TREATMENT OF PEDIATRIC FEMUR FRACTURES WITH FLEXIBLE STAINLESS STEEL INTRAMEDULLARY NAIL.

OBJECTIVES: To identify the characteristics of patients and femur fractures treated with a stainless steel intramedullary nail (ESIN) in children under 15 years of age. Know the results of using the ESIN of related steel in the service. METHODS: Retrospective study with review of hospital records and organization of data in spreadsheets. RESULT: 24 cases were identified, 17 male cases and 7 female cases. A minimum age of 4 years and a maximum of 11 years were observed (average of 7 years). The 3 most common trauma mechanisms were being run over (n:8, 33%) and falling from a height (n:8, 3%). The most common location of the fractures was in the mid-diaphyseal region (n: 20, 88%), only one case presented a bilateral femur fracture. The most common associated trauma was traumatic brain injury. The observation period observed several months between 2 and 5. With regard to complications, 3 cases were observed (12.5%) being bursitis, vicious construction and loss of reduction. CONCLUSION: Steel HIF shows similar good results. As the study includes the retrospective profile, the absence of a group and the small sample size. Level of Evidence IV, Case series.

OBJETIVOS: Identificar as características dos pacientes e das fraturas de fêmur tratadas com haste intramedular flexível (HIF) de aço inoxidável em menores de 15 anos. A partir disso, conhecer os resultados relacionados ao uso da HIF de aço inoxidável no serviço. Métodos: Estudo retrospectivo, com revisão de prontuários hospitalares e organização dos dados em planilhas. RESULTADO: Identificados 24 casos, sendo 17 do gênero masculino e sete do gênero feminino. Foram observadas idade mínima de 4 anos e máxima de 11 anos (média de 7 anos). Os mecanismos de trauma mais comuns foram atropelamento (n: 8, 33%) e queda de altura (n: 8, 33%). A localização mais comum das fraturas foi na região médio diafisária (n: 20, 88%), apenas um caso apresentou fratura de fêmur bilateral. O trauma associado mais comum foi traumatismo crânio-encefálico. O período de consolidação observado variou entre 2 e 5 meses. No que se refere a complicações, foram observados três casos (12,5%), sendo estes: bursite, consolidação viciosa e perda de redução. Conclusão: A HIF de aço apresenta bons resultados, semelhantes aos das hastes de titânio. As limitações do estudo incluem o perfil retrospectivo, a ausência de grupo controle e o número pequeno da amostra. Nível de evidência IV, Série de casos.

Design and simulation of scaffolds with lattice microstructures for bioprinting bone tissue.

BACKGROUND: Tissue engineering seeks to improve, maintain, or replace the biological functions of damaged organs or tissues with biological substitutes such as the development of scaffolds. In the case of bone tissue, they must have excellent mechanical properties like native bone. OBJECTIVE: In this work, three geometric models were designed for scaffolds with different structure lattices and porosity that could be biomechanically suitable and support cell growth for trabecular bone replacement applications in tissue engineering and regenerative medicine to the proximal femur area. METHODS: Geometries were designed using computer-aided design (CAD) software and evaluated using finite element analysis in compression tests. Three loads were considered according to the daily activity: 1177 N for slow walking, 2060 N for fast walking, and 245.25 N for a person in a bipedal position. All these loads for an adult weight of 75 kg. For each of them, three biomaterials were assigned: two polymers (poly-glycolic acid (PGA) and poly-lactic acid (PLA)) and one mineral (hydroxyapatite (HA)). 54 tests were performed: 27 for each of the tests. RESULTS: The results showed Young's modulus (E) between 1 and 4 GPa. CONCLUSION: If the resultant E is in the range of 0.1 to 5 GPa, the biomaterial is considered an appropriate alternative for the trabecular bone which is the main component of the proximal bone. However, for the models applied in this study, the best option is the poly-lactic acid which will allow absorbing the acting loads.

Age Prediction Using Pixel Value Sum from Radiographic Proximal Femur in a Thai Population / Predicción de la Edad Utilizando la Suma de Valores de Pixeles del Fémur Proximal Radiográfico en una Población Tailandesa

SUMMARY: The present study aimed to investigate the utility of the proximal femur in the forensic age estimation by assessing changes in bone densities through radiographs. Using Otsu's threshold, bone density was quantified by counting all white pixel values within selected regions of interest, which include femoral head (FH), femoral neck (FN), Ward's triangle (WT), and greater trochanter (GT) from 354 left femora of Northern Thai descent. The pixel width of medullary cavity (MC) was also estimated. Furthermore, the study evaluated the performance of linear regression (LR) models for age estimation from radiographic images of proximal femora. Negative correlations were observed between FH, FN, WT, and GT pixel intensity with the age-at-death of the samples, with females exhibiting stronger correlations than males. Moreover, a positive correlation was found between age and MC width in female samples, while male MC widths did not show any relationship with increasing age. The results showed a slight difference between the LR model applied to both sexes, which integrated all variables, and the alternative configuration that only utilized relevant attributes. Both models exhibited similar performance, with a narrow range of root mean square error (RMSE) values, ranging from 12.67 to 12.71 years, and a correlation coefficient range of 0.51 to 0.52. For females, the LR model with FN and WT as selected attributes (RMSE = 11.85 years, correlation coefficient = 0.65) performed decently, while for males, the LR model with all variables showed RMSE of 12.52 years and correlation coefficient of 0.46. This study showcased the potential application of pixel intensity in predicting age.

