Long-term clinical-radiological evaluation of the CLS Spotorno stem | Revista Española de Cirugía Ortopédica y Traumatología (English Edition)

Article information

Abstract

Objective

To analyse the long-term results of the cementless, metaphyseal anchorage type, CLS Spotorno stem (Sulzer/Zimmer).

Material y methods

A review has been made of 166 patients in whom were implanted, primarily and consecutively, 189 CLS (CementLess Spotorno) (Sulzer/Zimmer) stems. The mean follow up was 13 years. The clinical parameters were assessed using a modified Harris scale, and the radiological ones according to the Gruen zones. The stem sinking measurements were also analysed.

Results

The mean follow up was 180 (156–228) months. Twelve patients (12 stems) died and 24 patients (29 stems) did not complete the follow up for different reasons. Thus the study was carried out on 130 patients (148 stems) who had the minimum follow up. The overall survival rate of the stem was 95% (confidence interval 89–98%) at the end of follow up. The Harris scale scores increased from 48 (9–76) points before surgery to 90 (63–100) points at the end of follow up.

Conclusions

CLS femoral stem obtains excellent long-term clinical and survival results.

Keywords:

Total hip prosthesis

Cementless prosthesis

CLS stem

Metaphyseal anchorage

Resumen

Objetivo

Analizar los resultados a largo plazo del vástago no cementado de anclaje metafisario tipo CLS Spotorno (Sulzer/Zimmer).

Material y métodos

Se han revisado 166 pacientes a los que se colocó, de forma primaria y consecutiva, 189 vástagos CLS (CementLess Spotorno) (Sulzer/Zimmer). El seguimiento mínimo ha sido de 13 años. Los parámetros clínicos se han valorado según la escala de Harris modificada, y los radiológicos según las zonas de Gruen. También se ha analizado la medición del hundimiento del vástago.

Resultados

El seguimiento medio ha sido de 180 meses (156–228), 12 pacientes (12 vástagos) habían fallecido y no se ha completado el seguimiento por diferentes motivos en 24 pacientes (29 vástagos). Así, el trabajo se ha realizado sobre 130 pacientes (148 vástagos) que tienen el seguimiento mínimo. La tasa de supervivencia global del vástago ha sido del 95% al final del seguimiento (intervalo de confianza 89–98). Las mediciones de la escala de Harris han pasado de 48 (9–76) puntos antes de la cirugía a 90 (63–100) puntos al final del seguimiento.

Conclusiones

El vástago femoral CLS obtiene unos excelentes resultados tanto clínicos como de supervivencia a largo plazo.

Palabras clave:

Prótesis total de cadera

Prótesis no cementada

Vástago CLS

Anclaje metafisario

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