Chevron Group Research Articles

Comparison of Mean Surgically Induced Astigmatism in Manual Small Incision Cataract Surgery Using Frown Vs Chevron Incision

Purpose: To compare the mean surgically induced Astigmatism(SIA) in Manual Small Incision Cataract Surgery (MSICS) using frown (inverted U) versus inverted V (chevron) incision. Study Design: Quasi experimental study. Place and Duration of Study: Hayatabad Medical Complex from 27th July 2018 to 27th January 2019. Methods: This study included 148 patients who were distributed into the Frown group (F) and Chevron group (C) by convenient sampling. Each group had 74 patients through block operative randomization. To eliminate bias, all the surgeries were performed by one surgeon having more than 5 years’ experience of MSICS. Pre-operative and Post operative keratometric readings were taken. SIA calculator was utilized, and data was analyzed through SPSS 26. Means and standard deviation for continuous variables like age and surgically induced astigmatism were calculated. Results: In Group F, mean surgically induced astigmatism was 1.14±0.65D and in Group C it was 0.87±0.55D. The independent T test revealed that the mean SIA was significantly lower in the Chevron group compared to the Frown group.The post operative visual acuities showed that the proportion of patients with postoperative 6/6 vision in the Chevron group was more as compared to group F. Conclusion: Chevron (inverted V) incision induces less postoperative mean surgically induced astigmatism than Frown (inverted U) incision in Manual Small Incision Cataract Surgery. These findings may have implications for cataract surgery techniques and may help in reducing postoperative astigmatism.

Radiographic Outcomes of Hallux Valgus Deformity Correction With Chevron and Scarf Osteotomies

There is no gold standard in the treatment of hallux valgus deformity. The purpose of our study was to compare various aspects of radiographic assessment following scarf and chevron osteotomies and try to determine which technique helps achieve a more pronounced intermetatarsal angle (IMA) and hallux valgus angle (HVA) correction and produces lower rates of complications, including adjacent-joint arthritis. This study included patients who underwent hallux valgus correction with the scarf (n=32) or chevron (n=181) method with a follow-up period of over 3 years. We evaluated the following parameters: HVA, IMA, duration of hospital stay, complications, development of adjacent-joint arthritis. The scarf technique helped achieve a mean HVA and IMA correction of 18.3° and 3.6°, respectively, and the chevron technique helped achieve a mean correction of 13.1° and 3.7°, respectively. The achieved deformity correction in terms of both the HVA and IMA was statistically significant in both patient groups. The loss of correction assessed with the HVA was statistically significant only in the chevron group. Neither group showed a statistically significant loss of IMA correction. The duration of hospital stay, reoperation rates, and fixation instability rates were comparable in the 2 groups. Neither of the evaluated methods caused a significant increase in total arthritis scores in the evaluated joints. Our study showed good outcomes of hallux valgus deformity correction in both evaluated groups; however, scarf osteotomy yielded somewhat better radiographic outcomes in HVA correction and no loss of HVA correction at 3.5 years of follow-up.

Olecranon Osteotomy by a Gigli Saw versus Chevron's Osteotomy for Exposure of Intra-articular Distal Humerus: A Comparative Study.

Olecranon osteotomy is employed for the fixation of intraarticular distal humeral fractures. We conducted a prospective, randomised study comparing Chevron's osteotomy with olecranon osteotomy by a Gigli saw for exposure of the intraarticular distal humerus in terms of functional outcome and intra-operative ease of the surgery. Thirty patients with skeletally mature AO/OTA type 13- B and 13-C distal humerus fractures were randomly allocated to Chevron's or Gigli saw groups. Each group consisted of a total of 15 patients. Both the groups were assessed on post-operative parameters including arm, shoulder or hand pain, ability to perform certain routine activities, tingling sensations and pain while sleeping. In the Gigli saw group, 12 patients had no gross limitation of activity and 13 were able to perform moderate activities with ease. Similar results were observed in the Chevron's group. The mean difference between the two groups in Oxford Score was 0.60, within the 95% confidence interval and in line with QuickDASH-11 Score. Chevron's technique offers stability and better healing, providing a larger surface area for bone union. However, it is challenging and time-consuming. Also, literature suggests that the Gigli saw has multiple benefits, saves time and effort, and heals by switching blood supply from centrifugal to centripetal post-operatively. Our study suggests that both Chevron's technique and the use of the Gigli saw are effective in distal humeral intra-articular fractures as assessed by multiple parameters. Hence both techniques can be equally used depending on the surgeon's preference.

