3+ 4/2002 - Společnost pro pojivové tkáně

SUMMARY
PŮVODNÍ PRÁCE ● ORIGINAL PAPER
MEZIOBRATLOVÉ IMPLANTÁTY II
INTERVERTEBRAL IMPLANTS II
SOCHOR M., TICHÝ P.
Institute of Human Biomechanics, Prague, Czechia
Sochor M,Tichý P. Intervertebral implants. The project aimed at designing implants
to substitute currently used titanium cages that, being very rigid, can penetrate into the vertebral
body, and thus unfavourably influence the healing process, which can result up to
arevision operation.The implant development was focused to design a structure behaving
better from the mechanical standpoint where modern materials play a basic role: the carbon-carbon
composite [Sochor M et al. Simulation of spinal segment loading with application
of cages, Pohybové ústrojí, 9, 2002, 1 + 2, s. 50 – 69] and the PolyEtherEtherKeton
(PEEK) polymer. FEM computational models, simulating the lumbar segment mechanics
(including L4 and L5,nucleus pulposus,anulus fibrosus,ligg. interspinalia,intertransverzalia,
flava,longitudinale anterior and longitudinale posterior,and processi articulares sup. et inf.),
were developed to compare the response of implants made of different materials
(Ti6Al4V alloy, C/C composite, and PEEK).The results obtained from this mathematical simulation
show a substantial reduction of the stress distribution in the bone tissue of the vertebral
bodies caused by a lower rigidity and anatomical shapes of the implants designed
while the implant supporting role were maintained.
Keywords: Biomechanics, Lumbar Spine, Implants, Degenerative Disc Disease, FEM
POHYBOVÉ ÚSTROJÍ, ročník 9, 2002, č. 3+4 67