TY - JOUR
T1 - Biomechanical changes in disc pressure and facet strain after lumbar spinal arthroplasty with charité™ in the human cadaveric spine under physiologic compressive follower preload
AU - Choi, Jong Il
AU - Kim, Se Hoon
AU - Lim, Dong Jun
AU - Ha, Sung Kon
AU - Kim, Sang Dae
N1 - Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2017
Y1 - 2017
N2 - Aim: Arthroplasty maintains the biomechanical features of a healthy disc, decreases the adjacent segment disease rate, and decreases the accelerated degeneration rate of the neighboring discs in traditional fusion procedures. However, there are only a few reports on adjacent disc pressure (DP) and facet strain (FS) after lumbar arthroplasty under a physiologic compressive preload. Material and Methods: Baseline DP and FS measurements were obtained from five intact cadaveric human lumbosacral spines for different modes of motion. DP was measured by inserting pressure transducer needle tips into the L3-L4 and L5-S1 discs. FS gauges were fixed on both sides of the laminae near the L3-L4, L4-L5, and L5-S1 facet joints. After SB Charité™ III implantation at the L4-L5 level, the measurements were repeated at preload and compared with those of the intact spine. Results: Under the preload condition, the central DP of the upper disc was decreased during extension and bending, and it significantly increased during rotation (p < 0.05). In the lower disc, the central DP insignificantly decreased during bending and increased during extension and flexion. A statistically significant increase in FS was observed during rotation at the operative facet (p < 0.05). Compared to the intact spine, all FS values were insignificantly decreased during lateral bending but increased during axial rotation. Conclusion: In an ex-vivo physiologic preload setting, the SB Charité™ III provided relatively inconsistent and sometimes increased DP or FS at the operative and adjacent levels after arthroplasty.
AB - Aim: Arthroplasty maintains the biomechanical features of a healthy disc, decreases the adjacent segment disease rate, and decreases the accelerated degeneration rate of the neighboring discs in traditional fusion procedures. However, there are only a few reports on adjacent disc pressure (DP) and facet strain (FS) after lumbar arthroplasty under a physiologic compressive preload. Material and Methods: Baseline DP and FS measurements were obtained from five intact cadaveric human lumbosacral spines for different modes of motion. DP was measured by inserting pressure transducer needle tips into the L3-L4 and L5-S1 discs. FS gauges were fixed on both sides of the laminae near the L3-L4, L4-L5, and L5-S1 facet joints. After SB Charité™ III implantation at the L4-L5 level, the measurements were repeated at preload and compared with those of the intact spine. Results: Under the preload condition, the central DP of the upper disc was decreased during extension and bending, and it significantly increased during rotation (p < 0.05). In the lower disc, the central DP insignificantly decreased during bending and increased during extension and flexion. A statistically significant increase in FS was observed during rotation at the operative facet (p < 0.05). Compared to the intact spine, all FS values were insignificantly decreased during lateral bending but increased during axial rotation. Conclusion: In an ex-vivo physiologic preload setting, the SB Charité™ III provided relatively inconsistent and sometimes increased DP or FS at the operative and adjacent levels after arthroplasty.
KW - Biomechanics
KW - Charité™
KW - Disc pressure
KW - Facet strain
KW - Lumbar spinal arthroplasty
KW - Physiologic compressive follower preload
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U2 - 10.5137/1019-5149.JTN.15649-15.4
DO - 10.5137/1019-5149.JTN.15649-15.4
M3 - Article
C2 - 27337240
AN - SCOPUS:85014822576
VL - 27
SP - 252
EP - 258
JO - Turkish Neurosurgery
JF - Turkish Neurosurgery
SN - 1019-5149
IS - 2
ER -