Actual tendencies of Hallux Valgus surgical treatment.

The purpose of this study is to evaluate which of the methods selected in patients with moderate or severe hallux valgus a result in a better correction of hallux valgus angle (HVA) and intermetatarsal angle (IMA) in Scarf osteotomy as compared to Chevron osteotomy.
 Material and methods; In our study, we selected 36 patients, 16 scarf and 20 chevron osteotomies, with all surgical options from skin incision, capsular and bunionectomy to bone reorientation. Deformities of patients were classified as mild, moderate and severe according to clinical and radiological findings. The results were measured using radiographic HVA, IMA and distal metatarsal articular angle (DMAA).
 Results: No statistical differences were found in HVA, IMA and DMAA between scarf and chevron osteotomy in mild to moderate hallux valgus. In severe hallux valgus, Scarf osteotomy corrected HVA better than Chevron, although this group consisted of twelve patients. Two patients in the Chevron group and three in the Scarf group developed subluxation of the metatarsophalangeal joint.
 Conclusion: In patients with moderate and severe hallux valgus the results of Scarf and Chevron osteotomy have no specific difference. Change to IMA angle with the subluxation of the first metatarsophalangeal joint some months after operation were the main cause for insufficient correction. We favor the Scarf osteotomy because it is more profitable, with correction of HVA and IMA.

Comparison of outcomes of different osteotomy sites for hallux valgus: A systematic review and meta-analysis.

Hallux valgus (HV) is a common foot deformity for which several corrective surgical procedures, with different osteotomy sites, have been reported. The purpose of the present study was to systematically review randomized (RCTs) or controlled (CCTs) clinical trials and perform meta-analysis on outcomes of different osteotomy sites of the first metatarsal. An extensive literature search was conducted in PubMed and the Cochrane Library from January 1983 to July 2020. Studies were identified using the terms "hallux valgus" and "osteotomy". We included RCTs or CCTs comparing different locations of osteotomy for the first metatarsal bone (distal vs. mid-shaft, distal vs. proximal, and mid-shaft vs. proximal). The surgical outcomes included postoperative hallux valgus angle (HVA), intermetatarsal angle (IMA), American Orthopaedic Foot and Ankle Society (AOFAS) score, pain visual analog scale (VAS) score, perioperative complications and recurrence of deformity. We enrolled 10 studies with a total of 793 feet in the qualitative synthesis following full-text screening. A majority of patients included in the enrolled trials showed mild to moderate deformity, with mean HVA <40°. Out of the 10 enrolled studies; six compared distal osteotomies with mid-shaft osteotomies and showed no significant differences in the surgical outcomes between the scarf and chevron groups; three RCTs compared distal osteotomies with proximal osteotomies with conflicting results, one RCT showed the superiority of proximal osteotomy while the other two RCTs showed equivalent outcomes; one study that compared between mid-shaft and proximal osteotomies showed equivalent outcomes between the groups. For the management of mild to moderate HV deformity, we found no significant clinical and radiological differences between patients treated with scarf and chevron osteotomies. Further controlled trials comparing different sites of osteotomies for moderate to severe HV deformity are needed.