El presente estudio tuvo como objetivo investigar la utilidad del fémur proximal en la estimación forense de la edad mediante la evaluación de cambios en las densidades óseas a través de radiografías. Utilizando el umbral de Otsu, la densidad ósea se cuantificó contando todos los valores de pixeles blancos dentro de regiones de interés seleccionadas, que incluyen la cabeza femoral (CF), el cuello femoral (CF), el triángulo de Ward (WT) y el trocánter mayor (TM) de 354 fémures izquierdos de ascendencia del norte de Tailandia. También se estimó el ancho de pixeles de la cavidad medular (CM). Además, el estudio evaluó el rendimiento de modelos de regresión lineal (RL) para la estimación de la edad a partir de imágenes radiográficas de fémur proximal. Se observaron correlaciones negativas entre la intensidad de los pixeles CF, CF, WT y TM con la edad de muerte, y las mujeres exhibieron correlaciones más fuertes que los hombres. Además, se encontró una correlación positiva entre la edad y el ancho del CM en muestras de mujeres, mientras que el ancho del CM del hombre no mostró ninguna relación con el aumento de la edad. Los resultados mostraron una ligera diferencia entre el modelo RL aplicado a ambos sexos, que integraba todas las variables, y la configuración alternativa que sólo utilizaba atributos relevantes. Ambos modelos mostraron un rendimiento similar, con un rango estrecho de valores del error cuadrático medio (RMSE), que oscilaba entre 12,67 y 12,71 años, y un rango de coeficiente de correlación de 0,51 a 0,52. Para las mujeres, el modelo RL con CF y WT como atributos seleccionados (RMSE = 11,85 años, coeficiente de correlación = 0,65) tuvo un desempeño satisfactorio, mientras que para los hombres, el modelo RL con todas las variables mostró un RMSE de 12,52 años y un coeficiente de correlación de 0,46. Este estudio mostró la posible aplicación de la intensidad de los pixeles en la predicción de la edad.

Functional Evaluation of Endoscopic Treatment of Ischiofemoral Impingement: Case Reports.

Ischiofemoral impingement (IFI), although infrequent, should be thought of as one of the causes of deep gluteal pain syndrome. Difficulty in establishing a diagnosis and inaccurate clinical examination can be associated with the small number of case reports in the literature. The initial IFI treatment uses conservative measures, and surgical treatment is infrequent. The following is a case report of four adult patients, all female, diagnosed with IFI, with unsuccessful conservative treatments, in whom endoscopic resection of the smaller trochanter was performed with good results.

Distal femur fractures in elderly treated with internal fixation or distal femoral replacement - retrospective cohort study on 75 patients assessing functional outcomes, reoperations, and mortality.

PURPOSE: This cohort study aimed to describe the functional outcomes, complications, and mortality of patients over 65 with acute distal femur fractures treated with open reduction and internal fixation (ORIF) or distal femoral replacement (DFR). METHODS: We retrospectively analyzed all patients older than 65, operated consecutively for a distal femur fracture treated with ORIF or DFR. We included 75 patients (9 33A, 5 33B, and 61 33C AO/OTA fractures), 55 treated with ORIF, and 20 with DFR. We used Parker's mobility index (PMI) to assess functional outcomes at 1, 3, and 12 months and study closure. We analyzed complications, reoperations, and mortality at 30 days, one year, and at the end of the study. RESULTS: The PMI was significantly higher in the DFR group at months 1 (p = 0.023) and 3 (p = 0.032). We found no significant differences between cohorts at one year and the end of follow-up. Postoperative complications were significantly more frequent in the ORIF group (38.10% vs. 10%, p = 0.022). Reoperations were similar in both cohorts (p = 0.98). Mortality at one month was 4% and 20% at one year, and at the end of follow-up, there were no significant differences between groups. CONCLUSION: The outcomes of this study suggest that DFR offers a faster functional recovery with lower complication rates than those treated with ORIF. Additionally, both options have similar reoperation and mortality rates. Appropriately designed studies are needed to define the best treatment strategy for this type of patient.

A Novel Method of Treatment of Small Osteolabral Avulsions Associated with Posterior Fracture dislocation of the Hip / Um novo método de tratamento de pequenas avulsões osteolabrais associadas a fratura-luxação posterior do quadril

Abstract Small osteolabral avulsions of the hip can be easily missed, and postreduction stress testing and computed tomography (CT) scans of the hip should be performed to look for these injuries. The usual modality of treatment of these unstable osteolabral avulsions is suture anchors, Herbert screws or spring plates. But when the bony avulsion is small, the use of these implants becomes a tedious job. We present a novel technique to fix small osteochondral avulsion fractures not amenable to fixation using screws or spring plates. We performed a retrospective analysis of 57 cases of patients who underwent open reduction and internal fixation for posterior fracture dislocation of the acetabulum, and we identified 6 cases of small posterior labral osteochondral fragments leading to instability. These injuries were fixed using a novel method. The mean Harris Hip Score at the final follow-up was of 92.5. Fixation of osteochondral avulsions associated with posterior hip fracture dislocation can be a difficult task if the bony fragment is small. Our technique is a simple, cost-effective and reliable way of fixing such avulsions with satisfactory outcomes.

