Abstracts Posters SICOT-SOF meeting Gothenburg 2010 _2_

Poster
Topic: Arthroplasty - Knee
Abstract number: 26378
DOES A NEW KNEE DESIGN PERFORM AS WELL AS THE DESIGN IT
REPLACES?
Mats MOLT, Sören TOKSVIG-LARSEN
Hääsleholms Sjukhus, Hässleholm (SWEDEN)
Introduction: When introducing new joint replacement designs, it is difficult to predict
the clinical performance of the new design. Roentgen stereophotogrammetric
analysis (RSA) can serve as a predictor of late mechanical loosening for prostheses.
This randomized study was designed to evaluate new Triathlon total knee system
and compare the results to its predecessor, the Duracon system. Methods: Sixty
patients were consecutively randomized to receive either the Duracon (30 patients)
or the Triathlon total knee (30 patients). All components were cemented posterior
Cruciate Retaining versions. There were no statistically differences between the
patient demographics for the two groups (sex, age, BMI, side), neither the time for
surgery nor the anesthesiologic class (ASA) The hospital stay were 5 days.The
patients were followed postoperatively, 3, 12 and 24 months postoperatively. The
principal evaluation tool was RSA, measuring the migration, and the clinical results
were evaluated by KOOS and KSS. Results: There were no differences in rotation or
translation for the three coordinal axes. Neither were there any differences in the
Maximal Total Point Motion (MTPM) during the 2-years follow-up. The MTPM was
0.8.±5 vs 0.6±0.7 mm at 2 yr for the Duracon respectively the Triathlon groups.There
were no differences in the clinical results between the groups when using the KSS
and the KOOS. Discussion: The results of this study suggest that the new Triathlon
total knee system is at least clinically equivalent to the Duracon system.
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