Astigmatic Changes in Sutureless Small Incision Cataract Surgery

Introduction: Cataract is the main cause of bilateral blindness in Nepal. Surgery is the accepted treatment option for cataract with Small incision Cataract Surgery (SICS) and Phacoemusification being the common procedures being performed with comparable results. Corneal astigmatism has been a byproduct of cataract surgery since the first limbal incision was made with improved techniques. Self-sealing scleral pocket incisions are stable and provides early healing, faster visual restoration and more importantly superior astigmatism control. A variety of scleral incisions are being used in manual SICS, with the aim of keeping the post-operative astigmatism to a minimum. Despite having many techniques of scleral incision, there have been only few studies which compares surgical induced astigmatism (SIA) between them&#x0D; Objective: To determine surgical induced astigmatism following frown, chevron and straight incision forms in suture-less small incision cataract surgery(SICS).&#x0D; Methodology: A prospective study was done on a total of 120 patients aged 40years and above with senile cataract. The patients were randomly divided into three groups where each group received specific incision- Straight, Frown and Chevron. SICS with intraocular lens (IOL) implantation was performed. The patients were compared on 2 weeks and 6 weeks post operatively for uncorrected visual acuity (UCVA), best corrected visual acuity (BCVA) and keratometric reading. Surgical induced astigmatism (SIA) was calculated using the SIA calculator version 2.0. The study was analysed using SPSS version 20.0.&#x0D; Results: At 6 weeks UCVA of 6/18-6/6 was attained by 63.41%, 78.94% and 84.61% of patients in group straight, frown and chevron. However about 97% of patients attained BCVA of 6/18-6/6 in all three groups. Mean SIA was least in Chevron group (0.30 D ± 0.16) and was most in the straight group (1.22 D ±0.36) which was statistically significant.&#x0D; Conclusion: Chevron incision induces the least astigmatism compared to frown and straight incision.

Transverse olecranon osteotomy with Gigli saw: A fast and reliable technique

Objective. Distal humerus fractures constitute of approximately 2% of all fractures and 30% of elbow fractures. Olecranon osteotomy provides excellent exposure of distal humerus and articular surface. In this study, we aimed to compare transverse osteotomy with gigli saw and classical chevron osteotomy techniques in terms of osteotomy duration and clinical results. Materials and Methods. 40 elbows of 40 patients with Type B intraarticular distal humerus fractures according to AO classification were included in our study. Patients were divided into 2 groups as transverse or chevron osteotomy groups. Patients were evaluated in terms of intraoperative osteotomy time, postoperative time to union, range of motion in the elbow joint and Quick Dash scores at 6th, 12th and 24th months. Results. The mean age of the patients was 45.6 years (19-62). 40% of the patients (8 patients) in the Chevron group had more than 2 mm stepping at articular surface, while this rate was 10% (2 patients) in the gigli saw group. Union was obtained in all patients for both techniques. There was no significant difference between the mean QuickDASH scores and range of motion of the elbow joints except flexion in both groups. Range of motion of flexion was statistically better in the gigli saw group (p&lt;0.05). Conclusions. Transverse osteotomy technique significantly reduces osteotomy and fixation time and will not cause problems in fracture union. It may be preferred because it is simpler and faster to apply than chevron osteotomy and because intra-articular stepping is less common.

Effect of Proximal Dome and Distal Chevron Osteotomies on Plantar Pressures and Radiographic and Functional Outcomes in Hallux Valgus Surgery: A Retrospective Analysis.

No detailed comparative studies have been performed regarding plantar pressure changes between proximal dome and distal chevron osteotomies. This study aimed to compare radiographic and plantar pressure changes after distal chevron and proximal dome osteotomies and to investigate the effect of radiographic and plantar pressure changes on clinical outcomes. This study included 26 and 22 patients who underwent distal chevron and proximal dome osteotomies, respectively. Visual analog scale (VAS) and American Orthopaedic Foot & Ankle Society (AOFAS) forefoot scores were used to evaluate pain and functional outcomes. Hallux valgus angle, intermetatarsal angle, talar-first metatarsal angle, and calcaneal inclination angle were measured in the evaluation of radiographic outcomes. Preoperative and postoperative plantar pressure changes were evaluated. There were no statistically significant differences between the two groups in age, body mass index, or AOFAS forefoot and VAS scores. In the proximal dome group, the pressure measurement showed significant lateralization of the maximal anterior pressure point in the forefoot (P < .001). In addition, the postoperative calcaneal inclination angle was significantly lower (P = .004) and the talar-first metatarsal angle was significantly higher (P < .001) in the proximal dome group. Postoperative transfer metatarsalgia was observed in one patient (3.8%) in the distal chevron group and five (22.7%) in the proximal dome group (P < .05). Proximal dome osteotomy led to more lateralization of the maximum anterior pressure point, decreased calcaneal inclination angle and first metatarsal elevation, and related higher transfer metatarsalgia.

