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Rev. cuba. ortop. traumatol ; 35(1): e347, 2021. ilus
Article in Spanish | LILACS, CUMED | ID: biblio-1289553


Introducción: Las convulsiones pueden producir una tensión muscular significativa capaz de fracturar el hueso. Se halló que el aumento significativo en la incidencia de fracturas se encuentra dentro del grupo de edad entre 45 a 64 años, lo que demuestra que los epilépticos no solo son más vulnerables a las fracturas, sino que tienen un comienzo de fractura más precoz. Las medidas de prevención comprenden suplementos de calcio, vitamina D, densitometría ósea y tratamiento con bifosfonatos, que deben reforzarse en pacientes con epilepsia que tienen riesgo de osteoporosis. Objetivo: Presentar casos de fracturas extracapsular e intracapsular de la cadera por convulsiones epilépticas, atendidos en el hospital Víctor Lazarte Echegaray, Trujillo, Perú, en el periodo comprendido entre 2013 y 2019. Presentación de los casos: Se reporta dos casos de fractura de cadera por convulsiones epilépticas, uno con fractura del acetábulo e iliaco izquierdo y otro a nivel del cuello femoral y subtrocantérica. Conclusiones: Las personas con convulsiones epilépticas poseen un mayor peligro de fracturas, por consiguiente se recomienda a los médicos que maximicen su conciencia sobre las fracturas relacionadas a convulsiones, en especial a pacientes con dolor postictal, debido a que los síntomas pueden ser inespecíficos y una mala interpretación puede impedir la rehabilitación(AU)

Introduction: Seizures can produce significant muscle tension capable of fracturing the bone. The significant increase in the incidence of fractures was found to be within the age group between 45 and 64 years, which shows that epileptics are not only more vulnerable to fractures, but also have earlier fracture onset. Prevention measures include calcium supplements, vitamin D, bone densitometry, and bisphosphonate treatment that should be reinforced in patients with epilepsy who are at risk for osteoporosis. Objective: To present cases of hip fractures due to epileptic seizures, treated at Víctor Lazarte Echegaray Hospital, Trujillo, Peru, from 2013 to 2019. Case report: Cases of hip fracture due to epileptic seizures have been reported, one with fracture of the acetabulum and left iliac and another at the level of the femoral and subtrochanteric neck. Conclusions: Individuals with epileptic seizures have greater risk of fractures, it is recommended that physicians maximize their awareness of seizure-related fractures, especially in patients with postictal pain, since the symptoms can be nonspecific and misinterpretation can prevent rehabilitation(AU)

Humans , Adult , Middle Aged , Seizures/etiology , Hip Fractures/surgery , Hip Fractures/complications , Peru , Arthroplasty/methods , Acetabulum/surgery
Article in Chinese | WPRIM | ID: wpr-879418


OBJECTIVE@#To measure the maximum corridor parameters of the infra acetabular screw and evaluate the feasibility of screw insertion through digital analysis of the acetabular structure.@*METHODS@#The pelvic CT data of 100 patients who received plain pelvic CT scan from April 2013 to June 2015 were retrospectively analyzed. There were 50 males, aged 20 to 84 years, with an average age of (48.42±17.48) years, and 50 females, aged 18 to 87 years, with an average age of (55.02±19.54) years. Patients with acetabular fractures, hip dysplasia, and metal implants in the acetabulum were excluded. Import CT data into Mimics software in DICOM format to generate a three-dimensional model, and find the axialprojection of the infra-acetabular corridor in the middle of the pubis ramus in the inlet view. A virtual screw was placed in the infra-acetabular space and measure the parameters including the diameter and the length of the maximum corridor, the distance from the insertion point to the pubic symphysis, to the anterosuperior iliac spine and to the medial edge of the pelvis. Then import the pelvic model into 3- matic software, establish the pelvic model anterior pelvic plane and median sagittal plane, and measure the angle between the screw axis and the two planes. A minimum corridor diameter of at least 5 mm was defined as a cutoff for placing a 3.5 mm screw, and calculate the screw insertion rate.@*RESULTS@#In 100 cases, 49% of patients had a infra acetabular corridor with a diameter ≥5 mm, and the rate of screw placement in men was significantly higher than that in women. The average diameter of the maximum corridor of infra-acetabular screw was (4.86±1.72) mm, the average length was (94.04±8.29) mm, the average distance from the insertion point to the pubic symphysis was (60.92±4.84) mm, to the anterosuperior iliac spine was (85.15± 6.85) mm, and to the medial edge of the pelvis was (6.12±3.32) mm. The mean angle between the axis of the screw and the median sagittal plane was (-1.38±4.74)°, and the mean angle between the axis of the screw and the anterior pelvic plane was (56.77±7.93)°. There are significant differences between male and female measured parameters, except for the angle between the screw axis and the anterior pelvic plane. There was no statistically significant difference in the maximum corridor parameters of infra-acetabular screw on both sides of the pelvis.@*CONCLUSION@#This study shows that the insertion rate of infra-acetabular screws is low in local patients, and the feasibility of screw insertion should be fully evaluated before surgery.

Acetabulum/surgery , Adolescent , Adult , Aged , Aged, 80 and over , Bone Screws , Feasibility Studies , Female , Fracture Fixation, Internal , Humans , Male , Middle Aged , Retrospective Studies , Young Adult
Article in Chinese | WPRIM | ID: wpr-888322


OBJECTIVE@#To investigate the application value of liquid crystal digital display goniometer in total hip arthroplasty.@*METHODS@#From January 2018 to December 2019, 83 patients underwent primary total hip arthroplasty, including 28 males and 55 females, aged 42 to 81 (70.4±7.9) years. There were 63 cases of femoral neck fracture and 20 cases of avascular necrosis of femoral head. All patients used liquid crystal digital goniometer to control the anteversion of acetabular cup prosthesis during operation, and CT scanning was used to measure the anteversion of acetabular cup after operation. The two methods were compared to understand the accuracy of using liquid crystal digital goniometer.@*RESULTS@#Postoperative CT measurement showed that the acetabular anteversion of all patients was in the safe area advocated by Lewinnek. The anteversion angle of acetabular cup measured by liquid crystal digital goniometer was 14.20(12.80 to 15.40)°, and the anteversion angle of acetabular cup measured by postoperative CT scan was 14.20 (13.40 to 15.50)°. There was no significant difference between the two (@*CONCLUSION@#It is an accurate and reliable method to control the anteversion of acetabular cup with liquid crystal digital display angle instrument, which has a good auxiliary reference value.

