The Potential of Endoscopic Spring Ligament Repair in Flatfoot Reconstruction.

BACKGROUND: Spring ligament fulfills 2 main important functions: one, supporting the head of the talus and stabilizing the talonavicular joint, and the other, maintaining the longitudinal arch by acting as a static support. In this preliminary report, we describe an endoscopic repair for spring ligament injuries with modified portals. METHODS: We performed a retrospective case series study from February 2019 to January 2022. Posterior tibial tendon and/or associated bone deformities were assessed at the same surgical procedure. All patients were ≥18 years old and they had more than 6 months of follow-up. The procedure was performed in 11 patients. Mean age was 46 years (range 18-63). Ten had concomitant bony realignment surgery, and 8 had posterior tibial tendon surgery. RESULTS: In all patients, endoscopic spring ligament repair could be technically done. The modified portals were used in all procedures as described in the surgical technique. Three patients had a superficial lesion, 1 had a rupture <5 mm, 7 had a rupture >5 mm but not a complete rupture through the entire spring ligament. Most of the patients had good clinical results from the surgery that included endoscopic spring ligament debridement and/or repair at 2 years follow up. CONCLUSION: In this small series we found that endoscopy may be an effective technique to diagnose and treat incomplete spring ligament injuries. LEVEL OF EVIDENCE: Level IV, retrospective case series.

Osteotomía de Evans sin injerto óseo en el pie plano estadio IIB del adulto / Evans osteotomy without bone graft in stage IIB adult flatfoot deformity

Objetivo: Evaluar los resultados radiográficos y funcionales al año de la cirugía, en una serie consecutiva de pacientes con diagnóstico de pie plano valgo estadio IIB, sometidos a una osteotomía de Evans sin injerto óseo. Materiales y Métodos: Se evaluó, en forma retrospectiva, a dos grupos de pacientes: grupo 1 (placa con espaciador, n = 12) y grupo 2 (celdas de PEEK, n = 14). La edad promedio era de 47 años (DE 18) en el grupo 1 y de 54 años (DE 12) en el grupo 2. Resultados:Se evaluó a 26 pacientes (28 pies operados); 20 (77%) eran mujeres. Las mediciones radiográficas: ángulo de inclinación del calcáneo, ángulo astrágalo-calcáneo (perfil), ángulo astrágalo-calcáneo (frente), cobertura astragalonavicular, altura de la columna medial, longitud de la columna externa, arrojaron diferencias estadísticamente significativas entre las determinaciones preoperatorias y al año de la cirugía. El puntaje promedio de la escala de la AOFAS al año fue de 96 (DE 4,70) en el grupo 1 y de 95 (DE 4,98) en el grupo 2. El puntaje en la escala analógica visual para dolor fue de 1,2 (DE 0,42) en el grupo 1 y 1,16 (DE 0,46) en el grupo 2.Conclusiones:De acuerdo con los resultados obtenidos, concluimos en que la osteotomía de Evans sin el uso de injerto óseo logra preservar las correcciones obtenidas en el mediano plazo utilizando placas con espaciador o celdas de PEEK. Nivel de Evidencia: III

Objective: To evaluate the radiological and functional outcomes one year after surgery in a consecutive series of patients diagnosed with stage IIB adult-acquired flatfoot deformity who underwent Evans osteotomy without the use of bone graft. Materials and Methods: Two groups of patients were retrospectively evaluated: group 1 (spacer plate, n=12) and group 2 (PEEK cage, n=14). The mean age was 47 years (SD 18) in group 1 and 54 years (SD 12) in group 2. Results:26 patients (28 feet) were evaluated; 14 (84%) of the patients were women. Radiographic measurements calcaneal pitch angle, (lateral) talocalcaneal angle, (AP) talocal-caneal angle, talonavicular coverage angle, medial column height, lateral column length yielded statistically significant differences between preoperative measurements and those taken one year after surgery. The mean score on the AOFAS scale one year after surgery was 96 (SD 4.70) in group 1 and 95 (SD 4.98) in group 2. Regarding the visual analog scale, it was 1.2 (SD 0.42) in group 1 and 1.16 (SD 0.46) in group 2. Conclusions: According to the results obtained, we conclude that Evans osteotomy without the use of bone graft manages to preserve the corrections obtained in the medium term, using either spacer plates or PEEK cages. Level of Evidence: III

Radiographic Outcomes of Talonavicular Joint Arthrodesis With Varying Fixation Techniques in Stage III Adult Acquired Flatfoot Reconstruction.

Utilization of the talonavicular joint (TN) arthrodesis as an isolated procedure or in combination with hindfoot arthrodesis has been described in the literature for treatment of numerous hindfoot conditions. When used in isolation or with concomitant hindfoot arthrodesis, the TN joint has demonstrated nonunion rates reported as high as 37% in the literature. Despite previous research, there remains a lack of agreement upon the ideal fixation technique for TN joint arthrodesis with and without concomitant subtalar joint arthrodesis. The purpose of this study was to retrospectively compare the radiographic and clinical results of TN joint arthrodesis as part of double arthrodesis procedure utilizing 4 separate fixation constructs in the treatment of advanced hindfoot malalignment in stage III adult-acquired flatfoot deformity. We retrospectively reviewed 105 patients who underwent TN joint arthrodesis as part of double arthrodesis procedure utilizing 4 separate fixation constructs. Our results demonstrated a nonunion rate of 16.2%, with 17 nonunions identified within our patient population. One (2.4%) nonunion was observed in the 3-screw cohort, 7 (33.3%) nonunions were observed in the 2-screw cohort, 4 (16.0%) nonunions were observed in the 2-screw plus plate cohort, and 5 (29.4%) nonunions were observed in the 1-screw plus plate cohort. The difference in nonunion rate between the 4 cohorts was statistically significant. Based on these results, we conclude that the use of a 3-screw construct for TN joint arthrodesis as part of double arthrodesis procedure demonstrates a statistically significant reduction in nonunion rate and should be considered a superior fixation construct for this procedure.