Distal Chevron Osteotomy vs The Simple, Effective, Rapid, Inexpensive Technique (SERI) for Mild to Moderate Isolated Hallux Valgus: A Randomized Controlled Study.

Hallux valgus is a common foot deformity that leads to functional disability with serious sequelae. Minimally invasive surgery is often used to treat hallux valgus in order to reduce wound complications and improve recovery time. The objective of this study was to compare a Simple, Effective, Rapid, Inexpensive (SERI) technique with a simple Chevron technique in patients with minimum of 1-year follow-up. Between the years 2014-2015, we performed a prospective study comparing the SERI minimally invasive technique to treat symptomatic hallux valgus with a standard chevron osteotomy technique. All procedures were performed by a single fellowship trained foot and ankle surgeon. Twenty-one patients were randomized to the SERI cohort and 15 to the standard Chevron technique. The mean preoperative intermetatarsal angle (IMA) of the SERI group was 14.8 ± 1.9 (11.9-22.9). The mean preoperative IMA of the Chevron control group was 13.3 ± 2.3 (10.4-18.2) (p = 0.038). The mean IMA two weeks after the surgery was 6.0 ± 2.3 (2.4-12) in the SERI group, and 6.1 ± 3 (2.6-13.1) in the control group. At the two-week and 1-year follow-up, there was no significant difference found in the IMA between the two groups (p = 0.871). The mean hallux valgus angle reduction was 11.85 ± 4.88 (3-20.8) and 11.09 ± 6.51 (- 1.1 to 22.5) in the SERI and Chevron groups, respectively (p = 0.69). Neither groups reported symptomatic transfer metatarsalgia throughout the follow-up period. The SERI group had increased metatarsophalangeal joint (MTPJ) motion (p < 0.001); however, all other parameters with similar. The SERI technique provided comparable outcomes at up to 1-year follow-up when compared with a standard Chevron osteotomy for moderate hallux valgus. This study demonstrated good reproducible results using the SERI technique for moderate hallux valgus. Level II Prospective Study. Approved by local IRB at MMC.

Surgically induced astigmatism in frown versus chevron incision in MSICS

Cataract surgery remains the foremost cause of reversible blindness globally. Phacoemulsification requires expensive equipment, instruments and higher cost of disposables, along with a longer training curve. Manual small incision cataract surgery (MSICS) has evolved to provide excellent postoperative results, with minimal cost. In developing countries like India, patients present with white/advanced cataract, for which MSICS has proven to provide the best results. MSCIS can be used in any type of cataract, with any type of foldable/rigid intraocular lens implantation. Minimising surgically induced astigmatism is of paramount importance as the patient achieves good uncorrected vision postoperatively, which is the need of the hour. The Chevron incision in MSICS has been reported to provide the best results. We undertook the present study in 100 eyes with white cataract/nuclear sclerosis of grade 4-6 to analyse and compare MSCIS through the Frown incision and Chevron incision. The mean surgically induced astigmatism incision was more in the Frown group (0.82D±0.62) than in the Chevron group (0.55D±0.42), which was statistically significant. (p 0.017). In the Frown versus Chevron group, the best uncorrected visual acuity was 6/12 or better in 62% and 82% respectively. Thus, the Chevron incision was superior to the Frown incision for MSICS, while both yielded good postoperative results. MSICS is the most affordable and effective surgery of choice, especially for white/ hard cataracts.

Midline Incision versus Chevron Incision in Open Radical Nephrectomy: Quality of Life Differences

Objective: Open radical nephrectomy can be performed through midline or chevron incision. This study aims to compare the quality of life between midline and chevron incision in open radical the nephrectomy since comparison studies between these approach focused on quality life are still lacking.&#x0D; Methods: This study includes total 31 patients that underwent open radical nephrectomy in Cipto Mangunkusumo Hospital Indonesia. The subjects were divided into midline and chevron groups using simple random sampling. Modified WHOQOL BREF and VAS pain score were compared between these groups.&#x0D; Results: Total 31 subjects included, with a male: female ratio 2.33:1 and age mean 49.81±13.1 with the incidence are highest at 41-60 years old. In our study, most subjects were diagnosed in T3-T4 with 58,07% overall. Clear cell renal cell carcinoma is the most frequent pathology result with 41,93% followed by Paper Renal cell Carcinoma 12.90%. VAS score is higher in Chevron group with result 2,47±1,40 compare to Midline group with 2,13±1,99. Match to the VAS score result, The Modified WHOQOL BREF Chevron group with mean 71,80±10,24 is lower than Midline group with 77,69±13,65. However, these differences are not statistically significant. The midline group was recorded two complications (IVC and spleen injury), whereas one complication (IVC injury) recorded in chevron group.&#x0D; Conclusion: Both chevron and the midline are safe methods for open nephrectomy. Even the midline incision show better VAS score and quality of life, and there are no significant differences between midline or chevron incision in postoperative quality of life, VAS scores and intraoperative bleeding.

