Eleven-Year Results of the Anatomic Coated CFP Stem in Primary Total Hip Arthroplasty

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Abstract

There is a paucity of intermediate term results relating to short stem prostheses. The current study represents the longest follow-up results of the CFP prosthesis to the authors’ best knowledge. Between January 1999 and December 2000, all total hip arthroplasty patients (n = 149), treated with this anatomic neck preserving stem in the authors’ institution were enrolled in this study. After a mean follow-up time period of 11.2 years 117 patients were available for the follow-up examination. The mean HHS increased from 53 to 93. Overall, revision surgery was required in 11 patients (9.4%), with implant-associated complications noted in only five cases (4.3%). Aseptic loosening leading to implant removal was noted in four patients (3.4%). The current study's data suggest that the CFP implant, used in young patients undergoing primary total hip arthroplasty, is safe and provides excellent results after 11 years.

Section snippets

Demographic Data

All patients, treated with a total hip arthroplasty, using the femoral neck preserving prosthesis in the authors´ institution between January 1999 and December 2000, were enrolled in this study. Information about the patients’ medical history, age, gender and surgical indication was obtained from the patients’ medical records.

During this time period, a total of 149 patients were treated using the CFP stem prosthesis (Fig. 1). Five patients died and 27 patients were lost to follow-up and were

Results

After a mean follow-up time period of 11.2 years (range 9.3–14.5), 117 patients were available for follow-up. The mean HHS increased in a statistically significant fashion from 53 to 93 (range 53–98).

Overall, revision surgery was required in 11 patients (9.4%). In five cases (4.3%) the exact indication for the implant revision remained unclear (these patients were operated on in other hospitals). In five cases (4.3%), implant-associated complications occurred, to our best knowledge (Fig. 3).

Discussion

A previous study by the current authors related to the survivorship and complication rate of this femoral neck preserving prosthesis demonstrated promising results after a mean follow-up time period of six years. This is the first larger patient cohort study of patients undergoing total hip arthroplasty using the cementless CFP prosthesis with a follow-up time period of over 11 years. The overall implant-associated survival rate was 95.7%, in the current investigators’ consecutive series, which

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The Conflict of Interest statement associated with this article can be found at http://dx.doi.org/10.1016/j.arth.2012.10.013.

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