Radiographic Analysis and Clinical Efficacy of Hindfoot Arthrodesis With Versus Without Cotton Osteotomy in Stage III Adult Acquired Flatfoot Deformity.

Forefoot varus develops as a result of longstanding adult-acquired flatfoot deformity (AAFD). This occurs with varying degrees of deformity and flexibility. Residual forefoot varus following hindfoot realignment in AAFD can lead to lateral column loading and a persistent pronatory moment in efforts to reestablish contact between the forefoot and the ground. The Cotton osteotomy may serve as a reasonable adjunct procedure to help avoid complications and poor outcomes associated with residual forefoot varus in patients undergoing hindfoot arthrodesis for stage III AAFD. The aim of this study was to compare the radiographic outcomes in patients undergoing isolated hindfoot arthrodesis to patients undergoing hindfoot arthrodesis with adjunctive cotton osteotomy. We retrospectively reviewed 47 patients matched based upon age, sex, and comorbidities who underwent hindfoot reconstruction for the treatment of stage III AAFD between 2015 and 2019. A retrospective radiographic review was performed on standard weightbearing radiographs including anterior-posterior and lateral views preoperatively, postoperatively at the initiation of full weightbearing, and at final follow-up. Statistical analysis utilizing paired t test to calculate p values where <.05 was statistically significant. At final follow-up, radiographic measurements showed statistically significant differences in CAA, calcaneal inclination, talo-calcaneal, and talar tilt (p value <.05). The Cotton osteotomy group showed a quicker return to presurgical activity level and a decreased incident of tibiotalar valgus. Our study suggests that the Cotton osteotomy can address residual forefoot varus and potentially prevent further progression of ankle valgus in AAFD when used in combination with hindfoot arthrodesis.

[Acquired flat foot of the adult by posterior tibial dysfunction. Options for surgical treatment]. / Pie plano adquirido del adulto por disfunción del tibial posterior. Opciones para el tratamiento quirúrgico.

We present the possible etiopatogenic causes of posterior tibial dysfunction or painful flat foot of the adult and the cause-and-effect relationship that may exist. We also expose the gradation of the lesion and the different therapeutic options for the surgical treatment of the deformity. Since 1939, multiple articles have been published, which have been endorsed by clinical, experimental, electromyographic and biomechanical studies; publications that have been consulted and evaluated for the development of this review. In our opinion: the dysfunction of the posterior tibial is caused in principle by a failure of the plantar navicular calcaneus ligament (spring ligament), the main passive stabilizer of the internal plantar arch. This failure would, in time, mean an increase in work of the posterior tibial tendon, in itself "insufficient", which would go into fatigue, until it reached a partial or total rupture. Published work on soft-part procedures acting on the posterior tibial tendon in stage II has not had the expected result in the natural history of deformity. Arthrodesis, on the other hand, has been effective in other stages, but is associated with a loss of movement dynamics in the back foot and increased pressure on adjacent joints.

Presentamos la posible causa etiopatogénica de la disfunción del tibial posterior o pie plano doloroso del adulto y la relación causa-efecto que puede existir. También exponemos la clasificación de la lesión y las diferentes opciones para el tratamiento quirúrgico de la deformidad. Desde 1939, múltiples artículos han sido publicados, avalados por la clínica, así como por estudios experimentales, electromiográficos y biomecánicos; publicaciones consultadas y evaluadas para el desarrollo de esta revisión, según nuestro criterio: el primum movens de la disfunción del tibial posterior es ocasionado por un fallo del ligamento en hamaca o calcáneo navicular plantar (spring ligament), principal estabilizador pasivo del arco plantar interno. Este fallo supondría en el tiempo un aumento de trabajo del tendón tibial posterior, de por sí "insuficiente", que entraría en fatiga hasta llegar a la rotura parcial o total. Los trabajos publicados en relación con los procedimientos de partes blandas que actúan sobre el tendón tibial posterior en el estadio II no han tenido el resultado esperado en la historia natural de la deformidad. La artrodesis por el contrario, ha sido efectiva en otros estadios, pero está asociada a una pérdida de la dinámica del movimiento en el retropié y a un aumento de la presión en las articulaciones adyacentes.

Double hindfoot arthrodesis using a single-incision medial approach in the correction of adult-acquired flatfoot deformity: a case series.

BACKGROUND: Hindfoot arthrodesis is used in patients with advanced-stage acquired flatfoot, usually associated with degenerative joint disease. The objective of the present study was to evaluate the clinical and radiographic results of hindfoot arthrodesis using the single-incision medial approach. METHODS: A case series of 18 consecutive patients undergoing surgical correction between 2015 and 2018 with hindfoot arthrodesis using the medial approach was evaluated. The clinical assessment used the visual analog pain scale, AOFAS hindfoot score, SF-36, and foot function index. Radiographs and personal satisfaction criteria were also analyzed. RESULTS: All radiographic parameters evaluated showed a significant improvement (p < .05), except the calcaneal pitch. Pain decreased by 5.1 points (p < .001), and the mean final AOFAS score was 72.6. In three feet, a new surgery was required. Two feet developed talar necrosis. None of the cases presented surgical wound dehiscence, and two presented with superficial infection, which was resolved with the use of oral antibiotics. CONCLUSION: Double arthrodesis (subtalar and talonavicular) to correct adult-acquired valgus flatfoot using a medial approach has a low risk of soft tissue complications and presents satisfactory functional results. Avascular necrosis is a serious complication that was present in 11% of cases.