Resumo Pequenas avulsões osteolabrais do quadril podem passar despercebidas, e testes de estresse pós-redução e tomografia computadorizada do quadril devem ser realizados para sua detecção. O tratamento dessas avulsões osteolabrais instáveis geralmente é feito com âncoras de sutura, parafusos de Herbert ou placas-molas. Em avulsões ósseas pequenas, porém, o uso desses implantes é um trabalho tedioso. Apresentamos uma nova técnica de fixação de pequenas fraturas com avulsões osteocondrais não passíveis de fixação com parafusos ou placas-molas. Realizamos uma análise retrospectiva de 57 casos de pacientes submetidos à redução aberta e fixação interna de fratura-luxação posterior do acetábulo, e identificamos 6 casos em que um pequeno fragmento osteocondral labral posterior causava instabilidade. Essas lesões foram corrigidas com um novo método. A pontuação média no Harris Hip Score no último acompanhamento foi de 92,5. A fixação de avulsões osteocondrais associadas a fratura-luxação posterior do quadril pode ser difícil se o fragmento ósseo for pequeno. Nossa técnica é uma maneira simples, econômica e confiável de corrigir tais avulsões com resultados satisfatórios.

Geriatric proximal femur fracture updates.

Proximal femur fractures in the aging population present a variety of challenges. Physiologically, patients incurring this fracture are typically frail, with significant medical comorbidities, yet require early surgical treatment to restore mobility to prevent deterioration. Socioeconomically, the occurrence of a fragility fracture may be the beginning of the loss of independence, and the burdens of rehabilitation and support are borne by the individual patient and health care systems.

Femoral neck osteosynthesis using interfragmentary compression or position screw in synthetic bones. What are the mechanical differences?

PURPOSE: We aim to compare interfragmentary compression with the position osteosynthesis in the fixation of different femoral neck fractures (FN) in synthetic bones subjected to vertical load. METHODS: Forty-two synthetic femurs were subjected to neck fractures and separated into 3 groups according to the Pauwels classification: Pauwels I had 6 units (PI); Pauwels II, 24 units, with and without comminution (PII); and Pauwels III, 12 units, with and without comminution (PIII). After, they were fixed with 2 different ways: three 7, 0 mm cannulated lag screws (CSs) versus three 6, 5 mm solid fully threaded screws (SSs). Screws positioning was oriented by the Pauwels classification: inverted triangle or crossed screws. All specimens were submitted to vertical loading until failure. RESULTS: The average force was 79.4 ± 22.6 Kgf. The greatest one was recorded in model 1 (135.6 Kgf), and the lowest in model 41 (39.6 Kgf). CSs and SSs had similar resistance until failure (p = 0.2). PI showed heightened resistance and PIII showed a worse response (p < 0,01). CSs had better performance in PIII (p = 0.048). Comminution and screws orientation caused no difference on peak force (p = 0.918 and p = 0.340, respectively). CONCLUSIONS: In synthetic bones, the resistance of a femoral neck fracture osteosynthesis using a 7, 0 mm cannulated lag screw or 6, 5 mm solid fully threaded screw are similar. There was no loss of efficiency with comminution in the femoral neck. Osteosynthesis resistance decreased with the verticalization of the fracture line and, in the more vertical ones, interfragmentary compression with CSs was more resistant than positional osteosynthesis with SSs.

[National competitive bidding analysis of osteosynthesis materials in pediatric patients with femur fractures]. / Análisis de licitación pública nacional de materiales de osteosíntesis en los pacientes pediátricos con fracturas de fémur.

INTRODUCTION: health promotion policy requires the identification of barriers to the adoption of public policies. Paraguay's national healthcare system is inequitable, expensive, and inefficient. The Ministry of Public Health and Social Welfare (MSPyBS) is the entity responsible for covering the needs of a significant portion of the population. In January 2022, the MSPyBS financed the purchase of titanium elastic nails through a National Public Tender for Osteosynthesis Materials (LPN 02/22) to provide them for free in the pediatric service. Using research as a tool, we seek to analyze the impact of the implementation of LPN 02/22 at the Trauma Hospital, believing that this action would help streamline administrative and bureaucratic processes, making them more efficient with the assistance of the hospital's human resources. MATERIAL AND METHODS: a retrospective, analytical, and comparative study conducted at a high-complexity trauma center in Asunción, Paraguay. Patients aged 4 to 14 years with an indication for stabilization with elastic nails were included. Demographic data, the mechanism of injury, time elapsed from hospital arrival to surgical treatment, length of hospital stay, and the average hospital cost were analyzed based on the daily expense of pediatric patient hospitalization. RESULTS: 52 patients, divided into 25 cases in 2021 before implementation and 27 cases after implementation. The time elapsed from hospital arrival to definitive treatment was six days in the pre-implementation period, with an average stay from admission to discharge of 7.4 days. After implementation, the time from hospital arrival to definitive treatment was 4.3 days, and the average discharge time for the Post group was six days. The potential savings per patient amount to 332 dollars, offset by the institution's implant supply cost of 197 dollars, resulting in an approximate savings of 135 dollars per patient for the ministry. CONCLUSIONS: we view the implementation of free titanium elastic nails for pediatric femur fracture patients positively. We encourage the institution to continue with similar policies and strive to achieve even greater benefits for users.

