The migration pattern of a cementless hydroxyapatite-coated titanium stem under immediate full weight-bearing: a randomized controlled trial using model-based RSA
(1) Background: High primary stability is important for the long-term survival of cementless femoral stems in total hip arthroplasty (THA). The objective of this study was to investigate the migration pattern of a hydroxyapatite-coated cementless hip stem developed for minimally invasive surgery usi...
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| Hauptverfasser: | , , , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
2 July 2020
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| In: |
Journal of Clinical Medicine
Year: 2020, Jahrgang: 9, Heft: 7 |
| ISSN: | 2077-0383 |
| DOI: | 10.3390/jcm9072077 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.3390/jcm9072077
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| Verfasserangaben: | Tobias Reiner, Robert Sonntag, Jan Philippe Kretzer, Michael Clarius, Eike Jakubowitz, Stefan Weiss, Volker Ewerbeck, Christian Merle, Babak Moradi, Stefan Kinkel, Tobias Gotterbarm and Sébastien Hagmann |
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| 245 | 1 | 4 | |a The migration pattern of a cementless hydroxyapatite-coated titanium stem under immediate full weight-bearing |b a randomized controlled trial using model-based RSA |c Tobias Reiner, Robert Sonntag, Jan Philippe Kretzer, Michael Clarius, Eike Jakubowitz, Stefan Weiss, Volker Ewerbeck, Christian Merle, Babak Moradi, Stefan Kinkel, Tobias Gotterbarm and Sébastien Hagmann |
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| 520 | |a (1) Background: High primary stability is important for the long-term survival of cementless femoral stems in total hip arthroplasty (THA). The objective of this study was to investigate the migration pattern of a hydroxyapatite-coated cementless hip stem developed for minimally invasive surgery using model-based radiostereometric analysis (RSA). (2) Methods: In this randomized controlled trial, 44 patients with an indication for cementless primary THA were randomly allocated to receive either the SL-PLUS MIA stem, developed for minimally invasive surgery, or the SL-PLUS stem (Smith & Nephew Orthopaedics, Baar, Switzerland) which served as a control group. Unlimited weight-bearing was permitted postoperatively in both groups. Model-based RSA was performed after six weeks and after 3, 6, 12 and 24 months postoperatively. (3) Results: Mean total stem subsidence at two-year follow-up was 0.40 mm (SD 0.66 mm) in the SL-PLUS group and 1.08 mm (SD 0.93 mm) in the SL-PLUS MIA group (p = 0.030). Stem subsidence occurred during the first six weeks after surgery, indicating initial settling of the stem under full weight-bearing. Both stem designs showed good osseointegration and high secondary stability with no further migration after initial settling. (4) Conclusions: Settling of a cementless straight femoral stem occurs during the first six weeks after surgery under full weight-bearing. Although initial stem migration was higher in the SL-PLUS MIA group, it had no influence on secondary stability. All implants showed good osseointegration and high secondary stability with no signs of implant loosening during this two-year follow-up period. | ||
| 650 | 4 | |a cementless total hip arthroplasty | |
| 650 | 4 | |a hydroxyapatite-coated femoral stem | |
| 650 | 4 | |a implant stability | |
| 650 | 4 | |a migration | |
| 650 | 4 | |a radiostereometric analysis | |
| 650 | 4 | |a RSA | |
| 650 | 4 | |a SL-PLUS MIA | |
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