Finite element analysis of secondary effect of midfoot fusions on the spring ligament in the management of adult acquired flatfoot.

BACKGROUND: Surgical treatment of adult acquired flatfoot deformity can involve arthrodesis of the midfoot to stabilize the medial column. Few experimental studies have assessed the biomechanical effects of these fusions, because of the difficulty of measuring these parameters in cadavers. Our objective was to quantify the biomechanical stress caused by various types of midfoot arthrodesis on the Spring ligament. To date this is not known. METHODS: An innovative finite element model was used to evaluate flatfoot scenarios treated with various combinations of midfoot arthrodesis. All the bones, cartilages and tissues related to adult acquired flatfoot deformity were included, respecting their biomechanical characteristics. The stress changes on the Spring ligament were quantified. Both foot arch lengthening and falling were measured for each of the midfoot arthrodeses evaluated. FINDINGS: Arthrodesis performed for stabilization of the talonavicular joint leads to a higher decrease in stress on the Spring ligament. Talonavicular fusion generated a Spring ligament stress decrease of about 61% with respect to the reference case (without any fusion). However, fusing the naviculocuneiform joints leads to an increase in the stress on the Spring ligament. INTERPRETATION: This important finding has been unknown to date. We advocate caution regarding fusion of the naviculocuneiform joint as it leads to increased stresses across the Spring ligament and therefore accelerates the development of planovalgus.

Posterior Tibial Tendon Allograft Reconstruction for Stage II Adult Acquired Flatfoot: A Case Series.

Surgical treatment for a stage II adult acquired flatfoot has consisted of reconstruction of the diseased posterior tibial tendon with flexor digitorum longus tendon transfer, combined with osteotomies to address the underlying deformity. This case series presents an alternative to tendon transfer using allograft tendon for posterior tibial tendon reconstruction. Four patients who underwent stage II flatfoot reconstruction with posterior tibial tendon allograft transplantation were included. All patients had preoperative radiographs demonstrating flatfoot deformity and magnetic resonance imaging showing advanced tendinopathy of the posterior tibial tendon. Allograft tendon transplant was considered in patients demonstrating adequate posterior tibial tendon excursion during intraoperative assessment. Additional procedures were performed as necessary depending on patient pathology. Postoperatively, all patients remained non-weightbearing in a short leg cast for 6 weeks. Radiographs performed during the postoperative course demonstrated well-maintained and improved alignment. No complications were encountered. Each patient demonstrated grade 5 muscle strength and were able to perform a single-limb heel rise at the time of final follow-up. The average follow-up duration was 19.0 months. Flexor digitorum longus transfer has been studied extensively for stage II adult acquired flatfoot. However, the flexor digitorum longus has been shown to be much weaker relative to the posterior tibial tendon, and concern remains regarding its ability to recreate the force of the posterior tibial tendon. Our results demonstrate that posterior tibial tendon allograft reconstruction combined with flatfoot reconstruction is a reasonable option. This alternative has the advantage of preserving the stronger muscle without disturbing regional anatomy.

Analysis of biomechanical stresses caused by hindfoot joint arthrodesis in the treatment of adult acquired flatfoot deformity: A finite element study.

BACKGROUND: Treatments of adult acquired flatfoot deformity in early stages (I-IIa-IIb) are focused on strengthening tendons, in isolation or combined with osteotomies, but in stage III, rigidity of foot deformity requires more restrictive procedures such as hindfoot joint arthrodesis. Few experimental studies have assessed the biomechanical effects of these treatments, because of the difficulty of measuring these parameters in cadavers. Our objective was to quantify the biomechanical stress caused by both isolated hindfoot arthrodesis and triple arthrodesis on the main tissues that support the plantar arch. METHODS: An innovative finite element model was used to evaluate some flatfoot scenarios treated with isolated hindfoot arthrodesis and triple arthrodesis. RESULTS AND CONCLUSIONS: When arthrodeses are done in situ, talonavicular seems a good option, possible superior to subtalar and at least equivalent to triple. Calcaneocuboid arthrodesis reduces significantly both fascia plantar and spring ligament stresses but concentrates higher stresses around the fused joint.

What is the Prognosis of Triple Arthrodesis in the Treatment of Adult Acquired Flatfoot Deformity (AAFD)? / Qual o prognóstico da artrodese tríplice quando utilizada no tratamento do pé plano adquirido do adulto (PPAA)?

