the α angle and metatarsal pronation angle were excellent, despite being performed on studies with small numbers.

CONCLUSION

Multiple methods have been reported to demonstrate first metatarsal pronation on CT, of which the α angle and the metatarsal pronation angle are the most pragmatic and useful in a clinical setting. Further work is needed to further validate the reliability of these measurements in larger series and to identify normal pronation and metatarsal torsion on weightbearing imaging. Further work is required to determine whether addressing pronation reduces recurrence rates and improves outcomes in surgery for hallux valgus.

LEVEL OF EVIDENCE

Level III, retrospective cohort study.

Prevalence and Predisposing Factors for Recurrence after Hallux Valgus Surgery: A Systematic Review and Meta-Analysis

Recurrence is a frequent and undesirable outcome after hallux valgus (HV) surgery. However, the prevalence of HV recurrence and the pre- and postoperatory factors associated with it have not been adequately studied. This study aimed to quantify the prevalence rate of HV recurrence and to analyze its predisposing factors. MEDLINE and EMBASE databases were systematically searched for observational studies including individuals undergoing HV surgical correction. The random-effects restricted maximum likelihood model was used to estimate the pooled effect size (correlation coefficient (r)). Twenty-three studies were included, yielding a total of 2914 individuals. Pooled prevalence of HV recurrence was 24.86% (95% confidence interval (CI), 19.15 to 30.57, I² = 91.92%, p = 0.00). Preoperative HV angle (HVA) (r = 0.29; 95% CI, 0.14 to 0.43) and preoperative intermetatarsal angle (IMA) (r = 0.13; 95% CI, 0.00 to 0.27) showed a moderate positive relationship with recurrence. Postoperative HVA (r = 0.57; 95% CI, 0.21 to 0.94) and sesamoid position (r = 0.46; 95% CI, 0.31 to 0.60) showed strong relationships with recurrence. In conclusion, preoperative HVA, IMA, and postoperative HVA and sesamoid position are significant risk factors for HV recurrence, and the association of these factors with recurrence is affected by age.

Treatment of hallux valgus by Scarf osteotomy - rates and reasons for recurrence and rates of avascular necrosis: A systematic review

BACKGROUND

We reviewed the rates of and reasons for hallux valgus (HV) recurrence and the rates of avascular necrosis following Scarf osteotomy.

METHODS

We searched the Cochrane Library, PubMed, and Embase databases for studies reporting operative management of HV using Scarf osteotomy. The primary endpoints were reasons for and rates of HV recurrence. The secondary endpoint was the rate of avascular necrosis.

RESULTS

We included 15 studies with 946 operations for HV. Seven studies reported no recurrence, six reported recurrence rates of 3.6-11.3%, one reported a recurrence rate of 30%, and one reported a recurrence rate of 78%. Thirteen studies (678 feet) reported other complications from Scarf osteotomy without avascular necrosis.

CONCLUSIONS

Although HV recurrence is not uncommon following Scarf osteotomy, patient-related factors, surgical competence, and longer follow-up are more likely to be associated with recurrence. Avascular necrosis is an infrequent complication in HV patients treated using Scarf osteotomy.

Hallux Varus Correction With Extensor Hallucis Longus Tendon Transfer and Reverse Scarf Osteotomy

INTRODUCTION

Hallux varus is the medial deviation of the hallux. Although rare, it can cause discomfort, functional weakness, difficulty with shoe wear, and dissatisfactory cosmesis. This study reports 3 cases of hallux varus treated using extensor hallucis longus (EHL) tendon transfer with or without the use of reverse scarf osteotomy (RSO).

METHODS

This cases series studies the technique of using EHL tendon transfer and the role for RSO in the surgical correction of hallux varus. Indication for RSO included osseous overcorrection in the index hallux valgus surgery or as an adjunct when EHL tendon transfer alone was unable to restore alignment. Patients were followed-up for 24 months and their postoperative outcomes were recorded.

RESULTS

All patients were female between the ages 55 to 67 years. Radiological parameters after surgery improved in all patients. The mean hallux-valgus angle was corrected from -23.7 ± 3.5° to -3.2 ± 2.0° postoperatively (P < .05). Intermetatarsal angle was increased from 5.0 ± 1.9° to 6.7 ± 1.0° (P = .065). Distal metatarsal articular angle improved from -28.9 ± 7.6° to -7.8 ± 3.7° (P < .05). Mean American Orthopaedic Foot and Ankle Society scores improved from 37 ± 24 to 75 ± 9 (P = .064) at 24 months. In addition, visual analogue scale pain scores reduced from 5 ± 1.5 to 1 ± 1 (P < .05). All patients reported being satisfied with the procedure, and no complications were reported at 24 months after surgery.

CONCLUSION

Hallux varus correction using EHL tendon transfer with or without RSO appears to provide satisfactory results at 24 months.

LEVELS OF EVIDENCE

Level V: Expert opinion, Techniques.