Scarf versus long chevron osteotomies for the treatment of hallux valgus: A prospective randomized controlled study

BackgroundThe aim of this study is to compare scarf osteotomy and long chevron osteotomy in treatment of hallux valgus deformity regarding operative time, power of correction and complications. DesignA prospective randomized controlled comparative trial. Methods48 cases with hallux valgus were divided randomly in 2 groups (21 treated by scarf and 22 treated by long chevron osteotomy and 5 were missed during follow up), average age 36 years, follow up time was average of 25.9 months. Patients were assessed clinically, radiologically, and functional scoring system of American College of Foot and ankle Surgeons (ACFAS)was used both pre and postoperatively. ResultsOperative time was 69min in scarf group compared to 63min to long chevron group, radiological correction showed no statistically significant difference between both groups while functional improvement in ACFAS score was in favour of long chevron group 69.1% compared to scarf group 57.5% ConclusionsBoth osteotomies possess almost identical corrective power of the IMA (intermetatarsal angle) and similar clinical outcomes with slightly shorter operative time and subjective technical simplicity for the long chevron osteotomy.

Effect of First Tarsometatarsal Joint Derotational Arthrodesis on First Ray Dynamic Stability Compared to Distal Chevron Osteotomy.

Hallux valgus alters gait, compromising first ray stability and function of the windlass mechanism at the late stance. Hallux valgus correction should restore the stability of the first metatarsal. Comparative studies reporting the impact of different hallux valgus correction methods on gait are rare. We report the results of a case-control study between distal chevron osteotomy and first tarsometatarsal joint derotational arthrodesis (FTJDA). Two previously studied hallux valgus cohorts were matched: distal chevron osteotomy and FTJDA. Seventy-seven feet that underwent distal chevron osteotomy (chevron group) and 76 feet that underwent FTJDA (FTJDA group) were available for follow-up, with a mean of 7.9 years (range, 5.8-9.4 years) and 5.1 years (range, 3.0-8.3 years), respectively. Matching criteria were the hallux valgus angle (HVA) and a follow-up time difference of a maximum 24 months. Two matches were made: according to the preoperative HVA and the HVA at late follow-up. Matching provided 30 and 31 pairs, respectively. Relative impulses (%) of the first toe (T1) and metatarsal heads 1 to 5 (MTH1-5), weightbearing radiographs, and American Orthopaedic Foot & Ankle Society (AOFAS) (hallux metatarsophalangeal-interphalangeal [MTP-IP]) scores were studied. The relative impulse of MTH1 was higher in the FTJDA group, whereas a central dynamic loading pattern was seen in the chevron group. This result remained when relative impulses were analyzed according to the postoperative HVA. The mean difference in the HVA at follow-up was 6.2 degrees (95% confidence interval, 3.0-9.5; P = .001) in favor of the FTJDA group. The dynamic loading capacity of MTH1 was higher in the FTJDA group in comparison to the chevron group. The follow-up HVA remained better in the FTJDA group. Level III, case-control study.