Acetabulum/surgery , Arthroplasty, Replacement, Hip , Female , Hip Prosthesis , Humans , Liquid Crystals , Male , Retrospective Studies
Article in Chinese | WPRIM | ID: wpr-879468


Since the concept of "safe area" put forward by Lewinnek, it has been widely recognized. While in recent years, many scholars have found that even if the acetabular prosthesis was placed on the "safe area", there were still many unexplained dislocation after total hip arthroplasty. And scholars began to question whether the "safe area" is really suitable for all patients. Spinal degeneration, deformity, lumbar fusion, etc. will lead to spine sagittal imbalance and changes in pelvic activity, which could lead to changes in acetabular orientation, and ultimately lead to edge loading, wear, impact, and even dislocation after total hip replacement. From the perspective of wear, impact and dislocation, it is determined by the functional positioning of the acetabular cup, not the anatomical positioning. The anatomical positioning and functional positioning of the neutral pelvic acetabular cup in the standing position can be considered equivalent. For pelvic rotation more than 20°, functional placement needs to be considered. In recent years, as the understanding of the internal relationship between the spine-pelvis-hip joint has become more and more profound, some scholars further classify the hip-spine relationship according to whether the spine is stiff or deformed, and propose corresponding acetabulums according to different types of hip-spine relationships The function of placement, so as to achieve a stable artificial hip joint. Therefore, it is of great significance to fully assess whether the patient's sagittal plane is balanced before surgery to guide artificial hip replacement surgery.

Acetabulum/surgery , Arthroplasty, Replacement, Hip , Hip Joint , Hip Prosthesis , Humans , Spine
Medwave ; 20(11): e8082, dic. 2020.
Article in English | LILACS | ID: biblio-1146066


PURPOSE To describe patient-reported outcomes, radiological results, and revision to total hip replacement in patients with hip dysplasia that underwent periacetabular osteotomy as isolated treatment or concomitant with hip arthroscopy. METHODS Case series study. Between 2014 and 2017, patients were included if they complained of hip pain and had a lateral center-edge angle ≤ of 20°. Exclusion criteria included an in-maturate skeleton, age of 40 or older, previous hip surgery, concomitant connective tissue related disease, and Tönnis osteoarthritis grade ≥ 1. All patients were studied before surgery with an anteroposterior pelvis radiograph, false-profile radiograph, and magnetic resonance imaging. Magnetic resonance imaging was used to assess intraarticular lesions, and if a labral or chondral injury was found, concomitant hip arthroscopy was performed. The non-parametric median test for paired data was used to compare radiological measures (anterior and lateral center-edge angle, Tönnis angle, and extrusion index) after and before surgery. Survival analysis was performed using revision to total hip arthroplasty as a failure. Kaplan Meier curve was estimated. The data were processed using Stata. RESULTS A total of 15 consecutive patients were included; 14 (93%) were female patients. The median follow-up was 3.5 years (range, 2 to 8 years). The median age was 20 (range 13 to 32). Lateral center-edge angle, Tönnis angle, and extrusion index correction achieved statistical significance. Seven patients (47%) underwent concomitant hip arthroscopy; three of them (47%) were bilateral (10 hips). The labrum was repaired in six cases (60%). Three patients (15%) required revision with hip arthroplasty, and no hip arthroscopy-related complications are reported in this series. CONCLUSION To perform a hip arthroscopy concomitant with periacetabular osteotomy did not affect the acetabular correction. Nowadays, due to a lack of conclusive evidence, a case by case decision seems more appropriate to design a comprehensive treatment.

Humans , Male , Female , Adolescent , Adult , Young Adult , Osteotomy/methods , Arthroscopy/methods , Hip Dislocation, Congenital/surgery , Acetabulum/surgery , Osteotomy/adverse effects , Follow-Up Studies , Treatment Outcome , Hip Dislocation, Congenital/diagnostic imaging
Rev. chil. ortop. traumatol ; 61(2): 40-46, oct. 2020. ilus, tab
Article in Spanish | LILACS | ID: biblio-1342377


OBJETIVO: Evaluar los resultados radiológicos a corto y mediano plazo de pacientes operados de fractura de pared posterior de acetábulo, describir la morfología de la fractura, presencia de lesiones asociadas y la necesidad de artroplastia total de cadera (ATC) durante la evolución. MATERIAL Y MÉTODOS: Estudio retrospectivo-descriptivo de una serie consecutiva de 40 pacientes operados entre julio de 2012 y julio de 2017 por fractura de pared posterior de acetábulo. Treinta y siete hombres y tres mujeres con una edad promedio de 41 años fueron operados (mediana de seguimiento 17,7 meses). Se registró el mecanismo del accidente y presencia de lesiones asociadas. Se registraron el número de fragmentos que presentaba la fractura, presencia de impactación marginal, compromiso de la cabeza femoral, presencia de fragmentos intra-articulares y complicaciones postoperatorias. Para el análisis estadístico se utilizó el test de Wilcoxon. RESULTADOS: Todos los casos fueron secundarios a un accidente de alta energía. Un 70% de los pacientes presentó luxación posterior. La mayoría de los pacientes presentó una fractura entre 2 y 5 fragmentos (70%), 47,5% de los pacientes presentó impactación marginal, 37,5% compromiso de la cabeza femoral en zona de carga, 30% fragmentos intra-articulares. La complicación que más frecuente se observó fue la artrosis post-traumática la cual se presentó en un 22,5%. Cinco pacientes (12,5%) requirieron ATC. CONCLUSIÓN: Aunque se categorizan dentro de los patrones simples, las fracturas de pared posterior son lesiones complejas. La tomografía axial computada preoperatoria es esencial para determinar lesiones intra-articulares dada su alta frecuencia y también permite realizar un buen plan preoperatorio.

OBJECTIVE: Evaluate radiologic results in short and medium-term in surgically treated patients with acetabular posterior wall fracture. Describe fracture morphology, the presence of associated lesions and the necessity of total hip arthroplasty (THA) during the evolution. MATERIALS AND METHODS: A retrospective-descriptive study design of 40 patients treated during July 2012 and July 2017 for acetabular posterior wall fracture. 37 men and 3 women, 41 years old mean age. The mean follow-up was 17.7 months. Accident mechanism and presence of associated lesions were registered, as well as the number of fragments of the fracture, the presence of marginal impaction, femoral head compromise, intra-articular fragments and postoperatory complications. Wilcoxon test was used for the statistical analysis. RESULTS: Every case resulted due to a high energy accident. 70% of patients had posterior luxation of the hip. 70% of patients presented 2 to 5 fragments. 47.5% of patients presented marginal impaction, 37.5% compromised femoral head and 30% intra-articular fragments. The most frequent complication was post-traumatic arthrosis, which appeared in 22.5% of patients. Five patients required THA. CONCLUSION: Though it is categorized as simple fracture pattern, posterior wall fractures are complex. Preoperatory CT scan is essential to determine intra-articular lesions due to its high frequency and permits to plan an adequate intervention.

