双平面截骨术治疗合并跖骨远端关节面角增大的重度■外翻

目的总结双平面截骨术治疗合并跖骨远端关节面角(distal metatarsal articular angle,DMAA)增大的重度[足母]外翻疗效。方法回顾性分析2014年6月-2017年12月收治并获完整随访的64例(94足)合并DMAA增大的重度[足母]外翻患者临床资料。患者均接受双平面截骨术(跖骨远端Reverdin截骨术+跖骨近端开放楔形截骨术)联合Akin截骨术及软组织手术。男10例(15足),女54例(79足);年龄26~66岁,平均44.5岁。单侧34例,双侧30例。参照美国矫形足踝协会(AOFAS)Maryland跖趾关节评分系统评分为(54.3±7.4)分,疼痛视觉模拟评分(VAS)为(6.0±2.0)分。比较手术前后AOFAS Maryland跖趾关节评分系统评分及VAS评分,以及[足母]外翻角(hallux valgus angle,HVA)、第1-2跖骨间角(first-second intermetatarsal angle,1-2IMA)、DMAA、第1跖骨长度(first metatarsal length,FML)。结果术后切口均Ⅰ期愈合。患者均获随访,随访时间12~15个月,平均13.2个月。4足发生并发症,其中[足母]僵硬、内侧切口边缘皮肤感觉麻木、转移性跖痛、第1跖骨头坏死各1足。术后1年AOFAS Maryland跖趾关节评分为(89.2±7.4)分,与术前比较差异有统计学意义(t=18.427,P=0.000);其中优78足、良12足、中3足、差1足,优良率为95.7%。VAS评分为(1.5±2.0)分,较术前明显改善(t=10.238,P=0.000)。X线片复查显示术后3个月截骨均达骨性愈合。术后6个月及1年HVA、1-2IMA、DMAA与术前比较,差异均有统计学意义(P<0.05);术后1年FML与术前比较,差异无统计学意义(t=0.136,P=0.863)。结论双平面截骨术可以显著改善合并DMAA增大的重度[足母]外翻患者临床症状以及影像学参数,术后并发症少。     

Biomechanical differences among pes cavus, neutrally aligned, and pes planus feet in subjects with diabetes

The purpose of this study was to quantify differences in joint range of motion, foot deformity, and foot morphology among pes cavus, neutrally aligned, pes planus rigid, and pes planus flexible feet. A cohort of 1047 veterans with diabetes (contributing 2047 feet) was enrolled in a prospective study of diabetic ulcer risk factors (the Seattle Diabetic Foot Study). Significant differences between foot types were found. Pes cavus feet had an increased percentage of prominent metatarsal heads, bony prominences, and hammer/claw toes (p < .0001), as well as significantly increased amounts of hallux dorsiflexion and decreased amounts of hallux plantarflexion (p < .0001) with a total range of motion equal to the other foot types (p = .3). Neutrally aligned feet had a lower percentage of intrinsic muscle atrophy, bony prominences, and hammer/claw toes (p < .0001). Pes planus feet had an increased lateral talometatarsal angle (p < .0001) and an increased second metatarsal length. These data demonstrate structural differences between foot types in a population with diabetes.     

