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Inicio Revista Española de Cirugía Ortopédica y Traumatología (English Edition) Distribution of periprosthetic osteolysis in the hip: A study using magnetic res...
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Vol. 55. Issue 3.
Pages 193-203 (May - June 2011)
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Vol. 55. Issue 3.
Pages 193-203 (May - June 2011)
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Distribution of periprosthetic osteolysis in the hip: A study using magnetic resonance
Distribución de la osteólisis periprotésica en la cadera. Estudio con resonancia magnética
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A. Suárez-Vázqueza,
Corresponding author
asuarezv@telecable.es

Corresponding author.
, D. Hernández-Vaquerob, M. Del Valle López-Díazc, I. Pérez-Cotoa
a Servicio de Cirugía Ortopédica y Traumatología, Hospital San Agustín, Avilés, Asturias, Spain
b Departamento de Cirugía, Facultad de Medicina, Oviedo, Asturias, Spain
c Servicio de Radiodiagnóstico, Hospital San Agustín, Avilés, Asturias, Spain
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Abstract
Introduction

Magnetic resonance imaging (MRI) is useful in assessing bone and soft tissue lesions due to the production of wear particles. Our objective was to study the distribution of lesions in patients with one type of cementless acetabular component with this technique.

Material and methods

We included 40 total hip arthroplasty with press-fitted hydroxyapatite porous-coated cup and multiple optional screw holes performed over a mean of 13 years. We studied the presence, extent and continuity of the granulomatous lesion and osteolysis with MRI using special pulse sequences to reduce metal artefacts.

Results

One hip was not amenable to analysis. An isolated granulomatous lesion was found in 3 hips, associated osteolysis in 32, in the pelvis only in 10, in the femur only in 3 and in both segments in 19. By zones, the pelvis involvement was supra-acetabular ilium in 15, ischium-pubic branch in 24, ischium in 12 and retro-acetabular ischium in 21. Only two hips and two screws central lesions were isolated from the granulomatous mass.

Comments and conclusions

MRI osteolysis and soft tissue lesions secondary to wear to be studied. The distribution of osteolytic areas show a peripheral pattern typical of nonperforated acetabular cups frequently coexisting with proximal femoral involvement, highlighting few isolated lesions in the holes or around the implanted screws.

Keywords:
Hip arthroplasty
Osteolysis
Acetabular cups
Magnetic resonance
Resumen
Introducción

Con resonancia magnética es posible evaluar las lesiones óseas y de partes blandas secundarias a la producción de partículas de desgaste. Nuestro objetivo ha sido estudiar con este método la distribución de las lesiones en pacientes con un mismo tipo de componente acetabular no cementado.

Material y método

Se incluyeron 40 artroplastias de cadera no cementadas con un cotilo poroso revestido de hidroxiapatita y multiperforado para anclaje opcional de tornillos con una evolución media de 13 años. Mediante estudios de imagen con resonancia magnética utilizando secuencias especiales de pulsos para disminuir los artefactos metálicos, se estudió la presencia, extensión y continuidad de la lesión granulomatosa y de las zonas de osteólisis.

Resultados

Una cadera no fue susceptible de análisis. Se detectó lesión granulomatosa aislada en tres caderas y asociada a osteólisis en 32, sólo en pelvis en 10, sólo en el fémur en tres y en ambos segmentos en 19. En la pelvis la afectación fue, por zonas: ilion supraacetabular en 15 caderas, rama isquio-pubiana en 24, isquion en 12 e isquion retro-acetabular en 21. Solo dos caderas y dos tornillos presentaban lesiones centrales aisladas del resto del granuloma.

Comentarios y conclusiones

Con resonancia magnética ha sido posible estudiar las lesiones óseas y de partes blandas secundarias a desgaste. La distribución de las zonas de osteólisis ha seguido un patrón periférico propio de cotilos no perforados, destacando la existencia de escasas lesiones aisladas sobre los orificios o alrededor de los tornillos implantados coexistiendo con frecuencia afectación femoral proximal.

Palabras clave:
Artroplastia de cadera
Osteólisis
Cúpula acetabular
Resonancia magnetica
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Article from the best communications given at the EFORT SECOT Conference (Madrid 2010).

Copyright © 2011. Sociedad Española de Cirugía Ortopédica y Traumatología (SECOT). All rights reserved
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