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Revista Española de Cirugía Ortopédica y Traumatología (English Edition)
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Inicio Revista Española de Cirugía Ortopédica y Traumatología (English Edition) Total Hip Arthroplasty in Patients over 70 Years of Age
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Vol. 51. Issue 4.
Pages 198-204 (July - August 2007)
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Vol. 51. Issue 4.
Pages 198-204 (July - August 2007)
Original papers
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Total Hip Arthroplasty in Patients over 70 Years of Age
La artroplastia total de cadera porosa en pacientes mayores de 70 años
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J. Sanz-Reig
Corresponding author
jsanzre@secot.es

Corresponding author: Service of Trauma and Orthopedic Surgery Hospital General de Elda. Carretera Elda-Sax s/n. 03600 Elda. Alicante, Spain.
, A. Lizaur-Utrilla, J. Plazaola-Gutiérrez, R. Cebrián-Gómez
Department of Orthopedic and Trauma Surgery. Elda General Hospital. Elda. Alicante. Spain
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Purpose

To assess the results of proximally porous-coated uncemented hip arthroplasty in patients over 70.

Materials and methods

Forty-one consecutive Perfecta (Orthomet)® type prostheses were analyzed in 38 patients of a mean age of 74 years. Initial diagnosis was primary osteoarthritis in 92.6% of them. Clinical assessment was carried out on the basis of the Harris Hip Score and reports of thigh pain; quality of life was also studied with the aid of the SF-12 questionnaire. A radiological assessment was made of signs of component incorporation, loosening or displacement and the presence of poly liner wear. Minimum post-op follow-up was 7 years and mean follow-up was 9.4 years.

Results

Mean clinical score at the end of follow-up was 76.6 points. X-ray assessment showed, for the acetabular component, 35 stable cups with bony incorporation (87.5%), 1 stable cup fibrous integration (2.5%) and 4 unstable cups (10%); as regards stems, 35 were stable with bony incorporation (87.5%), 2 were stable with fibrous integration (5%) and 3 were unstable (7.5%). There were 3 prosthetic dislocations, 1 superficial infection and 1 deep infection. Four acetabular components had to be revised. Although there were no stem revisions, 5 instances of loosening were considered failures as far as survivorship was concerned. Following the Kaplan-Meier method, survivorship of arthroplasties at 12.1 years was 73.1% (CI 95%, 92.7-61.8).

Conclusions

In 26.8% a revision was either performed or necessary, and only 73.5% of cases could boast a satisfactory clinical result. Implant failure was mainly related to technical errors at the level of the cup and to poor primary fixation as far as the stem was concerned. We consider that using proximally porous-coated hip prostheses is inappropriate for osteoarthritic patients over 70 years of age.

Key words:
hip
uncemented total arthroplasty
proximal porous coating
Objetivo

Evaluar el resultado de la artroplastia total de cadera no cementada con recubrimiento poroso proximal en pacientes mayores de 70 años.

Material y método

Se estudiaron 41 prótesis tipo Perfecta (Orthomet®) consecutivas en 38 pacientes con edad media de 74 años. El diagnóstico inicial fue artrosis primaria en el 92,6%. Para la valoración clínica se emplearon la escala de Harris, la presencia de dolor en el muslo y la calidad de vida según cuestionario SF-12. Radiológicamente se valoraron los signos de integración o aflojamiento de los componentes, la variación en sus posiciones y la evidencia de desgaste del núcleo de polietileno. El seguimiento postoperatorio mínimo fue de 7 años y el medio de 9,4 años.

Resultados

La puntuación clínica media fue de 76,6 al final del seguimiento. La valoración radiológica mostró a nivel del cotilo 35 estables con integración ósea (87,5%), 1 estable con integración fibrosa (2,5%) y 4 inestables (10%); a nivel del vástago 35 estables con integración ósea (87,5%), 2 estables con integración fibrosa (5%) y 3 inestables (7,5%). Hubo 3 luxaciones protésicas, 1 infección superficial y 1 infección profunda. Se revisaron 4 componentes acetabulares. Aunque no hubo revisiones del vástago, 5 casos de aflojamiento se consideraron fallos a efectos de supervivencia. Según el método de Kaplan-Meier, la supervivencia de la artroplastia a los 12,1 años fue del 73,1% (IC 95%, 92,7-61,8).

Conclusiones

En un 26,8% hubo revisión o necesidad de ella, y sólo el 73,5% de los casos presentaban un resultado clínico satisfactorio. Los fallos del implante se relacionaron principalmente con un defecto de la técnica a nivel del cotilo y a la mala fijación primaria a nivel del vástago. Consideramos inadecuada la utilización de prótesis de cadera con recubrimiento poroso proximal en pacientes artrósicos de más de 70 años.

Palabras clave:
cadera
artroplastia total no cementada
recubrimiento poroso proximal
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Copyright © 2007. Sociedad Española de Cirugía Ortopédica y Traumatología (SECOT). All rights reserved
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