An association between functional second metatarsal length and midfoot arthrosis

BACKGROUND: Primary tarsometatarsal arthrosis is relatively uncommon. The etiology of osteoarthritis in the foot is poorly understood, and it is possible that mechanical or anatomic factors play a role. METHODS: We compared the relative length of the metatarsals in patients with idiopathic arthrosis of the midfoot with that in a group of controls without arthrosis. We analyzed the radiographs of all patients who had had an arthrodesis of the first, second, and third tarsometatarsal joints to treat arthrosis during a three-year period at a tertiary teaching hospital. We excluded patients with a history of inflammatory arthritis, trauma, or Charcot arthropathy. Nine patients (fifteen feet), seven women and two men with an average age of 64.2 years, met the inclusion criteria. We compared them with a control group consisting of the uninjured feet of patients with an acute traumatic injury to the hindfoot and the feet of volunteers with no foot problems. We measured the first, second, and fourth metatarsal lengths and the intermetatarsal angles on weight-bearing anteroposterior radiographs. We also measured the length of the first metatarsal relative to the long axis of the second metatarsal to define the functional first metatarsal length. The ratios of metatarsal lengths and the ratios of functional lengths were used for analysis to minimize differences in foot size and differences caused by radiographic magnification. Statistical comparisons between groups were then carried out. RESULTS: In the study group, the length of the first metatarsal was, on the average, 77.0% of the length of the second metatarsal, whereas, in the control group, the first metatarsal length was an average of 82.0% of the second metatarsal length. The functional length of the second metatarsal was, on the average, 18.6% greater than that of the first metatarsal in the study group and only an average of 4.1% greater than that of the first metatarsal in the control group. Both differences were significant (p < 0.0004 and p < 0.0001, respectively). CONCLUSIONS: Patients with midfoot arthrosis had a different ratio of the first to the second metatarsal length than did a similarly aged cohort without midfoot arthrosis. The patients had a relatively short first metatarsal or a relatively long second metatarsal, or both. Midfoot arthrosis may have a mechanical etiology. Recognition of risk factors is the first step in developing prevention strategies.     

How to avoid complications of distraction osteogenesis for first brachymetatarsia

Background and purpose Distraction osteogenesis may be used for the treatment of brachymetatarsia. However, few reports have been published on first metatarsal lengthening by this method. We evaluated the complications of distraction osteogenesis for first brachymetatarsia and here we provide a solution.Patients and methods 16 patients (27 feet) underwent distraction osteogenesis for first brachymetatarsia. Mean age at time of surgery was 20 (12–34) years and mean duration of postoperative follow-up was 5 (2–13) years. A unilateral external fixator was fixed at the medial aspect of the metatarsus. The distraction axis was parallel to the plantar surface of the foot in the sagittal plane and to the second metatarsal axis in the transversal plane.Results First metatarsal length expressed as a proportion of second metatarsal length was 60% (55–64). Average degree of metatarsal lengthening was 42% (34–54), and the average lengthening index was 64 (39–93) days/cm. The most common complication was stiffness of the metatarsophalangeal joint (12 feet). Deformities that included cavus foot and hallux valgus occurred in 3 feet each, and callus fractures occurred in 3 feet. The other complications were pin breakage and pin tract infection in 2 feet each.Interpretation Distraction osteogenesis for first brachymetatarsia can give satisfactory cosmetic and functional results. However, several complications are commonly encountered. This report on complications and their solutions may help those attempting distraction osteogenesis for first brachymetatarsia.     

正常足与外翻足的足底压力研究

目的　对正常足与外翻足的足底压力进行测量。方法　运用自行研制的足底生物力学测试系统对30 名健康人60 足,45 例外翻患者89 足进行了行走时足底压力的测试。结果　重度外翻组31 足和正常组相比,第一跖骨头下压力明显减低( P< 0.001),第二跖骨头下压力明显增加(P< 0 .05),第三、五跖骨头下压力有增高的趋势。结论　正常人前足第一跖骨头下压力最高,并向外侧递减。重度外翻足前足第一跖骨头下压力明显减低,第二跖骨头下压力明显增高     

Influence of the Length Ratio Between Second and Third Metatarsals After Modified Weil Osteotomy on Clinical Outcomes

Metatarsalgia is a frequent foot disorder. The objective was to evaluate whether the length ratio between the second and the third metatarsals after Weil osteotomy influences clinical outcomes. This retrospective study included 37 patients (53 feet). Preoperative planning consisted of keeping the second metatarsal greater than or equal to the third metatarsal after Weil osteotomy of the second metatarsal or the second and third metatarsals. Based on postoperative weightbearing and digital AP radiographs after Weil osteotomy, we divided the patients into 2 groups: group 1, the second metatarsal was longer than or equal to the third metatarsal; and group 2, the second metatarsal was shorter than the third metatarsal. We investigated whether there were differences between the groups. In 35 (66%) feet, the second metatarsal was longer than or equal to the third metatarsal (group 1), and in 18 (34%) feet, the second metatarsal was shorter than the third metatarsal (group 2). Postoperative American Orthopaedic Foot and Ankle Society scores were 86.2 and 82.7, respectively (p = .32). Postoperative Visual Analog Scale scores were 1.26 and 1.67, respectively (p = .39). The sample showed 11.3% of transfer metatarsalgia to the third metatarsal. Group 1 had 9% of transfer metatarsalgia, whereas group 2 had 17% of transfer metatarsalgia (p = .40). The presence of a second metatarsal shorter than the third metatarsal, after Weil osteotomy of the second metatarsal or the second and third metatarsals, does not influence outcomes or incidence of transfer metatarsalgia to the third metatarsal.     