Abstract Objective The present study aims to evaluate the ability of triple arthrodesis in eliminating the main complaints presented by patients with adult acquired flatfoot deformity (AAFD): 1) disabling hindfoot pain; 2) major deformities, such asmedial arch collapse, valgus, abduction, and supination. Methods A total of 17 patients (20 feet) with advanced AAFD who underwent surgical correction by triple arthrodesis were evaluated after a mean follow-up period of 43 months (range: 18-84 months). The average age of the patients at surgery was 62 years old (range: 38-79 years old). The visual analogue scale (VAS) for pain and the American Orthopaedic Foot and Ankle Society (AOFAS) hindfoot score were used to assess the final results. Results According to the VAS, the average residual pain was 3 points; the AOFAS hindfoot score points increased 23% after the surgery; and the correction of deformities was considered satisfactory in 10 out of 20 feet; partially satisfactory in 4 out of 20 feet; partially unsatisfactory in 5 out of 20 feet; and unsatisfactory in 1 out of 20 feet. Conclusion Despite the high index of bone fusion after triple arthrodesis, which is the gold standard treatment in advanced AAFD, the incomplete correction of major deformities and the persistence of residual pain contributed to a high disappointment rate of the patients with the surgical results.

Resumo Objetivo Avaliar a capacidade da artrodese tríplice de aliviar as principais queixas dos pacientes que apresentam pé plano adquirido do adulto (PPAA): 1) dor incapacitante localizada no médio e retropé; 2) deformidades marcadas pelo colapso do arco medial, valgo, abdução e supinação. Método Avaliamos 17 pacientes (20 pés) portadores de PPAA em estado avançado que foram submetidos à correção cirúrgica pela artrodese tríplice modelante. A média de idade dos pacientes no momento da cirurgia foi de 62 anos (variação de 38 a 79 anos), e o tempo médio de seguimento foi de 43 meses (variação de 18 a 84 meses). Utilizamos critérios clínicos empregando a escala visual analógica da dor (EVAD) e a escala funcional da American Orthopaedic Foot and Ankle Society (AOFAS, na sigla em inglês) do retropé para avaliar a eficácia da cirurgia. Resultados A dor residual mensurada pela EVAD foi de três pontos, em média. Observamos incremento médio de 23% nos valores da escala AOFAS do retropé após o tratamento cirúrgico. A correção das deformidades foi satisfatória em 10 de 20 pés; parcialmente satisfatória em 4 de 20 pés; parcialmente insatisfatória em 5 de 20 pés; e insatisfatória em 1 de 20 pés. Conclusão Apesar da artrodese tríplice modelante indicada no tratamento do PPAA em estágio avançado apresentar alto índice de consolidação óssea, a correção incompleta das deformidades pré-existentes e a persistência de dor residual contribuíram para a elevada taxa de decepção dos pacientes com o resultado da cirurgia.

Occurrence of Lateral Ankle Ligament Disease With Stage 2 to 3 Adult-Acquired Flatfoot Deformity Confirmed via Magnetic Resonance Imaging: A Retrospective Study.

Lateral hindfoot pain associated with stage 2 to 3 adult-acquired flatfoot is often attributed to subfibular impingement. Preoperative magnetic resonance imaging (MRI) is generally performed to assess the extent of degeneration within the posterior tibial tendon, attenuation of medial soft tissue constraints, and degeneration of hindfoot and/or ankle articulations. The purpose of this study is to determine the incidence of lateral collateral ligament disease/injury associated with stages 2 and 3 adult-acquired flatfoot. The subjects were identified using a searchable computerized hospital database between 2015 and 2017. Stage 2 or 3 adult-acquired flatfoot deformity was confirmed in patients via chart review and MRI analysis. Lateral ankle ligament injury was confirmed using patient MRI results per the hospital radiologist and documented within the patients' chart. Inclusion criteria required that patients be diagnosed with Johnson and Strom stage 2 or 3 flatfoot deformity with documented lateral ankle pain and that preoperative MRI scans be available with the radiologist's report. Patient exclusion criteria included patients <18 years of age, patients with flatfoot deformity caused by previous trauma, tarsal coalition, neuropathic arthritis, patients with previous surgery, or patients with incomplete medical records. In total, 118 patients were identified with these parameters. Of the 118 patients, 74 patients (62.7%) had documented lateral ankle ligament injury on MRI. Of the 77 patients with stage 2 adult-acquired flatfoot, 55 (71.4%) had confirmed lateral ankle ligament injury on MRI. Of the 41 patients with stage 3 adult-acquired flatfoot, 19 (46.3%) had confirmed lateral ankle ligament injury on MRI. This study demonstrates a relatively high incidence of lateral ligament disease associated with adult-acquired flatfoot deformity. These findings might have long-term implications regarding ankle arthritis after surgical management of adult-acquired flatfoot.

Calcaneal lateral column lengthening osteotomy for symptomatic flexible flatfoot in children and adolescents: a systematic review. / Osteotomia de alongamento da coluna lateral do calcâneo para tratamento do pé plano flexível sintomático de crianças e adolescentes: revisão sistemática.

Flexible flatfoot is a common condition in small children, which shows a strong tendency to spontaneously correct with their growth or to become moderate or mild in adults, which will not cause future problems. However, in a small number of cases, this condition is more severe, does not improve spontaneously, which may cause mechanical impairment, deformity, and, eventually, pain. In such cases, surgical treatment should be considered. The aim of this systematic review was to evaluate the literature results on the treatment of the symptomatic flexible flatfoot in children or adolescents through a very frequent procedure: calcaneal lateral column lengthening osteotomy, A systematic electronic search in PubMed, Web of Science, Cochrane, CINAHL, SciELO, SCOPUS and LILACS databases was performed. We searched articles published between March 1975 and September 2016. After applying the eligibility criteria, the selected publications were evaluated in relation to their clinical and radiographic results and complications. We found 341 articles in the mentioned databases, but selected only eight studies, according to the inclusion and exclusion criteria. These studies included a total of 105 patients and 167 treated feet. Only three authors performed prospective studies, but without case-control or randomization. The majority of publications were descriptive studies or case series (level of evidence III or IV), with great methodological variations, but with a high satisfaction rate on the part of both patients and surgeons in relation to the results. However, more prospective and randomized studies are required, with adequate control groups and validated evaluation criteria.

