Stability of Uncemented Cups — Long-Term Effect of Screws, Pegs and HA Coating
| Autor: | Kjell G. Nilsson, Sead Crnalic, Volker T C Otten, Bo Nivbrant, Stephan M. Röhrl |
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| Rok vydání: | 2016 |
| Předmět: |
musculoskeletal diseases
030203 arthritis & rheumatology 030222 orthopedics medicine.medical_specialty Durapatite Ha coating genetic structures business.industry Follow up studies Dentistry Radiostereometric Analysis Surgery Bone screws 03 medical and health sciences 0302 clinical medicine Orthopedic surgery medicine Orthopedics and Sports Medicine Term effect sense organs business Total hip arthroplasty |
| Zdroj: | The Journal of Arthroplasty. 31:156-161 |
| ISSN: | 0883-5403 |
| DOI: | 10.1016/j.arth.2015.07.012 |
| Popis: | Screws, pegs and hydroxyapatite-coating are used to enhance the primary stability of uncemented cups. We present a 14-year follow-up of 48 hips randomized to four groups: press-fit only, press-fit plus screws, press-fit plus pegs and hydroxyapatite-coated cups. Radiostereometric migration measurements showed equally good stability regardless cup augmentation. The mean wear rate was high, 0.21 mm/year, with no differences between the groups. Seven hips had radiographical osteolysis but only in hips with augmented cups. Cups without screw-holes compared with cups with screw-holes resulted in better clinical outcome at the 14-year follow-up. Thus, augmentation of uncemented cups with screws, pegs, or hydroxyapatite did not appear to improve the long-term stability compared with press-fit only. |
| Databáze: | OpenAIRE |
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