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COMPUTER REPRESENTATION OF OSTEOSYNTHESIS STABILITY IN LOCKING PLATES USED FOR THE TREATMENT OF OSTEOPOROTIC PROXIMAL HUMERUS FRACTURES
Fabijan Čukelj
; University Hospital Split, Department of Traumatology, Split, Croatia
Josip Knežević
; University Hospital Split, Department of Traumatology, Split, Croatia
Janoš Kodvanj
; Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Croatia
Ante Bandalović
; University Hospital Split, Department of Traumatology, Split, Croatia
Marko Ostojić
; University of Mostar, School of Medicine, University Hospital Mostar, Department of Orthopaedics and Traumatology, Mostar, Bosnia and Herzegovina
Kanito Bilan
; University Hospital Split, Department of Traumatology, Split, Croatia
Arsen Pavić
; University Hospital Split, Department of Traumatology, Split, Croatia
Sažetak
Background: Proximal humerus fractures are represented as 4-5% of all fractures, with incidence notably growing with age.
Since surgical internal fixation in treatment of proximal humeral fractures is used, fractures of osteoporotic bone and choice of plate
for their osteosynthesis represent particular problem. The aim of the study was to test two locking plates: Philos plate with locking
screws with determinated direction, and Arthrex plate with poliaxial locking screws, using the finite element method.
Subjects and methods: This study used version 6.10 of Abaqus FEA software package for simulation and fine element analysis of
Philos and Artrex plates attached to the osteotomy models of proximal humerus with fracture gap at 0°, 10° and 20° in four types of
static load: abduction, adduction, axial compression and flexion. Simulation results of loads in abduction, adduction, axial loads and
flexion, were described with the total bone displacement (U) and maximum bone displacement in the fracture gap (Uf ).
Results: When examining the Philos plate in axial load on the bone with fracture gap angle from 0°, 10° and 20° no significant
differences between the results for the displacements were observed. Therefore, results for other loads are related to total
displacements of the bone only at the angle of 0°. Given that the results of the total bone displacement and maximum bone
displacement in the fracture gap with Artrex plate were mostly higher, for comparison with the results of bone displacement in Philos
plate it was taken that total bone displacement and maximum displacement in the fracture gap in Artrex plate represent 100% of the
total displacement. Philos plate showed 60.71% for abduction, 76.07% for adduction, 102.24% for axial loads and 79.59% for
flexion of total bone displacement in Artrex plate, and 60.48% for abduction, 76.07% for adduction, 96.05% for axial load and
79.96% for flexion of maximum displacement in the fracture gap in Artrex plate.
Conclusions: Osteosynthesis for osteoporotic fractures of proximal humerus with Philos plate in computer simulation proved to
be more stable than with Arthrex plate.
Ključne riječi
computer simulation; finite element method; proximal humerus fracture; osteoporotic fracture; locking compression plate
Hrčak ID:
265246
URI
Datum izdavanja:
5.11.2014.
Posjeta: 295 *