Humans , Male , Female , Adult , Fractures, Bone/surgery , Fracture Fixation/methods , Acetabulum/injuries , Postoperative Complications , Retrospective Studies , Follow-Up Studies , Treatment Outcome , Fractures, Bone/etiology , Fractures, Bone/diagnostic imaging , Fracture Fixation, Internal/methods , Acetabulum/surgery , Acetabulum/diagnostic imaging
Rev. bras. anestesiol ; 70(4): 443-447, July-Aug. 2020. graf
Article in English, Portuguese | LILACS | ID: biblio-1137201


Abstract Background: There are various approaches to perform an ultrasound guided Quadratus Lumborum Block (QLB). The lateral, posterior, anterior or trans muscular and subcostal paramedian are the various approaches described for performing a QLB. Each of these blocks are aimed to achieve a maximum spread with high volume and low concentration of local anesthetics. Case report: In this novel approach a curvilinear ultrasound probe was used with the patient lying in supine position. The probe was placed longitudinally in the mid axillary line to visualize Quadratus Lumborum Muscle (QLM) in the coronal plane. The needle was then introduced from cranial to caudal direction and catheters were inserted in the Anterior Thoracolumbar Fascia (ATLF) up to a distance of 4-5 cm in 24 patients for an anterior approach to acetabulum fractures. The needle tip and the Local Anesthetic (LA) spread was visible in all patients. All patients except 4 had excellent perioperative pain relief considering stable hemodynamics and VAS 2-3/10 for the first 48 hours. All patients received 1 g intravenous paracetamol each 8 hours. VAS in postoperative period was 2-3/10, in 20/24 patients. In the postoperative period, 4 patients complained of persistent pain, requiring intravenous fentanyl boluses and multimodal analgesia. Mean VAS score was 2.87 from 0-12 hours, 3.14 from 12-24 hours and 3.35 from 24-48 hours. There were no block-related complications in any patient. Conclusion: The supine midaxillary coronal approach to anterior QLB is an effective and feasible approach to QLB which can be performed in supine position.

Resumo Justificativa: Existem várias abordagens para a realização do Bloqueio do Quadrado Lombar (BQL) guiado por ultrassom. Diversas abordagens são descritas para a realização do BQL: paramediana lateral, posterior, anterior ou transmuscular e subcostal, todas com o objetivo de obter a máxima dispersão da solução injetada, usando-se alto volume e baixa concentração de anestésico local. Relato de caso: Nesta nova abordagem, a sonda de ultrassom curvilínea foi usada com o paciente em decúbito dorsal. A sonda foi posicionada longitudinalmente na linha axilar média para visualizar o Músculo Quadrado Lombar (MQL) no plano coronal. A agulha foi introduzida na direção cranial-caudal, e foram inseridos cateteres na Fáscia Toracolombar Anterior (FTLA) até uma distância de 4-5 cm, em 24 pacientes a serem submetidos à correção de fratura do acetábulo pela via anterior. O bisel da agulha e a dispersão do Anestésico Local (AL) eram visíveis em todos os pacientes. Os 24 pacientes, com exceção de quatro, apresentaram excelente analgesia perioperatória, baseando-se na estabilidade hemodinâmica e nos escores EVA de 2-3/10 nas primeiras 48 horas. Todos os pacientes receberam 1 g de paracetamol intravenoso a cada 8 horas. O escore EVA no período pós-operatório foi de 2-3/10, em 20 dos 24 pacientes. No período pós-operatório, quatro pacientes apresentaram queixa de dor persistente, necessitando de bolus de fentanil por via intravenosa e analgesia multimodal. O escore médio da EVA no pós-operatório foi 2,87 entre 0-12 horas; 3,14 entre 12-24 horas e 3,35 entre 24-48 horas pós-operatórias. Não houve complicações relacionadas ao bloqueio em nenhum paciente. Conclusão: A abordagem supina axilar média coronal para BQL anterior é eficaz e viável para BQL, e pode ser realizada com os pacientes em decúbito dorsal.

Humans , Male , Female , Pain, Postoperative/prevention & control , Anesthetics, Local/administration & dosage , Nerve Block/methods , Time Factors , Supine Position , Abdominal Muscles , Ultrasonography, Interventional , Acetabulum/surgery , Acetabulum/injuries , Acetaminophen/administration & dosage , Middle Aged , Nerve Block/adverse effects
Acta ortop. mex ; 34(2): 123-128, mar.-abr. 2020. tab, graf
Article in Spanish | LILACS | ID: biblio-1345100


Resumen: Introducción: El abordaje anterior de cadera fue descrito en 1881, desde entonces se han realizado diversos estudios que han demostrado ventajas significativas frente a los abordajes posterior y lateral directo de cadera. Material y método: Se llevó a cabo un estudio descriptivo con casos continuos no probabilísticos en el Instituto de Ciencias Forenses de Octubre de 2015 a Julio de 2017. Se describió anatomía y distancias a los paquetes vasculonerviosos. Se realizó correlación de Pearson y Rho de Spearman. Resultados: Se efectuaron 22 disecciones, el nervio femorocutáneo fue identificado en nueve especímenes, la distancia promedio del nervio femorocutáneo lateral al intervalo de Smith-Petersen fue 11.4 mm, se identificó la arteria circunfleja lateral ascendente debajo del recto femoral hacia la región central del abordaje, se colocaron los separadores alrededor de la articulación coxofemoral sin lesionar estructuras vitales, el separador más riesgoso se ubicó en la pared anterior del acetábulo, debajo del músculo iliopsoas con distancia promedio de 28.25 mm al paquete femoral. A mayor edad mayor distancia a los paquetes neurovasculares p < 0.05. Conclusiones: Alto nivel de seguridad del abordaje anterior para artroplastía de cadera, las distancias a estructuras vitales presentan un margen razonable, en artroplastía de cadera ofrece adecuada exposición de la articulación, visión directa del acetábulo y disección quirúrgica atraumática.

Abstract: Introduction: The anterior hip approach was described since 1881, since then several studies have been conducted that have shown significant advantages over the posterior and lateral direct approaches of the hip. Material and method: We conducted a descriptive study with continuous non-probabilistic cases at the Institute of Forensic Sciences from October 2015 to July 2017. Anatomy and distances were described to the neurovascular bundles. Correlation of Spearman's Pearson and Rho was performed. Results: 22 dissections were made, the Femorocutaneous Nerve was identified in 9 specimens, the average lateral Femorocutaneous Nerve distance at Smith-Petersen interval was 11.4 mm, We identified the Ascending Lateral Circumflex artery under the femoral rectum towards the central region of the approach, the separators could be placed around the coxofemoral joint without injuring vital structures, the riskier separator we place it in the anterior wall of the acetabulum, below the Psoasyland with an average distance 28.25 mm to the femoral package. The older you go, the longer the neurovascular bundles were located p < 0.05. Conclusions: High level of safety of the previous approach for hip replacement, distances to vital structures have a reasonable margin, hip replacement offers adequate joint exposure, direct acetabulum vision and atraumatic surgical dissection.