O pé plano flexível é condição frequente na criança pequena e apresenta forte tendência para correção espontânea, ou tornar-se moderado ou leve no adulto, o que não causará problemas futuros. Entretanto, em uma pequena proporção de casos a deformidade é mais grave, não melhora, o que pode levar ao comprometimento do desempenho mecânico, deformidade e, eventualmente, dor. Nestes casos o tratamento cirúrgico deve ser considerado. O objetivo desta revisão sistemática foi avaliar os resultados da literatura no tratamento do pé plano flexível sintomático da criança ou adolescente por um procedimento bastante frequente que é a osteotomia de alongamento da coluna lateral do calcâneo. Foi realizada busca sistemática eletrônica nas bases de dados PubMed, Web of Science, Cochrane, CINAHL, SciELO, SCOPUS e LILACS por artigos publicados entre março de 1975 e setembro de 2016. Após aplicação dos critérios de elegibilidade, os artigos selecionados foram avaliados quanto aos resultados clínicos, radiográficos e complicações. Dos 341 artigos encontrados nas bases de dados, apenas oito estudos foram selecionados, segundo os critérios de inclusão e exclusão, com um total de 105 pacientes e 167 pés tratados. Somente três autores realizaram estudo prospectivo, mas sem caso controle ou aleatorização. A maioria das publicações no período avaliado é composta por estudos descritivos ou série de casos (nível de evidência III ou IV), com grandes variações metodológicas, mas com alto índice de satisfação dos pacientes e cirurgiões, em relação aos resultados. Entretanto, são necessárias pesquisas com desenho prospectivo, aleatorizado, grupo controle adequado e critérios de avaliação validados.

Combined Spring and Deltoid Ligament Repair in Adult-Acquired Flatfoot.

BACKGROUND: Adult-acquired flatfoot deformity (AAFD) is usually due to a combination of mechanical failure of the osteoligamentous complex that maintains the medial longitudinal arch of the foot and attenuation or complete tear of the posterior tibial tendon. Magnetic resonance imaging studies in patients with flatfoot deformities have reported the posterior tibial tendon to be pathologic in up to 100% of patients, the spring ligament in up to 87%, and the deltoid ligament in 33%. Many studies in the literature describe reconstruction of the spring ligament or the deltoid ligament associated with AAFD, but there is no study in which both (spring and deltoid) ligaments are reconstructed at the same time. We describe a novel technique to reconstruct the deltoid ligament and the spring ligament at the same time. METHODS: We described the technique and evaluated 10 consecutive patients with AAFD and insufficient ankle and midfoot ligaments. RESULTS: We found no postoperative complications, stiffness, or loss of correction. CONCLUSION: We present a novel technique to reconstruct the failed deltoid and spring ligament during flatfoot correction. It is unique in that it uses internal brace augmentation with FiberTape® to help and protect the soft tissue healing. LEVEL OF EVIDENCE: Level IV, retrospective case series.

Osteotomia de alongamento da coluna lateral do calcâneo para tratamento do pé plano flexível sintomático de crianças e adolescentes: revisão sistemática / Calcaneal lateral column lengthening osteotomy for symptomatic flexible flatfoot in children and adolescents: a systematic review

RESUMO O pé plano flexível é condição frequente na criança pequena e apresenta forte tendência para correção espontânea, ou tornar-se moderado ou leve no adulto, o que não causará problemas futuros. Entretanto, em uma pequena proporção de casos a deformidade é mais grave, não melhora, o que pode levar ao comprometimento do desempenho mecânico, deformidade e, eventualmente, dor. Nestes casos o tratamento cirúrgico deve ser considerado. O objetivo desta revisão sistemática foi avaliar os resultados da literatura no tratamento do pé plano flexível sintomático da criança ou adolescente por um procedimento bastante frequente que é a osteotomia de alongamento da coluna lateral do calcâneo. Foi realizada busca sistemática eletrônica nas bases de dados PubMed, Web of Science, Cochrane, CINAHL, SciELO, SCOPUS e LILACS por artigos publicados entre março de 1975 e setembro de 2016. Após aplicação dos critérios de elegibilidade, os artigos selecionados foram avaliados quanto aos resultados clínicos, radiográficos e complicações. Dos 341 artigos encontrados nas bases de dados, apenas oito estudos foram selecionados, segundo os critérios de inclusão e exclusão, com um total de 105 pacientes e 167 pés tratados. Somente três autores realizaram estudo prospectivo, mas sem caso controle ou aleatorização. A maioria das publicações no período avaliado é composta por estudos descritivos ou série de casos (nível de evidência III ou IV), com grandes variações metodológicas, mas com alto índice de satisfação dos pacientes e cirurgiões, em relação aos resultados. Entretanto, são necessárias pesquisas com desenho prospectivo, aleatorizado, grupo controle adequado e critérios de avaliação validados.