INTRODUCCIÓN: la política de promoción de la salud requiere la identificación de los obstáculos para la adopción de políticas públicas. El sistema nacional de salud de Paraguay es inequitativo, caro e ineficiente. El Ministerio de Salud Pública y Bienestar Social (MSPyBS) es el ente que cubre las necesidades de gran parte de la población. El MSPyBS en Enero del 2022 financió, mediante la Licitación Pública Nacional de Materiales de Osteosíntesis (LPN 02/22), la compra de clavos elásticos de titanio para disponer de su uso gratuito en el Servicio de Pediatría; usando a la investigación como herramienta, buscamos analizar el impacto de la implementación de la LPN 02/22 en el Hospital de Trauma, creyendo que esta acción ayudaría a dinamizar los procesos administrativos y burocráticos, haciéndolos más eficientes con la ayuda de los recursos humanos del hospital. MATERIAL Y MÉTODOS: estudio retrospectivo, analítico y comparativo, realizado en un centro de trauma de alta complejidad de Asunción, Paraguay. Fueron incluidos los pacientes con edad comprendidas entre cuatro y 14 años, con indicación de estabilización con clavos elásticos. Se analizaron los datos demográficos, el mecanismo de trauma, el tiempo transcurrido desde la llegada al hospital hasta el tratamiento quirúrgico, así como el tiempo de estadía hospitalaria. Se evaluó el costo hospitalario promedio, basados en el gasto diario de la internación de un paciente pediátrico. RESULTADOS: cincuenta y dos pacientes, separados en 25 casos en el 2021 previo a la implementación y 27 casos posterior a la implementación. El tiempo transcurrido desde la llegada al hospital hasta el tratamiento definitivo fue de seis días para la etapa previa a la implementación; el promedio desde el ingreso hasta el alta fue de 7.4 días. Desde la implementación se tuvo un transcurso de 4.3 días desde la llegada al hospital hasta el tratamiento definitivo. El egreso del grupo Post tuvo un promedio de seis días. El ahorro probable en relación con cada paciente es de 332 dólares; a esto debemos contrarrestar el monto que paga la institución para la provisión del implante (197 dólares), por lo que el ahorro del ministerio sería de aproximadamente 135 dólares por cada paciente. CONCLUSIONES: vemos como positiva la implementación de la gratuidad de los clavos elásticos de titanio en los pacientes en edad pediátrica con fractura de fémur. Alentamos a la institución a seguir con políticas similares y tratar de lograr mayores beneficios para los usuarios.

Relationship between Femur Mineral Content and Local Muscle Strength and Mass.

Among the stimuli able to prevent early decreases in bone mineralization, exercise has a noticeable role per se as the source of mechanical stimulus or through lean tissue enlargement by its increasing of tensional stimulus. However, prevention strategies, including exercise, generally do not establish the moment in life when attention should begin to be paid to bone integrity, according to age group- and sex-related differences. Thus, this study analyzed the relationship between variables from the diagnosis of total and regional body composition, muscle strength, and bone mineral content (BMC) of femurs in young adult males. Thirty-four young Caucasian men (24.9 ± 8.6 years) had their body composition and bone density assessed by dual X-ray absorptiometry. The subjects performed a one-repetition maximum test (1-RM) in a bench press, front pulley, seated-row, push press, arm curl, triceps pulley, leg flexion, leg extension, and 45° leg press for the assessment of muscle strength in upper and lower limbs in single- and multi-joint exercises. Lean tissue mass in the trunk and upper and lower limbs were related to femoral BMC (Pearson coefficient ranging from 0.55 to 0.72, p < 0.01), and 1-RM values for different exercises involving both upper and lower limbs also correlated with femoral BMC (Pearson coefficients ranging from 0.34 to 0.46, p < 0.05). Taken together, these correlations suggest that muscle mass and strength are positively linked with the magnitude of femoral mass in men, even in early adulthood. Hence, the importance of an enhanced muscle mass and strength to the health of femoral bones in young adults was highlighted.

The Effects of Acute Binge Alcohol Consumption on the Trabecular Morphometry and Tensile Strength of Adolescent Sprague Dawley Rat Femora

SUMMARY: Excessive alcohol consumption adversely affects bone metabolism, thus resulting in reduced bone length, density, and strength. Moreover, these deficits in bone density and strength are likely to increase the risk of fragility fractures and the early onset of osteoporosis. While excessive alcohol consumption is an established risk factor for osteoporotic fractures, there remains a dearth of information in literature about bone effects of binge alcohol consumption in adolescents. Therefore, our study aimed to examine the effects of acute binge alcohol consumption on the adolescent bone micro-architecture and tensile strength. Twelve male Sprague Dawley rats aged 7 weeks were randomly placed in 2 groups: alcohol (n =6), receiving alcohol (3g/kg) and pair-fed control (n = 6), receiving an isocaloric equivalent of maltose dextrin via oral gavage for 3 days in one week (on alternative days). The femora were dissected and scanned using a Micro-Focus X-ray Computed Tomography (3D-µCT). Following reconstruction, trabecular morphometry was assessed in both the proximal and distal epiphysis, using a Volume Graphics Studio® software. A three-point bending test was employed to examine the effect of alcohol on the tensile strength of the bone. Results showed trabeculae parameters to be affected in the distal epiphysis of the femur, while in the proximal epiphysis it remained unaffected. Tensile strength parameters were also not affected by the consumption of alcohol. These findings may suggest that acute binge alcohol consumption has detrimental effects on the bone micro-architecture specific to the distal epiphysis.

