title: Posterior lumbar interbody cages do not augment segmental biomechanical stability.
abstract: The effect on stiffness of installing posterior threaded interbody cages at LA-L5 was evaluated using fresh human cadaveric spine specimens. The cages did not increase spine stiffness significantly in any tested range of motion. Supplemental posterior pedicular screw/rod instrumentation, however, significantly increased stiffness. The assertion that use of cages as isolated posterior implants improves stability may be invalid.
authors.affiliation: Department of Orthopaedic Surgery, University of Louisville, Kentucky, USA.
authors.forename: J R
authors.initials: JR
authors.lastname: Dimar
authors.forename: D J
authors.initials: DJ
authors.lastname: Beck
authors.forename: S D
authors.initials: SD
authors.lastname: Glassman
authors.forename: M J
authors.initials: MJ
authors.lastname: Voor
authors.forename: M
authors.initials: M
authors.lastname: Wang
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001696:Biomechanical Phenomena; D005260:Female; D006801:Humans; D008159:Lumbar Vertebrae / Q000601:surgery; D008297:Male; D008422:Materials Testing; D008875:Middle Aged; D013123:Spinal Fusion / Q000295:instrumentation*