The Endolog technique for moderate to severe hallux valgus treatment: Clinical and radiographic analysis of 194 patients

BACKGROUND

Endolog is an intra-medullary titanium device used for a minimally-invasive hallux valgus correction. The aim of this study was to evaluate clinical and radiographic outcomes of this device.

METHODS

A retrospective study with a prospective data collection was conducted. Patients underwent to Endolog procedures from September 2009 to April 2017 were enrolled. Mild HV deformity (HVA ≤ 19° and IMA ≤ 13°) or associated procedure to Endolog technique were excluded. The radiological (HVA, IMA and PASA) and clinical (AOFAS score) pre and post-operative data were compared through Wilcoxon Signed-Rank test.

RESULTS

194 feet (144 moderate and 50 severe HV) underwent HV correction respecting study's criteria. AOFAS scores significantly improved from 31.0 ± 12.7 points preoperatively to 88.5 ± 8.0 at 24 months. Even all radiographic measurements significantly improved during 2 years' follow-up. Only 6 patients experienced complications: 4 cases of HV recurrence and 2 cases of intolerance device-related pain.

CONCLUSIONS

Endolog technique proved to be a valid option in the moderate-to-severe hallux valgus treatment, comparable to other surgical techniques described in literature.

Does preoperative deformity diminish radiographic outcome after hallux valgus correction with scarf osteotomy?: A retrospective study of 102 cases

BACKGROUND

Scarf osteotomy is a frequently used technique to correct moderate to severe hallux valgus deformities. Recurrence of a deformity is a commonly reported complication after surgery. The aim of our study was to evaluate the impact of preoperative deformity on radiological outcome in terms of postoperative loss of correction after scarf osteotomy.

METHODS

102 patients, in which a hallux valgus deformity was corrected with an isolated scarf osteotomy were included. Weightbearing radiographs were analyzed preoperatively, postoperatively, after 6 weeks and after three months (mean 10.9 months SD 17.2 months). The following radiological parameters were used for analysis: the intermetatarsal angle (IMA), the hallux valgus angle (HVA), the distal metatarsal articular angle (DMAA), position of the sesamoids, first metatarsal length, and first metatarsophalangeal joint congruity.

RESULTS

Significant correction of IMA, HVA, DMAA, sesamoid position and joint congruity was achieved (p < 0.001). The IMA improved from 15.8 ± 2.3 to 4.3 ± 2.8°, the HVA from 32.6 ± 6.8 to 9.1 ± 7.2, and the DMAA from 11.4 ± 6.9 to 8.4 ± 5.2°, respectively. In contrast to DMAA, throughout followup we could detect loss of correction for HVA and for IMA amounting 6.3° ± 5.8 and 3.8° ± 2.8 respectively. Loss of HVA correction revealed a significant correlation with preoperative DMAA, but not with the other preoperative radiological parameters.

CONCLUSIONS

Preoperative deformity does not correlate with postoperative loss of correction after scarf osteotomy, except DMAA.

CLINICAL RELEVANCE

Our results may be helpful in counseling patients regarding recurrence of hallux valgus deformity after scarf osteotomy.

LEVEL OF EVIDENCE

Therapeutic, Level IV, retrospective case series.

Metatarsal Pronation in Hallux Valgus Deformity: A Review

Hallux valgus deformity is a multiplanar deformity, where the rotational component has been recognized over the past 5 to 10 years and given considerable importance. Years ago, a rounded shape of the lateral edge of the first metatarsal head was identified as an important factor to detect after surgery because a less rounded metatarsal head was associated to less recurrence. More recently, pronation of the metatarsal bone was identified as the cause for the rounded appearance of the metatarsal head, and therefore, supination stress was found to be useful to achieve a better correction of the deformity. Using CT scans, up to 87% of hallux valgus cases have been shown to present with a pronated metatarsal bone, which highlights the multiplanar nature of the deformity. This pronation explained the perceived shape of the metatarsal bone and the malposition of the medial sesamoid bone in radiological studies, which has been associated as one of the most important factors for recurrence after treatment. Treatment options are discussed briefly, including metatarsal osteotomies and tarsometatarsal arthrodesis.

Scarf osteotomy for the treatment of moderate to severe hallux valgus: Analysis of predictors for midterm outcomes and recurrence

BACKGROUND

Controversies remain regarding the predictors for outcomes and recurrence after scarf osteotomy for hallux valgus deformity.

METHODS

Sixty-two patients (70 feet) underwent scarf osteotomy for hallux valgus deformity. The radiological angles, tibial sesamoid position, articular congruence, demographics, comorbidities, AOFAS, VAS and SF-12 scores, and the postoperative compliance were tested as predictors for outcomes and recurrence.

RESULTS

After a mean 38±15.4 months follow-up, all of the radiological angles, the total AOFAS, PCS-12 and VAS scores significantly improved (all P<0.001). Preoperative MCS-12 was directly related to the total postoperative AOFAS score (P=0.003). A higher number of cardiovascular risk factors negatively affected the postoperative total AOFAS score, VAS and PCS-12 (β=-3.42, P=0.030; β=0.262, P=0.022; β=-0.181, P=0.025, respectively). The BMI influenced postoperative PCS-12 (β=-0.244, P=0.002). Preoperative HVA was directly related to postoperative DMAA (P=0.002) and tibial sesamoid position (P=0.005). Preoperative joint incongruence and postoperative noncompliance were associated with recurrence (P=0.043 and P=0.035, respectively).

