Biomechanics of a lumbar interspinous anchor with anterior lumbar interbody fusion
作者： Dean G. Karahalios , Taro Kaibara , Randall W. Porter , Udaya K. Kakarla , Phillip M. Reyes
DOI: 10.3171/2009.10.SPINE09305
关键词:
摘要: Object An interspinous anchor (ISA) provides fixation to the lumbar spine facilitate fusion. The biomechanical stability provided by Aspen ISA was studied in applications utilizing an anterior interbody fusion (ALIF) construct. Methods Seven human cadaveric L3–S1 specimens were tested following states: 1) intact; 2) after placing at L4–5; 3) ALIF with ISA; 4) and screw/plate system; 5) removing (ALIF plate only); 6) 7) applying bilateral pedicle screws rods. Pure moments (7.5 Nm maximum) applied flexion extension, lateral bending, axial rotation while recording angular motion optoelectronically. Changes angulation as well foraminal height also measured. Results All instrumentation variances except alone reduced range of (ROM) significantly from normal all directions loading. most effective li...
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