Expandable intervertebral implant and associated instrumentation
First Claim
1. An expandable intervertebral implant, comprising:
- an implant body having a longitudinal axis and being transitionable between an initial configuration and an expanded configuration, said implant body including first and second axial walls spaced apart along a transverse axis and each having opposite end portions spaced apart along said longitudinal axis and a central portion located between said end portions, said implant body including first and second transverse end walls interconnecting said opposite end portions of said first axial wall with said opposite end portions of said second axial wall to substantially maintain said opposite end portions in a non-expanded state, said opposite end portions of said first axial walls positioned along a first plane, said opposite end portions of said second axial wall positioned along a second plane, a distance between said first and second planes defining a maximum non-expanded implant height of said implant body in said initial configuration at said opposite end portion of said axial walls, said central portion of at least one of said axial walls positioned inward of a corresponding one of said first and second planes to define a recessed region when said implant body is in said initial configuration, said recessed region comprising a concave curvature extending from said maximum non-expanded implant height at said opposite end portions of said axial walls and inwardly along said transverse axis to define a minimum non-expanded implant height of said implant body at said central portions of said axial walls in said initial configuration; and
an expansion member co-acting with and engaging said at least one of said axial walls to transition said implant body from said initial configuration to said expanded configuration, said at least one of said axial walls being flexibly deformed wherein said recessed region is outwardly expanded generally along said transverse axis to increase said implant height along said central portion while substantially maintaining said end portions in said non-expanded state to substantially maintain said implant height adjacent said end portions, said expansion member engaged with said central portion of each of said first and second axial walls in said expanded configuration with at least a portion of said recessed region extending outwardly beyond said plane when said implant body is in said expanded configuration.
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Accused Products
Abstract
An expandable intervertebral implant including an implant body transitionable between initial and expanded configurations, and having first and second axial walls spaced apart along a transverse axis with at least one of the walls defining a recessed region when the implant body is in the initial configuration. An expansion member co-acts with the axial wall to transition the implant body to the expanded configuration wherein the recessed region is outwardly expanded generally along the transverse axis. In another embodiment, the expansion member includes a first portion displaced along an axially extending slot formed in one of the walls, and a second portion displaced between the walls to transition the implant body to the expanded configuration. In a further embodiment, the first portion of the expansion member defines a passage extending therethrough having an inner transverse dimension sized larger than an outer transverse dimension of the second portion.
351 Citations
38 Claims
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1. An expandable intervertebral implant, comprising:
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an implant body having a longitudinal axis and being transitionable between an initial configuration and an expanded configuration, said implant body including first and second axial walls spaced apart along a transverse axis and each having opposite end portions spaced apart along said longitudinal axis and a central portion located between said end portions, said implant body including first and second transverse end walls interconnecting said opposite end portions of said first axial wall with said opposite end portions of said second axial wall to substantially maintain said opposite end portions in a non-expanded state, said opposite end portions of said first axial walls positioned along a first plane, said opposite end portions of said second axial wall positioned along a second plane, a distance between said first and second planes defining a maximum non-expanded implant height of said implant body in said initial configuration at said opposite end portion of said axial walls, said central portion of at least one of said axial walls positioned inward of a corresponding one of said first and second planes to define a recessed region when said implant body is in said initial configuration, said recessed region comprising a concave curvature extending from said maximum non-expanded implant height at said opposite end portions of said axial walls and inwardly along said transverse axis to define a minimum non-expanded implant height of said implant body at said central portions of said axial walls in said initial configuration; and an expansion member co-acting with and engaging said at least one of said axial walls to transition said implant body from said initial configuration to said expanded configuration, said at least one of said axial walls being flexibly deformed wherein said recessed region is outwardly expanded generally along said transverse axis to increase said implant height along said central portion while substantially maintaining said end portions in said non-expanded state to substantially maintain said implant height adjacent said end portions, said expansion member engaged with said central portion of each of said first and second axial walls in said expanded configuration with at least a portion of said recessed region extending outwardly beyond said plane when said implant body is in said expanded configuration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. An expandable intervertebral implant, comprising:
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an implant body having a longitudinal axis and being transitionable between an initial configuration and an expanded configuration, said implant body including first and second axial walls spaced apart along a transverse axis to define an implant height and having opposite end portions spaced apart along said longitudinal axis and a central portion located between said end portions, said implant body including first and second transverse end walls interconnecting said opposite end portions of said first axial wall with said opposite end portions of said second axial wall to substantially maintain said opposite end portions in a non-expanded state, said opposite end portions of said at least one of said axial walls positioned along a plane, said central portion of at least one of said axial walls positioned inward of said plane to define a recessed region when said implant body is in said initial configuration; and an expansion member co-acting with and engaging said at least one of said axial walls to transition said implant body from said initial configuration to said expanded configuration, said at least one of said axial walls being flexibly deformed wherein said recessed region is outwardly expanded generally along said transverse axis to increase said implant height along said central portion while substantially maintaining said end portions in said non-expanded state to substantially maintain said implant height adjacent said end portions, said expansion member engaged with said central portion of each of said first and second axial walls in said expanded configuration with at least a portion of said recessed region extending outwardly beyond said plane when said implant body is in said expanded configuration; and wherein said recessed region comprises a concave curvature extending inwardly along said transverse axis and curving in a longitudinal direction along said longitudinal axis and along substantially an entire length of said at least one of said axial walls between said pair of opposite end portions wherein said opposite end portions of the first and second axial walls are planar.
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26. An expandable intervertebral implant, comprising:
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an implant body having a longitudinal axis and being transitionable between an initial configuration and an expanded configuration, said implant body including first and second axial walls spaced apart along a transverse axis; and an expansion member including a body portion and at least one side portion, said at least one side portion at least partially positioned between said axial walls such that movement of said expansion member generally along said longitudinal axis displaces said side portion between said axial walls to transition said implant body from said initial configuration to said expanded configuration wherein at least one of said axial walls is outwardly expanded generally along said transverse axis, said body portion defining a passage extending therethrough having an inner transverse dimension sized larger than an outer transverse dimension of said at least one side portion; and wherein said first and second axial walls include opposing inner surfaces, said inner surfaces defining opposing ramped surfaces each defining an inward taper along said longitudinal axis, said at least one side portion of said expansion member being displaced between said inner surfaces and slidably engaged with each of said opposing ramped surfaces during said axial movement of said expansion member to transition said implant body toward said expanded configuration, said at least one side portion of said expansion member concurrently engaged with a central portion of each of said opposing inner surfaces when said implant body is in said expanded configuration to maintain said implant body in said expanded configuration. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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Specification