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Influences of fit and fill following hip arthroplasty using a cementless short-stem prosthesis

  • Hip Arthroplasty
  • Published:
Archives of Orthopaedic and Trauma Surgery Aims and scope Submit manuscript

Abstract

Introduction

The purpose of this study consisted in examining the effects of fit and fill ratio of the Metha® prosthesis (BBraun, Aesculap, Tuttlingen, Germany) on radiological and clinical outcomes at a follow-up of 1 year.

Methods

40 patients were included. Fit and fill ratio measurements, radiological and clinical examinations were performed preoperatively and postoperatively. Correlations were established between fit and fill ratio, and potential factors like sex, age, body mass index, Harris Hip Score and changes of radiological signs.

Results

The whole cohort (100 %) had a tight fit and fill ratio (>0.8) at the proximal level and at each follow-up. “Champagne-flute” configuration provoked high distal tight-fit and fill ratio. Poor distal fit and fill ratio compared to the proximal and the mid-stem level was measurable at each follow-up (p < 0.05). Correlations between fit and fill ratio and preoperative femur configurations were detectable.

Conclusions

Implanting the Metha® prosthesis induces tight fit and fill ratio at the proximal and coated sections. Preoperative femur configuration should be considered to achieve best fit and fill situation and therefore excellent primary stability. In most cases “normal” and “stove-pipe” configurations provide good proximal fit and fill. Since “champagne-flute” configuration induces undesirable tight distal fit and fill ratio the size of the Metha® stem should be adequately increased to achieve a more proximal load transmission.

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Correspondence to Alexander Jahnke or Bernd Alexander Ishaque.

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Jahnke, A., Engl, S., Seeger, J.B. et al. Influences of fit and fill following hip arthroplasty using a cementless short-stem prosthesis. Arch Orthop Trauma Surg 135, 1609–1614 (2015). https://doi.org/10.1007/s00402-015-2302-y

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  • DOI: https://doi.org/10.1007/s00402-015-2302-y

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