Comparison of the Modified McBride Procedure and the Distal Chevron Osteotomy for Mild to Moderate Hallux Valgus

Distal metatarsal osteotomy and the modified McBride procedure have each been used for the treatment of mild to moderate hallux valgus. However, few studies have compared the results of these 2 procedures for mild to moderate hallux valgus. The purpose of the present study was to compare the results of distal chevron osteotomy and the modified McBride procedure for treatment of mild to moderate hallux valgus according to the severity of the deformity. We analyzed the data from 45 patients (49.5%; 48 feet [49.0%]), who had undergone an isolated modified McBride procedure (McBride group), and 46 patients (50.5%; 50 feet [51.0%]), who had a distal chevron osteotomy (chevron group). We subdivided each group into those with mild and moderate deformity and compared the clinical and radiologic outcomes between the groups in relation to the severity of the deformity. The improvements in the American Orthopaedic Foot and Ankle Society scale score and the visual analog scale for pain were significantly better for the chevron group for both mild and moderate deformity. The chevron group experienced significantly greater correction in the hallux valgus angle and intermetatarsal angle for both mild and moderate deformity. The chevron group experienced a significantly greater decrease in the grade of sesamoid displacement for patients with moderate deformity. The McBride group had a greater risk of recurrence than did the chevron group for moderate deformity (odds ratio 14.00, 95% confidence interval 3.91 to 50.06, p < .001). The results of the present study have demonstrated the superiority of the distal chevron osteotomy over the modified McBride procedure for mild to moderate deformity. For patients with moderate deformity, the McBride group had a greater risk of hallux valgus recurrence than did the distal chevron group. Therefore, we recommend distal chevron osteotomy rather than a modified McBride procedure for the treatment of mild and moderate hallux valgus.

Long-term Follow-up of a Randomized Controlled Trial Comparing Scarf to Chevron Osteotomy in Hallux Valgus Correction.

Hallux valgus is one of the most common foot deformities. This long-term follow-up study compared the results of 2 widely used operative treatments for hallux valgus: the scarf and chevron osteotomy. Conventional weight bearing anteroposterior (AP) radiographs of the foot were made for evaluating the intermetatarsal angle and hallux valgus angle. For clinical evaluation, the American Orthopaedic Foot & Ankle Society (AOFAS) rating system for the hallux metatarsophalangeal-interphalangeal scale was used together with physical examination of the foot. These data were compared with the results from the original study. The Short Form 36 questionnaire, the Manchester-Oxford Foot Questionnaire (MOXFQ), and a general questionnaire including a visual analog scale (VAS) pain score were used for subjective evaluation. The primary outcome measures were the radiologic recurrence of hallux valgus and reoperation rate of the same toe. Secondary outcome measures were the results from the radiographs and subjective and clinical evaluation. The response rate was 76% at the follow-up of 14 years; in the chevron group, 37 feet were included compared with 36 feet in the scarf group. Twenty-eight feet in the chevron group and 27 in the scarf group developed recurrence of hallux valgus (P = .483). One patient in the scarf group had a reoperation of the same toe compared with none in the chevron group (P = .314). Current VAS pain scores and results from the SF-36, MOXFQ, and AOFAS did not significantly differ between groups. Both techniques showed similar results after 2 years of follow-up. At 14 years of follow-up, neither technique was superior in preventing recurrence. Level II, randomized controlled trial.

Comparison of Chevron and Distal Oblique Osteotomy for Bunion Correction

The chevron osteotomy is a standard procedure by which bunions are corrected. One of us routinely performs a distal oblique osteotomy, which, to the best of our knowledge, has not been described for the correction of bunion deformities. The purpose of the present study was to compare the short- and medium-term results of the distal oblique and chevron osteotomies for bunion correction. We performed a retrospective clinical and radiographic comparison of patients who had undergone a distal oblique or chevron osteotomy for the correction of bunion deformity. In addition, a prospective patient satisfaction survey was undertaken. A total of 55 patients were included in the present study and were treated from January 2012 to November 2014. Of the 55 patients, 27 (49.2%) were in the chevron group and 28 (50.8%) in the distal oblique group. Radiographically, no statistically significant difference was found between the 2 groups with respect to postoperative first intermetatarsal angle (p < .0001) and hallux valgus angle (p < .0001), but a greater change was found in the intermetatarsal angle in the distal oblique group (p = .467). Prospective patient satisfaction scores were available for 33 patients (60%), 16 (29%) in the chevron group and 17 (31%) in the distal oblique group. When converting the satisfaction score to a numerical score, the chevron group scored 3.3 ± 1.1 and the distal oblique group scored 3.2 ± 0.8 (p = .812). We found that the distal oblique osteotomy used in the present study is simple and reliable and showed radiographic correction and patient satisfaction equivalent to those in the chevron osteotomy.