CONCLUSIONS

Satisfactory results can be expected after scarf osteotomy. Higher BMI and number of cardiovascular risk factors, and low mental status should be carefully considered when counselling patients for this procedure. Adherence to postoperative care instructions influences deformity recurrence.

Long-term clinical outcomes of scarf osteotomy in regional hospital Hong Kong

Background:

Lack of local data concerning the long-term clinical outcomes of scarf osteotomy in Hong Kong.

Methods:

This is a retrospective review of 75 patients (88 feet) who underwent scarf osteotomy with a mean follow-up of 94.20 months (60–144 months). Clinical ratings were based on visual analog scale (VAS) and American Orthopaedic Foot & Ankle Society (AOFAS) scale. Weight-bearing radiographs were used to perform angular measurements: (i) hallux valgus angle (HVA), (ii) intermetatarsal angle, (iii) distal metatarsal articular angle, and (iv) tibial sesamoid position before operation and at the time of latest follow-up.

Results:

The mean overall AOFAS scales improved from 29.66 (5–49) points preoperatively to 86.83 (39–100) points at the time of final follow-up. The VAS improved from 6.61 (5 to 9) to 0.66 (0 to 4). The average HVA correction was 25.42 (8–46). The 8- to10-year recurrence rate (HVA > 20) was 31.80%. A higher degree of preoperative HVA predicts higher recurrence rate.

Conclusion:

Scarf osteotomy is an effective procedure for symptom control and improvement in radiological parameters for hallux valgus deformity. However, recurrence rate is relatively high.

Role of Coronal Plane Malalignment in Hallux Valgus Correction

Coronal malalignment is an important deformity parameter in hallux valgus feet. Approximately 90% of patients with hallux valgus have some degree of metatarsal pronation. In operated hallux valgus, persistent metatarsal pronation is an independent deformity relapse factor. Coronal malalignment can be identified through an anteroposterior (AP) weight-bearing foot radiograph and a weight-bearing forefoot scan. The AP foot view can identify 3 levels of rotation: mild, moderate and severe metatarsal pronation. Regarding the treatment options, some techniques are capable of rotational correction, such as the proximal rotational metatarsal osteotomy, Lapidus, dome osteotomy, and proximal oblique sliding closing wedge.

Magnesium-based bioabsorbable screw fixation for hallux valgus surgery - A suitable alternative to metallic implants

BACKGROUND

The primary aim of this pilot study was to prospectively evaluate outcomes of the MgYREZr bioabsorbable screw in the setting of hallux valgus corrective surgery. The secondary aim was to compare the outcomes against a control group treated with conventional titanium screws.

METHODS

A consecutive series of patients with hallux valgus deformity (n=24) underwent forefoot reconstruction surgery with a scarf osteotomy to the first metatarsal using MgYREZr screws. Functional scores, radiological outcomes, and complication profile were recorded over 12 months. Results were compared against a control group of patients (n=69) using titanium alloy screws.

RESULTS

At 1-year post-operative, both functional and radiological outcomes showed significant improvements. Compared to the control group, there was no significant difference in functional outcomes, yet radiological improvements were significantly better in the control group.

CONCLUSIONS

The MgYREZr bioabsorbable screw is a suitable alternative to titanium alloy screws for hallux valgus corrective surgery.

The Use of a Triplanar Metatarsal Rotational Osteotomy to Correct Hallux Valgus Deformities

Proximal rotational metatarsal osteotomy (PROMO) is a technique that allows the surgeon to correct the varus and pronation of the first metatarsal that is observed in most patients with hallux valgus deformity. Persistent metatarsal pronation is a recognized recurrence factor for operatively treated hallux valgus. The indication for this technique is a mild-moderate hallux valgus deformity (i.e., intermetatarsal angle <18° and hallux valgus angle <40°) in which pronation is present. (Note that according to the literature, 10% to 20% of patients do not have pronation.) The PROMO is performed via a single proximal oblique metatarsal incision. Following completion of the osteotomy, the distal metatarsal segment is supinated (external rotation), correcting pronation and varus deviation, which is achieved as a result of the oblique nature of the osteotomy (i.e., rotation through an oblique plane). Step 1: Preoperative planning: measure the intermetatarsal angle and the metatarsal rotation. For the latter, use the published classification (mild, moderate, severe). With both values, use the table included in the PROMO tray to know which osteotomy angulation should be used. Step 2: medial foot incision. Step 3: drive the guidewire 1 cm distal to the tarsometatarsal joint. Step 4: Under fluoroscopy, ensure that the wire is parallel to the sole of the foot and perpendicular to the metatarsal. Step 5: use the positioning jig to drive a Kirschner wire with the chosen pronation correction. Step 6: slide the osteotomy jig with the previously chosen osteotomy angulation. Step 7: perform the osteotomy. Step 8: use the rotation jig with the desired pronation correction. Step 9: derotate and correct the metatarsal deformity, leaving both wires parallel to each other. Step 10: perform osteotomy transient fixation with 2 Kirschner wires. Step 11: apply a medial locking plate and an interfragmentary screw at the osteotomy site. The expected outcome is complete correction of the first metatarsal varus and pronation.