ABSTRACT Flexible flatfoot is a common condition in small children, which shows a strong tendency to spontaneously correct with their growth or to become moderate or mild in adults, which will not cause future problems. However, in a small number of cases, this condition is more severe, does not improve spontaneously, which may cause mechanical impairment, deformity, and, eventually, pain. In such cases, surgical treatment should be considered. The aim of this systematic review was to evaluate the literature results on the treatment of the symptomatic flexible flatfoot in children or adolescents through a very frequent procedure: calcaneal lateral column lengthening osteotomy, A systematic electronic search in PubMed, Web of Science, Cochrane, CINAHL, SciELO, SCOPUS and LILACS databases was performed. We searched articles published between March 1975 and September 2016. After applying the eligibility criteria, the selected publications were evaluated in relation to their clinical and radiographic results and complications. We found 341 articles in the mentioned databases, but selected only eight studies, according to the inclusion and exclusion criteria. These studies included a total of 105 patients and 167 treated feet. Only three authors performed prospective studies, but without case-control or randomization. The majority of publications were descriptive studies or case series (level of evidence III or IV), with great methodological variations, but with a high satisfaction rate on the part of both patients and surgeons in relation to the results. However, more prospective and randomized studies are required, with adequate control groups and validated evaluation criteria.

Effects of Medial Displacement Calcaneal Osteotomy and Calcaneal Z Osteotomy on Subtalar Joint Pressures: A Cadaveric Flatfoot Model.

Medial displacement calcaneal osteotomies have been shown to be successful in the surgical management of adult acquired flatfoot, in particular, stage 2 deformity. Classically, the medial displacement calcaneal osteotomy technique has been performed. However, a calcaneal Z osteotomy has been more recently described and applied in the surgical management of flatfoot deformity. Although the potential advantages of the calcaneal Z technique have been reported, data on its effect on the subtalar joint are lacking. A validated flatfoot model was induced in 8 cadaveric feet that had been randomly assigned to either medial displacement calcaneal osteotomy (n = 4) or calcaneal Z osteotomy (n = 4). The feet were loaded through the tibia with a constant ground reaction force of 400 N, with a simultaneous increase in the Achilles tendon force to 300 or 500 N. The subtalar joint pressures were recorded before and after osteotomy. We did not detect any statistically significant differences between the 2 techniques in terms of their effects on subtalar joint pressure.

Mid-Calcaneal Length After Evans Calcaneal Osteotomy: A Retrospective Comparison of Wedge Locking Plates and Tricortical Allograft Wedges.

Evans calcaneal osteotomy remains a cornerstone in the correction of the flexible flatfoot. Although multiple techniques have been used to maintain the length of the lateral column, a low profile wedge locking plate was recently introduced as an alternative to the traditional tricortical allograft wedge. We hypothesized that the wedge locking plate would better maintain the mid-calcaneal length compared with the tricortical allograft wedge. To test this hypothesis, after Evans osteotomy, the mid-calcaneal length was measured in the immediate postoperative period and again at 3 and 6 months. A total of 24 patients met the inclusion criteria. The mean patient age was 48.1 years (range 11 to 66). Of the 24 patients, 9 (37.5%) were treated with a tricortical allograft wedge and 15 (62.5%) with a wedge locking plate. At 3 months postoperatively, the mean decrease in mid-calcaneal length was similar for the tricortical allograft wedge group (1.3 ± 1.9 mm) and the wedge locking plate group (0.5 ± 0.9 mm, p = .275). At 6 months postoperatively, however, the mean decrease in mid-calcaneal length was greater for the tricortical allograft wedge group (2.8 ± 1.7 mm) than for the wedge locking plate group (0.6 ± 0.7 mm, p = .004). The 2 groups demonstrated a similar incidence of dorsally displaced distal calcaneal fragments throughout the study endpoint (p ≥ .052). These results suggest that the wedge locking plate better maintains the mid-calcaneal length over time compared with the tricortical allograft wedge.

Arthrodiastasis of the lateral column with medial fusion: a retrospective examination of medial double and Lapidus arthrodeses.

Arthrodiastasis of the calcaneocuboid joint after medial double arthrodesis has been described, but the extent remains unreported. We present our comparative findings after medial double and Lapidus fusion on the effects of the calcaneocuboid joint. Adults undergoing medial column fusion with internal fixation and a minimal clinical and radiographic follow-up period of 3 months were included. Subjects were excluded for Charcot deformity, previous arthrodesis surgery, and history of calcaneocuboid joint trauma or surgery. Although 52 patients were identified, 32 (mean age 56.69 ± 12.56 years; 11 males) met the study criteria (15 medial double and 17 Lapidus procedures). The height of the calcaneocuboid joint on the lateral radiograph and width of the calcaneocuboid joint on the anteroposterior radiograph were measured postoperatively and fixed, given the overlap often noted preoperatively in flatfoot deformities. The joint depth was measured at 3 points and averaged both preoperatively and postoperatively on lateral and anteroposterior radiographs. The volume of the calcaneocuboid joint (mm(3)) was the primary endpoint. Medial column fusion elicited a statistically significant mean increase of 32% in calcaneocuboid joint diastasis (p < .001). The percent change in diastasis volume was statistically different between the medial double (61.90% ± 40.59%) and the Lapidus (5.71% ± 14.84%, p < .001) fusion procedures. These results confirmed our hypothesis that arthrodesis of the more proximal medial column joints would produce greater lateral column arthrodiastasis. Adding to the published data, medial double arthrodesis increased the volume of the calcaneocuboid joint by 62%.

Calcaneal "Z" osteotomy effect on hindfoot varus after triple arthrodesis in a cadaver model.