Scarf versus Chevron Osteotomy for the Correction of 1–2 Intermetatarsal Angle in Hallux Valgus: A Systematic Review and Meta-analysis

The chevron and scarf osteotomies are commonly used for the surgical management of hallux valgus (HV). However, there is debate as to whether one osteotomy provides more 1–2 intermetatarsal (1–2 IMA) correction than the other. The objective of this systematic review and meta-analysis was to compare the effectiveness of 3 types of first metatarsal osteotomy for reducing the 1–2 IMA in HV correction: the chevron osteotomy, the long plantar arm (modified) chevron osteotomy, and the scarf osteotomy. A systematic search for eligible studies was performed of the following databases: Medline, Embase (Ovid), CINAHL (EBSCO Host), and The Cochrane Database of Systematic Reviews and Cochrane Central Register of Controlled Clinical Trials. Only English-language studies previous to May 2010 were included in the review. Additional hand and electronic content searches of relevant foot and orthopaedic journals were performed. Criteria for inclusion in this analysis included systematic reviews of randomized controlled trials, prospective and retrospective cohort studies, and case-control studies, as well as case-series studies involving the chevron, scarf, or long plantar arm chevron osteotomy of >20 participants with a minimum of 80% follow-up. Quality of evidence of the included studies was assessed with the Grading of Recommendations Assessment, Development and Evaluation system. All pooled analyses were based on a fixed effects model. There was a total of 1351 participants who underwent either a chevron (n = 1028), scarf (n = 300), or long plantar arm chevron osteotomy (n = 23). Only one study for the long plantar arm chevron group fitted the eligibility criteria for this review; however, it was not amenable to meta-analysis. The chevron osteotomy was associated with a mean reduction of 1–2 IMA from preoperative to postoperative of 5.33° (95% confidence interval, 5.12 to 5.54, p < .001), and the scarf osteotomy was associated with a mean reduction of 6.21° (95% confidence interval, 5.70 to 6.72, p < .001). There was a statistically significant 0.88° increase in the correction of the 1–2 IMA in favor of the scarf osteotomy compared with the chevron osteotomy. The studies included in this review were of very low- to low-quality evidence. Our findings indicate that the scarf osteotomy provides greater correction of the 1–2 IMA when used for HV correction. However, only a weak recommendation in favor of the scarf osteotomy can be made based on the low quality of evidence of the studies included in this analysis.

Comparison of the Proximal Chevron and Ludloff Osteotomies for the Correction of Hallux Valgus

Although several studies have described good results of proximal chevron and Ludloff osteotomies, there have been no studies comparing the results of these two techniques at a single institution. We consecutively evaluated 46 patients who underwent proximal chevron osteotomies and 52 patients who underwent Ludloff osteotomies. Patients were evaluated by preoperative and postoperative weight bearing radiographs and the American Orthopaedic Foot and Ankle Society (AOFAS) hallux MP score. Both groups had similarly high AOFAS scores and good correction by radiographic parameters. No statistically significant differences were found with respect to correction of hallux valgus angle (HVA) and intermetatarsal angle (IMA) between the two groups. Significant shortening of the first metatarsal was found after Ludloff osteotomy (p < 0.05). At 6 weeks after surgery, the pain subscore was significantly lower in the proximal chevron group than in the Ludloff group (p < 0.05). The proximal chevron and Ludloff osteotomies yielded equivalent clinical and radiological results. The Ludloff osteotomy with lag screw fixation is more stable and does not require postoperative hardware removal, although it is technically demanding and has a tendency toward greater shortening of the first metatarsal.

