RESUMO

Introduction: Radial head fractures are consistently part of a terrible triad of the elbow and can occur in association with Monteggia fracture-dislocations, transolecranon fractures, and their variations. Understanding the degree of comminution of the radial head fracture and the location of fragments determines the course of action to be taken. Objectives: To correlate fracture-dislocations with the pattern of radial head fracture (number of fragments) and involvement in the proximal radioulnar region. Materials and Methods: A retrospective study (level II) of patients undergoing surgery for radial head fractures associated with fracture-dislocations. Patients had radiographs in anteroposterior and lateral views, as well as tomography. The number of radial head fracture fragments and the presence of fractures in the proximal radioulnar region were correlated with the type of fracture-dislocation and demographic variables. Conclusion: Elbow fracture-dislocation types could not predict the number of fragments and the location of radial head fractures. However, most injuries presented three or more fragments in the radial head, and many had involvement of the proximal radioulnar region, suggesting high-energy trauma. Level of Evidence II; Retrospective Study.

Introdução: As fraturas da cabeça do rádio estão sempre presentes em uma tríade terrível do cotovelo e podem ocorrer associadas a uma fratura-luxação de Monteggia, fratura transolecraniana e suas variações. Conhecer o grau de cominuição da fratura da cabeça do rádio e a localização dos fragmentos determinam a conduta a ser tomada. Objetivos: Correlacionar as fraturas-luxações com o padrão da fratura da cabeça do rádio (número de fragmentos) e o acometimento na região radioulnar proximal. Material e Métodos: Estudo retrospectivo (nível II) de pacientes submetidos a cirurgia devido fraturas de cabeça de rádio associadas às fraturas-luxações. Os pacientes possuíam radiografia nas incidências anteroposterior e perfil e tomografia. O número de fragmentos da fratura da cabeça do rádio e a presença de fratura na região radioulnar proximal foram correlacionadas com o tipo de fratura-luxação e as varáveis demográficas. Conclusão: Os tipos de fratura-luxação do cotovelo não foram capazes de predizer o número de fragmentos e a localização da fratura da cabeça do rádio. Entretanto, a maioria das lesões apresentaram três ou mais fragmentos na cabeça do rádio e muitos apresentaram acometimento da região da radioulnar proximal sugerindo traumas de alta energia. Nível de Evidência II; Estudo Retrospectivo.

RESUMO

ABSTRACT Introduction: Radial head fractures are consistently part of a terrible triad of the elbow and can occur in association with Monteggia fracture-dislocations, transolecranon fractures, and their variations. Understanding the degree of comminution of the radial head fracture and the location of fragments determines the course of action to be taken. Objectives: To correlate fracture-dislocations with the pattern of radial head fracture (number of fragments) and involvement in the proximal radioulnar region. Materials and Methods: A retrospective study (level II) of patients undergoing surgery for radial head fractures associated with fracture-dislocations. Patients had radiographs in anteroposterior and lateral views, as well as tomography. The number of radial head fracture fragments and the presence of fractures in the proximal radioulnar region were correlated with the type of fracture-dislocation and demographic variables. Conclusion: Elbow fracture-dislocation types could not predict the number of fragments and the location of radial head fractures. However, most injuries presented three or more fragments in the radial head, and many had involvement of the proximal radioulnar region, suggesting high-energy trauma. Level of Evidence II; Retrospective Study.

RESUMO Introdução: As fraturas da cabeça do rádio estão sempre presentes em uma tríade terrível do cotovelo e podem ocorrer associadas a uma fratura-luxação de Monteggia, fratura transolecraniana e suas variações. Conhecer o grau de cominuição da fratura da cabeça do rádio e a localização dos fragmentos determinam a conduta a ser tomada. Objetivos: Correlacionar as fraturas-luxações com o padrão da fratura da cabeça do rádio (número de fragmentos) e o acometimento na região radioulnar proximal. Material e Métodos: Estudo retrospectivo (nível II) de pacientes submetidos a cirurgia devido fraturas de cabeça de rádio associadas às fraturas-luxações. Os pacientes possuíam radiografia nas incidências anteroposterior e perfil e tomografia. O número de fragmentos da fratura da cabeça do rádio e a presença de fratura na região radioulnar proximal foram correlacionadas com o tipo de fratura-luxação e as varáveis demográficas. Conclusão: Os tipos de fratura-luxação do cotovelo não foram capazes de predizer o número de fragmentos e a localização da fratura da cabeça do rádio. Entretanto, a maioria das lesões apresentaram três ou mais fragmentos na cabeça do rádio e muitos apresentaram acometimento da região da radioulnar proximal sugerindo traumas de alta energia. Nível de Evidência II; Estudo Retrospectivo.

