We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
EFFECT OF PEDICLE-SCREW FIXATION IN LUMBAR SPINE AT L3-L LEVEL: A FINITE ELEMENT STUDY.
- Authors
Biswas, Jayanta Kumar; Banerjee, Sreerup; Majumder, Santanu; Roy, Sandipan; Saha, Subrata; Roy Chowdhury, Amit
- Abstract
Deformities in the spine often require pedicle screw insertion, which alters the mechanical environment in the spine resulting in implant loosening and failure. This study examined the alteration of the state of strain at the bone-implant interface in the lumbar spine after pedicle screw insertion. Three-dimensional (3D) geometry of the lumber region (L1-S) and CAD model of pedicle screw was subjected at L3-L5 level to finite element (FE) analysis to examine the strain condition at the 6 selected locations at the bone-implant interface using different screw diameters (5 mm and 6 mm), implant materials (stainless steel and titanium), bone conditions (very strong, strong, normal, weak and very weak) and loading conditions (420 N, 490 N and 588 N). Screw diameter was observed to be the most crucial factor in determining the strain environment. The 6 mm diameter screw did not alter the strain environment significantly (p<0.05) as compared to un-implanted bones. Stronger bones, smaller loads and stainless steel did not alter strain environment significantly after the implantation. This preliminary analysis will help in understanding the effect of different physiological and implant parameter on the mechanical environment at the boneimplant interface and will help to design better pedicle screw implants.
- Subjects
PEDICLE flaps (Surgery); FINITE element method; BONE remodeling; BONE cells; BONE density; BONE growth
- Publication
Journal of the Mississippi Academy of Sciences, 2018, Vol 62, Issue 2 Supplement, p266
- ISSN
0076-9436
- Publication type
Article