Arthroplasty, Replacement, Hip , Hip Joint/surgery , Femur , Acetabulum/surgery
Article in Chinese | WPRIM | ID: wpr-879342


OBJECTIVE@#To investigate how to place the anteversion of acetabular prosthesis more reasonably in patients with lumbar degenerative kyphosis.@*METHODS@#A total of 122 patients with degenerative kyphosis of lumbar spine who underwent total hip arthroplasty from December 2017 to October 2019 were included and divided into experimental group and control group, 61 cases in each group. In experimental group, there were 25 males and 36 females, with a median age of 67.0 years;the median course of disease was 46.0 months;the functional pelvic plane with acetabular anteversion was set according to different types of pelvic anterior plane bracket. In control group, there were 27 males and 34 females, with a median age of 67.0 years;the median course was 42.0 months;in control group, the anteversion was set by the traditional method. The patients were followed up for 3 months. The operation time and blood loss were recorded. The incidence of infection and dislocation within 3 months was counted. Harris score before and 3 months after operation was recorded. Functional anteversion angle of standing position was measured 3 months after operation.@*RESULTS@#Compared with control group, there was no difference in operation time and blood loss between the two groups (P=0.918, 0.381);there was no infection between two groups within 3 months after operation;there was 1 case of hip joint dislocation in the control group and no dislocation in experimental group. There was no significant difference in Harris score before and after operation. Three months later, reexamination of pelvic standing radiographs showed that the number of patients with functional anteversion of acetabular prosthesis outside the safe area was less in experimental group thanin control group (@*CONCLUSION@#According to the preoperative evaluation and classification of patients, better functional anteversion of acetabular prosthesis can be obtained with the help of pelvic anterior plane reference bracket in hip arthroplasty with lumbar degenerative kyphosis.

Acetabulum/surgery , Aged , Arthroplasty, Replacement, Hip , Female , Hip Dislocation/surgery , Hip Joint , Hip Prosthesis , Humans , Kyphosis , Male , Retrospective Studies
Acta ortop. mex ; 32(6): 361-365, nov.-dic. 2018. graf
Article in Spanish | LILACS | ID: biblio-1248620


Resumen: El quiste óseo aneurismático es una tumoración benigna poco común, de aparición en la infancia generalmente y a nivel de extremidades. El tratamiento más habitual consiste en el curetaje y relleno con injerto. No obstante, localizaciones poco accesibles a la cirugía suponen un reto terapéutico. Se presenta el caso de un paciente de 11 años con cojera y dolor en cadera derecha sin antecedente traumático ni infeccioso. En los estudios de imagen con TAC y RM se evidencia una lesión lítica expansiva que ocupa todo el techo del acetábulo y pala ilíaca derecha, sugestiva de un quiste óseo aneurismático presentando fractura acetabular asociada. Se realizó una biopsia que confirmó el diagnóstico. Se trató mediante embolización guiada por angiografía debido al gran volumen y alto riesgo de fractura, después del curetaje y relleno con aloinjerto evolucionó satisfactoriamente y el paciente se encuentra asintomático al año de la intervención.

Abstract: The aneurysmal bone cyst is a benign rare tumor, which usually develops during childhood and it's more often found in limbs. The most accepted treatment consists in curetagge and filling with graft. However, certain locations may be inaccesible for surgery and represent therapeutical challenges. We present the case of an 11 year-old male patient with limping and right hip pain without any traumatic nor infectious record. In the image studies with CT and MRI a lytic and expansive lession was found in the upper part of the right acetabulum and right iliac wing, all of which suggested an aneurysmal bone cyst with an associated acetabular fracture. A biopsy was performed which confirmed the diagnosis. He was treated with a CT-guided embolization and, due to its size, curetagge and allograft filling afterwards. He was asymptomatic after1 year of follow-up.

Humans , Male , Child , Bone Cysts, Aneurysmal/surgery , Bone Cysts, Aneurysmal/diagnosis , Acetabulum/surgery , Biopsy , Tomography, X-Ray Computed , Ilium
Rev. Asoc. Argent. Ortop. Traumatol ; 83(4): 274-282, dic. 2018. []
Article in Spanish | LILACS, BINACIS | ID: biblio-984994


Introducción: El objetivo de este estudio es analizar nuestros resultados clinico-radiologicos con el uso de copas de tantalio trabecular para la reconstruccion de acetabulos complejos, tanto en cirugias primarias como en revisiones, y compararlos con series similares de otros autores. Materiales y Métodos: Se llevo a cabo una revision retrospectiva de una serie de 42 cirugias (29 revisiones y 13 artroplastias primarias) en 40 pacientes, entre marzo de 2010 y marzo de 2016. La serie incluyo a 20 mujeres y 20 hombres, con una edad promedio de 60 anos (rango 27-93). El seguimiento promedio fue de 37 meses (rango 12-84). Todos los pacientes fueron tratados con el mismo tipo de metal trabecular. Resultados: Al promedio de seguimiento mencionado la supervivencia del componente acetabular fue del 97,6%. Un paciente fue tratado con artroplastia de reseccion debido a una infeccion persistente. La tasa de complicaciones totales fue del 12% y el promedio del Harris Hip Score posoperatorio fue de 81,54 (rango 63,25-92,75). Conclusiones: Aunque se necesita un seguimiento mas prolongado, el uso de copas de metal trabecular logra resultados prometedores para el tratamiento de acetabulos complejos. Nivel de Evidencia: IV

Introduction: The purpose of this paper is to review of our clinical and radiological results with the use of trabecular metal cups for complex acetabular reconstruction, both in primary and revision total hip arthroplasties, and to compare our results with those in similar series from other authors. Methods: A series of 42 surgeries (29 hip revisions and 13 primary total hip arthroplasties) in 40 patients, between March 2010 and March 2016 was retrospectively reviewed. The series included 20 women and 20 men, with a mean age of 60 years (range 27-93). The mean follow-up was 37 months (range 12-84). All patients were treated with the same type of trabecular metal. Results: At the average follow-up, the survival of the acetabular component was 97.6%. One patient required resection arthroplasty due to persistent infection. Overall complication rate was 12% and the average postoperative Harris Hip Score was 81.54 (range 63.25-92.75). Conclusions: Despite further follow-up is needed, trabecular metal cup use for complex acetabular reconstruction shows promising results. Level of Evidence: IV

Adult , Middle Aged , Aged , Tantalum , Arthroplasty, Replacement, Hip/methods , Reconstructive Surgical Procedures/methods , Hip Joint/surgery , Acetabulum/surgery , Follow-Up Studies , Treatment Outcome
Rev. Asoc. Argent. Ortop. Traumatol ; 82(1): 28-39, mar. 2017. []
Article in Spanish | LILACS, BINACIS | ID: biblio-842507