RESUMO

Objective To evaluate the functional results of patients submitted to a surgical approach for the treatment of the terrible triad of the elbow, analyzing the treatment methods used and associated epidemiological variables. Methods Patients who underwent surgical treatment for the terrible triad of the elbow from February 2018 to June 2020 at our service were evaluated. The identified sample consisted of 17 patients, but of these, only 13 completed all stages of the study and, therefore, were considered as the universe to be considered. Epidemiological information of interest was collected: age, sex, hand of dominance, affected side, characteristics and classification of injuries, trauma mechanism, time to surgery, type of procedure performed and range of motion. The Mason classification was used for radial head fractures and the Regan and Morrey classification for the coronoid process. In order to perform a functional analysis, the DASH and BRUCE questionnaires were applied. Results About 77% of the patients were male, 92% of the fracture mechanisms were due to high-energy trauma. Contrary to this, the predominance of the non-dominant side was observed as the most affected. Evaluating the results according to the time to start the treatment, the patients operated within 14 days had statistically better functional results. Conclusion Surgical treatment of TTIE generates acceptable functional results in most cases. The success of the treatment is related to the time interval between the trauma and the first surgery, in addition to the severity of the injuries.

RESUMO

Monteggia fracture-dislocations are rare injuries, affecting about 2-5% of the population. Jesse Jupiter subdivided Bado's Type II fractures into four types, all of which presented an associated radial head fracture. Associated chondral and ligament injuries can evolve with postoperative complications. Objective: To evaluate the incidence of complications and risk factors that may influence the postoperative outcomes of Jupiter lesions. Methods: This retrospective study was conducted with surgically treated patients. The characteristics related to fractures and surgical approaches were evaluated and these variables were correlated with radiographic and functional postoperative complications. Results: A total of 15 patients were evaluated, mostly men and with a higher prevalence of Types IIA and IID. The most frequent complications were heterotopic ossification and osteolysis around the radial head prosthesis. Postoperative instability occurred only in the lateral collateral ligament. According to MEPS functional score, 53% of the patients evolved with unfavorable outcomes. Conclusion: The studied cases evolved with high rates of postoperative complications, mainly in Jupiter's Type IID fractures and associated coronoid fractures. Level of Evidence III, Therapeutic Study.

A fratura-luxação de Monteggia é uma lesão rara que acomete cerca de 2-5% da população. Jesse Jupiter subdividiu as fraturas tipo II de Bado em quatro tipos, todos eles associados à fratura da cabeça do rádio. As lesões condral e ligamentares associadas podem evoluir com complicações pós-operatórias. Objetivo: Avaliar a incidência das complicações e os fatores de risco que podem influenciar os resultados pós-operatórios nas fraturas de Monteggia tipo II de Jupiter. Métodos: Estudo retrospectivo com pacientes tratados cirurgicamente. Avaliaram-se as características relacionadas às fraturas e as técnicas cirúrgicas utilizadas e, em seguida, tais variáveis foram correlacionadas com complicações pós-operatórias radiográficas e funcionais. Resultados: Foram avaliados 15 pacientes, havendo predomínio do sexo masculino e maior prevalência das fraturas tipo IIA e IID. As complicações mais frequentes foram a ossificação heterotópica e a osteólise ao redor da prótese da cabeça do rádio. A instabilidade pós-operatória ocorreu somente no complexo ligamentar lateral. Funcionalmente, segundo o Mayo Elbow Performance Score, 53% dos pacientes evoluíram com resultados desfavoráveis. Conclusão: Observou-se alta taxa de complicação pós-operatória, principalmente nas fraturas tipo II-D de Jupiter e naquelas com fratura do coronoide associada. Nível de Evidência III, Estudo Terapêutico.

RESUMO

PURPOSE: The purpose of this study was to evaluate implant survivorship and clinical outcomes following radial head arthroplasty for fracture at long-term follow-ups. METHODS: A retrospective analysis was conducted on adult patients who underwent primary uncemented radial head arthroplasty for radial head or neck fractures between 2012 and 2015. Medical records were reviewed to collect information regarding demographics, injury characteristics, reoperations, and revisions requiring implant removal. A bivariate analysis was conducted to identify potential risk factors for reoperation. A Kaplan-Meier curve was created to determine implant survival rates. Eligible patients were contacted to confirm any reoperations and obtain Quick Disability of the Arm, Shoulder, and Hand scores at long-term follow-ups. RESULTS: A total of 89 patients were eligible for analysis and assessed at a mean of 97 months after surgery (range, 81-128). Reoperation rate was 16% (14 of 89 patients), including 5% of patients requiring implant removal or revision. However, 93% of reoperations occurred within the first 12 months of the index surgery. Fracture dislocations of the elbow had a higher rate of reoperation. A Kaplan-Meier curve demonstrated an implant survival rate of 96% at 10-year follow-up. Of the patients who responded, the mean Quick Disability of the Arm, Shoulder, and Hand score was 8.7 ± 10.3, with none requiring additional reoperations or revisions. There were otherwise similar outcome scores among patients requiring reoperation versus those who did not. CONCLUSIONS: Although radial head arthroplasty for fractures has a high potential for reoperation within the first year, survival rates with uncemented implants remain high at 10 years, and patients report excellent Quick Disability of the Arm, Shoulder, and Hand scores at long-term follow-ups, despite any need for reoperation. Fractures with associated elbow dislocation may be at a higher risk for reoperation, and it is important to provide this prognostic information to patients who are likely to require arthroplasty for more extensive injuries. TYPE OF STUDY/LEVEL OF EVIDENCE: Therapeutic IV.

