Intervertebral prosthesis or disk prosthesis

摘要

An intervertebral prosthesis or disk prosthesis comprising a front side, a rear side, an upper side which can be placed on the base plate of vertebral body, a lower side which can be placed on the base plate of a vertebral body, a right side, a left side, a cavity which can receive a fluid hydraulic osteocementum, an opening in the cavity and several outlets out from the cavity. The total of the transversal surfaces of the outlets SV on the front side, the total of the transversal surfaces of the outlets SH on the rear side, the total of the transversal surfaces of the outlets SR on the right side and the total of the transversal surfaces of the outlets on the left side satisfy the following conditions: SL>SR or SR>SL or SH>SV or SV>SH.

主权项

1. A surgical method, comprising:
inserting an intervertebral implant into a disc space between upper and lower vertebrae; and delivering a flowable material into a cavity of the implant to cause the flowable material to flow asymmetrically out of the implant and into the surrounding disc space through openings formed in the implant; wherein the implant includes: a first lateral side being substantially straight and having at least one of the openings formed therein, the at least one opening of the first lateral side having a combined cross-sectional area A1; a second lateral side being substantially straight and having at least one of the openings formed therein, the at least one opening of the second lateral side having a combined cross-sectional area A2; wherein A1 is greater than A2 such that delivering the flowable material comprises delivering a greater amount of flowable material through the at least one opening of the first lateral side than through the at least one opening of the second lateral side.