El consumo excesivo de alcohol afecta negativamente al metabolismo óseo, lo que resulta en una reducción de la longitud, densidad y resistencia de los huesos. Además, es probable que estos déficits en la densidad y la fuerza ósea aumenten el riesgo de fracturas por fragilidad y la aparición temprana de osteoporosis. Si bien el consumo excesivo de alcohol es un factor de riesgo establecido para las fracturas osteoporóticas, existe escasa información en la literatura sobre los efectos óseos del consumo excesivo de alcohol en adolescentes. Por lo tanto, nuestro estudio tuvo como objetivo examinar los efectos del consumo excesivo de alcohol en la microarquitectura ósea y la resistencia a la tracción e n ratas adolescentes. Doce ratas macho Sprague Dawley de 7 semanas de edad se colocaron aleatoriamente en 2 grupos: alcohol (n = 6), que recibieron alcohol (3 g/kg) y control (n = 6), que recibieron un equivalente isocalórico de maltosa dextrina mediante sonda oral, durante 3 días en una semana (en días alternos). Los fémures se diseccionaron y escanearon mediante una tomografía computarizada de rayos X con microenfoque (3D-mCT). Después de la reconstrucción, se evaluó la morfometría trabecular tanto en la epífisis proximal como en la distal, utilizando un software Volume Graphics Studio®. Se empleó una prueba de flexión de tres puntos para examinar el efecto del alcohol sobre la resistencia a la tracción del hueso. Los resultados mostraron que los parámetros de las trabéculas se vieron afectados en la epífisis distal del fémur, mientras que en la epífisis proximal no se observaron afectados. Los parámetros de resistencia a la tracción tampoco se vieron afectados por el consumo de alcohol. Estos hallazgos pueden sugerir que el consumo excesivo de alcohol tiene efectos perjudiciales sobre la microarquitectura ósea específica de la epífisis distal del hueso.

Fracturas de fémur distal en población geriátrica: Evaluación de estadía hospitalaria y morbimortalidad / Distal femoral fractures in the elderly: assessment of length of stay and morbimortality

INTRODUCCION Las fracturas de fémur distal (FFD) son un problema importante de salud pública. Con el envejecimiento de la población, se espera un incremento de esta lesión en los próximos años. Objetivo Describir las complicaciones y la mortalidad de las FFD en un grupo de pacientes geriátricos. MATERIALES Y METODOS Estudio descriptivo y retrospectivo de pacientes mayores de 60 años operados por FFD, todos tratados en un mismo centro, entre 2011 y 2015, con al menos 1 año de seguimiento. Se excluyeron pacientes con ficha incompleta. Se analizaron los datos demográficos y radiológicos, las complicaciones locales y sistémicas, la estadía hospitalaria y la mortalidad. RESULTADOS En total, 16 pacientes cumplieron con los criterios de selección; tenían una mediana de edad de 73 (rango: 61 a 93) años, y 14 (87,5%) eran mujeres. La clasificación de la Asociación para el Estudio de la Fijación Interna (Arbeitsgemeinschaft für Osteosynthesefragen, AO, en alemán) de las fracturas fue: A ­12 (75%); B ­ 2 (12,5%); y C ­ 2 (12,5%). No hubo casos de fractura expuesta. Un total de 9 (56,3%) pacientes fueron operados con placa condilar dinámica, 4 (25%), con placa bloqueada, y 3 (19%), con clavo retrógrado. La mediana de latencia quirúrgica fue de 10 (rango: 3 a 27) días, con una mediana de hospitalización de 14 (rango: 5 a 47) días. Complicaciones fueran presentadas por 6 (37,5%) pacientes: 2 (12,5%) casos de tromboembolismo pulmonar y 4 (25%) casos que requirieron reintervención (2 fallos de osteosíntesis, 1 artrofibrosis y 1 no unión aséptica). No hubo complicaciones infecciosas. La mortalidad a 12 meses fue de 0%. CONCLUSIONES Los pacientes con FFD en esta cohorte geriátrica presentaron una larga estadía hospitalaria, con una alta tasa de complicaciones, que incluye un 25% de reintervenciones. Pese a esto, la mortalidad a 12 meses fue de 0%

