Ten-year follow-up of a cemented tapered stem

Klasan, Antonio; Şen, Ahmet; Dworschak, Philipp; El-Zayat, Bilal Farouk; Ruchholtz, Steffen; Schuettler, Karl F.; Schmitt, Jan; Heyse, Thomas J.

doi:10.1007/s00402-018-3002-1

Cited by 3 publications

(2 citation statements)

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“…Both of these aspects increase the surface contact area between the implant and the bone and have been utilized in designing the stem used in this study (Klasan et al. 2018), when compared with the implant it was based on, the Corail stem (DePuy, Raynham, MA, USA). These 2 stems have not been tested against each other.…”

Section: Discussionmentioning

confidence: 99%

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Cementing of the hip arthroplasty stem increases load-to-failure force: a cadaveric study

Klasan¹,

Bäumlein²,

Bliemel³

et al. 2019

Acta Orthopaedica

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Background and purpose — To date, there is not a single clinical or mechanical study directly comparing a cemented and a cementless version of the same stem. We investigated the load-to-failure force of a cementless and a cemented version of a double tapered stem.Material and methods — 10 femurs from 5 human cadaveric specimens, mean age 74 years (68–79) were extracted. Bone mineral density (BMD) was measured using peripheral quantitative computed tomography. None of the specimens had a compromised quality (average T value 0.0, –1.0 to 1.4). Each specimen from a pair randomly received a cemented or a cementless version of the same stem. A material testing machine was used for lateral load-to-failure test of up to a maximal load of 5.0 kN.Results — Average load-to-failure of the cemented stem was 2.8 kN (2.3–3.2) and 2.2 kN (1.8–2.8) for the cementless stem (p = 0.002). The cemented version of the stem sustained a higher load than its cementless counterpart in all cases. Failure force was not statistically significantly correlated to BMD (p = 0.07).Interpretation — Implanting a cemented version of the stem increases the load-to-failure force by 25%.

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Section: Discussionmentioning

confidence: 99%

“…For instance, the cemented version of the stem used in our study is not available in the United States despite showing excellent clinical results (Klasan et al. 2018). Further studies with other stems available in both versions in a clinical and a mechanical setting are needed to provide this information.…”

Section: Discussionmentioning

confidence: 99%