Introducción: La indicación de las osteotomías acetabulares ha variado con el tiempo. En los últimos años con los trabajos de Ganz volvió el auge por estas técnicas. Se realizó un estudio comparativo entre la triple osteotomía y la osteotomía periacetabular para evaluar los resultados biomecánicos. Materiales y Métodos: Se evaluaron 12 casos con triple osteotomía y 12 casos con osteotomía periacetabular midiendo el desplazamiento del centro de rotación cefálico hacia lateral y anterior, el porcentaje de cabeza femoral cubierta, lateral y anterior, y los ángulos de inclinación y anteversión acetabular. Todos los datos fueron comparados con la cadera contralateral sin patología. Resultados: En la triple osteotomía, se comprobó un desplazamiento lateral de +2,9 mm y uno anterior de +2,47 mm del centro de rotación cefálico con respecto a la cadera contralateral. En la osteotomía periacetabular, la lateralización fue de +7,6 mm y la antepulsión, de +6,67 mm. El porcentaje promedio de cabeza femoral cubierta fue del 89% lateral y del 99,4% anterior con la triple osteotomía, y del 88% y 80%, respectivamente, con la osteotomía periacetabular. Los ángulos de orientación acetabular fueron de 39,4º de inclinación y 27,1º de anteversión con el primer procedimiento y de 45,5º y 23,11º, respectivamente, con el segundo. Conclusiones: Se comprobó que la conservación del puente óseo entre el ilíaco y el isquion limita la rotación para dar cobertura anterior y desplaza el centro de rotación cefálico hacia adelante; se prefiere la triple osteotomía cuando la falta de cobertura anterior de la cabeza femoral es importante. Nivel de Evidencia: IV

Introduction: The indication of acetabular osteotomies has changed over the time. In recent years, the boom for these techniques has emerged with the works of Ganz. We present a comparative study between the two techniques in terms of their biomechanical results. Methods: We evaluated 12 cases with triple osteotomy and 12 cases with periacetabular osteotomy by measuring the lateral and anterior displacement of the center of rotation of the femoral head. We also measured the percentage of lateral and anterior femoral head cover, and tilt and acetabular anteversion angles. All data were compared with the contralateral hip without pathology. Results: Lateral displacement of +2.9 mm and +2.47 mm, comparing the contralateral hip, was found with the triple osteotomy. In patients with periacetabular osteotomy we found a lateralization of +7.6 mm and an anterior flexion of +6.67 mm. The percentages of femoral head cover (average) were: lateral 89% and anterior 99.4% with triple osteotomy, and 88% and 80%, respectively, with the other procedure. The acetabular orientation angles were 39.4º of inclination and 27.1º of anteversion with triple osteotomy, and 45.5º and 23.11º, respectively, with periacetabular osteotomy. Conclusions: Preservation of bone bridge between the ilium and ischium restricts rotation to give anterior coverage and shifts the cephalic forward rotation, preferring the triple osteotomy in cases of severe anterior lack of coverage of the femoral head. Level of Evidence: IV

Child , Adolescent , Adult , Osteotomy/methods , Hip Joint/surgery , Acetabulum/surgery
Acta ortop. mex ; 30(3): 132-137, may.-jun. 2016. tab, graf
Article in Spanish | LILACS | ID: biblio-837772


Resumen: Introducción: El tratamiento quirúrgico de los tumores óseos malignos de pelvis con afectación periacetabular está en continua evolución. Las reconstrucciones acetabulares mejoran la calidad de vida sin perjudicar el control oncológico; sin embargo, no están exentas de complicaciones. Nuestro objetivo es describir los resultados funcionales y las complicaciones quirúrgicas de diferentes técnicas reconstructivas de la zona II de Enneking. Material y métodos: 15 pacientes fueron intervenidos de tumores óseos malignos de pelvis entre 2002 y 2012. Según la clasificación de Enneking y Dunham, hubo siete individuos con afectación periacetabular: tipo II-3, tipo I + II-1, tipo II + III-2, tipo I + II + III-1, que se evaluaron retrospectivamente. Cinco presentaron un condrosarcoma convencional y dos un osteosarcoma. Cuatro eran varones y tres mujeres, con una edad media de 43 años. El seguimiento mínimo fue 12 meses (6.14 años de media). En todos se realizó una resección oncológica con reconstrucción periacetabular: aloinjerto osteocondral masivo en tres sujetos, aloinjerto estructural más artroplastía de cadera en dos personas y dos con prótesis de anclaje ilíaco. Fueron evaluados clínica, radiológica y funcionalmente mediante la escala MSTS (1993). Resultados: La media MSTS a los seis meses de la cirugía fue 20.71 (69%). Complicaciones quirúrgicas aparecieron en cinco casos (71.4%): dos luxaciones de cabeza femoral nativa sobre aloinjerto, una desimplantación protésica aséptica y dos infecciones profundas. Hubo bordes libres intraoperatorios en todos los casos. Conclusiones: Las reconstrucciones acetabulares después de resecciones oncológicas en tumores óseos malignos parecen ofrecer buenos resultados funcionales. Sin embargo, sólo casos seleccionados deberían ser sometidos a intervenciones con alta tasa de complicaciones.

Abstract: Introduction: Surgical treatment of malignant bone tumors of the pelvis with periacetabular involvement is constantly evolving. Even though acetabular reconstructions improve quality of life without impairing cancer control, they are not complication free. Our purpose is to describe the functional outcomes and surgical complications of different reconstructive techniques for Enneking zone II tumors. Material and methods: Fifteen patients underwent surgery for malignant pelvic bone tumors between 2002 and 2012. Seven patients were retrospectively evaluated according to the Enneking and Dunham classification and were found to have periacetabular involvement, as follows: 3 were type II; 1 types I + II; 2 types II + III, and one types I + II + III. Five patients had a standard chondrosarcoma and 2 osteosarcoma. Patients included 4 males and 3 females; mean age was 43 years. The minimum follow-up period was 12 months (mean 6.14 years). All of them underwent cancer resection with periacetabular reconstruction: massive osteochondral allograft in 3 patients, structural allograft and hip arthroplasty in 2 patients, and prosthesis with iliac anchoring in 2. They were clinically, radiologically and functionally evaluated with the MSTS scale (1993). Results: The mean MSTS score 6 months after surgery was 20.71 (69%). Five patients (71.4%) had surgical complications: 2 dislocations of the native femoral head on the allograft; one aseptic prosthetic dislodgement, and 2 deep infections. All patients had free intraoperative borders. Conclusions: Acetabular reconstructions after oncologic resection for malignant bone tumors seem to provide good functional outcomes. However, only selected cases should undergo surgeries associated with a high complication rate.

