If the front of the pocket is being used to help hold the ischials back on the seat, dont you get breakdown on the front of the ischials?
The pocket of the ISCH-DISH acts in tow ways to stabilize the pelvis. Primarily, it removes the ischials as pivot points by removing them as weigh bearing points. Therefore, the pelvis has less of a tendency to rock. Secondarily, should the pelvis rock back or slide forward, the front wall acts to block the movement. You would think that breakdown on the front of the ischials would occur. In our experience we arent seeing this. My explanation is that (a) the anterior ischium becomes a secondary weight bearing surface, (b) the anterior ischium is relatively flat and has a larger surface area than the inferior ischium, and (c) the wall of the pocket is only foam, so that the anterior ischium is contacting pressure dispersive material.
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