Amnon Yadin,Isador Harry Lieberman,Adi Dagan,Yoram Fleischmann
申请号：
US15234923
公开号：
US10390959B2
申请日:
2016.08.11
申请国别(地区):
US
年份:
2019
代理人:
摘要：
According to some embodiments of the invention, an intervertebral disc replacement includes a first layer having a lower surface for contacting a first vertebral bone, a second layer coupled to the first layer, the second layer comprising a plurality of compressible column springs, and a third layer coupled to the second layer, the third layer having an upper surface for contacting a second vertebral bone. Each of the plurality of compressible column springs comprises a plurality of stacked coils, and each of the plurality of stacked coils has a spring constant (K). At least one of the plurality of compressible column springs includes a first coil having a first spring constant and a second coil comprising a second spring constant, wherein the first spring constant is different from the second spring constant.