Cavovarus foot treated with combined calcaneus and metatarsal osteotomies

Twenty-one feet in fifteen patients underwent osteotomies of the calcaneus and one or more metatarsals for symptomatic cavovarus foot deformity. Seven (nine feet) were male, and eight (twelve feet) were female. The etiology included hereditary motor sensory neuropathy (HMSN) (fifteen feet), post-polio syndrome (two feet), sacral cord lipomeningocele (two feet), parietal lobe porencephalic cyst (one foot), and idiopathic peripheral neuropathy (one foot). Presenting complaints were metatarsalgia (fifteen feet), ankle instablility (five), and ulceration beneath the second metatarsal head (one foot). Eleven feet were assessed using the Maryland Foot Rating Score. Maryland Foot Rating Score (University of Maryland, Baltimore, MD) improved from 72.1 (avg.) preoperatively to 89.9 (avg.) post-operatively (follow-up 70.9 months avg.). Eight feet were assessed using the AOFAS (American Orthopaedic Foot and Ankle Society) Ankle-Hindfoot and Midfoot Scores. The AOFAS Ankle-Hindfoot Score improved from 46.3 (avg.) pre-operatively to 89.1 (avg.) post-operatively, and the AOFAS Midfoot Score improved from 40.9 (avg.) pre-operatively to 88.8 (avg.) post-operatively (follow-up 20.8 months avg.). The postoperative AOFAS Ankle-Hindfoot Score for all nineteen feet was 90.8 (avg.) and the post-operative AOFAS Midfoot Score for all nineteen feet was 90.2 (avg.). Two patients were lost to follow-up and were not included in the study. Ankle, hindfoot, and midfoot motion was maintained or improved in sixteen feet. Complications included delayed union in two and nonunion in three of 66 metatarsal osteotomies. While three patients required an AFO (ankle-foot orthosis) for ambulation preoperatively, all patients were brace free postoperatively. All patients expressed willingness to undergo the same procedure again if it were necessary. Weight-bearing radiographs were available for 17 feet. Radiographic analysis revealed a decrease in forefoot adduction (9.6 degrees avg.) and a reduction in both hindfoot (9.1 degrees avg.) and forefoot cavus (10.6 degrees) leading to an overall 13 percent reduction in the height of the longitudinal arch. Lateral sliding elevating calcaneal osteotomy combined with dorsolateral closing wedge osteotomies of one or more metatarsal bases in the severe symptomatic cavovarus foot can provide a pain-free, plantigrade foot with a lowered longitudinal arch and a stable ankle without sacrificing motion.     

Is Double Metatarsal Osteotomy Superior to Proximal Chevron Osteotomy in Treatment of Hallux Valgus With Increased Distal Metatarsal Articular Angle?

We compared the results of proximal chevron osteotomy and double metatarsal osteotomy for hallux valgus with an increased distal metatarsal articular angle (DMAA). From October 2008 to December 2012, first metatarsal osteotomies were performed in 64 patients (69 feet) with symptomatic hallux valgus associated with an increased DMAA. Proximal chevron with Akin osteotomy and lateral soft tissue release was performed in 46 feet (PCO group); double metatarsal osteotomy and Akin osteotomy without lateral soft tissue release was performed in 23 feet (DMO group). Clinical assessments were performed using the American Orthopaedic Foot and Ankle Society (AOFAS) scale and visual analog scale (VAS). The hallux valgus angles, intermetatarsal angles, sesamoid positions, metatarsus adductus angles, and DMAAs were compared at different postoperative times. Postoperative shortening of first the metatarsal and complications were compared. The mean AOFAS scale and VAS scores showed significant improvement in both groups after surgery; however, no significant difference was observed between the 2 groups. The immediate postoperative hallux valgus angle and sesamoid position were significantly larger in DMO group; however, no intergroup difference was observed at the last follow-up visit, with the hallux valgus angle gradually increasing in the PCO group. The postoperative DMAA was significantly smaller in the DMO group. The mean shortening of the first metatarsal after surgery was significantly larger in the DMO group than in the PCO group. Transfer metatarsalgia developed in 1 foot (2.2%) in the PCO group and 2 feet (8.7%) in the DMO group. Partial avascular necrosis of the metatarsal head with advanced arthritis of the first metatarsophalangeal joint developed in 1 foot (4.3%) in the DMO group. In conclusion, no differences in the clinical and radiographic results were observed between the 2 groups for hallux valgus deformity with an increased DMAA.     