RESUMO

ABSTRACT Monteggia fracture-dislocations are rare injuries, affecting about 2-5% of the population. Jesse Jupiter subdivided Bado's Type II fractures into four types, all of which presented an associated radial head fracture. Associated chondral and ligament injuries can evolve with postoperative complications. Objective: To evaluate the incidence of complications and risk factors that may influence the postoperative outcomes of Jupiter lesions. Methods: This retrospective study was conducted with surgically treated patients. The characteristics related to fractures and surgical approaches were evaluated and these variables were correlated with radiographic and functional postoperative complications. Results: A total of 15 patients were evaluated, mostly men and with a higher prevalence of Types IIA and IID. The most frequent complications were heterotopic ossification and osteolysis around the radial head prosthesis. Postoperative instability occurred only in the lateral collateral ligament. According to MEPS functional score, 53% of the patients evolved with unfavorable outcomes. Conclusion: The studied cases evolved with high rates of postoperative complications, mainly in Jupiter's Type IID fractures and associated coronoid fractures. Level of Evidence III, Therapeutic Study.

RESUMO A fratura-luxação de Monteggia é uma lesão rara que acomete cerca de 2-5% da população. Jesse Jupiter subdividiu as fraturas tipo II de Bado em quatro tipos, todos eles associados à fratura da cabeça do rádio. As lesões condral e ligamentares associadas podem evoluir com complicações pós-operatórias. Objetivo: Avaliar a incidência das complicações e os fatores de risco que podem influenciar os resultados pós-operatórios nas fraturas de Monteggia tipo II de Jupiter. Métodos: Estudo retrospectivo com pacientes tratados cirurgicamente. Avaliaram-se as características relacionadas às fraturas e as técnicas cirúrgicas utilizadas e, em seguida, tais variáveis foram correlacionadas com complicações pós-operatórias radiográficas e funcionais. Resultados: Foram avaliados 15 pacientes, havendo predomínio do sexo masculino e maior prevalência das fraturas tipo IIA e IID. As complicações mais frequentes foram a ossificação heterotópica e a osteólise ao redor da prótese da cabeça do rádio. A instabilidade pós-operatória ocorreu somente no complexo ligamentar lateral. Funcionalmente, segundo o Mayo Elbow Performance Score, 53% dos pacientes evoluíram com resultados desfavoráveis. Conclusão: Observou-se alta taxa de complicação pós-operatória, principalmente nas fraturas tipo II-D de Jupiter e naquelas com fratura do coronoide associada. Nível de Evidência III, Estudo Terapêutico.

RESUMO

Abstract Objective To evaluate the functional results of patients submitted to a surgical approach for the treatment of the terrible triad of the elbow, analyzing the treatment methods used and associated epidemiological variables. Methods Patients who underwent surgical treatment for the terrible triad of the elbow from February 2018 to June 2020 at our service were evaluated. The identified sample consisted of 17 patients, but of these, only 13 completed all stages of the study and, therefore, were considered as the universe to be considered. Epidemiological information of interest was collected: age, sex, hand of dominance, affected side, characteristics and classification of injuries, trauma mechanism, time to surgery, type of procedure performed and range of motion. The Mason classification was used for radial head fractures and the Regan and Morrey classification for the coronoid process. In order to perform a functional analysis, the DASH and BRUCE questionnaires were applied. Results About 77% of the patients were male, 92% of the fracture mechanisms were due to high-energy trauma. Contrary to this, the predominance of the non-dominant side was observed as the most affected. Evaluating the results according to the time to start the treatment, the patients operated within 14 days had statistically better functional results. Conclusion Surgical treatment of TTIE generates acceptable functional results in most cases. The success of the treatment is related to the time interval between the trauma and the first surgery, in addition to the severity of the injuries.

Resumo Objetivo Avaliar os resultados funcionais dos pacientes submetidos a abordagem cirúrgica para o tratamento da tríade terrível do cotovelo, analisando os métodos de tratamento utilizados e variáveis epidemiológicas associadas. Métodos Foram avaliados pacientes submetidos aotratamento cirúrgico de tríade terrível do cotovelo de fevereiro de 2018 a junho de 2020 em nosso serviço. A amostra identificada foi de 17 pacientes, mas destes apenas 13 concluíram todas as etapas das pesquisas e por isso foram considerados como o universo a ser levado em consideração. Coletou-se informações epidemiológicas de interesse: idade, sexo, dominância, lado acometido, características e classificações das lesões, mecanismo do trauma, tempo para cirurgia, tipo de procedimento realizado e o arco de movimento. Foi utilizada a classificação de Mason para a fratura de cabeça do rádio e a de Regan e Morrey, para o processo coronoide. A fim de realizar uma análise funcional, aplicou-se os questionários de DASH e BRUCE. Resultados Cerca de 77% dos pacientes foram do sexo masculino, 92% dos mecanismos de fratura foram por trauma de alta energia. Contrariamente a esta, observou-se a predominância do lado não dominante como o mais afetado. Avaliando os resultados de acordo com o tempo para início do tratamento, os pacientes operados em até 14 dias obtiveram resultados funcionais estatisticamente melhores. Conclusão O tratamento cirúrgico da TTC gera resultados funcionais aceitáveis na maioria dos casos. O sucesso do tratamento está relacionado ao intervalo de tempo entre o trauma e a primeira cirurgia, além de se relacionar com a gravidade das lesões.

