ผลของอุปกรณ์ยึดตรึงกระดูกซียูที่มีต่อแรงดันในหมอนรองกระดูกสันหลังช่วงเอวจากศพ / ชินดนัย หงสประภาส = The effects of the C.U. interspinous device on intradiscal pressures in cadaveric lumbar spine / Chindanai Hongsaprabhas
Spinal fusion remains to be the standard treatment for degenerative lumbar diseases but also has some disadvantages about loss of motion segments and adjacent syndrome. Dynamic stabilization using interspinous distractive devices becomes more popular by reducing these disadvantages. The New design of this device had been tested in this study. We conducted the experimental study in 5 cadaveric specimens using L1-L5 spines. All specimens were loaded in neutral, flexion and extension .Needle pressure sensor was used to measure intradiscal pressure at anterior annulus, nucleus pulposus, posterior annulus of the level L2/3, L3/4, L4/5. Cadaveric specimens were tested in 4 conditions (intact spine, destabilized spine , spine with new device at L3/4, spine with fusion at L3/4) respectively. By using the new interspinous device, pressure in anterior annulus was non-significantly increased. It also decreased intradiscal pressure at the L3/4 disc in the posterior annulus and nucleus in all positions but nonstatistical significant. The pressures at the adjacent discs were also not affected by this device compared with fusion group. We concluded that this new design of dynamic stabilization provide support for the adjacent level intradiscal pressure but the result for the instrumented level is still unremarkable.