Weil截骨术与Jacopy截骨术治疗应力性跖痛症的临床疗效对比观察

背景：跖痛症是指发生于跖骨头下方的前足疼痛,可由解剖结构异常、病理性或医源性因素诱发。其病变主要是因为前足集中的局部应力负荷反复作用造成。治疗可分为保守治疗与手术治疗,对大部分跖痛症而言,采用保守治疗即可取得较好的疗效,若保守治疗无效,则可采取手术治疗,其目的是恢复前足正常的应力分布。目的：探讨跖骨远端weil截骨术与Jacoby截骨术治疗应力性跖痛症的临床疗效,从而为临床上更加合理有效的治疗跖痛症提供方法和依据。方法：2010年5月至2012年9月,我院收治应力性跖痛症患者65例,其中42例（63足）患者资料完整,得到随访,男8例（13足）,女34例（50足）;年龄39～78岁,平均56-3岁。单侧11例,双侧31例;病变于第2跖骨头下24例,第3跖骨头下ll例,第2、3跖骨头下同时累及7例。合并跖趾关节脱位12例,跽外翻畸形16例,跖间神经瘤5例。所有病例随机分为A、B两组,A组19例（32足）,B组23例（31足）。A组采用跖骨远端Weil截骨术、B组采用Jacoby截骨术治疗,经过平均18个月的随访,对手术前后局部疼痛症状、患者足底应力变化、足部功能改善情况进行比较分析。结果：两种手术前后疼痛缓解均有显著性差异,以Weil截骨组疼痛缓解更明显,但两组间疼痛缓解无明显统计学差异。两组患者手术前后患趾跖骨头下应力峰值明显下降。Weil截骨组,手术前后立位时和足跟抬高时的病变跖骨头下应力分别下降35％和51％;Jacoby截骨组分别下降25％,n45％。根据美国足踝外科协会Maryland跖趾关节百分评分法对两组患者进行评定：优,A组24足（占75％）,B组22足（占71％）;良,A组6足（占18．8％）,B组5足（占16．1％）;可,A组2足（占6．2％）,B组4足（占12．9％）。A组优良率为93．8％,B组为87．1％。结论：对于应力性跖痛症患者,跖骨远端Weil截骨术与Jacoby截骨术治疗均可取得满意确切的效果。但weil截骨术手术操作技巧要求更高,Jacoby截骨术对初学者更易掌握。临床需要根据患者的实际情况及个体需求灵活选择。     

外翻合并第二跖骨头下疼痛的生物力学定量研究

目的探讨跖骨头下压力变化与(足,母)外翻合并跖骨头下疼痛的关系,并对引起第二跖骨头下疼痛的跖骨头下压力进行定量分析.方法采用由中国中医研究院骨伤科研究所生物力学实验室研制的足底压力测试系统,对58名正常人(116足),32例(45足)(足,母)外翻单纯合并第二跖骨头下疼痛患者,56例(102足)(足,母)外翻无足底疼痛患者进行足底压力测试,将三组跖骨头下压力进行比较.采用病例-对照设计,研究压力与疼痛的关系,并对引起第二跖骨头下疼痛的压力进行定量分析.结果 (1)(足,母)外翻单纯合并第二跖骨头下疼痛组分别与(足,母)外翻无足底疼痛组及正常组比较,第二跖骨头下压力均明显增高(均P＜0.05);(2)第二跖骨头下压力高于正常组与第二跖骨头下压力不高于正常组比较,疼痛的发生率明显增加(P＜0.05,OR＞3,OR 95%CI＞1);(3)(足,母)外翻合并第二跖骨头下疼痛组第二跖骨头下压力占体重的5.20%～7.29%.结论跖骨头下压力异常增高是跖骨头下疼痛的危险因素,第二跖骨头下压力超过体重的5.20%,极易出现跖骨头下疼痛.     