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Steel syndrome was initially described by H. H. Steel in 1993 in Puerto Rico, at which time he described the clinical findings required for diagnosis. The responsible gene, COL27A1, was identified in 2015 (Gonzaga-Jauregui et al., European Journal of Human Genetics, 2015;23:342-346). Eleven patients have previously been described with Steel syndrome and homozygous COL27A1 mutations, with eight having an apparent founder mutation, p.Gly697Arg. We describe three more patients identified at Einstein Medical Center Philadelphia and St. Christopher's Hospital for Children (Philadelphia, PA) diagnosed with Steel syndrome. All three are of Puerto Rican ancestry with the previously described founder mutation and had either hip dislocations or hip dysplasia. Radial head dislocation was only identified in one patient while short stature and scoliosis were noted in two of these patients. There are now 51 patients in the literature with Steel syndrome, including the 3 patients in this article, and 14 patients with a genetically confirmed Steel syndrome diagnosis.

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INTRODUCTION: The objective of this study is to assess the type, frequency and severity of complications after the implantation of the modular monopolar radial head prosthesis. MATERIAL AND METHODS: Forty-seven patients with 48 radial head prostheses implanted between 2009 and 2017 were reviewed retrospectively. Patients were evaluated clinical and radiographically for a mean follow-up of 43.55 months (range: 12-89). RESULTS: The same type of prosthesis was implanted in every patient (Ascension Modular Radial Head). The average score in the Mayo Elbow Performance Score was 88.29 ± 9.9 points. During the follow-up, three patients (6.25%) suffered from continuous pain. Twelve cases (25.5%) showed radiological oversizing, though only five were symptomatic. Heterotopic ossification was detected in twenty-seven cases (57.4%). Eleven patients (23.4%) developed postoperative stiffness. Nineteen cases (40.42%) showed periprosthetic osteolysis, from which seven were symptomatic. Thirteen patients (27%) developed surgery-related complications: three cases of infection, four cases of symptomatic loosening, two neurapraxies, one instability and three cases of oversizing with associated stiffness. Nine patients (18.75%) required reintervention. DISCUSSION: Our study obtains a 27% of overall complications, mostly related to oversizing and prosthetic loosening, and 19% of reinterventions. These results are similar to those presented in previous studies, with variations depending on the time of follow-up. Further research is also required to evaluate long-term results and the potential progression of the radiographic findings. CONCLUSION: Taken together, these data stress the need for improvement in both the surgical technique and the design of the implants.

INTRODUCCIÓN: El objetivo de este estudio es evaluar el tipo, la frecuencia y la gravedad de las complicaciones después de la implantación de la prótesis monopolar modular de cabeza radial. MATERIAL Y MÉTODOS: Se revisaron retrospectivamente 47 pacientes con 48 prótesis de cabeza radial implantadas entre 2009 y 2017 durante una media de 43.55 meses (rango: 12-89). RESULTADOS: Se implantó el mismo tipo de prótesis en cada paciente (Ascension Modular Radial Head). La puntuación media obtenida en la clasificación Mayo Elbow Performance Score fue de 88.29 ± 9.9 puntos. Durante el seguimiento tres pacientes (6.25%) sufrieron dolor continuo. Doce casos (25.5%) mostraron sobredimensión radiológica, aunque sólo cinco fueron sintomáticos. Se detectó osificación heterotópica en 27 casos (57.4%), 11 pacientes (23.4%) desarrollaron rigidez postoperatoria, 19 casos (40.42%) mostraron osteólisis periprotésica, de los cuales siete fueron sintomáticos, 13 pacientes (27%) presentaron complicaciones: tres casos de infección, cuatro casos de aflojamiento sintomático, dos neuroapraxias, una inestabilidad y tres casos de sobredimensionamiento con rigidez asociada. Nueve pacientes (18.75%) fueron reintervenidos. DISCUSIÓN: Presentamos 27% de complicaciones globales, principalmente relacionadas con la sobredimensión y el aflojamiento protésico y 19% de reintervenciones. Estos resultados son similares a los descritos en estudios previos con variaciones en función del tiempo de seguimiento. Asimismo, se requieren nuevos estudios para evaluar los resultados a largo plazo y la posible progresión de los hallazgos radiográficos. CONCLUSIÓN: En conjunto, estos datos ponen de manifiesto la necesidad de mejoría tanto de la técnica quirúrgica como del diseño de los implantes.

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RESUMO

INTRODUCTION: Congenital dislocation of the Radial head is a condition that has been described in a few cases in the international literature, the anterior and lateral dislocation were the less frequent forms of presentation with 15% of cases, each, and the posterior dislocation the most frequent with 70% of the total cases reported. However, this pathology is considered the most frequent congenital pathology of the elbow in children. The present study describes the case of a patient with congenital dislocation of elbow anterior variety and another case with dislocation lateral variety, both diagnosed at an early age, in which it has been decided for conservative management and an annual follow-up. A bibliographic review of the subject is also carried out. DISCUSSION: The congenital elbow dislocation usually has a benign evolution, being painless and not very limiting for the patient, so it can be managed conservatively. Pain and limited movement are indicative of surgical treatment. There are multiple surgical treatments for this entity, however they are not widely accepted due to the complications and poor results presented by them.