BACKGROUND: Triple arthrodesis involves subtalar, talonavicular, and calcaneocuboid joint fusion and is performed to relieve pain and correct deformity. Complications include malunion resulting in equinovarus and lateral column overload, which can lead to painful callosities and stress fractures. This study quantified the effectiveness of a closing-wedge calcaneal "Z" osteotomy for correction of the varus condition and reduction of abnormal loading of the lateral border of the foot. METHODS: Ten fresh-frozen feet were used. Angle meters were attached to the calcaneus and second cuneiform to measure hindfoot and midfoot varus, and pressure sensors were placed under the first and fifth metatarsal heads to document loading of the borders of the foot. Tensile loads were applied to ten extrinsic tendons and the Achilles tendon while an 1187 N axial foot load was applied. Calcaneus and second cuneiform coronal plane angles and medial and lateral plantar pressures were measured initially, after triple fusion-induced varus, and after "Z" osteotomy. RESULTS: The calcaneal "Z" osteotomy had no significant corrective effect, with hindfoot alignment virtually identical before and after the procedure under the described foot loading conditions. Similarly, second cuneiform inclination, representative of midfoot alignment, showed no change from the osteotomy. Medial and lateral peak plantar pressures after calcaneal "Z" osteotomy did not differ from those measured after varus triple fusion. CONCLUSION: In this cadaver model of varus malunited triple arthrodesis, the closing-wedge calcaneal "Z" osteotomy was ineffective for correction of bone alignment and lateral forefoot overloading under the tested conditions. CLINICAL RELEVANCE: The results provide additional information on which to base treatment after triple arthrodesis with varus malunion.

Técnica calcáneo-stop con elongación de tendones peroneos en el pie plano de pacientes con parálisis cerebral infantil / Calcaneal-stop technique with lengthening of the peroneal tendons in the flat foot of infant cerebral palsy patients

Introducción: los pies planos del niño constituyen un motivo de gran preocupación por los padres, probablemente el más frecuente de consulta en ortopedia infantil. Objetivos: evaluar la técnica calcáneo-stop con elongación de los tendones peroneos en el tratamientodel pie plano paralítico de paciente con parálisis cerebral infantil. Métodos: se realizó un estudio de intervención, prospectivo y autopareado, que incluyó nueve pacientes con edad entre 4-14 años intervenidos quirúrgicamente, en el periodo comprendido entre el 1 de septiembre de 2011 y 31 de agosto de 2012, en el Complejo Científico Ortopédico Internacional Frank País. Resultados: predominaron los pacientes del sexo masculino (66,6 por ciento), entre 4-9 años (55,6 por ciento), color de la piel blanca (100,0 por ciento) y con ambos miembros afectados (100 por ciento). Todos los pacientes se caracterizaron por compromiso funcional, grado de afección III o IV del plantigrama y parámetros radiográficos de severidad. En el posoperatorio se obtuvo una reducción significativa del grado de afección (de 100 por ciento con grado III o IV a 66,7 por ciento con plantígrada normal y ninguno con grado III o IV; p< 0,001) y mejoría de los parámetros radiográficos (ángulo de Moreau-Costa-Bartani [MCB]: 146 ± 11(0) vs 129 ± 7(0); p< 0,001 y ángulo astrágalo-calcáneo: 33 ± 4(0) vs 24±4(0); p< 0,001). Las complicaciones fueron todas menores y en una pequeña proporción de los pacientes (n= 3; 33,4 por ciento). El grado de satisfacción de los padres y el buen resultado quirúrgico de la técnica fueron elevados. Conclusiones: la técnica calcáneo-stop con elongación de los tendones peroneos es una buena opción terapéutica en pacientes con parálisis cerebral infantil y pie plano, por sus escasas complicaciones y buenos resultados quirúrgicos(AU)

Introduction: flat foot of the child is a great concern for the parents and the most frequent reason to go to the pediatric orthopedist's. Objectives: to evaluate the calcaneal-stop technique with lengthening of the peroneal tendons in treating the flat foot of infant cerebral palsy patient. Methods: a prospective, self-paired and intervention study was conducted in nine patients aged 4 to 14 years, who were operated on in the period of September 1st 2011 through August 31st 2012 in Frank Pais international scientific orthopedic complex center. Results: males (66.6 percent), 4-9 years-olds (55.6 percent), Caucasians (100 percent) and both limbs affected (100 percent) prevailed. All the patients presented functional compromise, degree III or IV in the plantigram and radiographic indicators for severity. In the postoperative period, there was significant reduction of the degree of disease (from 100 percent with degree III or IV to 66.7 percent with normal plantigrade and none of them with grade III or IV p< 0.001) and better radiographic indicators (Moreau-Costa-Bartani angle (MCB): 146 ± 110 vs 129 ± 70; p< 0.001) and astragalus-calcaneal angle: 33 ± 40 vs 24 ± 40; p< 0,001). Minor complications were observed in a small portion of patients (n= 3 for 33.4 percent). The level of satisfaction of the parents was high and the surgical result of this procedure was very good. Conclusions: the calcaneal-stop technique with lengthening of the peroneal tendons is a good therapeutic choice for patients with infant cerebral palsy and flat foot because of minor complications and good surgical results(AU)

Técnica calcáneo-stop con elongación de tendones peroneos en el pie plano de pacientes con parálisis cerebral infantil / Technique calcaneo-stop par élongation des tendons péroniers du pied plat chez les patients atteints de paralyse cérébrale infantile / Calcaneal-stop technique with lengthening of the peroneal tendons in the flat foot of infant cerebral palsy patients