Effect of Akin Osteotomy on Hallux Valgus Correction After Scarf Osteotomy With Hallux Valgus Interphalangeus

BACKGROUND

Recurrence after hallux valgus correction is a relatively frequent occurrence. Little is known about the importance of initial correction on radiologic outcome. The objective of our study was to determine postoperative radiologic parameters correlating with loss of correction after scarf osteotomy and the combined scarf/akin osteotomy, respectively.

METHODS

Loss of correction was evaluated based on a group of 53 feet with isolated scarf osteotomy (S group) and a group of 17 feet with combined scarf and akin osteotomy (SA group) in a retrospective analysis. The intermetatarsal angle (IMA), the hallux valgus angle (HVA), the distal metatarsal articular angle (DMAA), the proximal to distal phalangeal articular angle (PDPAA), the position of the sesamoids, and joint congruity were measured in weight-bearing radiographs preoperatively and postoperatively throughout a mean follow-up of 44.8 ± 23.6 months.

RESULTS

Loss of correction was comparable between the S and the SA group (P > .05). In contrast, we found higher loss of HVA correction in the S subgroup with a preoperative PDPAA above 8 degrees (P = .011), whereas loss of correction in the S subgroup below 8 degrees of PDPAA was comparable to the SA group. In the S group, loss of correction showed significant correlation with postoperative IMA (P = .015) and PDPAA (P = .008), whereas in the SA group a correlation could be detected for IMA only (P = .045).

CONCLUSION

In cases with a PDPAA above 8 degrees, we recommend a combined scarf/akin osteotomy to diminish the potential for loss of correction.

LEVEL OF EVIDENCE

Level III, therapeutic, retrospective comparative series.

Outcomes after scarf osteotomy with and without Akin osteotomy a retrospective comparative study

BACKGROUND

The scarf osteotomy is a well-established surgical method for correcting a hallux valgus deformity. It is often combined with an Akin osteotomy. However, clear guidelines defining indication criteria are missing. The purpose of this study was to analyze the radiological outcome after scarf osteotomy in dependence of additional Akin osteotomy.

METHODS

This study included 184 patients in whom a hallux valgus deformity was corrected with a scarf osteotomy (group S), and 63 patients in whom an additional Akin osteotomy was performed (group SA). Weight-bearing radiographs were evaluated preoperatively, postoperatively, after 6 weeks, after 3 months and at a follow-up with a mean of 45.4 months. Analysis was made for the following radiological parameters: the intermetatarsal angle (IMA), the hallux valgus angle (HVA), the distal metatarsal articular angle (DMAA), the proximal to distal phalangeal articular angle (PDPAA), and the position of the sesamoids as well as the joint congruity.

RESULTS

Radiographic recurrence (HVA > 20°) was detected in 1 patient (1.6% of recurrence) in the SA group, and in 27 patients in the S group (14.7% of recurrence) at follow-up. Outcome between the two groups differed significantly showing reduced loss of HVA correction in the SA group (p < 0.001). The subgroup with a preoperative PDPAA above eight degrees showed significant inferiority of outcome for the S group compared to the SA group.

CONCLUSION

Radiological outcome after scarf osteotomy is superior with concomitant Akin osteotomy. A preoperative PDPAA above eight degrees makes additional Akin osteotomy recommendable.

LEVEL OF EVIDENCE

Therapeutic, Level III, retrospective comparative series.

Is generalized ligamentous laxity a prognostic factor for recurred hallux valgus deformity?

BACKGROUND

This study was performed to evaluate the intermediate-term clinical outcomes after proximal chevron osteotomy for hallux valgus in patients with generalized ligamentous laxity, and to determine the effect on postoperative recurrence of deformity.

METHODS

There were 23 cases in laxity group (Beighton score ≥5 points) and 175 in non-laxity group with a mean followup of 46.3 months. Clinical evaluation consisted of the AOFAS score, Foot and Ankle Ability Measure (FAAM), and radiographic measurement of hallux alignment. Risk factors associated with postoperative recurrence were evaluated using univariate analysis.

RESULTS

Recurrence rates were 21.7% in the laxity group and 17.1% in non-laxity group (P=.218). There were no significant differences in clinical and radiographic measurements at final followup between the 2 groups. Preoperative HVA and IMA were found to be predictive factors of recurrence (OR=6.3, 4.2; P=.001, .018, respectively).