INTRODUCTION Distal femoral fractures (DFF) are a relevant problem for public health worldwide. As the population ages, an increase in the rate of these lesions is expected in the next few years. Objective To describe the complications and mortality from DFF in geriatric patients. MATERIALS AND METHODS A descriptive and retrospective study with patients aged 60 years or older who underwent surgery due to DFF. All subjects received treatment in the same trauma center from 2011 to 2015 and underwent a minimum follow-up of 1 year. Patients with incomplete medical records were excluded. We analyzed demographics, radiological findings, local and systemic complications, length of stay, and mortality rates. RESULTS In total, 16 patients met the inclusion criteria; their median age was of 72 (range: 61 to 93) years, and 14 subjects (87,5%) were female. The classification of the Association for the Study of Internal Fixation (Arbeitsgemeinschaft für Osteosynthesefragen, AO, in German) was as follows: A ­ 12 patients (75%); B ­ 2 patients (12.5%); and C ­ 2 patients (12.5%). There were no open fractures. The devices used in the operations included dynamic condylar screw (DCS) plates (9 subjects; 56%), distal femur locking compression plates (LCPs) (4 subjects; 25%), and retrograde distal femoral nails (DFNs) (3 subjects; 19%). The median time until surgery was of 10 (range: 3 to 27) days, with a median length of stay of 14 (range: 5 to 47) days. Complications were presented by 6 (37.5%) patients: 2 (12.5%) cases of pulmonary thromboembolism and 4 (25%) cases which required reintervention (2 due to hardware failure, 1 because of arthrofibrosis, and 1 due to aseptic nonunion); there were no cases of infection. The mortality rate at 12 months was of 0%. CONCLUSION The patients with DFF in this geriatric cohort presented a long length of stay, with a high rate of complications, including a rate of 25% of reintervention. Nevertheless, the 1-year mortality rate was of 0%

Comparison of Locked Plates and Blade Plates for Varus Osteotomy of the Proximal Femur by the Finite Element Method.

Objective: The present study compared the difference in load and pressure distribution behavior of the blade plate and locked plate for varus osteotomy of the proximal femur per the finite element method. Methods: Modeling was performed by scanning a medium-sized left femur with medial valgus deformity made of polyurethane. Results: The stiffness of the locked plate is higher compared with that of the blade plate. However, this difference was not significant. In addition, the locked plate has proximal locking screws to ensure that the bending moments on the screws are smaller during loading. Conclusion: In summary, both plates are well-established and effective. However, the study using the finite element method plays a fundamental role in understanding the load and pressure distribution of the implant. Moreover, it opens up new possibilities for further studies, including surgical proposals and customized implant materials.

The effects of the industrial transition on lower limb bone structure: A comparison of the inhabitants of Pecos Pueblo and present-day Indigenous peoples of New Mexico.

OBJECTIVES: Comparisons between Indigenous peoples over time and within a particular geographic region can shed light on the impact of environmental transitions on the skeleton, including relative bone strength, sexual dimorphism, and age-related changes. Here we compare long bone structural properties of the inhabitants of the late prehistoric-early historic Pecos Pueblo with those of present-day Indigenous individuals from New Mexico. MATERIALS AND METHODS: Femora and tibiae of 126 adults from Pecos Pueblo and 226 present-day adults were included in the study. Cross-sectional diaphyseal properties-areas and second moments of area-were obtained from past studies of the Pecos Pueblo skeletal sample, and from computed tomography scans of recently deceased individuals in the present-day sample. RESULTS: Femora and tibiae from Pecos individuals are stronger relative to body size than those of present-day Indigenous individuals. Present-day individuals are taller but not wider, and this body shape difference affects cross-sectional shape, more strongly proximally. The tibia shows anteroposterior strengthening among Pecos individuals, especially among males. Sexual dimorphism in midshaft bone shape is stronger within the Pecos Pueblo sample. With aging, Pecos individuals show more medullary expansion but also more subperiosteal expansion than present-day individuals, maintaining bone strength despite cortical thinning. DISCUSSION: Higher activity levels, carried out over rough terrain and throughout adult life, likely explain the relatively stronger lower limb bones of the Pecos individuals, as well as their greater subperiosteal expansion with aging. Greater sexual dimorphism in bone structure among Pecos individuals potentially reflects greater gender-based differences in behavioral patterns.

Radiographically guided femoral neck osteosynthesis with cannulated compressive titanium screw and anti-rotational component in a Brown Howler Monkey (Alouatta guariba clamitans).

A Brown Howler Monkey presented with a femoral neck fracture was successfully treated with a cannulated compressive screw and an anti-rotational component inserted with radiographically guided technique. Complete bone consolidation and functional recovery were observed 9 weeks after the surgery, and the monkey was released to his place of origin.

In vivo evaluation of a polyester and fiberglass composite intramedullary nail for femoral osteosynthesis in calves.

The objective of this study was to test a composite of polyester resin and fiberglass in the form of an intramedullary nail for osteosynthesis of femoral fractures in calves. The methodology was established based on a previous study that used a bovine femur finite element model to simulate fractures, which were then stabilized by the same nails as proposed in this study. General anesthesia was induced in six calves followed by fracture creation via an oblique incision in the middle third of the femoral diaphysis, and osteosynthesis was immediately performed by retrograde insertion of the composite nail. Locking was achieved by drilling the bone and nail without using a jig and introducing two stainless steel screws proximal and two distal to the fracture line. Five of the six calves achieved complete fracture healing after 60 days. No signs of incompatibility or toxicity of the composite were observed. However, limitations were observed during the surgery, such as difficulty in drilling the nail and trimming the remainder portion of the nail that extended beyond the length of the bone. Small fragments produced by these maneuvers were considered irritating to soft tissues during the postoperative period. It was also found that small cracks in the nail tended to propagate in the form of longitudinal fractures. In conclusion, an intramedullary nail made of polyester resin and fiberglass (a low-cost and easy-to-acquire material) was considered biocompatible and capable of allowing bone healing of femoral fractures in young cattle. However, the development of solutions for the reported limitations is crucial prior to recommending the proposed composite for clinical use.

