title: Computed modeling of humeral mid-shaft fracture treated by bundle nailing.
abstract: Elastic bundle nailing is a method for simple humeral mid-shaft fracture osteosynthesis. The aim of our subsequent numerical simulations was to find out torsional and bending stiffness of an elastic bundle nailed humerus. Parametrical 3D numerical model was developed. The diameter of nails was the varying parameter of 1.8, 2.5, 3 and 4 mm. From our results can be seen that the bending stiffness in bundle nailing technique does not depend on nail diameter. On the contrary the torsional stiffness does highly depend on nail diameter. The dependency of the maximal stress on a nail diameter during bending and torsion of the humerus is non-linear. It can be seen that the higher diameter is used the higher stress occurs. Achieved results allow us for the recommendation of optimal nail diameter for this method, which lies between 2 and 3 mm.
authors.affiliation: a Third Faculty of Medicine, Department of Trauma Surgery , Charles University in Prague and Masaryk Hospital in Usti nad Labem , Usti nad Labem , Czech Republic.
authors.forename: Petr
authors.initials: P
authors.lastname: Obruba
authors.affiliation: b Department of Applied Mechanics , Technical University of Liberec , Liberec 1 , Czech Republic.
authors.forename: Lukas
authors.initials: L
authors.lastname: Capek
authors.affiliation: b Department of Applied Mechanics , Technical University of Liberec , Liberec 1 , Czech Republic.
authors.forename: Petr
authors.initials: P
authors.lastname: Henys
authors.affiliation: c Department of Trauma Surgery , Masaryk Hospital in Usti nad Labem , Usti nad Labem , Czech Republic.
authors.forename: Lubomir
authors.initials: L
authors.lastname: Kopp
mesh_terms: D000328:Adult; D001696:Biomechanical Phenomena; D001858:Bone Nails; D003198:Computer Simulation; D004548:Elasticity; D005260:Female; D005594:Fracture Fixation, Intramedullary / Q000379:methods*; D006801:Humans; D006810:Humeral Fractures / Q000503:physiopathology / Q000601:surgery*; D008875:Middle Aged; D013314:Stress, Mechanical; D014057:Tomography, X-Ray Computed; D054159:Torsion, Mechanical
keywords: Finite element method; biomechanics; bundle nailing; humerus fracture; stability