CONCLUSION

There were no statistical differences in the clinical and radiographic outcomes between hallux valgus with and without generalized ligamentous laxity. Generalized ligamentous laxity demonstrated no definitive effects on postoperative recurrence of hallux valgus deformity.

A Comparative Study of Mini-Scarf Versus Standard Scarf Osteotomy for Hallux Valgus Correction

Scarf osteotomy is widely used for hallux valgus treatment. More recently, a trend has begun toward the use of minimally invasive techniques, including the mini-scarf osteotomy, in which the diaphyseal cut is shortened. We compared the mini-scarf and traditional scarf osteotomy to determine whether the mini-scarf osteotomy is as effective as the scarf osteotomy in correcting mild to moderate hallux valgus and improving clinical function. We reviewed the cases of 37 consecutive patients during a 2-year period. A total of 21 (56.8%) patients had undergone scarf osteotomy and 16 (43.2%) had undergone mini-scarf osteotomy. The intermetatarsal, hallux valgus, and distal metatarsal articular angles and medial sesamoid position of the 2 groups were measured at 12 weeks postoperatively. The Manchester Oxford Foot Questionnaire scores and patient satisfaction were recorded at 28 months postoperatively. All radiologic parameters and Manchester Oxford Foot Questionnaire scores had significantly improved in both groups (p < .05 and p < .01 for mini-scarf and scarf, respectively). The medial sesamoid position had improved in all patients, with similar satisfaction between the 2 procedures (p = .43). The results of the present study have shown that the mini-scarf osteotomy for mild to moderate hallux valgus is as effective as the standard approach, with the potential benefit of a smaller scar and less soft tissue disruption.

Factors Associated With Early Loss of Hallux Valgus Correction

Recurrence is common after hallux valgus corrective surgery. Although many investigators have studied the risk factors associated with a suboptimal hallux position at the end of long-term follow-up, few have evaluated the factors associated with actual early loss of correction. We conducted a retrospective cohort study to identify the predictors of lateral deviation of the hallux during the postoperative period. We evaluated the demographic data, preoperative severity of the hallux valgus, other angular measurements characterizing underlying deformities, amount of hallux valgus correction, and postoperative alignment of the corrected hallux valgus for associations with recurrence. After adjusting for the covariates, the only factor associated with recurrence was the postoperative tibial sesamoid position. The recurrence rate was ~50% and ~60% when the postoperative tibial sesamoid position was >4 and >5 on the 7-point scale, respectively.

Comparison of screw versus locked plate fixation for Scarf osteotomy treatment of hallux valgus

INTRODUCTION

The Scarf osteotomy is a commonly used surgical procedure for treating hallux valgus in Europe. Screw fixation is standard practice, although some surgeons now go without internal fixation. Plate fixation is still being studied. The aim of this study was to compare the radiological outcomes of these fixation methods, which has not been performed up to now.

HYPOTHESIS

Relative to screw fixation, plate fixation of a Scarf osteotomy of the first metatarsal (M1) prevents secondary impaction, without increasing the complication rate or recurrence rate.

MATERIALS AND METHODS

A retrospective study was performed of two internal fixation methods for Scarf osteotomy (screw vs. plate), by analyzing the secondary impaction of the first metatarsal, recurrence of the hallux valgus (angle M1P1>20) on X-rays, incidence of complications and potential discomfort related to the hardware. The osteotomy procedure was the same in both groups: 50patients were included consecutively in each fixation group between February 2014 and November 2015.

RESULTS

The mean follow-up was 13.0±2.7months in the screw group and 12.3±1.1 months in the plate group. There were no severe complications, although four cases of delayed wound healing occurred (3in plate group, 1in screw group). In the screw group, there was one case of secondary impaction, two cases of recurrence (4%) and one case of discomfort. In the plate group, there were no cases of impaction, three recurrences (6%) and five cases of discomfort, leading to plate removal in three of these cases.

DISCUSSION

There was no significant difference between groups in the M1 secondary impaction rate or recurrence rate: screw fixation did not lead to a higher recurrence rate. Systematic fixation with a locked plate for Scarf osteotomy had no advantages over screw fixation in our study.

LEVEL OF EVIDENCE

II, Comparative study with continuous cohorts.

Proximal Rotational Metatarsal Osteotomy for Hallux Valgus (PROMO)

Background:

Hallux valgus deformity consists of a lateral deviation of the great toe, metatarsus varus, and pronation of the first metatarsal. Most osteotomies only correct varus, but not the pronation of the metatarsal. Persistent postoperative pronation has been shown to increase deformity recurrence and have worse functional outcomes. The proximal rotational metatarsal osteotomy (PROMO) technique reliably corrects pronation and varus through a stable osteotomy, avoiding fusing any healthy joints. The objective of this research is to show a prospective series of the PROMO technique.