Anatomical Diversity in Femur bones: Understanding the Morphological Variability for Surgical and Prosthetic Applications / Diversidad Anatómica en Huesos Fémur: Comprensión de la Variabilidad Morfológica para Aplicaciones Quirúrgicas y Protésicas

SUMMARY: The femur, the body's longest bone, plays a critical role in orthopaedics and radiology. Understanding its anatomy, particularly the neck-shaft angle (NSA), is vital for diagnosing bone issues and designing hip implants. While some Asian populations' femur measurements have been studied, there is a research gap concerning Sri Lankans. This study aimed to fill this gap by examining the proximal femur's anatomy in the Sri Lankan population. We analysed 45 adult human femurs (26 right, 19 left) of unknown sex, ethically sourced from the University of Sri Jayewardenepura. Femurs with fractures or pathologies were excluded. Precise measurements were recorded using digital vernier callipers, with millimetre accuracy. Parameters included mean femoral length, vertical and transverse femoral head diameters, neck axis and neck length. Each measurement was taken three times to minimize subjectivity. Right femurs had a mean length of 42.8 mm (SD±2.64), while left femurs measured 43.53 mm (SD±3.27). Mean NSA was 125.78º (SD±4.45) for left femurs and 127.59º (SD±2.06) for right. Mean femoral head diameters were 4.09mm (SD±0.30) (right) and 4.12mm (SD±0.31) (left). Mean anterior neck lengths of the right and left were 2.61 (SD±0.54) and 2.71(SD±0.50) respectively. Comparing our findings with other Asian populations highlighted significant variations in femur measurements. These discrepancies emphasize the need for population-specific data for orthopaedic interventions and raise questions about the suitability of imported prosthetics. Differences in femur length, neck length, and NSA between sides suggest potential challenges in using implants designed for one side on the other. This study underscores the necessity of population-specific data in orthopaedics, as femur measurements differ even among Asian populations. Further research and statistical analysis are essential for tailoring orthopaedic solutions to individual populations. The findings also suggest a potential need for locally manufactured prosthetics to better suit the Sri Lankan population.

El fémur, el hueso más largo del cuerpo, desempeña un papel fundamental en ortopedia y radiología. Comprender su anatomía, en particular el ángulo cuello-diáfisis (NSA), es vital para diagnosticar problemas óseos y diseñar implantes de cadera. Si bien se han estudiado las medidas del fémur de algunas poblaciones asiáticas, existe un vacío en la investigación sobre los habitantes de Sri Lanka. Este estudio tuvo como objetivo examinar la anatomía del fémur proximal en la población de Sri Lanka. Analizamos 45 fémures humanos adultos (26 derechos, 19 izquierdos) de sexo desconocido, obtenidos éticamente de la Universidad de Sri Jayewardenepura. Se excluyeron fémures con fracturas o patologías. Se registraron mediciones precisas utilizando calibradores vernier digitales, con precisión milimétrica. Los parámetros incluyeron la longitud femoral media, los diámetros vertical y transversal de la cabeza femoral, el eje del cuello y la longitud del cuello. Cada medición se tomó tres veces para minimizar la subjetividad. Los fémures derechos tuvieron una longitud media de 42,8 mm (DE ± 2,64), mientras que los fémures izquierdos midieron 43,53 mm (DE ± 3,27). La NSA media fue de 125,78º (DE±4,45) para el fémur izquierdo y de 127,59º (DE±2,06) para el derecho. Los diámetros medios de la cabeza femoral fueron 4,09 mm (DE ± 0,30) (derecha) y 4,12 mm (DE ± 0,31) (izquierda). Las longitudes medias del cuello anterior de la derecha y la izquierda fueron 2,61 (DE ± 0,54) y 2,71 (DE ± 0,50) respectivamente. La comparación de nuestros hallazgos con otras poblaciones asiáticas destacó variaciones significativas en las medidas del fémur. Estas discrepancias enfatizan la necesidad de datos específicos de la población para las intervenciones ortopédicas y plantean dudas sobre la idoneidad de las prótesis importadas. Las diferencias en la longitud del fémur, la longitud del cuello y la NSA entre lados sugieren posibles desafíos al utilizar implantes diseñados para un lado en el otro. Este estudio subraya la necesidad de datos específicos de la población en ortopedia, ya que las mediciones del fémur difieren incluso entre las poblaciones asiáticas. Es esencial realizar más investigaciones y análisis estadísticos para adaptar las soluciones ortopédicas a poblaciones individuales. Los hallazgos también sugieren una posible necesidad de prótesis fabricadas localmente para adaptarse mejor a la población de Sri Lanka.

Polydioxanone Enhances Bone Regeneration After Resection and Reconstruction of Rat Femur with rhBMP2.