Humans , Male , Female , Adult , Bone Neoplasms/surgery , Reconstructive Surgical Procedures , Pelvis/surgery , Quality of Life , Retrospective Studies , Treatment Outcome , Acetabulum/surgery
Artrosc. (B. Aires) ; 23(4): 141-147, 2016. []
Article in Spanish | LILACS, BINACIS | ID: biblio-834288


Objetivo: Evaluar el rol de las microfracturas artroscópicas como método de preservación articular en pacientes con lesión condral acetabular de espesor completo asociada a síndrome de fricción femoroacetabular (sffa). Material y métodos: Se efectuó un estudio retrospectivo, entre 2008-2011, de 19 pacientes con sffa y hallazgo artroscópico de lesión de cartílago acetabular tratados con corrección de la deformidad ósea, estabilización labral y microfracturas. Se incluyeron sólo pacientes con un seguimiento mínimo de 4 años. Se excluyeron pacientes con cirugías previas de cadera. La estadificación radiológica se realizó según tõnnis, clasificando a los pacientes en grupo 1 (tõnnis ≤1) y 2 (tõnnis >1). La evolución clínica se valoró según los escores de harris hip score modificada (mhhs) y womac. Se consideró falla terapéutica a la necesidad de una artroplastia total de cadera (ATC). Resultados: Se estudiaron 2 mujeres y 17 hombres con una edad promedio de 37 años (rango 22-45). El mhhs promedio fue de 68 preoperatorio y 89 postoperatorio (p=0.002). Similarmente, el womac promedio preoperatorio fue de 36, alcanzado 15 en el postoperatorio. A un promedio de 33 meses (rango 6-48), 3 pacientes requirieron una atc. La supervivencia articular fue del 84% a 4 años (ic95: 60.42-96.62). Ninguno de los pacientes del grupo 1 requirió una atc. Tres de los 6 pacientes del grupo 2 precisaron una ATC (p=0.02). Conclusión: El tratamiento con microfracturas artroscópicas fue efectivo en casos de lesión condral acetabular de espesor completo. Sin embargo, evidenció peores resultados en pacientes con signos radiológicos de artrosis avanzada previa a la artroscopia.

Introduction: To analyze the role of microfractures as a joint-preserving procedure in a series of patients with femoroacetabular impingement with advanced chondral damage diagnosed during hip arthroscopy. Methods: Between 2008-2011, we analyzed a retrospective cohort of 19 patients with full-thickness acetabular cartilage damage treated with arthroscopic osteoplasty, labral debridement and microfractures. Only patients with a minimum follow-up of 4 years were included. Exclusion criteria involved previous hip surgery. Patients were grouped upon tõnnis grading system on preoperative radiographs: “tõnnis 1 or less group (1)” and “tõnnis 2 or more group (2)”. Clinical outcome was measured in terms of mhhs and womac scores. Patients that required conversion to total hip arthroplasty were considered therapeutic failures. Results: We studied 2 female and 17 male with an average age of 37 years (range, 22-45). Mean mhhs improved from 68 preoperatively to 89 postoperatively. Likewise, preoperative womac was 36 and reached 15 postoperatively. Three patients with therapeutic failure underwent a tha at an average time of 33 months (range, 6-48). They all had tõnnis 2 on preoperative radiographs. None of the patients of group 1 required a tha (p=0.02). Survival was 84% at 4 years (ci95: 60.42-96.62). Conclusions: Arthroscopic microfractures for the treatment of advanced acetabular cartilage injuries obtained good clinical and radiological outcomes. However, worse results were seen in patients with progressive degenerative changes on prior radiographs.

Humans , Adult , Acetabulum/surgery , Acetabulum/injuries , Hip Joint/surgery , Arthroscopy/methods , Femoracetabular Impingement , Retrospective Studies , Treatment Outcome
Artrosc. (B. Aires) ; 21(4): 115-120, dic. 2014.
Article in Spanish | LILACS | ID: lil-742337


Introducción: El objetivo de este trabajo fue evaluar los resultados clinicos y la tasa de preservacion articular en pacientes a los que se le realizo una artroscopia de cadera por sindrome de friccion femoroacetabular (SFFA) con seguimiento minimo 5 anos. Se analizaron los factores predictivos de requerimiento para un reemplazo total de cadera (RTC). Materiales y métodos: Se evaluaron 42 pacientes consecutivos (15 mujeres, 27 hombres, edad promedio 38 anos) con SFFA. A todos se les realizo una artroscopia de cadera para estabilizar el dano articular (lesiones labrales y/o condrolabrales) y correccion de deformidades oseas asociadas (CAM y/o PINCER). Se realizo un seguimiento clinico. Ningun paciente fue perdido en el seguimiento. Se analizaron los factores predictivos de probabilidad de RTC. Resultados: A un seguimiento minimo de 5 anos la tasa de preservacion articular fue del 88,1 % (IC95 % 74,54 %-95,27 %). La probabilidad de evolucionar a una RTC en pacientes con escala radiografica Tonnis preoperatoria 0 y I fue del 0% (IC95 % 0%-14,76 %). La probabilidad de evolucionar a una RTC en pacientes con estadios Tonnis II y III fue del 33,3 % (IC95 %, 14,96 %-58,5 %). La diferencia entre ambos grupos fue significativa p= 0.003. La edad mayor o igual a 45 anos al momento de la artroscopia resulto ser un factor de riesgo significativo para evolucionar a una RTC (p=0.005). Conclusión: El tratamiento artroscopico del SFFA presenta resultados favorables a 5 anos en terminos de preservacion articular. Pacientes con artrosis preoperatoria avanzada y mayores de 45 anos tienen mayor riesgo de requerir una artroplastia de cadera en dicho lapso. Nivel de evidencia: IV. Tipo de estudio: Serie de casos...

Introduction: Purpose of this work is to evaluate the clinical results and the rate of joint preservation in a series of patients with Femoroacetabular Impingement (FAI) treated with hip arthroscopy at a minimum follow up of 5 years. The predictive factors for total hip arthroplasty (THA) requirement were analyzed. Material and methods: Between February 2008 and February 2009, 42 consecutive patients treated with a hip arthroscopy due to FAI syndrome were included. There were 15 women and 27 men with an average age of 38 years (range 23 to 56 years). The surgery involved joint damage stabilization (labral tears and/or condrolabral injuries) and correction of associated bony deformities (CAM and/or PINCER lesions). A prospective clinical follow up was made with no patient lost. We specifically addressed the need for THA. Predictive factors for THA were also analyzed. Results: At a minimum follow up of 5 years the rate joint preservation was 88.1% (CI95% 74,54%-95,27%). The probability of evolving to a THA in patients with radiographic preoperative Tonnis grades 0 and I was of 0% (CI95% 0%-14,76%). The probability of evolving to a THA in patients with preoperative Tonnis grades II and III was 33, 3% (CI95%14.96%-58.5%). Statistical significant difference was present between both groups (p= 0.003). Patients with an age of 45 years or more at the time of hip arthroscopy were at significant risk to evolve to THA (p=0.005). Conclusions: Hip arthroscopy for the treatment of patients with FAI syndrome presents favorable results regarding joint preservation at a minimum follow up of 5 years. Patients with advanced preoperative radiographic signs of osteoarthritis and those older than 45 years at the time of surgery have greater risk for requiring THA. Level of evidence: IV. Type of study: Case Series...

