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http://yadda.icm.edu.pl:80/baztech/element/bwmeta1.element.baztech-752953ba-bd84-47be-bfd1-1bf2184249e0

Czasopismo

Acta of Bioengineering and Biomechanics

Tytuł artykułu

Experimental analysis of insertion torques and forces of threaded and press-fit acetabular cups by means of ex vivo and in vivo measurements

Autorzy Vogel, D.  Rathay, A.  Teufel, S.  Ellenrieder, M.  Zietz, C.  Sander, M.  Bader, R. 
Treść / Zawartość
Warianty tytułu
Języki publikacji EN
Abstrakty
EN In THA sufficient primary implant stability is the precondition for successful secondary stability. Industrial foams of different densities have been used for primary stability investigations. The aim of this study was to analyse and compare the insertion behaviour of threaded and press-fit cups in vivo and ex vivo using bone substitutes with various densities. Methods: Two threaded (Bicon Plus®, Trident® TC) and one press-fit cup (Trident PSL®) were inserted by orthopaedic surgeons (S1, S2) into 10, 20 and 31 pcf blocks using modified surgical instruments allowing measurements of the insertion forces and torques. Furthermore, the insertion behaviour of two cups were analysed intraoperatively. Results:Torques for the threaded cups increased while bone substitute density increased. Maximum insertion torques were observed for S2 with 102 Nm for the Bicon Plus® in 20 pcf blocks and 77 Nm for the Trident® TC in 31 pcf blocks which compares to the in vivo measurement (85 Nm). The average insertion forces for the press-fit cup varied from 5.2-6.8 kN (S1) and 7.2-11.5 kN (S2) ex vivo. Intraoperatively an average insertion force of 8.0 kN was determined. Conclusions: Implantation behaviour was influenced by acetabular cup design, bone substitute and experience of the surgeon. No specific density of bone substitute could be favoured for ex vivo investigations on the implantation behaviour of acetabular cups. The synthetic bone blocks of high density (31 pcf) led to problems regarding cup orientation and seating. Therefore, bone substitutes used should be critically scrutinized in terms of the comparability to the in vivo situation.
Słowa kluczowe
PL panewka   gwintowanie   kość   kość syntetyczna  
EN insertion force   insertion torque   acetabular cup   press-fit   threaded   synthetic bone  
Wydawca Oficyna Wydawnicza Politechniki Wrocławskiej
Czasopismo Acta of Bioengineering and Biomechanics
Rocznik 2017
Tom Vol. 19, nr 3
Strony 155--163
Opis fizyczny Bibliogr. 25 poz., rys.
Twórcy
autor Vogel, D.
  • Biomechanics and Implant Technology Research Laboratory, Department of Orthopaedics, University of Rostock, Rostock, Germany, danny.vogel@med.unirostock.de
autor Rathay, A.
  • Biomechanics and Implant Technology Research Laboratory, Department of Orthopaedics, University of Rostock, Rostock, Germany
autor Teufel, S.
  • Biomechanics and Implant Technology Research Laboratory, Department of Orthopaedics, University of Rostock, Rostock, Germany
autor Ellenrieder, M.
  • Biomechanics and Implant Technology Research Laboratory, Department of Orthopaedics, University of Rostock, Rostock, Germany
autor Zietz, C.
  • Biomechanics and Implant Technology Research Laboratory, Department of Orthopaedics, University of Rostock, Rostock, Germany
autor Sander, M.
  • Department of Structural Mechanics, University of Rostock, Rostock, Germany
autor Bader, R.
  • Biomechanics and Implant Technology Research Laboratory, Department of Orthopaedics, University of Rostock, Rostock, Germany
Bibliografia
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Kolekcja BazTech
Identyfikator YADDA bwmeta1.element.baztech-752953ba-bd84-47be-bfd1-1bf2184249e0
Identyfikatory
DOI 10.5277/ABB-00723-2016-02