Basic study of interference screw fixation stability in anterior cruciate ligament reconstruction / Abdul Halim Abdullah … [et al.]

Abdullah, Abdul Halim and Mahmud, Jamaluddin and Rashid, Helmi and Othman, Muhamad Fauzi and Mohd Saman, Alias (2012) Basic study of interference screw fixation stability in anterior cruciate ligament reconstruction / Abdul Halim Abdullah … [et al.]. [Research Reports] (Unpublished)

Abstract

The failure of anterior cruciate ligament (ACL) produces abnormal kinematics of the knee joint and leads to knee instability. Graft fixation is the critical issue in the ACL reconstruction especially during the primary post operative period. Interference screw has become as one of the most common used fixation methods for ACL reconstruction. The objectives of this research are to develop the mechanical concept and finite element model of interference screw fixation in ACL reconstruction. Also, to investigate the fundamental mechanical factors that contribute to the primary stability of the fixation such as material properties of screws, screws geometry and screw positioning and alignment. Finite element analysis are conducted and discussed with respect of stress distribution and total displacement. Results show that all investigated factors do influenced the primary stability of the ACL reconstruction. Proper stress distribution and total displacement at the interference screw fixation will enhance the primary stability of the ACL reconstruction. Interference screws with different materials will reflect the graft fixation in the tunnels. Screws with dedicated bio-absorbable materials are believed to represent the best choice in terms of displacement and stress development. In the second case study, the root of the thread of the interference screw is found out to develop more stress under loading compared to other regions. The results obtained show that the more thread the interference screw posses; the stronger the fixation will be and also, the fixation improved with a larger diameter of screw size. Finally, the 3rd study represent the effects of different positioning during the ACL reconstruction procedure. The maximum tunnel and screw deformation occur in 90 degree knee flexion fixation. Minimum tunnel and screw deformation was observed in 60 degree knee flexion fixation. The maximum tunnel and screw stress has been found in 90 degree knee flexion fixation and decreases proportionally to the load and angle of fixation to 60 degree. Outcomes of the study shows that the mechanical factors are important to predict the primary stability of the interference screw fixation of ACL reconstruction.

Metadata

Item Type: Research Reports
Creators:
Creators
Email / ID Num.
Abdullah, Abdul Halim
UNSPECIFIED
Mahmud, Jamaluddin
UNSPECIFIED
Rashid, Helmi
UNSPECIFIED
Othman, Muhamad Fauzi
UNSPECIFIED
Mohd Saman, Alias
UNSPECIFIED
Subjects: R Medicine > R Medicine (General) > Medical technology
R Medicine > R Medicine (General) > Computer applications to medicine. Medical informatics
Divisions: Universiti Teknologi MARA, Shah Alam > Research Management Centre (RMC)
Keywords: Abnormal kinematics; Knee joint; screw fixation stability
Date: 2012
URI: https://ir.uitm.edu.my/id/eprint/21260
Edit Item
Edit Item

Download

[thumbnail of LP_ABDUL HALIM ABDULLAH RMI 12_5.pdf]
Preview
Text
LP_ABDUL HALIM ABDULLAH RMI 12_5.pdf

Download (1MB) | Preview

Digital Copy

Digital (fulltext) is available at:

Physical Copy

Physical status and holdings:
Item Status:

ID Number

21260

Indexing

Statistic

Statistic details