Adult , Acetabulum/surgery , Acetabulum/injuries , Hip Joint/surgery , Arthroscopy/methods , Osteoarthritis, Hip , Femoracetabular Impingement/surgery , Pain Measurement , Follow-Up Studies , Treatment Outcome
Acta ortop. mex ; 28(4): 212-217, jul.-ago. 2014. ilus
Article in Spanish | LILACS | ID: lil-730341


Introducción: La coxartrosis se considera una patología creciente; existiendo una demanda importante en la artroplastía total de cadera primaria en las próximas décadas, por lo tanto, incrementará la artroplastía de revisión de cadera; las indicaciones más comunes para la revisión son el aflojamiento de los componentes, inestabilidad de la cadera e infección, involucrando el componente acetabular en más de 50% de las revisiones. La pérdida ósea acetabular es de los mayores retos en la artroplastía de revisión de cadera. Objetivos: Determinar en estudios de imagen la osteointegración del aloinjerto mediante escalas radiográficas de AAOS, grado de funcionalidad de la cadera afectada mediante Harris Hip Score (HHS), valorar la satisfacción personal del paciente e identificar y describir las complicaciones. Material y métodos: Es un estudio observacional, longitudinal, retrospectivo, descriptivo, básico y clínico. Se seleccionaron expedientes de pacientes sometidos a cirugía de revisión protésica de cadera con aflojamiento protésico y defecto acetabular en quienes se haya utilizado aloinjerto óseo estructurado en el período de Enero 2007 a Abril 2012. Se realizó un seguimiento con controles a seis meses y un año. Resultados: Fueron 18 pacientes, 61% mujeres y 39% hombres, edad entre 47-79 años, con defecto acetabular grado IIB 44.4%, IIC 44.4% y III 11.2%, según clasificado por Paprosky, HHS de 27 puntos a 72.3 puntos a un año. Osteointegración al 100% en 9 pacientes, 75% en 6 y 50% en 3 pacientes. Un paciente con infección periprotésica aguda.

Introduction: Coxarthrosis is considered as an increasingly frequent condition that will lead to an important demand for primary total hip arthroplasty in the coming decades and this, in turn, will increase the number of revision hip arthroplasties. The most common indications for revision are component loosening, hip instability and infection, with involvement of the acetabular component in more than 50% of revision procedures. Acetabular bone loss is one of the major challenges of revision hip arthroplasty. Objectives: To determine, by means of imaging studies, allograft osseointegration using the AAOS radiographic scales, the performance grade of the affected hip using the Harris Hip Score (HHS), and patient personal satisfaction, as well as identify and describe complications. Material and methods: Observational, longitudinal, retrospective, descriptive, basic, clinical trial. The records of patients subjected to revision hip arthroplasty who experienced prosthetic loosening and had an acetabular defect treated with structured bone allograft between January 2007 and April 2012 were selected. Patients were followed-up at 6 and 12 months and compared with controls. Results: The total number of patients was 18, 61% females and 39% males. Age range was 47-79 years. The acetabular defect grade was as follows: 44.4% were IIB; 44.4% were IIC, and 11.2% were III, according to the Paprosky classification. The HHS went from 27 to 72.3 at one year. Osseointegration was 100% in 9 patients, 75% in 6, and 50% in 3 patients. One patient had acute periprosthetic infection. Conclusions: This method represents a good treatment option for acetabular defects, as it provides significant improvement according to the HHS and proper allograft osseointegration, which helps patients increase their bone stock for future revision procedures.

Aged , Female , Humans , Male , Middle Aged , Arthroplasty, Replacement, Hip , Acetabulum/surgery , Bone Transplantation , Osseointegration , Allografts , Longitudinal Studies , Reoperation , Retrospective Studies
Article in English | WPRIM | ID: wpr-100974


BACKGROUND: Several studies have shown that better placement of the acetabular cup and femoral stem can be achieved in total hip arthroplasty (THA) by using the computer navigation system rather than the free-hand alignment methods. However, there have been no comparisons of the relevant clinical advantages in using the computer navigation as opposed to the manual intraoperative measurement devices. The purpose of this study is to determine whether the use of computer navigation can improve postoperative leg length discrepancy (LLD) compared to the use of the measurement device. METHODS: We performed a retrospective study comparing 30 computer-assisted THAs with 40 THAs performed using a simple manual measurement device. RESULTS: The postoperative LLD was 3.0 mm (range, 0 to 8 mm) in the computer-assisted group and 2.9 mm (range, 0 to 10 mm) in the device group. Statistically significant difference was not seen between the two groups. CONCLUSIONS: The results showed good equalization of the leg lengths using both computed tomography-based navigation and the simple manual measurement device.

Acetabulum/surgery , Adult , Aged, 80 and over , Arthroplasty, Replacement, Hip/instrumentation , Body Weights and Measures , Female , Femur/surgery , Humans , Leg , Leg Length Inequality/surgery , Male , Middle Aged , Retrospective Studies , Surgery, Computer-Assisted , Young Adult
Article in English | WPRIM | ID: wpr-100973


BACKGROUND: Acetabular labral tear is a main cause of hip pain and disability, often requiring surgical treatment. Improvements of hip arthroscopic technique have produced positive outcomes after labral repair with arthroscopy. The purpose of this study was to determine clinical outcomes and patient satisfaction after arthroscopic repair of acetabular labral tear. METHODS: We interviewed 21 patients (10 men and 11 women; mean age, 36 years [range, 22 to 57 years]) with acetabular labral tears that had been repaired arthroscopically in terms of satisfaction of the procedure. In addition, clinical outcome was assessed using visual analog scale (VAS) score, University of California, Los Angeles (UCLA) activity, Western Ontario and McMaster Universities (WOMAC) osteoarthritis index, and Harris hip score, and radiologic outcome was assessed using serial radiography. The patients were followed for 24-50 months. RESULTS: The mean Harris hip score was 73 points (range, 64 to 84 points) preoperatively and 83 points (range, 66 to 95 points) postoperatively. Fifteen hips (71%) were rated excellent and good. The mean WOMAC osteoarthritis index and VAS scores were improved at final follow-up. UCLA activity at the latest follow-up improved in 16 patients. The Tonnis grade of osteoarthritis at the latest follow-up did not change in all patients. Eighteen of the patients (86%) were satisfied with the procedure. CONCLUSIONS: High rate of satisfaction after arthroscopic repair of acetabular labral tears is an encouraging outcome. Arthroscopic treatment of labral tears might be a useful technique in patients with hip pathologies, such as femoroacetabular impingement with labral tears.