Rheumatoid Forefoot Reconstruction in Nonrheumatic Patients: Lesser Metatarsal Head Resection versus Osteotomy

In the literature, first metatarsophalangeal joint arthrodesis with lesser metatarsal head resection seems to be a reliable procedure in rheumatoid foot deformity. Maybe this procedure could be proposed in nonrheumatoid severe forefoot deformity (hallux valgus angle >40° and lesser metatarsophalangeal dislocation). The aim of this study was to compare radiological and clinical outcomes between lesser metatarsal head resection and lesser metatarsal head osteotomy in nonrheumatoid patients. Thirty-nine patients (56 feet) suffering from well-defined nonrheumatoid severe forefoot deformity were retrospectively enrolled in our institution between 2009 and 2015. Metatarsal head resection and metatarsal head osteotomy represented 13 patients (20 feet) and 26 patients (36 feet), respectively. In this observational study, a rheumatoid population (21 patients) was included as the control. The clinical outcome measures consisted of American Orthopaedic Foot and Ankle Society score, Foot and Ankle Ability Measurement, and Short Form-36. The radiological outcomes were: intermetatarsal angle, hallux valgus angle, and metatarsophalangeal alignment. Mean follow-up was 24 months. Satisfaction rate was, respectively, 92% for resection, 91% for osteotomy procedure, and 80% for surgery in rheumatoid patients. Short Form-36 global score was, respectively, 80.7 (52.5-96.4), 76 (57.7-93), and 68.3 (22.6-86). No functional outcome difference was found between resection and osteotomy procedures, except that the metatarsal head resection group had poorer results in sports activities than the osteotomy group. Complications were similar between osteotomy and resection (p > .05). The radiological outcomes were improved significantly from preoperative to postoperative. First metatarsophalangeal joint arthrodesis with lesser metatarsal head resection in nonrheumatoid severe forefoot deformity might be a good therapeutic option.     

Hypermobility of the first metatarsal bone in patients with Rheumatoid arthritis treated by lapidus procedure

ABSTRACT: BACKGROUND: Foot deformities and related problems of the forefoot are very common in patients with rheumatoid arthritis. The laxity of the medial cuneometatarsal joint and its synovitis are important factors in the development of forefoot deformity. The impaired joint causes the first metatarsal bone to become unstable in the frontal and sagittal planes. In this retrospective study we evaluated data of patients with rheumatoid arthritis who underwent Lapidus procedure. We evaluated the role of the instability in a group of patients, focusing mainly on the clinical symptoms and X-ray signs of the instability. METHODS: The study group included 125 patients with rheumatoid arthritis. The indications of the Lapidus procedure were a hallux valgus deformity greater than 15 degrees and varus deformity of the first metatarsal bone with the intermetatarsal angle greater than 15 degrees on anterio-posterior weight-bearing X-ray. RESULTS: Data of 143 Lapidus procedures of 125 patients with rheumatoid arthritis, who underwent surgery between 2004 and 2010 was evaluated. Signs and symptoms of the first metatarsal bone instability was found in 92 feet (64.3 %) in our group. The AOFAS score was 48.6 before and 87.6 six months after the foot reconstruction. Nonunion of the medial cuneometatarsal joint arthrodesis on X-rays occurred in seven feet (4.9 %). CONCLUSION: The Lapidus procedure provides the possibility to correct the first metatarsal bone varus position and its instability, as well as providing the possibility to achieve a painless foot for walking. We recommend using the procedure as a preventive surgery in poorly symptomatic patients with rheumatoid arthritis in case of the first metatarsal bone hypermobility.     

Hallux valgus in the younger patient: the structural abnormality.

Standardised radiographs of the weight-bearing foot were analysed in fifty young patients undergoing osteotomy of the first metatarsal for hallux valgus. True metatarsus primus varus was not found more frequently than in a control series. The intermetatarsal angle was significantly greater in affected feet compared with controls. The structural abnormality in hallux valgus in the young is therefore due to a valgus disposition of the second and subsequent metatarsals, rather than varus inclination of the first metatarsal.     