Methods:

Twenty-five patients (30 feet) were operated with the PROMO technique. The sample included 22 women and 3 men, average age 46 years (range 22-59), for a mean prospective follow-up of 1 year (range 9-14 months). Inclusion criteria included symptomatic hallux valgus deformities, absence of severe joint arthritis, or inflammatory arthropathies, with a metatarsal malrotation of 10 degrees or more, with no tarsometatarsal subluxation or arthritis on the anteroposterior or lateral foot radiograph views. The mean preoperative and postoperative Lower Extremity Functional Scale (LEFS) score, metatarsophalangeal angle, intermetatarsal angle, metatarsal malrotation, complications, satisfaction, and recurrence were recorded.

Results:

The mean preoperative and postoperative LEFS scores were 56 and 73. The median pre-/postoperative metatarsophalangeal angle was 32.5/4 degrees and the intermetatarsal angle 15.5/5 degrees. The metatarsal rotation was satisfactorily corrected in 24 of 25 patients. An Akin osteotomy was needed in 27 of 30 feet. All patients were satisfied with the surgery, and no recurrence or complications were found.

Conclusions:

PROMO is a reliable technique, with good short-term results in terms of angular correction, satisfaction, and recurrence. Long-term studies are needed to determine if a lower hallux recurrence rate occurs with the correction of metatarsal rotation in comparison with conventional osteotomies.

Level of evidence:

IV, prospective case series.

A randomized comparison of the proximal crescentic osteotomy and rotational scarf osteotomy in the treatment of hallux valgus

Objectives

The aim of this study was to compare clinical and radiological results of proximal crescentic osteotomy (PCO) and rotational scarf osteotomy performed in the treatment of hallux valgus.

Methods

A total of 57 consecutive patients (60 feet) with symptomatic hallux valgus deformity were randomly assigned to one of two groups. The PCO group consisted of 22 women and 5 men (30 feet) and the mean age was 43(±14.5) years. The scarf group consisted of 23 women and 7 men (30 feet) and the mean age was 40.9(±12.6) years. Outcomes were assessed by using of preoperative and postoperative American Orthopaedic Foot and Ankle Society (AOFAS) scores and visual analogue scale (VAS). Weight bearing X-rays were used for radiological evaluation.

Results

The mean AOFAS scores improved from 42(±16.2) to 66.7(±13.4) points in PCO group and from 36.2(±16.1) to 73.2(±13.5) points in scarf group. The mean pain score improved from 6.3(±1.3) to 2.4(±2) in PCO group and from 6.5(±1.9) to 2.5(±1.3) in scarf group. The mean hallux valgus angle (HVA) decreased from 38.1°(±7.1) preoperatively to 23.8°(±8.5) at postoperative first year in PCO group, and from 36.1°(±7.5) preoperatively to 22.2°(±7.5) at postoperative first year in scarf group. The mean intermetatarsal angle (IMA) decreased from 17.3°(±3.8) preoperatively to 11.8°(±3.3) at postoperative first year in PCO group, and from 16.2°(±2.6) preoperatively to 9.3°(±2.4) at postoperative first year in scarf group.

When all the patients were assessed together, the relations between preoperative DMAA values and postoperative first year HVA (r = 0,327) and IMA (r = 0,399) values were positive but had low significance. The HVA and IMA values were increased in both groups at the end of the first year when compared to the postoperative sixth week values (p < 0.01 for both groups for both values).

Conclusion

The PCO and the rotational scarf osteotomy in the treatment of hallux valgus deformity provides a satisfactory correction. The clinical and radiological results of both methods are similar. Especially in patients with high preoperative DMAA, an increase in the HVA and the IMA values may occur in the first postoperative year when compared to the postoperative sixth week values.

Level of evidence

Level II, therapeutic study.

Is the Rotational Deformity Important in Our Decision-Making Process for Correction of Hallux Valgus Deformity?

Rotational deformity in hallux valgus is a recognized component and a demonstrated recurrence factor in patients who have undergone surgery. More than 20 years ago, publications started reporting metatarsal pronation as part of the hallux valgus pathology. Identifying metatarsal pronation should be part of the preoperative angular measurements. The proximal metatarsal rotational osteotomy and Lapidus fusion are some of the few techniques that reliably correct metatarsal pronation. They have good results, with more nonunions reported for the Lapidus. The authors present their hallux valgus treatment algorithm that includes metatarsus varus severity, tarsometatarsal instability, and rotational deformity among its variables.

Percutaneous Hallux Valgus Surgery Without Distal Metatarsal Articular Angle Correction

BACKGROUND

Many factors are considered predictors of recurrence after hallux valgus (HV) surgery, including preoperative distal metatarsal articular angle (DMAA). The restoration of the bone and joint alignment would be more important than realigning the cartilaginous surface of the metatarsal head. Therefore, is DMAA correction essential for a good clinical and radiological results after HV surgery? This study aims to illustrate the results of percutaneous forefoot surgery (PFS) for correction of HV deformity without DMAA correction.

MATERIAL AND METHODS

A prospective single-center study of 74 patients (89 feet), with mild-to-moderate hallux valgus deformity, who underwent PFS. The mean latest follow-up was 57.3 months.