Acetabulum/surgery , Adult , Arthroscopy , Asian Continental Ancestry Group , Female , Fibrocartilage/injuries , Hip Injuries/surgery , Hip Joint/surgery , Humans , Male , Middle Aged , Patient Satisfaction , Young Adult
Article in Spanish | LILACS | ID: lil-724372


Introducción: El objetivo principal es presentar la supervivencia del componente acetabular en pacientes con defectos graves reconstruidos con copas de metal trabecular combinadas con aloinjertos óseos impactados. Como objetivo secundario, se compararon estos resultados con los previamente obtenidos por los autores en defectos de similar gravedad utilizando anillos de reconstrucción y aloinjertos óseos. Materiales y Métodos: Se realizaron 20 cirugías de revisión en 19 pacientes (edad promedio 65 años), controlados, de forma prospectiva, con defectos acetabulares graves tipos 3A o 3B de Paprosky, por falla mecánica o infecciosa. El puntaje funcional promedio preoperatorio fue de 6,2 puntos, según la escala de Merle D´Aubigne. Siempre se utilizaron copas de metal trabecular y aloinjertos óseos impactados. Resultados: A los 30 meses de seguimiento promedio (rango 24-48 meses), la supervivencia del componente acetabular fue del 95% (IC = 75%-98%). Un paciente presentó un aflojamiento acetabular por infección profunda a las 16 semanas de la revisión y fue tratado con una artroplastia de resección. El puntaje funcional promedio, excluido el caso con aflojamiento posoperatorio, fue de 16,2 puntos. Se observó la incorporación de los aloinjertos óseos en todos los pacientes, salvo el caso con infección profunda. La comparación con nuestras series históricas reconstruidas con anillos de Kerboull o con anillos GAP arrojó resultados altamente favorables a favor de las copas de metal trabecular. Conclusiones: Las copas de metal trabecular asociadas a aloinjertos óseos impactados ofrecen una alternativa válida en cirugía de revisión acetabular con defectos graves del capital óseo. Este método se asocia a resultados más favorables que los obtenidos antes con anillos de reconstrucción.

Background: Although trabecular metal cups have been widely used with excellent survival rates at short to intermediate term follow-up, the literature combining these devices with impacted bone allografts is scarce. We evaluated early results of trabecular metal components and bone reconstruction with impaction grafting techniques in acetabular revisions associated with major bone loss. We also compared these results with our previous procedures using reconstruction rings and impaction grafting in similar bone deficiencies. Methods: Twenty cases presenting Paprosky type 3A or 3B mechanical or septic defects in 19 patients with an average age of 65 years were prospectively followed. The preoperative functional score according to Merle D’Aubigne scale was 6.2 points. All the cases were reconstructed with impacted bone allografts and trabecular metal cups. Results: At an average follow-up of 30 months (range 24-48), the survival rate of the acetabular component was 95% (CI=75-98%). One patient treated with a two staged protocol presented a septic failure 16 weeks after reimplantation and he was treated with a resection arthroplasty. The average postoperative functional score was 16.2 points. Bone allograft incorporation was observed in all cases, except the infected failure. The comparison with the historic controls using reconstruction rings was highly favorable for the trabecular metal cups. Conclusions: Impaction allografting and trabecular metal cups are a valid alternative in acetabular revision surgery presenting severe bone defects. This method is associated with better results compared to the previously obtained with bone allograft and reconstruction rings.

Adult , Middle Aged , Allografts , Acetabulum/surgery , Hip Joint/surgery , Arthroplasty, Replacement, Hip/methods , Bone Transplantation/methods , Follow-Up Studies , Prospective Studies , Prosthesis Failure , Reoperation
Rev. Asoc. Argent. Ortop. Traumatol ; 78(4): 190-198, dic. 2013.
Article in Spanish | LILACS | ID: lil-712011


Introducción: Un escenario cada vez más frecuente en la cirugía de revisión protésica de la cadera es hallar un cotilo no cementado fijo con una falla del componente modular de polietileno. Una completa revisión acetabular se presenta como demasiado agresiva cuando el componente metálico es salvable. Cementar un nuevo inserto de polietileno dentro del componente acetabular metálico osteointegrado es una alternativa. Comunicamos los resultados con esta técnica, y sus indicaciones, el modo de realización y las posibles limitaciones. Materiales y Métodos: Entre 2001 y 2011, se cementaron 40 componentes de polietileno dentro de copas no cementadas. Se evaluó radiológicamente y clínicamente a todos los pacientes. El motivo por el que se cementó un inserto fue falla o rotura de mecanismo de captura (11 casos; 27,5 por ciento), ganar estabilidad (18 casos; 45 por ciento) y falta de disponibilidad del inserto correspondiente (11 casos, 27,5 por ciento). Resultados: La tasa de duración del implante sin reoperación a 46 meses de seguimiento fue del 92 por ciento. Un paciente (2,4 por ciento) sufrió una infección, y dos presentaron inestabilidad (4,8 por ciento). No se presentaron aflojamientos hasta el último seguimiento. El puntaje preoperatorio y posoperatorio en la escala de Harris fue de 59 y 80, respectivamente. Conclusiones: Los datos técnicos por considerar para tener éxito son: utilizar un inserto de menor tamaño que el de la copa, cementar insertos texturizados y dejar siempre como mínimo un manto de cemento uniforme de 2 mm. Nuestros resultados preliminares cementando un inserto de polietileno dentro de una copa acetabular osteointegrada parecerían justificar esta técnica de revisión en pos de prevenir la pérdida de capital óseo asociada a la necesidad de recambio de copas osteointegradas.

Background: Modular liner component failure in fixed shells is an increasingly frequent scenario in prosthetic revision surgery. A complete acetabular revision is too aggressive when the metallic component can be saved. An alternative is to cement a liner within the fixed shell. We report our results using this technique, pointing out its indications, modus operandi and possible limitations. Methods: From 2001 to 2011, 40 polyethylene components were cemented within fixed shells. All patients were radiologically and clinically evaluated. The reasons for which a polyethylene component was cemented were: capture mechanism failure (11 cases, 27.5%), stability (18 cases, 45%) and liner unavailability (11 cases, 27.5 %). Results: The survival rate without reoperation after 46 months of follow-up was 92%. One case (2.4%) developed an infection, and two cases evidenced instability (4.8%). The survival rate for aseptic loosening was 100%. The pre-operative Harris score was of 59, increasing up to 80 in the post-operatory period. Conclusions: Technical data to be taken into account for success: use an undersized component, to cement textured components and to leave a uniform cement layer of feat least 2 mm. Our preliminary results cementing a polyethylene component within a fixed shell would seem to justify this revision technique to prevent the loss of bone stock associated with cementless cup revision.

Middle Aged , Aged, 80 and over , Arthroplasty, Replacement, Hip , Acetabulum/surgery , Cementation/methods , Hip Joint , Follow-Up Studies , Prosthesis Failure , Reoperation , Treatment Outcome