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Titolo:
Biomechanics of Grade I degenerative lumbar spondylolisthesis. Part 2: Treatment with threaded interbody cages/dowels and pedicle screws
Autore:
Cagli, S; Crawford, NR; Sonntag, VKH; Dickman, CA;
Indirizzi:
St Josephs Hosp & Med Ctr, Barrow Neurol Inst, Div Neurol Surg, Spinal Biomech Res Lab, Phoenix, AZ USA St Josephs Hosp & Med Ctr Phoenix AZ USA iomech Res Lab, Phoenix, AZ USA
Titolo Testata:
JOURNAL OF NEUROSURGERY
fascicolo: 1, volume: 94, anno: 2001, supplemento:, S
pagine: 51 - 60
SICI:
0022-3085(200101)94:1<51:BOGIDL>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
FIXATION; FUSION; EFFICACY; SURGERY;
Keywords:
degenerative spondylolisthesis; anterior lumbar interbody fusion; threaded interbody cages; biomechanics;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
15
Recensione:
Indirizzi per estratti:
Indirizzo: Dickman, CA Barrow Neurol Inst, 350 W Thomas Rd, Phoenix, AZ 85013 USA Barrow Neurol Inst 350 W Thomas Rd Phoenix AZ USA 85013 13 USA
Citazione:
S. Cagli et al., "Biomechanics of Grade I degenerative lumbar spondylolisthesis. Part 2: Treatment with threaded interbody cages/dowels and pedicle screws", J NEUROSURG, 94(1), 2001, pp. 51-60

Abstract

Object. The authors sought to determine the biomechanical effectiveness ofthreaded interbody cages or dowels compared with that achieved using pedicle screw instrumentation in resisting Grade I lumbar spine degenerative spondylolisthesis. Methods. Thirty-three levels obtained from seven cadaveric lumbar spines were instrumented with cages or dowels, pedicle screw/rod instrumentation, or both. Entire specimens were loaded with nonconstraining torques. Each level was loaded with anteroposterior shear forces while an optical system wasused to measure the specimen's motion at individual levels. Pedicle screw/rods outperformed interbody cages and dowels in treating spondylolisthesis. Cages or dowels alone provided only moderate biomechanical stability, and their effectiveness depended heavily on the integrity of theligaments and remaining annulus, whereas the success of pedicle screw fixation relied predominantly on the integrity of the bone for solid fixation. Little biomechanical difference was demonstrated between cages and dowels; both devices were susceptible to loosening with cyclic fatigue. Conclusions. Biomechanically, cages or dowels alone were suboptimal for treating lumbar spondylolisthesis, especially compared with pedicle screw/rods. Threaded cages or dowels used together with pedicle screws/rods created the most stable construct.

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Documento generato il 09/07/20 alle ore 13:02:13