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. 2007 Aug;127(6):397-401.
doi: 10.1007/s00402-007-0384-x. Epub 2007 Jun 30.

Proximal loading of the femur leads to low subsidence rates: first clinical results of the CR-stem

F Mazoochian  1 , F M Schrimpf, J Kircher, W Mayer, S Hauptmann, A Fottner, P E Müller, C Pellengahr, V Jansson
Affiliations

Proximal loading of the femur leads to low subsidence rates: first clinical results of the CR-stem

F Mazoochian et al. Arch Orthop Trauma Surg. 2007 Aug.

Abstract

Introduction: A new femoral stem was developed with a design that leads to compression of cancellous bone in the calcar region which results in proximal loading. The cross-sectional design of the implant provides rotational stability.

Materials and methods: In the first clinical investigation ten patients underwent uncemented total hip arthroplasty between January 1999 and May 1999 using the CR-stem((R)) (Implantcast GmbH, Buxtehude, Germany). Results were investigated using the Harris-hip-score (HHS) and antero-posterior and lateral radiographs. Migration was evaluated with the EBRA-FCA-method with a follow-up of 7 years.

Results: We demonstrated a mean subsidence rate of 2.23 +/- 1.13 mm 7 years after implantation thus providing basic data for extensive testing in a clinical environment.

Discussion: As small subsidence rates are regarded as predictor for superior long-term results in uncemented total hip arthroplasty according to the literature, the CR-stem shows promise for excellent long-term results.

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