The study was aimed at the clinical and biomechanical analyses of the sliding hip screw breakage with the use of finite element method. We have identified two patients with the sliding screw breakage. In the first patient, the biomechanical analysis revealed the reduced stress values σHMHnot exceeding the yield limit or strength limit of the implant. The yield limit was exceeded in second one. Clinical and biomechanical analyses have demonstrated that adherence to technical requirements of the appropriate osteosynthesis implementation is the principal condition of timely healing since it prevents the material failure.

Department of Orthopaedics Hospital Pelhrimov Pelhrimov Czech Republic

Department of Technical Studies College of Polytechnics Jihlava Czech Republic

Jessenius Faculty of Medicine in Martin Comenius University in Bratislava Martin Slovac Republic b Orthopaedic Clinic University Hospital Martin Martin Slovac Republic

Jessenius Faculty of Medicine in Martin Comenius University in Bratislava Martin Slovac Republic b Orthopaedic Clinic University Hospital Martin Martin Slovac Republic c Department of Orthopaedics Hospital Pelhrimov Pelhrimov Czech Republic

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$a Fatigue failure of the sliding hip screw - clinical and biomechanical analysis / $c L. Necas, M. Hrubina, Z. Cibula, J. Behounek, S. Krivanek, Z. Horak,

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$a The study was aimed at the clinical and biomechanical analyses of the sliding hip screw breakage with the use of finite element method. We have identified two patients with the sliding screw breakage. In the first patient, the biomechanical analysis revealed the reduced stress values σHMHnot exceeding the yield limit or strength limit of the implant. The yield limit was exceeded in second one. Clinical and biomechanical analyses have demonstrated that adherence to technical requirements of the appropriate osteosynthesis implementation is the principal condition of timely healing since it prevents the material failure.

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$a Hrubina, Maros $u a Jessenius Faculty of Medicine in Martin , Comenius University in Bratislava , Martin , Slovac Republic. b Orthopaedic Clinic , University Hospital Martin , Martin , Slovac Republic. c Department of Orthopaedics , Hospital Pelhrimov , Pelhrimov , Czech Republic.

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$a Cibula, Zoltan $u Jessenius Faculty of Medicine in Martin , Comenius University in Bratislava , Martin , Slovac Republic. b Orthopaedic Clinic , University Hospital Martin , Martin , Slovac Republic.

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$a Krivanek, Stanislav $u a Jessenius Faculty of Medicine in Martin , Comenius University in Bratislava , Martin , Slovac Republic. b Orthopaedic Clinic , University Hospital Martin , Martin , Slovac Republic.

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$a Horak, Zdenek $u d Department of Technical Studies , College of Polytechnics , Jihlava , Czech Republic.

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