Femoral bone preservation using short stems with metaphyseal fixation

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Martín Buttaro
Gabriel Martorell
Mauricio Quinteros
Fernando Comba
Gerardo Zanotti
Francisco Piccaluga

Abstract

Background: uncemented hydroxyapatite-coated stems with methaphyseal fixation have demonstrated excellent long-term results. Second generation of short stems has been developed in the 90’s with the purpose to preserve femoral bone at the femoral neck and diaphysis. However, the amount of bone that would be theoretically saved has not been well-established. To radiographically determine femoral bone preservation in a series of patients operated on with a short, neck preserving stem, we compared these results with the length of a templated conventional length, uncemented hydroxyapatite-coated stem.Methods: the first 50 short hydroxyapatite-coated uncemented stems (MiniHipTM, Corin, Cirencester, UK) were radiographically analyzed by two independent observers measuring the level of neck cut and the stem length. Then, these results were compared with the level of neck cut and stem length when a conventional, metaphysodiaphyseal stem (MetaFixTM, Corin, Cirencester, UK) was implanted using templates.Results: according to the radiographic results, short stems measured an average length of 79 mm (range 68-102). Conventional stems would have required 78 mm (range 47-94) more bone for fixation than short stems. This difference was observed in the neck cut (average 10 mm more distal with a conventional stems), as well as in the diaphysis (average 66 mm more distal with a conventional stems) (p <0.001). Conclusion: femoral bone preservation may be related to long-term benefits especially in young patients.   

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How to Cite
Buttaro, M., Martorell, G., Quinteros, M., Comba, F., Zanotti, G., & Piccaluga, F. (2014). Femoral bone preservation using short stems with metaphyseal fixation. Revista De La Asociación Argentina De Ortopedia Y Traumatología, 79(4), 232-236. https://doi.org/10.15417/299
Section
Clinical Research
Author Biography

Martín Buttaro, Centro de Cadera, Instituto de Ortopedia y Traumatología "Carlos E. Ottolenghi" Hospital Italiano de Buenos Aires.

Medico de planta, Centro de Cadera "Sir John Charnley"Servicio de Ortopedia y Traumatología "Carlos E. Ottolenghi"Hospital Italiano de Buenos Aires

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