第1跖骨基底截骨结合Chevron-Gerbert手术治疗严重(足母)外翻畸形

目的 探讨第1跖骨基底截骨结合Chevron-Gerbert手术治疗严重(足母)外翻畸形的临床疗效.方法 2004年6月至2008年8月利用第1跖骨基底截骨结合Chevron-Gerbert手术治疗重度(足母)外翻患者37例(66足),男性5例(10足),女性21例(38足);年龄21～76岁,平均58岁.术前、术后、随访时均拍摄足部负重位正、侧位X线片,测量(足母)外翻角、第1、2跖骨间角、近侧关节固定角.比较术前、术后6周、末次随访时(足母)外翻相关各角度的X线测量值,并结合美国足踝外科协会(AOFAS)的Maryland评分法观察疗效.结果 本组患者26例(48足)得到随访,随访时间1～4年,平均2.3年.末次随访时(足母)外翻角较术前纠正25.6°±3.8°,第1、2跖骨间角较术前纠正8.6°±2.4°,近侧关节固定角较术前纠正4.7°±4.2°.根据AOFAS百分评分法评定,优15例(28足)、良8例(16足)、可3例(4足),优良率为91.7%.结论 利用第1跖骨基底截骨结合Chevron-Gerbert手术治疗严重(足母)外翻畸形的临床疗效良好,但有手术相对复杂、需行多段截骨及内固定等缺点.     

(足母)外翻矫正术-3种手术方法分析

[目的]观察利用三种手术方法治疗[足母]外翻畸形的疗效.[方法]自2000年1月～2003年12月实施[足母]外翻矫正术60例（83足）.术前按照生物力学原理对全部病例进行分析,根据[足母]外翻畸形程度、足部生物力学异常的状况和病人年龄分为3组.选择3种手术方法进行治疗：（1）第1跖骨头截骨术（Reverdin手术）组：25例,39足.（2）软组织平衡手术（McBride手术）或结合第1跖骨基底截骨术组,15例,20足.（3）跖[足母]关节成形术（Keller手术）或结合第1跖骨基底截骨术组：20例,24足.[结果]本组60例手术全部成功,无手术并发症.48例得到随访,随访时间1～4a,平均2a5个月。其中Reverdin手术组：20例，31足，优良率90．3％；McBride手术组：12例，16足，优良率87．5％；Keller手术组：16例，19足，优良率84．2％。[结论][足母]外翻畸形是最常见的足部疾病，不同病人患足牛物力学异常的状况是不同的。根据病人具体情况采取相应手术方法，恢复其正常的生物力学状态，才能获得良好的治疗效果。     

改良Ludloff截骨术的几何形态学基础及其临床应用

目的 探讨Ludloff截骨术治疗母外翻后出现跖骨短缩、抬高及远端旋转的解决方案.方法 30例正常足,摄足部正侧位X线片,测量第一跖骨的长度及矢状面截骨角.计算在不同截骨条件下跖骨的抬高、短缩及旋前的理论值.根据该理论值,设计Ludloff截骨术的手术方案治疗??外翻.18例23足??外翻患者,如第一跖骨头内旋<3°,行单纯Ludloff截骨术;内旋角度为3°~6°,需行有冠状面截骨角的Ludloff截骨术;内旋角度>6°,行基底在外侧的楔形截骨;其中8足同时行第一跖骨远端截骨术以矫正跖骨远端关节角.采用??趾跖趾-趾间关节评分表及二至五趾跖趾-趾间关节评分表(AOFAS)进行疗效评定.结果 正常足第一跖骨的长度为4.60~6.90cm,平均(6.09±0.43)cm;矢状面截骨角为20.7°~31.3°,平均25.58°±2.73°.18例患者均获得随访,随访时间6~24个月,平均18个月.??趾跖趾-趾间关节评分:90~100分18足(78%),80~89分3足(13%),70~79分足2例(9%),评分平均增加36分(术前56分,术后92分);二至五趾跖趾-趾间关节评分:90~100分5足(22%),80~89分7足(30%),70~79分11足(48%),评分平均增加21分(术前59分,术后80分).结论 根据??外翻患者第一跖骨头不同的内旋角度,选取有冠状面截骨角或有基底在外侧的楔形截骨的Ludloff截骨术,可取得较理想的临床疗效.     