RESULTS

Preoperative median visual analog scale was 7 points and AOFAS scores were 52 points. At the mean latest follow up both scores improved to 0 points and 90 points, respectively. Median HV angle and intermetatarsal angle changed from 30° and 12° preoperatively, to 21° and 11° at mean latest follow-up. Overall, 80% of the patients were satisfied or very satisfied. Recurrence of medial first metatarsal head pain occurred in 12 cases (13.5%).

CONCLUSIONS

PFS, without DMAA correction, is a valid procedure for surgical correction in patients with HV, despite the slightly worse radiographic results in our study.

LEVELS OF EVIDENCE

Level II: Prospective study.

Percutaneous forefoot surgery for treatment of hallux valgus deformity: an intermediate prospective study

BACKGROUND

This study aims to illustrate the results of percutaneous forefoot surgery (PFS) for correction of hallux valgus.

MATERIALS AND METHODS

A prospective study of 108 patients, with hallux valgus deformity, who underwent PFS was conducted. The minimum clinical and radiological follow-up was two years (mean 57.3 months, range 22-112).

RESULTS

Preoperative mean visual analog scale was 6.3 ± 1.5 points, and AOFAS scores were 50.6 ± 11 points. At the last follow-up, both scores improved to 1.9 ± 2.4 points and 85.9 ± 1.83 points, respectively. Mean hallux valgus angle changed from 34.3° ± 9.3° preoperatively to 22.5° ± 11.1° at follow-up. At follow-up, 76.5% of the subjects were satisfied or very satisfied. Recurrence of medial 1st MT head pain happened in 22 cases (16.7%).

CONCLUSIONS

PFS, in our study, does not improve the radiological and patient satisfaction rate results compared with conventional procedures. The main advantage is a low postoperative pain level, but with an insufficient HVA correction.

LEVEL OF EVIDENCE

II, prospective study.

Footwear modification following hallux valgus surgery: The all-or-none phenomenon

AIM: To define footwear outcomes following hallux valgus surgery, focusing on patient return to comfortable and heeled footwear and patterns of post-operative footwear selection.

METHODS: Surgical intervention is indicated for symptomatic cases of hallux valgus unresponsive to conservative methods, with favourable reported outcomes. The return to various types of footwear post-operatively is reflective of the degree of correction achieved, and corresponds to patient satisfaction. Patients are expected to return to comfortable footwear post-operatively without significant residual symptoms. Many female patients will additionally attempt to return to high-heeled, narrow toe box shoes. However, minimal evidence exists to guide their expectations. Sixty-five female hallux valgus patients that had undergone primary surgery between 2011 and 2013 were retrospectively identified using our hospital surgical database. Patients were reviewed using a footwear-specific outcome questionnaire at a mean 18.5 mo follow-up.

RESULTS: Eighty-six percent of patients were able to return to comfortable footwear post-operatively with minimal discomfort. Of those intending to resume wearing heeled footwear, 62% were able to do so, with 77% of these patients wearing these as or more frequently than pre-operatively. No significant difference was observed between pre- and post-operative heel size. Mean time to return to heeled footwear was 21.4 wk post-operation. Cosmetic outcomes were very high and did not adversely impact footwear selection.

CONCLUSION: We report high rates of return to both comfortable and heeled shoes in female patients following primary hallux valgus surgery. We observed an “all-or-none phenomenon” where patients rejected a return to heeled footwear unless able to tolerate them at the same frequency and heel size as pre-operatively. A minority of patients were unable to return to comfortable footwear post-operatively, which had adverse ramifications on their quality-of-life. We recommend that the importance of managing patient expectations through appropriate pre-operative counselling be emphasized in forefoot surgery.

Surgery for the correction of hallux valgus

This study sought to determine the medium-term patient-reported and radiographic outcomes in patients undergoing surgery for hallux valgus. A total of 118 patients (162 feet) underwent surgery for hallux valgus between January 2008 and June 2009. The Manchester-Oxford Foot Questionnaire (MOXFQ), a validated tool for the assessment of outcome after surgery for hallux valgus, was used and patient satisfaction was sought. The medical records and radiographs were reviewed retrospectively. At a mean of 5.2 years (4.7 to 6.0) post-operatively, the median combined MOXFQ score was 7.8 (IQR:0 to 32.8). The median domain scores for pain, walking/standing, and social interaction were 10 (IQR: 0 to 45), 0 (IQR: 0 to 32.1) and 6.3 (IQR: 0 to 25) respectively. A total of 119 procedures (73.9%, in 90 patients) were reported as satisfactory but only 53 feet (32.7%, in 43 patients) were completely asymptomatic. The mean (SD) correction of hallux valgus, intermetatarsal, and distal metatarsal articular angles was 18.5° (8.8°), 5.7° (3.3°), and 16.6° (8.8°), respectively. Multivariable regression analysis identified that an American Association of Anesthesiologists grade of > 1 (Incident Rate Ratio (IRR) = 1.67, p-value = 0.011) and recurrent deformity (IRR = 1.77, p-value = 0.003) were associated with significantly worse MOXFQ scores. No correlation was found between the severity of deformity, the type, or degree of surgical correction and the outcome. When using a validated outcome score for the assessment of outcome after surgery for hallux valgus, the long-term results are worse than expected when compared with the short- and mid-term outcomes, with 25.9% of patients dissatisfied at a mean follow-up of 5.2 years.

