US 2017/0281362 A1Published application

Intervertebral Prosthesis or Disk Prosthesis

AssigneeDePuy Synthes Products, Inc.

InventorsBeat Lechmann, Robert Frigg, Roger Buerki

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Abstract

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.

Claims9

Dependent claims

Intervertebral prosthesis or disk prosthesis (1) in the form of a rectangular hollow body with a front side (2), a rear side (3), an upper side (4) suitable for resting against the base plate of a vertebral body, a lower side (5) suitable for resting against the base plate of a vertebral body, a right side (6), a left side (7), a cavity (8) suitable for accommodating flowable osteocementum (20), an inlet opening (9) into the cavity (8) and several outlet openings (10;

11;
12;
13) for the flowable osteocementum from the cavity (8), the sum of the cross-sectional surfaces of the outlet openings (10) emerging from the front side (2) being SV, the sum of the cross-sectional surfaces of the outlet openings (11) emerging on the rear side (3) being SH, the sum of the cross-sectional surfaces of the outlet openings (12) emerging from the right side (3) being SR, and the sum of the cross-sectional surfaces of the outlet openings (13) emerging from the left side (7) being SL, characterized in that the outlet openings (10;
11;
12;
13) are dimensioned so that, when a flowable osteocementum (20) is supplied through the inlet opening (9) into the cavity (8) either:
A) the amount of osteocementum KL, emerging through SL is larger or smaller than the amount of osteocementum KR emerging through SR or
B) the amount of osteocementum KH, emerging through SH is larger or smaller than the amount of osteocementum KV emerging through SV.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/623,707Filed 15 Jun 2017
Priority: 4 Sep 2007
Published: 5 Oct 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification15 codes

A61F 2/447
For the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages: substantially parallelepipedal, e.g.…
A61F 2/30771
Special external or bone-contacting surface, e.g. coating for improving bone ingrowth: applied in original prostheses, e.g. holes or grooves
A61F 2/441
For the spine, e.g. vertebrae or spinal discs: made of inflatable pockets or chambers filled with fluid, e.g. with hydrogel
A61F 2/442
For the spine, e.g. vertebrae or spinal discs: intervertebral or spinal discs, e.g. resilient

Family

Application11/587,723Continuation · filed 4 Sep 2007
Application14/638,196Continuation · filed 4 Mar 2015
Application15/623,707Continuation
US 10,085,851 B2Related patent
US 2008/0133015 A1Published application
US 2015/0173913 A1Published application
US 8,992,618 B2Related patent
US 9,700,432 B2Related patent
US 2017/0281362 A1This patent

From the US filing history. Foreign family members aren’t listed.

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