Precise anatomic configuration changes in the first ray of the hallux valgus foot

To detect precise anatomical configuration of the first ray in feet with hallux valgus, a two-dimensional coordinate system was devised for evaluation of a weight-bearing dorsoplantar radiograph. The radiographs, taken from 229 feet of 114 patients with symptomatic hallux valgus and 94 normal feet, were investigated. A comparative study showed the first metatarsal head of a foot with hallux valgus was located on the medial side of that of the normal foot and the base of the proximal phalanx of the hallux valgus foot was located on the same point of that of the normal foot. Lateral translation of the base of the proximal phalanx occurred only in cases with overlap toes. Our study shows that subluxation of the metatarsophalangeal joint in hallux valgus is primarily caused by metatarsus primus varus. This study indicated that first metatarsal osteotomies should be given the first priority in consideration for bunion surgery, because these procedures could move the first metatarsal heads laterally in a more normal position.     

Juvenile hallux valgus deformity: surgical management by lateral hemiepiphyseodesis of the great toe metatarsal

Surgical correction of juvenile hallux valgus (JHV) by soft tissue balancing or skeletal realignment is associated with a high rate of recurrence of the deformity. An alternative treatment strategy for the management of symptomatic or progressive JHV, consisting of lateral hemiepiphyseodesis of the great toe metatarsal physis, has been used at our institution since 1996. A review of these cases was performed to determine the outcomes in the technical and patient satisfaction domains. Preoperative and follow-up radiographs of the foot were analyzed to measure the intermetatarsal angle (IMA), the hallux valgus angle (HVA), the proximal metatarsal articular angle (PMAA), and the metatarsal length ratio. Repeated measures of the radiographs were performed to determine intraobserver reliability. The medical records were reviewed to determine the children's age at presentation, chief complaints, age at surgery, tourniquet time of the surgical procedure, length of follow-up, the need for subsequent foot surgeries, and complications. Follow-up clinic or telephone interviews were performed to determine patient satisfaction. Seven children with 11 feet treated for JHV were available for study. Mean age at the time of the index surgery was 10 years 4 months (range, 9 years 7 months-11 years 1 month). Mean follow up after surgery was 4 years 2 months (range, 1 year 7 months-7 years 6 months). The mean improvement in the IMA was 2.32 degrees (range, 0-5 degrees; P < 0.0001). The mean improvement in the HVA was 3.45 degrees (range, 0-9 degrees; P = 0.027). Significant correction of both the IMA and the HVA was achieved in 6 (55%) of 11 of the feet. In no case did either of the measures worsen. The mean change in the PMAA in the anteroposterior plane was 5.09 degrees (range, 0-11 degrees; P = 0.001). The mean change in the PMAA in the lateral plane was 1.00 degree (range, 0-3 degrees; P = 0.008). The mean change in the metatarsal length ratio was 0.01 (range, 0.07-0.11), which was not statistically significant (P = 0.65). Lateral hemiepiphyseodesis of the great toe metatarsal was effective at halting the progression of the JHV deformity in all cases and achieved significant correction of both the IMA and the HVA in more than 50% of the feet. Lateral hemiepiphyseodesis of the great toe metatarsal is a reasonable alternative for the management of symptomatic or progressive JHV, given the high recurrence rate associated with other soft tissue and skeletal surgical procedures.     

Complications of distraction osteogenesis in short first metatarsals

The authors analyzed the results and complications of metatarsal lengthening in short first metatarsals by distraction osteogenesis. There were 13 first metatarsal lengthenings in eight patients. Mean age was 18.8 years and the average percentage of lengthening was 49.2%. The average healing index was 72.4 days/cm. The major complication was cavus foot, which was noticed in four feet. All great toes showed some loss of motion at metatarsophalangeal (MP) joint. Other complications were hallux valgus, angulation of the metatarsals, and pin tract infection each in two feet. The functional score according to the American Orthopedic Foot and Ankle Society (AOFAS) hallux MP joint, interphalangeal joint scale was excellent in 11 and good in 2. All patients were satisfied with the procedure. To avoid potential complications such as MP joint subluxation, cavus foot, and hallux valgus, the first metatarsal lengthening should not exceed 50% of the original length.