US 8,506,634 B2Granted

Intervertebral implant

AssigneeDePuy Synthes Products, Inc.

InventorsThierry Marnay, Boris Beyersdorff

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Abstract

In an intervertebral implant, having an upper part that has a support face for a vertebra and a lower part that has a support face for an adjacent vertebra, on each of which parts engagement elements, which are accessible from one side of the intervertebral implant, for a manipulation instrument are disposed, in order to minimize the structural height of the intervertebral implant upon insertion into an intervertebral space, it is proposed that the upper part and lower part each have protrusions and recesses aimed at the respectively other part, which are offset laterally from one another in such a way that when the upper part has been brought close to the lower part they mesh with one another; and that the engagement elements on the upper part and on the lower part are each disposed in protrusions of these parts in such a way that the engagement elements of the upper part and lower part are located side by side and at least partly overlap in the direction of the height of the intervertebral implant.

Claims40

Dependent claims

An intervertebral implant that is configured to be retained within an intervertebral disc space between adjacent first and second vertebrae, comprising:

a first part having a first outer surface adapted for engaging the first vertebra, a first inner surface opposing and facing away from the first outer surface having a concave indentation, and a first sidewall located between the first outer and inner surfaces extending around the circumference of the first part;
a second part having a second outer surface adapted for engaging the second vertebra, a second inner surface opposing and facing away from the second outer surface having a convex protrusion portion adapted to engage the indentation of the first part, and a second sidewall located between the second outer and inner surfaces extending around the circumference of the second part, wherein on the second inner surface, located between the convex portion and the second sidewall and located radially outward of the convex portion, there is a portion not adapted to engage the indentation of the first part;
wherein at least one of the first part concave indentation and the second part convex portion is a spherical surface;
wherein the first part and the second part each have a leading end and a trailing end opposite the leading end, and opposing lateral sides between the leading end and the trailing end;
wherein the first and second parts each have an elongated anchor that is elongated in a lengthwise direction from the trailing end to the leading end and having a height greater than its width on their respective first and second outer surfaces, and extending outwardly from the respective outer surfaces, each elongated anchor being located essentially along the center of the respective first and second outer surfaces between the lateral sides, the first and second part anchors being adapted to anchor the respective part in the respective vertebra;
and
wherein the first and second parts can be engaged in an insertion position with the respective leading ends forward and the lateral sides of the first part generally parallel with the lateral sides of the second part such that the elongated anchors lie in essentially the same vertical plane and wherein the first and second parts are adapted such that in the insertion position with the elongated anchors vertically oriented in the direction of the respective anchor height, the first sidewall is located in a different horizontal plane than the second sidewall.

4 more elements

An intervertebral implant configured to be inserted into an intervertebral space between adjacent first and second vertebrae, comprising:

a first platelike part having a substantially flat first outer surface adapted for engaging the first vertebra, a first inner surface opposing and facing away from the first outer surface having a concave indentation, and a first sidewall located between the first outer and inner surfaces extending around the circumference of the first part;
a second platelike part having a substantially flat second outer surface adapted for engaging the second vertebra, a second inner surface opposing and facing away from the second outer surface having a convex portion adapted to engage the indentation of the first part, and a second sidewall located between the second outer and inner surfaces extending around the circumference of the second part, wherein on the second inner surface, located between the convex portion and the second sidewall and located radially outward of the convex portion, there is a portion not adapted to engage the indentation of the first part;
wherein at least one of the first part concave indentation and the second part convex portion is a spherical surface;
wherein the first part and the second part each have a leading end and a trailing end opposite the leading end, and opposing lateral sides between the leading end and the trailing end;
wherein the first and second parts each have an anchor midline on their respective first and second outer surfaces extending in the direction from the trailing end to the leading end passing essentially through the center of the first and second outer surfaces between the lateral sides;
a first elongated anchor extending outwardly away from the first outer surface essentially along the anchor midline and where the first anchor is elongated in the direction of the anchor midline, the first anchor being adapted to anchor the first part in the first vertebra;
and
a second elongated anchor extending outwardly away from the second outer surface essentially along the anchor midline and where the second anchor is elongated in the direction of the anchor midline, the second anchor being adapted to anchor the second part in the second vertebra;
wherein the first and second parts can be engaged in an insertion position with the respective leading ends forward and the lateral sides of the first part generally parallel with the lateral sides of the second part such that the elongated anchors lie in essentially the same vertical plane;
wherein each of the first and second anchors has a height greater than its width, and wherein when the implant is adapted to be configured in the insertion position with the elongated anchors vertically oriented in the direction of the respective anchor height, the first sidewall is located in a different horizontal plane than the second sidewall.

7 more elements

An intervertebral implant configured to be inserted into an intervertebral space between adjacent first and second vertebrae, comprising:

a first part having a substantially flat first outer surface adapted for engaging the first vertebra and an opposite-facing inner surface that includes a concave portion, and a first sidewall located between the first outer and inner surfaces extending around the circumference of the first part;
a second part having a substantially flat second outer surface adapted for engaging the second vertebra, and an opposite-facing inner surface having a convex portion adapted to operatively engage the concave portion of the first part, and a second sidewall located between the second outer and inner surfaces extending around the circumference of the second part, wherein on the second inner surface, located between the convex portion and the second sidewall and located radially outward of the convex portion, there is a portion not adapted to engage the concave portion of the first part;
wherein at least one of the first part concave portion and the second part convex portion is a spherical surface;
wherein the first part and the second part have a leading end and a trailing end opposite the leading end, and opposing lateral sides between the leading end and the trailing end;
wherein the first and second parts each have first and second midlines extending in the direction from the trailing end to the leading end on the first and second outer surfaces, respectively, the first and second midlines passing essentially through the center, between the lateral sides, of the first and second outer surfaces, respectively;
a first anchor extending outwardly from the first outer surface, wherein said first anchor is elongated along and straddles said first midline;
and
a second anchor extending outwardly from the second outer surface, wherein said second anchor is elongated along and straddles said second midline;
wherein the first and second parts can be engaged in an insertion position with the respective leading ends forward and the lateral sides of the first part generally parallel with the lateral sides of the second part such that the elongated anchors lie in essentially the same vertical plane;
wherein each of the first and second anchors has a height greater than its width, and wherein the implant is adapted to be configured in the insertion position with the elongated anchors vertically oriented in the direction of the respective anchor height, the first sidewall is located in a different horizontal plane than the second sidewall.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/998,951Filed 30 Nov 2004 · continuation
Published: US 2005/0085917 A121 Apr 2005
Granted: 13 Aug 2013
Term ends: Not estimatedThe source records don’t support an estimate.

Classification32 codes

A61F 2/4425
Intervertebral or spinal discs, e.g. resilient: made of articulated components
A61F 2/30749
Accessories: fixation appliances for connecting prostheses to the body
A61F 2/30767
Joints: special external or bone-contacting surface, e.g. coating for improving bone ingrowth
A61F 2/442
For the spine, e.g. vertebrae or spinal discs: intervertebral or spinal discs, e.g. resilient

Family

PCT/EP99/04628Parent of this continuation · filed 2 Jul 1999
US 2005/0085917 A1Pre-grant publication · published 21 Apr 2005
Application10/018,402Parent of this continuation
US 6,936,071 B1Parent of this continuation
US 8,506,634 B2This patent

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