INTRODUCCIÓN: La luxación congénita de cabeza radial es un padecimiento que se ha descrito en contados casos en la literatura internacional, siendo la luxación anterior y lateral las formas de presentación menos frecuentes con 15% de los casos cada una y la luxación posterior la más frecuente con 70% del total de los casos reportados. Sin embargo, esta patología es considerada la patología congénita más frecuente del codo en el niño. Se presenta el caso de un paciente con luxación congénita de codo variedad anterior y otro caso con luxación variedad lateral, ambos diagnosticados a temprana edad, en los que se decidió realizar un manejo conservador y un seguimiento anual. Asimismo, se hizo una revisión bibliográfica del tema. DISCUSIÓN: La luxación congénita de codo tiene por lo general una evolución benigna, siendo indolora y poco limitante para el paciente, por lo que puede ser manejada de manera conservadora. El dolor y la limitación de movimientos son indicativos de un tratamiento quirúrgico; sin embargo, no son ampliamente aceptados debido a las complicaciones y resultados deficientes que presentan.

Assuntos

RESUMO

Resumen: Introducción: El objetivo de este estudio es evaluar el tipo, la frecuencia y la gravedad de las complicaciones después de la implantación de la prótesis monopolar modular de cabeza radial. Material y métodos: Se revisaron retrospectivamente 47 pacientes con 48 prótesis de cabeza radial implantadas entre 2009 y 2017 durante una media de 43.55 meses (rango: 12-89). Resultados: Se implantó el mismo tipo de prótesis en cada paciente (Ascension Modular Radial Head) . La puntuación media obtenida en la clasificación Mayo Elbow Performance Score fue de 88.29 ± 9.9 puntos. Durante el seguimiento tres pacientes (6.25%) sufrieron dolor continuo. Doce casos (25.5%) mostraron sobredimensión radiológica, aunque sólo cinco fueron sintomáticos. Se detectó osificación heterotópica en 27 casos (57.4%), 11 pacientes (23.4%) desarrollaron rigidez postoperatoria, 19 casos (40.42%) mostraron osteólisis periprotésica, de los cuales siete fueron sintomáticos, 13 pacientes (27%) presentaron complicaciones: tres casos de infección, cuatro casos de aflojamiento sintomático, dos neuroapraxias, una inestabilidad y tres casos de sobredimensionamiento con rigidez asociada. Nueve pacientes (18.75%) fueron reintervenidos. Discusión: Presentamos 27% de complicaciones globales, principalmente relacionadas con la sobredimensión y el aflojamiento protésico y 19% de reintervenciones. Estos resultados son similares a los descritos en estudios previos con variaciones en función del tiempo de seguimiento. Asimismo, se requieren nuevos estudios para evaluar los resultados a largo plazo y la posible progresión de los hallazgos radiográficos. Conclusión: En conjunto, estos datos ponen de manifiesto la necesidad de mejoría tanto de la técnica quirúrgica como del diseño de los implantes.

Abstract: Introduction: The objective of this study is to assess the type, frequency and severity of complications after the implantation of the modular monopolar radial head prosthesis. Material and methods: Forty-seven patients with 48 radial head prostheses implanted between 2009 and 2017 were reviewed retrospectively. Patients were evaluated clinical and radiographically for a mean follow-up of 43.55 months (range: 12-89). Results: The same type of prosthesis was implanted in every patient (Ascension Modular Radial Head). The average score in the Mayo Elbow Performance Score was 88.29 ± 9.9 points. During the follow-up, three patients (6.25%) suffered from continuous pain. Twelve cases (25.5%) showed radiological oversizing, though only five were symptomatic. Heterotopic ossification was detected in twenty-seven cases (57.4%). Eleven patients (23.4%) developed postoperative stiffness. Nineteen cases (40.42%) showed periprosthetic osteolysis, from which seven were symptomatic. Thirteen patients (27%) developed surgery-related complications: three cases of infection, four cases of symptomatic loosening, two neurapraxies, one instability and three cases of oversizing with associated stiffness. Nine patients (18.75%) required reintervention. Discussion: Our study obtains a 27% of overall complications, mostly related to oversizing and prosthetic loosening, and 19% of reinterventions. These results are similar to those presented in previous studies, with variations depending on the time of follow-up. Further research is also required to evaluate long-term results and the potential progression of the radiographic findings. Conclusion: Taken together, these data stress the need for improvement in both the surgical technique and the design of the implants.

