Patent ID: 8523912
Filing Date: 2013-09-03
Classification: A61B,A61F

Abstract:
1. A dynamic stabilization system, comprising: a first bone fastener configured to couple to a first vertebra; a second bone fastener configured to couple to a second vertebra; a dampener system comprising: wherein movement of the first bone fastener towards the second bone fastener is configured to result in compression of the first elastic dampener member to resist movement of the first bone fastener toward the second bone fastener and is not configured to result in compression of the second elastic dampener member, and wherein movement of the first bone fastener away from the second bone fastener is configured to result in compression of the first elastic dampener member and compression of the second elastic dampener member to resist movement of the first bone fastener away from the second bone fastener, such that the first dampener member provides resistance to movement of the first bone fastener towards and away from the second bone fastener during use and the second dampener member provides resistance to movement of the first bone fastener away from the second bone fastener and does not provide substantial resistance to movement of the first bone fastener towards the second bone fastener during use.