Cite this article: Bone Joint J 2015;97-B:208–14.

Osteodesis for hallux valgus correction: is it effective?

BACKGROUND

Although the etiology of hallux valgus is contested, in some patients it may be failure of the stabilizing soft tissue structures around the first ray of the foot. Because there is lack of effective soft tissue techniques, osteotomies have become the mainstream surgical approach to compensate for the underlying soft tissue deficiency; osteodesis, a soft tissue nonosteotomy technique, may be a third alternative, but its efficacy is unknown.

QUESTIONS/PURPOSES

We asked: (1) Can an osteodesis, a distal soft tissue technique, correct hallux valgus satisfactorily in terms of deformity correction and improvement in American Orthopaedic Foot and Ankle Society (AOFAS) score? (2) Is the effectiveness of an osteodesis affected by the patient's age or deformity severity? (3) What complications are associated with this procedure?

METHODS

Between February and October 2010, we performed 126 operations to correct hallux valgus, of which 126 (100%) were osteodeses. Sixty-one patients (110 procedures) (87% of the total number of hallux valgus procedures) were available for followup at a minimum of 12 months (mean, 23 months; range, 12-38 months). This group formed our study cohort. During the study period, the general indications for this approach included failed conservative measures for pain relief and metatarsophalangeal angle greater than 20° or intermetatarsal angle greater than 9°. Intermetatarsal cerclage sutures were used to realign the first metatarsal and postoperative fibrosis was induced surgically between the first and second metatarsals to maintain its alignment. The radiologic first intermetatarsal angle, metatarsophalangeal angle, and medial sesamoid position were measured by Hardy and Clapham's methods for deformity and correction evaluation. Clinical results were assessed by the AOFAS score.

RESULTS

The intermetatarsal angle was improved from a preoperative mean of 14° to 7° (p<0.001; Cohen's d=1.8) at followup, the metatarsophalangeal angle from 31° to 18° (p<0.001; Cohen's d=3.1), the medial sesamoid position from position 6 to 3 (p<0.001; Cohen's d=2.4), and AOFAS hallux score from 68 to 96 points (p<0.001). Neither patient age nor deformity severity affected the effectiveness of the osteodesis in correcting all three radiologic parameters; however, the deformities treated in this series generally were mild to moderate (mean intermetatarsal angle, 14°; range, 9°-22°). There were six stress fractures of the second metatarsal (5%), five temporary metatarsophalangeal joint medial subluxations all resolved in one month by the taping-reduction method without surgery, and six metatarsophalangeal joints with reduced dorsiflexion less than 60°.

CONCLUSIONS

The osteodesis is a soft tissue nonosteotomy technique, and provided adequate deformity correction and improvement in AOFAS scores for patients with mild to moderate hallux valgus deformities, although a small number of the patients had postoperative stress fractures of the second ray develop. Future prospective studies should compare this technique with osteotomy techniques in terms of effectiveness of the correction, restoration of hallux function, complications, and long-term recurrence.

LEVEL OF EVIDENCE

Level IV, therapeutic study. See the Instructions for Authors for a complete description of levels of evidence.

Preoperative radiological factors correlated to long-term recurrence of hallux valgus following distal chevron osteotomy

BACKGROUND

The purpose of this article was to analyze the long-term radiologic results after distal chevron osteotomy for hallux valgus treatment and to determine the preoperative radiographic factors correlating with radiological recurrence of the deformity.

METHODS

The study included 100 consecutive patients who received distal chevron osteotomy for hallux valgus. The osteotomy included fixation with an absorbable pin in 50 cases, and no fixation in the other 50. For 6 weeks postoperatively, half of each group used a soft cast and half had a traditional elastic bandage. Weight-bearing radiographs were evaluated at 6 weeks, 6 months, 1 year, and a mean of 7.9 (range, 5.8-9.4) years postoperatively.

RESULTS

At the final follow-up, radiological recurrence of hallux valgus deformity (HVA > 15 degrees) was observed in 56 feet (73%). Eleven feet (14%) had mild recurrence (HVA < 20 degrees), 44 (57%) moderate (20 degrees ≥ HVA < 40 degrees), and 1 (1%) severe (HVA ≥ 40 degrees). All recurrences were painless, and thus no revision surgery was required. Long-term hallux valgus recurrence was significantly affected by preoperative congruence, DMAA, sesamoid position, HVA, and I/II IMA.

CONCLUSIONS

Radiological recurrence of hallux valgus deformity of 15 degrees or more was very common at long-term follow-up after distal chevron osteotomy. Preoperative congruence, DMAA, sesamoid position (LaPorta), HVA, and I/II IMA significantly affected recurrence.

LEVEL OF EVIDENCE

Level III, comparative case series.