Assuntos

RESUMO

Resumen: Introducción: La luxación congénita de cabeza radial es un padecimiento que se ha descrito en contados casos en la literatura internacional, siendo la luxación anterior y lateral las formas de presentación menos frecuentes con 15% de los casos cada una y la luxación posterior la más frecuente con 70% del total de los casos reportados. Sin embargo, esta patología es considerada la patología congénita más frecuente del codo en el niño. Se presenta el caso de un paciente con luxación congénita de codo variedad anterior y otro caso con luxación variedad lateral, ambos diagnosticados a temprana edad, en los que se decidió realizar un manejo conservador y un seguimiento anual. Asimismo, se hizo una revisión bibliográfica del tema. Discusión: La luxación congénita de codo tiene por lo general una evolución benigna, siendo indolora y poco limitante para el paciente, por lo que puede ser manejada de manera conservadora. El dolor y la limitación de movimientos son indicativos de un tratamiento quirúrgico; sin embargo, no son ampliamente aceptados debido a las complicaciones y resultados deficientes que presentan.

Abstract: Introduction: Congenital dislocation of the Radial head is a condition that has been described in a few cases in the international literature, the anterior and lateral dislocation were the less frequent forms of presentation with 15% of cases, each, and the posterior dislocation the most frequent with 70% of the total cases reported. However, this pathology is considered the most frequent congenital pathology of the elbow in children. The present study describes the case of a patient with congenital dislocation of elbow anterior variety and another case with dislocation lateral variety, both diagnosed at an early age, in which it has been decided for conservative management and an annual follow-up. A bibliographic review of the subject is also carried out. Discussion: The congenital elbow dislocation usually has a benign evolution, being painless and not very limiting for the patient, so it can be managed conservatively. Pain and limited movement are indicative of surgical treatment. There are multiple surgical treatments for this entity, however they are not widely accepted due to the complications and poor results presented by them.

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Resumen: La neuropatía por atrapamiento del nervio Interóseo Posterior, rama motora del nervio radial, puede ser causada por la compresión estructural, mecánica, o dinámica en lugares específicos que conducen a la lesión del nervio. La proximidad del nervio interóseo posterior a la cabeza del radio lo hace susceptible a lesiones por eventos traumáticos agudos o crónicos, como manifestación tardía secundaria a luxación de la cabeza del radio. Esta última es una entidad poco frecuente en el adulto y siempre plantea diversos diagnósticos diferenciales referidos a su origen y eventual asociación con Acondroplasia. La patología compresiva del nervio Interóseo Posterior puede generar dos síndromes diferentes: Síndrome del nervio interóseo posterior o Síndrome del túnel radial. En este artículo se describe el caso de un adulto con una neuropatía por atrapamiento del nervio Interóseo Posterior, con subluxación unilateral de cabeza del radio y antecedentes personales de Displasia Ósea. A través del análisis de los estudios de electrodiagnóstico e imagenología, se plantean los diagnósticos diferenciales, etiológicos y diagnóstico positivo de Síndrome del nervio interóseo posterior. Así como su posibilidad de tratamiento conservador y quirúrgico.

Abstract: Entrapment neuropathy of the posterior interosseous nerve, motor branch of the radial nerve can be caused by structural, mechanical, or dynamic compression in specific locations that lead to nerve injury. The proximity of the posterior interosseous nerve to the radial head makes it susceptible to injury from acute or chronic traumatic events, such as late manifestation secondary to dislocation of the radial head. The latter is a rare entity in adults and always raises several differential diagnoses related to their origin and possible association with Achondroplasia. The compressive pathology of the posterior interosseous nerve can generate two different syndromes: posterior interosseous nerve syndrome or radial tunnel syndrome. This article describes the case of an adult with a posterior interosseous nerve entrapment neuropathy with unilateral radial head dislocation and personal history of Bone Dysplasia. Through analysis of electrodiagnostic and imaging studies, differential diagnoses, etiological and positive diagnosis of posterior interosseous nerve syndrome arise. As well as the possibility of conservative and surgical treatment.

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ABSTRACT Fractures of the radial head and radial neck correspond to 1.7-5.4% of all fractures and approximately 30% may present associated injuries. In the literature, there are few reports of radial head fracture with posterior interosseous nerve injury. This study aimed to report a case of radial head fracture associated with posterior interosseous nerve injury. CASE REPORT: A male patient, aged 42 years, sought medical care after falling from a skateboard. The patient related pain and limitation of movement in the right elbow and difficulty to extend the fingers of the right hand. During physical examination, thumb and fingers extension deficit was observed. The wrist extension showed a slight radial deviation. After imaging, it became evident that the patient had a fracture of the radial head that was classified as grade III in the Mason classification. The patient underwent fracture fixation; at the first postoperative day, thumb and fingers extension was observed. Although rare, posterior interosseous nerve branch injury may be associated with radial head fractures. In the present case, the authors believe that neuropraxia occurred as a result of the fracture hematoma and edema.

