The primary stability of the femoral component in cemented single and twin peg Oxford unicompartmental knee arthroplasty under adverse conditions
Aims - - The cemented Oxford unicompartmental knee arthroplasty (OUKA) features two variants: single and twin peg OUKA. The purpose of this study was to assess the stability of both variants in a worst-case scenario of bone defects and suboptimal cementation. - - Methods - - Single and twin pegs...
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| Hauptverfasser: | , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
7 Feb 2022
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| In: |
Bone & joint research
Year: 2022, Jahrgang: 11, Heft: 2, Pages: 82-90 |
| ISSN: | 2046-3758 |
| DOI: | 10.1302/2046-3758.112.BJR-2020-0507.R2 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1302/2046-3758.112.BJR-2020-0507.R2 Verlag, lizenzpflichtig, Volltext: https://online.boneandjoint.org.uk/doi/full/10.1302/2046-3758.112.BJR-2020-0507.R2 
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| Verfasserangaben: | J.A. Eckert, R.G. Bitsch, R. Sonntag, T. Reiner, M. Schwarze, S. Jaeger |
| Zusammenfassung: | Aims - - The cemented Oxford unicompartmental knee arthroplasty (OUKA) features two variants: single and twin peg OUKA. The purpose of this study was to assess the stability of both variants in a worst-case scenario of bone defects and suboptimal cementation. - - Methods - - Single and twin pegs were implanted randomly allocated in 12 pairs of human fresh-frozen femora. We generated 5° bone defects at the posterior condyle. Relative movement was simulated using a servohydraulic pulser, and analyzed at 70°/115° knee flexion. Relative movement was surveyed at seven points of measurement on implant and bone, using an optic system. - - Results - - At the main fixation zone, the twin peg shows less relative movement at 70°/115°. At the transition zone, relative movements are smaller for the single peg for both angles. The single peg shows higher compression at 70° flexion, whereas the twin peg design shows higher compression at 115°. X-displacement is significantly higher for the single peg at 115°. - - Conclusion - - Bony defects should be avoided in OUKA. The twin peg shows high resilience against push-out force and should be preferred over the single peg. - - Cite this article: Bone Joint Res 2022;11(2):82-90. |
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| Beschreibung: | Gesehen am 03.05.2022 |
| Beschreibung: | Online Resource |
| ISSN: | 2046-3758 |
| DOI: | 10.1302/2046-3758.112.BJR-2020-0507.R2 |