The posibility of computational modeling usage in the specific Dynamic Hip Screw complications analysis
Authors:
Maroš Hrubina 1,2; Zdeněk Horák 3; Miroslav Skoták 1; Radek Bartoška 4; Valér Džupa 4
Authors‘ workplace:
Ortopedické oddělení Nemocnice Pelhřimov, Pelhřimov
1; Katedra lékařských a humanitních oborů Kladno, Fakulta biomedicínského inženýrství ČVUT v Praze, Kladno
2; Laboratoř biomechaniky člověka, Fakulta strojní, ČVUT v Praze, Praha
3; Ortopedicko-traumatologická klinika 3. LFUK a FNKV v Praze, Praha
4
Published in:
Lékař a technika - Clinician and Technology No. 1, 2012, 42, 26-32
Overview
The aim of the study was to determine the relationship between the specific complications and the dynamic hip screw (DHS) placement in the femoral neck with relation to finite element method analysis. The implant associated specific complications are very diverse. We evaluated 336 dynamic hip screw osteosyntheses for pertrochanteric fractures in 324 patients. The program ABAQUS 6.9 was utilized for the development of the finite element model of the femur. Analyses were performed in 5 modeled situations corresponding to the screw location. Complication rate within the group of patients was 10% in general, with a reoperation rate of 4%. The highest risk of for an implant failure was associated with a location of the screw in the upper third of the neck. The finite element model analysis confirms our clinical experiences, when the optimal placement for a dynamic hip screw is in the middle third of the femoral neck. The technical mistake during the operation almost always leads to the implant failure with the need for the reoperation.
Keywords:
dynamic hip screw, finite element method, specific complications
Sources
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