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The Thrust Plate Hip Prosthesis: A Follow-Up of 15-20 Years With 102 Implants
Maja Kaegi1, Martin L Buergi2, Hilaire A C Jacob3
1Department of Orthopaedic Surgery, Canton's Hospital Graubünden, Chur, Switzerland.
Background:
Between November 1992 and January 1999, a cohort of 102 thrust plate hip prostheses was implanted.
Methods:
We now clinically and radiologically evaluate the remaining 73 prostheses with a mean follow-up of 17.2 years.
Results:
The Harris Hip Score increased from 51.4 points preoperatively to 94.3 points at the time of this follow-up. No further changes in the radiologic findings occurred since the first follow-up, published in 2005, conducted 2-8 years after implantation. Within 15 to 20 years after primary implantation of the 102 prostheses, 6 aseptic loosenings occurred, which correspond to a cumulated survival rate of 94.7% at 17 and 91.8% at 18 years.
Conclusion:
Although the thrust plate hip prostheses is no longer marketed, the biomechanical behaviour of this unique, clinically successful prosthesis deserves attention.
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