Mechanical evaluation of locking compression plate
Loading...
Date
2018-05
Authors
Tong, Wen Le
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Locking Compression Plate, LCP has been widely used in the femoral shaft
fracture fixation. The clinical cases show that the failure of locking compression plate
is possible before the adequate healing of the fracture. The types of failures occur are
plate bending, plate breakage, bone failure at the screw and screw pulling out.
This research is focus on determining the deformation in y-direction, maximum
principal strain, minimum principal strain and strain in y-direction of locking
compression plate surface using Digital Image Correlation and Finite Element Analysis.
The results of two methods is compared to determine the accuracy of Digital Image
Correlation method. Relative error will be calculated to determine the accuracy of
Digital Image Correlation results. Besides, Finite Element Analysis is used to analyse
the stress distribution of transverse fracture femoral shaft to determine the stress
distribution at bone screw interface.
The relative errors between Digital Image Correlation and Finite Element
Analysis results are less than 15%, meaning that Digital Image Correlation is applicable
to determining deformation and strain distribution of locking compression plate surface.
Besides, the Finite Element Analysis shows that the stress distribution at first screw and
second screw bone interfaces are 43.1 MPa and 77.5 MPa while the stress at other
region of the bone is 2.9 MPa.