Bone implants and methods
AssigneeZimmer Spine, Inc.
InventorsDavid A. Hanson, Ross A. Longhini, Daniel D. McPhillips, Steven J. Seme
Life of this patent
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Abstract
Implants, instruments and methods for bone fusion procedures are disclosed. In some embodiments, the implants are particularly advantageous for use between opposing vertebral bodies to facilitate stabilization or arthrodesis of an intervertebral joint. The implants include, at least, a support component that provides structural support during fusion. In a typical embodiment, the implants also include a growth component. A growth component provides an environment conducive to new bone growth between the bones being fused. Several unique configurations to enhance fusion, instruments for insertion and methods for insertion are also disclosed.
Claims22
A bone implant comprising:
- a support member sized for intervertebral implantation, the support member defining a cavity having an open end positioned opposite from a closed end;
- and
- a growth member sized to be inserted into the cavity of the support member through the open end of the cavity after implantation of the support member into an intervertebral space, the growth member having a pre-manufactured shape that generally complements a shape of the cavity,
- wherein the growth member includes oppositely positioned bone engagement surfaces separated by a thickness, and wherein the growth member also includes planar side wall surfaces that extend between the bone engagement surfaces.
A bone implant comprising:
- a support member size for intervertebral implantation, the support member defining a cavity having an open end positioned opposite from a closed end;
- and
- a growth member sized to be inserted into the cavity of the support member through the open end of the cavity after implantation of the support member into an intervertebral space, the growth member having a pre-manufactured shape that generally complements a shape of the cavity,
- wherein the support member includes oppositely positioned load bearing surfaces separated by a thickness, wherein the growth member includes oppositely positioned bone engagement surfaces separated by a thickness, and wherein the thickness of the growth member is greater than the thickness of the support member.
An implant comprising
- a partial cortical ring defining an inner pocket, the partial cortical ring having a thickness defined between first and second load bearing surfaces, the inner pocket being open adjacent the first and second load bearing surfaces, the partial cortical ring also defining a radial opening for providing access to the inner pocket, the radial opening being positioned opposite from a closed end of the inner pocket;
- a non-threaded cancellous insert block having a pre-manufactured shape that complements the shape of the inner pocket, the insert block being insertable into inner pocket through the radial opening, the insert block having a thickness defined between first and second bone engagement surfaces, the thickness of the insert block being greater than the thickness of the partial cortical ring.
Dependencies are inferred from the claim text.