Equivalent Correction in Scarf and Chevron Osteotomy in Moderate and Severe Hallux Valgus: A Randomized Controlled Trial

Chevron osteotomy is a widely accepted osteotomy for correction of hallux valgus.(18) Algorithms were developed to overcome the limitations of distal osteotomies. Scarf osteotomy has become popular as a versatile procedure that should be able to correct most cases of acquired hallux valgus. The purpose of this study was to evaluate whether patients with moderate or severe hallux valgus have better correction with a scarf osteotomy as compared to chevron osteotomy. After informed consent, 136 feet in 115 patients were randomized to 66 scarf and 70 chevron osteotomies. Deformities of patients were classified as mild, moderate and severe according to IMA, and both groups were compared with independent t-tests. The results were measured using radiographic HVA, IMA and DMAA measurements. There were no statistical differences in HVA, IMA and DMAA between scarf and chevron osteotomy in mild to moderate hallux valgus. In severe hallux valgus, chevron osteotomy corrected HVA better than scarf osteotomy, although this group consisted of twelve patients only. Five patients in the chevron group and seven in the scarf group developed recurrent subluxation of the metatarsophalangeal joint. In patients with moderate and severe hallux valgus, the results of chevron osteotomy were at least as effective as a scarf osteotomy. Recurrent subluxation of the first metatatarsophalangeal joint was the main cause for insufficient correction. We favor the chevron osteotomy because it is less invasive, without sacrificing correction of HVA and IMA.

The Lindgren and Chevron Osteotomies Were Not Different in Repair of Hallux Valgus

Question: In patients with hallux valgus, how does the Lindgren osteotomy compare with the distal chevron osteotomy? Design: Randomized (allocation concealed), blinded (outcome assessor), controlled trial with mean 4.7-year follow-up. Setting: A hospital in Stockholm, Sweden. Patients: 100 patients, 16 to 80 years of age (mean age 48 y, 94% women), with a hallux valgus angle (HVA) of 20° to 44°, a first-second intermetatarsal angle (IMA) of up to 20°, a distal metatarsal articular angle of up to 25°, no radiographic evidence of degenerative metatarsophalangeal (MTP) arthritis, and persistent symptoms. Exclusion criteria were a previous operation on the affected foot or a history of diabetes, peripheral vascular disease, peripheral neuropathy, rheumatoid arthritis, or other inflammatory diseases. Ninety percent of patients were available for a mean 4.7-year follow-up. Intervention: Patients were allocated to receive an osteotomy according to the Lindgren method (n= 50) or the chevron method (n = 50). The Lindgren osteotomy was subcapital and extra-articular. The straight skin incision was done medial to the extensor hallucis longus tendon. The dissection was to the bone with the saw blade aligned halfway between the perpendicular long axis of the first metatarsal and the plantar aspect of the foot. A transverse osteotomy was made at a 30° angle from the long axis of the metatarsal shaft. The distal fragment was displaced laterally, up to 8 to 10 mm. Pronation of the hallux was corrected as needed. The distal fragment was fixed with a 2.7-mm lag screw. The chevron osteotomy involved an incision over the MTP joint, placed straight medially without a tenotomy. The distal fragment was displaced laterally about 4 to 6 mm, and the osteotomy site was impacted on itself. The plantar and dorsal aspects of the flap were tightly closed before the capsular flap was reattached. No fixation was used. Main outcome measures: Functional outcome was graded with the American Orthopaedic Foot and Ankle Society (AOFAS) clinical rating system (pain [40 points], function [45 points], and alignment [15 points]); degree of pronation of the great toe (0 [no rotation] to 3 [>45° rotation]); pain on the 100-mm visual analog scale (VAS) (0 [no pain] to 100 [worst pain imaginable]); health-related quality of life in 5 dimensions (EuroQol-5D [EQ-5D]): mobility, self care, usual activities, pain or discomfort, and anxiety or depression; and radiographic parameters (HVA, IMA, and intermetatarsal distance [IMD]). Main results: At 1 year, both the Lindgren and chevron groups improved significantly in AOFAS scores (Table), VAS scores, and degree of great toe pronation, showing no difference between groups. Patients who were not satisfied with the cosmetic result (5 patients in each group) and those who had trouble wearing shoes at the time of follow-up (4 patients in each group) had lower EQ-5D scores. The HVA, IMA, and IMD decreased significantly in both groups but to a greater extent in the Lindgren group (Table). At 4.7 years, both groups showed partial loss of correction. Conclusion: In patients with hallux valgus, no significant differences in clinical improvement were seen between osteotomy performed with the Lindgren procedure or the distal chevron procedure, although a better radiographic correction was obtained with the Lindgren method.