Long-Term Results of Total Hip Arthroplasty with the Cementless Spotorno (CLS) System

Background This study presents the long-term results of the Cementless Spotorno (CLS) total hip arthroplasty system and an analysis of factors associated with clinical and radiographic outcome. Methods We studied a series of 120 consecutive CLS arthroplasties in a young patient group (mean age at su...

Full description

Saved in:
Bibliographic Details
Published in:Hip international 2017-09, Vol.27 (5), p.465-471
Main Authors: Smeekes, Christiaan, de Witte, Pieter B., Ongkiehong, Bas F., van der Wal, Bart C.H., Barnaart, Alexander F.W.
Format: Article
Language:English
Subjects:
Adult
Aged
Arthroplasty, Replacement, Hip - methods
Case-Control Studies
Female
Follow-Up Studies
Forecasting
Hip Prosthesis
Humans
Male
Middle Aged
Osteoarthritis, Hip - diagnosis
Osteoarthritis, Hip - surgery
Polyethylene
Prosthesis Design
Radiography
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Background This study presents the long-term results of the Cementless Spotorno (CLS) total hip arthroplasty system and an analysis of factors associated with clinical and radiographic outcome. Methods We studied a series of 120 consecutive CLS arthroplasties in a young patient group (mean age at surgery: 55.9 ± 5.9 years). The Merle d'Aubigné-Postel score, polyethylene (PE) wear, and radiographic status were recorded during follow-up. Survival analyses, repeated-measures analysis of variance, and a nested case-control study were used for statistical evaluation. Results After a mean follow-up of 14.6 years (range 0.1-24.2 years, including revisions and lost to follow-up), 24 revisions had been performed, 16 of which for aseptic cup loosening. Kaplan-Meier survival analysis showed a 24-year survival of 72.8% (95% CI, 63.0%-82.6%) with revision for any reason as endpoint, and 80.1% (95% CI, 70.9%-89.3%) for revision for aseptic cup loosening. Mean final Merle d'Aubigné-Postel score was 16.1 points (range 7-18). Mean PE wear at final follow-up was 2.3 mm (range 0.6-6.8 mm). A higher rate of PE wear was associated with better clinical scores but also with revision for cup loosening. Factors associated with more PE wear were: younger age at surgery; 32 - mm head; longer follow-up; and steeper inclination angle. Conclusions Beyond 10 years, the CLS stem is reliable, but the high revision rate for aseptic cup loosening is concerning, specifically with better performing (cementless) alternatives available.
ISSN:1120-7000
1724-6067
DOI:10.5301/hipint.5000492