Comparison of two hydroxyapatite-coated femoral stems: clinical, functional, and bone densitometry evaluation of patients randomized to a regular or modified hydroxyapatite-coated stem aimed at proximal fixation

The Journal of Arthroplasty
Judith C SluimerRudolph G T Geesink

Abstract

Clinical function, bone mineral density (BMD), and radiographs of 80 randomly allocated, hydroxyapatite-coated femoral stems of two differing lengths were studied for 2 years. The short stem was optimized for proximal fixation. The predictive value of bone densitometry was also studied. After 2 years, significantly more bone apposition and a higher BMD percentage were observed in Gruen zone 7 of the short stem. We conclude that stem design can be enhanced to achieve more proximal fixation. However, we found a higher incidence of pain with the short stem, indicating a trade-off between increased proximal fixation and diminished overall mechanical stability. No strong correlations between clinical function and radiographic evaluation of remodeling were found with BMD, suggesting that dual-energy x-ray absorptiometry has no predictive value for short-term clinical outcome.

References

May 17, 2000·The Journal of Bone and Joint Surgery. British Volume·S A McNallyJ P Walczak
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Citations

Jan 1, 2014·Medical Engineering & Physics·René H M ten BroekeRudolph G T Geesink
Mar 29, 2012·Computer Methods in Biomechanics and Biomedical Engineering·M ReimeringerP A Vendittoli
Apr 3, 2014·The Bone & Joint Journal·H Feyen, A J Shimmin
Nov 26, 2011·Journal of Biomechanics·Rui B RubenJoão Folgado
Nov 29, 2011·Journal of Biomedical Materials Research. Part B, Applied Biomaterials·Alireza Sayyidmousavi, Habiba Bougherara
Feb 11, 2014·Journal of Biomechanical Engineering·Pouria Tavakkoli AvvalHabiba Bougherara
Nov 21, 2019·Hip International : the Journal of Clinical and Experimental Research on Hip Pathology and Therapy·Satish BabuJustin Cobb
Nov 11, 2020·European Journal of Orthopaedic Surgery & Traumatology : Orthopédie Traumatologie·Masanobu HiraoTetsuya Jinno

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