A short stem with metaphyseal anchorage reveals a more physiological strain pattern compared to a standard stem : an experimental study in cadavaric bone

• Autorzy: Floerkemeier Thilo , Weltin Jennifer , Budde Stefan , Hurschler Christof , Windhagen Henning , Lewinski Gabriela von , Gronewold Jens

Identyfikatory

DOI

10.5277/ABB-01345-2019-02

• Języki publikacji: EN

Abstrakty

EN

The proposed advantages of short stem hip arthroplasties are bone preserving strategies and less soft tissue damage. Bone preserving strategies do not only include a more proximal resection of the femoral neck, but especially for short stem hip arthroplasties with predominantly metaphyseal fixation a presumed more physiologic load transfer and thus a reduction of stress-shielding. However, the hypothesized metaphyseal anchorage associated with the aforementioned benefits still needs to be verified. Unfortunately, mid- to long-term clinical studies are missing. Methods: Therefore, the METHA short stem as a short stem with proposed metaphyseal anchorage and the Bicontact® standard stem were tested biomechanically in three pairs of cadaveric femora while strain gauges monitored their corresponding strain patterns. Results: For the METHA stem, the strains in all tested locations including the region of the calcar were similar to conditions of cadaver without implanted stem. The Bicontact stem showed approximately half of strain of the non-implanted cadaveric femura with slightly increasing strain from proximal to distal. Conclusions: Summarizing, the current study revealed primary metaphyseal anchorage of the METHA short stem and a metaphyseal-diaphyseal anchorage of the Bicontact stem.

Słowa kluczowe

EN

short stem hip arthroplasty; METHA; standard stem hip arthroplasty; biomechanical testing; strain gauges; strain patterns

PL

artroplastyka stawu biodrowego; METHA; badania biomechaniczne; tensometr; wzorzec naprężenia

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Acta of Bioengineering and Biomechanics
• Rocznik: 2019
• Tom: Vol. 21, no. 2
• Strony: 153--159
• Opis fizyczny: Bibliogr. 25 poz., rys., tab.

Twórcy

autor

Floerkemeier Thilo

• Hannover Medical School, Department of Orthopaedic Surgery, Hannover, Germany

autor

Weltin Jennifer

• Hannover Medical School, Department of Orthopaedic Surgery, Hannover, Germany

autor

Budde Stefan

• Biomechanics and Biomaterials Laboratory, Hannover Medical School, Hannover, Germany

autor

Hurschler Christof

• Hannover Medical School, Department of Orthopaedic Surgery, Hannover, Germany

autor

Windhagen Henning

• Hannover Medical School, Department of Orthopaedic Surgery, Hannover, Germany

autor

Lewinski Gabriela von

• Hannover Medical School, Department of Orthopaedic Surgery, Hannover, Germany

autor

Gronewold Jens

• Diakovere Friederikenstift Hannover, Hannover, Germany

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).