The aim of this study was to assess the bone regeneration potential of a polydioxanone (PDO) scaffold together with recombinant human bone morphogenetic protein-2 (rhBMP-2) for the reconstruction of large bone defect. In total, 24 male rats (6 months old) were subjected to bilateral femoral stabilization using titanium plates to create a 2 mm gap, and reconstruction using rhBMP-2 (Infuse®; 3.25 µg). The bone defects were covered with PDO (PDO group), or with titanium mesh (Ti group). Animals were euthanized on days 14 and 60. Simultaneously, 16 rats received PDO and Ti in their dorsum for the purpose of biocompatibility analysis at 3, 5, 7, and 10 days postoperatively. X-ray densitometry showed a higher density in the PDO group on day 14. On day 60, coverage of the bone defect with PDO showed a larger quantity of newly formed bone than that found for the Ti group, a lower inflammatory infiltrate value, and a more significant number of blood vessels on day 14. By immunohistochemical assessment, runt-related transcription factor 2 (RUNX2) and osteocalcin (OCN) showed higher labeling on day 14 in the PDO group. On day 60, bone morphogenetic protein-2 (BMP-2) showed higher labeling in the PDO group, whereas Ti showed higher labeling for osteoprotegerin, nuclear factor kappa B ligand-activating receptor, RUNX2, and OCN. Furthermore, biocompatibility analysis showed a higher inflammatory response in the Ti group. The PDO scaffold enhanced bone regeneration when associated with rhBMP-2 in rat femur reconstruction. Impact statement Regeneration of segmental bone defects is a difficult task, and several techniques and materials have been used. Recent advances in the production of synthetic polymers, such as polydioxanone (PDO), produced by three-dimensional printing, have shown distinct characteristics that could improve tissue regeneration even in an important bone defect. The present preclinical study showed that PDO membranes used as scaffolds to carry recombinant human bone morphogenetic protein-2 (rhBMP-2) improved bone tissue regeneration by more than 8-fold when compared with titanium mesh, suggesting that PDO membranes could be a feasible and useful material for use in guided bone regeneration. (In English, viable is only used for living creatures capable of sustaining life.

Geriatric distal femoral fractures: post-operative complications and nine-year mortality-a retrospective analysis of two tertiary trauma centres.

PURPOSE: This study aimed to estimate the mortality at various post-operative intervals and explore influential variables for these outcomes in elderly patients with distal femur fractures (DFF). METHODS: A retrospective observational study was conducted across two tertiary care institutions, between 2014 and 2020. The primary outcomes were mortality rates at 30-day, six month, and one year post-surgery. Secondary outcomes included 1-year readmission and reintervention rates along with their correlated complications. RESULTS: A total of 37 DFF in 35 patients was analyzed; average age was 83.6 years (range, 65-98 years). The overall mortality rate at a maximum follow-up of 8.8 years was 74% (26/35 patients). The median survival time was 3.2 years and the survival probability at five years was 27% (95% confidence interval [CI], 13 to 43%). Mortality rates at 30 days, six months, and one year after surgery were 8.6% (3 patients), 23% (8 patients), and 34% (12 patients), respectively. Overall mortality rate was 64% (15/24 patients) for native distal femur fractures, and 92% (13/14 patients) for periprosthetic fractures (p = 0.109). Patients older than 85 years and male gender were identified as risk factors for mortality within the first year post-operatively. CONCLUSION: Elderly fractures have a high mortality at eight years of follow-up. Mortality at one year was much higher than in other studies of the same nature. We did not find statistically significant differences when comparing native bone fractures with periprosthetic fractures. Factors that impact mortality were being a man, advanced age, elevated index comorbidity, and dementia. There is no relationship between the time to be taken to the surgical procedure and mortality results.

SUPERhip Reconstruction Treatment in Patients with Congenital Femoral Deficiency of Paley's Classification Type 1b.

BACKGROUND: Congenital femoral deficiency (CFD) is a challenging and complex condition that causes limb lengthening. We focused on the clinical and radiographic results of SUPERhip procedures in patients with congenital femoral deficiency type 1b, according to Paley's classification, prior to femoral lengthening. METHODS: We reviewed all records and radiographs of patients who underwent this procedure between 2005 and 2020. We included 26 patients, with clinical and radiographic assessments performed during pre- and post-operative evaluations. RESULTS: There were twenty-six patients (15 right vs. 11 left), with a mean age of 7 years (1-18). Most of the patients were female (17 patients; 65.4%). Twenty (76.9%) patients were undergoing their first procedure and six (23.1%) had already undergone a previous surgery. There was a significant improvement in all radiographic parameters, with the mean preoperative and postoperative Neck-Shaft Angle (NSA) being 72.3 ± 7.1° vs. 133.1 ± 12.7°, the Center-Edge Angle (CEA) 16.8 ± 9.8° vs. 33.5 ± 14.1°, and the Acetabular Index (AI) 27.8 ± 6.9° vs. 16.4 ± 6.8°, respectively. The complication rate was 15.4%, predominantly affecting patients under 5 years old. CONCLUSIONS: The SUPERhip procedure is an effective and reproducible technique for clinical and radiographic correction to a significant degree in patients with Paley's type 1b CFD, in preparation for bone lengthening surgery.