RESUMO As fraturas da cabeça e do colo do rádio correspondem a 1,7% a 5,4% de todas as fraturas e 30% podem apresentar lesões associadas. Na literatura existem poucos casos descritos de fratura da cabeça do rádio com lesão do nervo interósseo posterior. O objetivo deste trabalho é relatar um caso de fratura da cabeça do rádio associada a lesão do nervo interósseo posterior (NIP). RELATO DE CASO: Paciente masculino, 42 anos, procurou atendimento médico após queda de skate. Relatava dor e limitação de movimento do cotovelo direito, bem como dificuldade de estender os dedos da mão ipsilateral. Durante o exame físico, evidenciou-se déficit de extensão do polegar e dos dedos da mão. A extensão do punho apresentava um leve desvio radial. Após exames de imagem, ficou evidenciado que o paciente apresentava uma fratura da cabeça do rádio tipo grau III de Mason. O paciente foi submetido à fixação da fratura; no primeiro dia do pós-operatório notou-se o retorno da extensão do polegar e dos dedos da mão. Apesar de rara, a lesão do ramo interósseo posterior pode estar associada a fraturas da cabeça do rádio. No presente caso, acredita-se que a neuropraxia se deu em decorrência do hematoma e do edema fraturário.

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RESUMO

Las fracturas conminutas de la cabeza del radio son muy difíciles de reconstruir y a menudo conducen a la resección total. El resultado puede ser una inestabilidad longitudinal o lateral del antebrazo, con posible repercusión neurológica. Para prevenir estos problemas, la cirugía protésica es una alternativa terapéutica útil. Se presentan los resultados de 10 casos de fracturas complejas de cabeza del radio tratadas mediante la implantación de una prótesis de cabeza de radio de pricocarbono (Mopyc ®) con un seguimiento medio posoperatorio de 5,7 años. El balance articular medio fue de 124,3° para la flexión del codo; un déficit de extensión de 23,7°, una supinación de 74,7° y una pronación de 79,5°. La pérdida de fuerza de puño respecto a la extremidad contralateral fue del 46,09 por ciento. El Q-DASH medio posoperatorio fue 24,6, con dolor residual de 2,6 en la escala visual analógica. Se registraron dos casos con complicaciones. El nivel de satisfacción de los pacientes fue alto(AU)

Comminuted radial head fractures are difficult to reconstruct and often lead to total resection. They may result in longitudinal or lateral instability of the forearm and neurological damage. Prosthetic surgery is a useful therapeutic alternative in preventing these problems. We present the results of pyrolytic carbon prosthesis (Mopyc ®) for comminuted radial head fractures in 10 patients, with mean postoperative follow-up of 5.7 years. The mean range of motion was 124,3° for elbow flexion, with extension deficit of 23,7°, supination was 74,7°, and pronation 79.5°. Grip strength loss was 46.09 percent of the unaffected hand. The average postoperative Q-DASH was 24.6, with residual pain of 2.6 on the visual analogue scale. Two complications were recorded. The level of patient satisfaction was high(AU)

Les fractures comminutives de la tête radiale sont très difficiles à corriger, et elles résultent parfois en une résection totale. Le résultat peut être une instabilité longitudinale ou latérale de l'avant-bras, avec une possible atteinte neurologique. Afin de prévenir ces problèmes, la chirurgie prothétique pourrait être le traitement de choix. On présente ici les résultats de 10 cas de fractures complexes de la tête radiale traitées par implantation d'une prothèse en pyrocarbone (MoPyc®), et ayant des reculs postopératoires moyens de 5,7 ans. Le bilan articulaire moyen a été 124,3º de la flexion du coude, un déficit d'extension de 23,7º, une supination de 74,7º, et une pronation de 79,5º. La perte de force musculaire dans le poignet par rapport à l'extrémité controlatérale a été 46,09 pourcent. Le Q-DASH moyen postopératoire a été 24,6, et une douleur résiduelle de 2,6 dans l'échelle visuelle analogique. Deux cas ont eu des complications. Le niveau de satisfaction des patients a été haut(AU)

Assuntos

RESUMO

Fractures of the radial head and radial neck correspond to 1.7-5.4% of all fractures and approximately 30% may present associated injuries. In the literature, there are few reports of radial head fracture with posterior interosseous nerve injury. This study aimed to report a case of radial head fracture associated with posterior interosseous nerve injury. CASE REPORT: A male patient, aged 42 years, sought medical care after falling from a skateboard. The patient related pain and limitation of movement in the right elbow and difficulty to extend the fingers of the right hand. During physical examination, thumb and fingers extension deficit was observed. The wrist extension showed a slight radial deviation. After imaging, it became evident that the patient had a fracture of the radial head that was classified as grade III in the Mason classification. The patient underwent fracture fixation; at the first postoperative day, thumb and fingers extension was observed. Although rare, posterior interosseous nerve branch injury may be associated with radial head fractures. In the present case, the authors believe that neuropraxia occurred as a result of the fracture hematoma and edema.

As fraturas da cabeça e do colo do rádio correspondem a 1,7% a 5,4% de todas as fraturas e 30% podem apresentar lesões associadas. Na literatura existem poucos casos descritos de fratura da cabeça do rádio com lesão do nervo interósseo posterior. O objetivo deste trabalho é relatar um caso de fratura da cabeça do rádio associada a lesão do nervo interósseo posterior (NIP). RELATO DE CASO: Paciente masculino, 42 anos, procurou atendimento médico após queda de skate. Relatava dor e limitação de movimento do cotovelo direito, bem como dificuldade de estender os dedos da mão ipsilateral. Durante o exame físico, evidenciou-se déficit de extensão do polegar e dos dedos da mão. A extensão do punho apresentava um leve desvio radial. Após exames de imagem, ficou evidenciado que o paciente apresentava uma fratura da cabeça do rádio tipo grau III de Mason. O paciente foi submetido à fixação da fratura; no primeiro dia do pós-operatório notou-se o retorno da extensão do polegar e dos dedos da mão. Apesar de rara, a lesão do ramo interósseo posterior pode estar associada a fraturas da cabeça do rádio. No presente caso, acredita-se que a neuropraxia se deu em decorrência do hematoma e do edema fraturário.