Introducción: los pies planos del niño constituyen un motivo de gran preocupación por los padres, probablemente el más frecuente de consulta en ortopedia infantil. Objetivos: evaluar la técnica calcáneo-stop con elongación de los tendones peroneos en el tratamientodel pie plano paralítico de paciente con parálisis cerebral infantil. Métodos: se realizó un estudio de intervención, prospectivo y autopareado, que incluyó nueve pacientes con edad entre 4-14 años intervenidos quirúrgicamente, en el periodo comprendido entre el 1 de septiembre de 2011 y 31 de agosto de 2012, en el Complejo Científico Ortopédico Internacional Frank País. Resultados: predominaron los pacientes del sexo masculino (66,6 por ciento), entre 4-9 años (55,6 por ciento), color de la piel blanca (100,0 por ciento) y con ambos miembros afectados (100 por ciento). Todos los pacientes se caracterizaron por compromiso funcional, grado de afección III o IV del plantigrama y parámetros radiográficos de severidad. En el posoperatorio se obtuvo una reducción significativa del grado de afección (de 100 por ciento con grado III o IV a 66,7 por ciento con plantígrada normal y ninguno con grado III o IV; p< 0,001) y mejoría de los parámetros radiográficos (ángulo de Moreau-Costa-Bartani [MCB]: 146 ± 11(0) vs 129 ± 7(0); p< 0,001 y ángulo astrágalo-calcáneo: 33 ± 4(0) vs 24±4(0); p< 0,001). Las complicaciones fueron todas menores y en una pequeña proporción de los pacientes (n= 3; 33,4 por ciento). El grado de satisfacción de los padres y el buen resultado quirúrgico de la técnica fueron elevados. Conclusiones: la técnica calcáneo-stop con elongación de los tendones peroneos es una buena opción terapéutica en pacientes con parálisis cerebral infantil y pie plano, por sus escasas complicaciones y buenos resultados quirúrgicos(AU)

Introduction: flat foot of the child is a great concern for the parents and the most frequent reason to go to the pediatric orthopedist's. Objectives: to evaluate the calcaneal-stop technique with lengthening of the peroneal tendons in treating the flat foot of infant cerebral palsy patient. Methods: a prospective, self-paired and intervention study was conducted in nine patients aged 4 to 14 years, who were operated on in the period of September 1st 2011 through August 31st 2012 in Frank Pais international scientific orthopedic complex center. Results: males (66.6 percent), 4-9 years-olds (55.6 percent), Caucasians (100 percent) and both limbs affected (100 percent) prevailed. All the patients presented functional compromise, degree III or IV in the plantigram and radiographic indicators for severity. In the postoperative period, there was significant reduction of the degree of disease (from 100 percent with degree III or IV to 66.7 percent with normal plantigrade and none of them with grade III or IV p< 0.001) and better radiographic indicators (Moreau-Costa-Bartani angle (MCB): 146 ± 110 vs 129 ± 70; p< 0.001) and astragalus-calcaneal angle: 33 ± 40 vs 24 ± 40; p< 0,001). Minor complications were observed in a small portion of patients (n= 3 for 33.4 percent). The level of satisfaction of the parents was high and the surgical result of this procedure was very good. Conclusions: the calcaneal-stop technique with lengthening of the peroneal tendons is a good therapeutic choice for patients with infant cerebral palsy and flat foot because of minor complications and good surgical results(AU)

Introduction: le pied plat chez l'enfant constitue une préoccupation pour les parents, et c'est probablement l'affection la plus fréquemment traitée aux services d'orthopédie infantile. Objectifs: le but de cette étude est d'évaluer la technique calcaneo-stop par élongation des tendons péroniers dans le traitement du pied plat du patient atteint de paralyse cérébrale infantile. Méthodes: une étude interventionnelle, prospective et auto-comparée de neuf patients âgés de 4 à 14 ans, traités chirurgicalement entre le 1e septembre 2011 et le 31 août 2012 au Complexe scientifique international d'orthopédie Frank Pais, a été réalisée. Résultats: on a trouvé que les patients du sexe masculin (66.6 pourcent), blancs (100.0 pourcent), âgés de 4-9 ans (55.6 pourcent) et avec une affection bilatérale (100.0 pourcent) étaient en prédominance. Tous les patients ont montré un trouble du fonctionnement, grade III ou IV en plantigrade, et des paramètres radiographiques de sévérité. Dans l'étape postopératoire, il y a eu une réduction significative du grade de l'affection (100 de grade III ou IV à 66.7 pourcent en plantigrade normale, et 0 pourcent de grade III ou IV ; (p< 0.001), et une amélioration des paramètres radiographiques (angle de Moreau-Costa-Bartani (MCB): 146 ± 11° vs. 129 ± 7°; p< 0.001, et angle astragalo-calcanéen: 33 ± 4° vs. 24 ± 4° ; p< 0.001). Le taux de complications a été faible, et la proportion de patients affectés insignifiante (n= 3; 33.4 pourcent). Le degré de satisfaction des parents et les bons résultats de la technique chirurgicale ont été élevés. Conclusions: dû à son faible taux de complications et à ses très bons résultats chirurgicaux, la technique calcaneo-stop par élongation des tendons péroniers s'érige comme traitement de choix pour les patients atteints de paralyse cérébrale infantile et de pied plat(AU)