RESUMO

Introducción: La cabeza radial es un estabilizador primario e importante del codo mayormente para la estabilidad en valgo, desplazamiento postero-lateral, axial del radio y carga en varo. Las fracturas de cabeza radial representan de 1.7 al 5% de todas las fracturas en adultos, de 17 al 19% en los traumas de codo y 33% de todas las fracturas del codo, siendo ésta la más común a este nivel. Para una fractura de cabeza radial que no se puede reconstruir, las opciones de tratamiento son excisión de la cabeza radial o hemiartroplastía. Objetivo: Evaluar la funcionalidad de los pacientes con hemiartroplastía de cúpula radial por fracturas tipo III y IV según Mason-Johnston, por medio de las escalas de Índice de Mayo de desempeño del codo (Mayo Elbow Performance Índex (IMDC)) y Quick-Dash (QD). Material y métodos: Se realizó un estudio, observacional, transversal y ambiespectivo, en el Servicio de Miembro Torácico del Hospital de Traumatología y Ortopedia "Lomas Verdes", en un período de un año, se incluyeron pacientes de 18 a 60 años de edad, con diagnóstico de fractura de cúpula radial tipo III y IV según Mason-Johnston manejados con hemiartroplastía de cúpula radial. Resultados: Fueron incluidos siete pacientes, de los cuales 3 fueron del sexo femenino (42.9%) y 4 fueron del sexo masculino (57.1%). De la clasificación de funcionalidad IMDC se obtuvieron los siguientes resultados. Excelente, 6 pacientes (85.7%); Bueno, 1 paciente (14.3%). La escala de funcionalidad y sintomatología de QD se obtuvieron seis pacientes con puntuación de 0 a 5 y un paciente con puntuación de más de 10. Conclusiones: El tratamiento quirúrgico consistente en hemiartroplastía de cúpula radial por fracturas tipo III y IV según Mason-Johnston es un buen tratamiento quirúrgico a corto plazo, debido a que nos ofrece una funcionalidad de excelente a buena, estabilidad en valgo y varo del codo, así como sintomatología mínima del codo.

Introduction: The radial head is a primary and important stabilizer of the elbow, mainly for valgus stability, posterolateral and axial displacement of the radius and varus loading. Radial head fractures account for 1.7-5% of all fractures in adults, 17-19% of elbow trauma, and 33% of all elbow fractures. The latter is the most common one at this level. The alternatives for a radial head fracture that cannot be reconstructed include excision of the radial head or hemiarthroplasty. Objective: To assess the function of patients who underwent radial head hemiarthroplasty for Mason-Johnston types III and IV fractures, using the Mayo Elbow Performance Index (MEPI) and Quick-Dash (QD). Material and methods: A one-year long observational, cross-sectional and ambispective study was conducted at the Thoracic Limb Service, "Lomas Verdes" Orthopedics and Traumatology Hospital. The patients included were ages 18 to 60 years, had a diagnosis of Mason-Johnston types III and IV radial head fractures and were treated with radial head hemiarthroplasty. Results: A total of seven patients were included, 3 females (42.9%) and 4 males (57.1%). The results of elbow function according to the MEPI were as follows: Excellent, 6 patients (85.7%); Good, one patient (14.3%). The results of the QD functionality and symptoms scale were: 6 patients had a score of 0-5, and one patient more than 10. Conclusions: Surgical treatment consisting of radial head hemiarthroplasty for Mason-Johnston types III and IV fractures yields good short-term results, because it provides excellent to good function, valgus and varus elbow stability, and minimum elbow symptoms.

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A rapid prototyping model of Mason II fracture was used to investigate baseline recommendations for surgical intervention founded on kinematic forearm rotational blockage. Exact replicas of the radial heads in nine cadaveric specimens were produced and specimens were tested in a physiologic elbow simulator. After testing supination/pronation, the rotations were repeated with native replicas and with replicas modeling 3 mm depressed Mason II fractures with and without a gap of 1 mm between the body and fragment. The fragments were located circumferentially around the radial head at 10, 2 and 6 o'clock positions. There was no statistical difference between the range of motion of the native case and the native replica without fracture. After inclusion of the fracture, seven of the nine specimens showed rotational blockages. A two-way ANOVA found no statistical difference due to type of Mason II fracture (p > 0.87) or fracture location (p > 0.27). A χ-square analysis showed that presence of a kinematic deficit with a fractured radial head was significant (p < 0.03). The results support continued surgical intervention for a 3 mm depressed fracture and also establish the use of the rapid prototype as a model for kinematic investigation of fractures in a cadaveric model when ligamentous attachments are preserved.

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