Method and apparatus for treating bone fractures, and/or for fortifying and/or augmenting bone, including the provision and use of composite implants, and novel composite structures which may be used for medical and non-medical applications
Inventors
D'Agostino, Jeffrey A. • Whitehouse, Robert S. • Watterson, Arthur • Lane, Joseph P. • McRury, Ian D. • Marchetti, Samantha • Seil, Nikole • Blank, Werner • Hegedus, Charles
Assignees
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Publication Number
US-11484627-B2
Publication Date
2022-11-01
Expiration Date
Abstract
A composite comprising: a barrier, said barrier being configured to selectively pass water, and said barrier being degradable in the presence of water; a matrix material for disposition within said barrier, wherein said matrix material has a flowable state and a set state, and wherein said matrix material is degradable in the presence of water; and at least one reinforcing element for disposition within said barrier and integration with said matrix material, wherein said at least one reinforcing element is degradable in the presence of water, and further wherein, upon the degradation of said at least one reinforcing element in the presence of water, provides an agent for modulating the degradation rate of said matrix material in the presence of water.
Core Innovation
The invention relates to a composite comprising a core structure with at least one reinforcement component and an outer region formed on the core structure. The at least one reinforcement component comprises a degradable matrix and a plurality of fibers arranged in bundles, with the plurality of fibers disposed within the degradable matrix, and the outer region comprises at least one layer and a degradable polymer.
The composite is configured as a screw, pin or anchor, with the at least one reinforcement component present in an amount at least 20 volume percent of the composite. The fibers are present in an amount of 10 to 75 volume percent of the composite, and adjacent bundles are arranged substantially parallel to one another, including an axial bundle extending parallel to a longitudinal axis and a bias bundle extending at an angle to the longitudinal axis.
Further constructions include a cannulated core structure, a plurality of reinforcement components separated by the degradable matrix, interlocking of a reinforcement component with a surrounding binding fiber or with interwoven fiber elements, a porous surface, and specified cross-sectional profiles including round, circular, 3-sided, 4-sided, 6-sided, 8-sided, cruciform, and multi-lobed.
Claims Coverage
The document provides three independent claims. Each independent claim defines a composite having a degradable-matrix reinforcement core with bundled fibers and a degradable-polymer outer region, with further limitations on screw, pin, or anchor configurations and on fiber-bundle arrangement, cannulation, porosity, and material features.
Degradable-matrix reinforcement core with bundled fibers and degradable polymer outer region as screw, pin, or anchor
A composite having a core structure comprising at least one reinforcement component with a degradable matrix and a plurality of fibers arranged in bundles, with the fibers disposed within the degradable matrix; and an outer region formed on the core structure comprising at least one layer and a degradable polymer; wherein the composite is a screw, pin or anchor; wherein the at least one reinforcement component is present in an amount at least 20 volume percent; and wherein the fibers are present in an amount of 10 to 75 volume percent.
Axial and bias bundled fiber arrangement in cannulated, degradable-matrix composite with layered degradable polymer
A composite having a core structure comprising at least one reinforcement component with a degradable matrix and a plurality of fibers arranged in bundles disposed within the degradable matrix; and an outer region comprising at least one layer and a degradable polymer; wherein the plurality of fibers includes adjacent bundles arranged substantially parallel to one another; wherein the core structure comprises a longitudinal axis and the bundles include an axial bundle extending parallel to the longitudinal axis and a bias bundle extending at an angle to the longitudinal axis; wherein the axial bundles include adjacent axial bundles bound by a bias bundle; wherein the at least one reinforcement component comprises a plurality of reinforcement components separated by the degradable matrix; wherein one reinforcement component is interlocked with a surrounding binding fiber or interwoven fiber elements; wherein the at least one reinforcement component comprises a sheet having fibers extending substantially parallel to one another; wherein the core structure is cannulated.
Porous degradable-polymer outer region with filler materials for screw, pin, or anchor
A composite having a core structure comprising at least one reinforcement component with a degradable matrix and a plurality of fibers arranged in bundles with the fibers disposed within the degradable matrix; and an outer region comprising at least one layer, the outer region comprising a degradable polymer and at least one biodegradable or bioabsorbable filler selected from silk, resorbable metals, resorbable metal alloys, resorbable ceramics, and phosphate, borate, and silicate soluble glasses; wherein the plurality of fibers includes adjacent bundles arranged substantially parallel to one another; wherein the core structure comprises a longitudinal axis and the bundles include an axial bundle extending parallel to the longitudinal axis; wherein the composite has a porous surface; and wherein the composite is a screw, pin, or anchor.
Across the independent claims, the coverage focuses on composites that combine a degradable-matrix reinforcement core with fiber bundles and a degradable-polymer outer layered region, with further limitations defining screw, pin, or anchor form, axial and parallel-bundle relationships including cannulation, and outer-region filler and porosity features.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
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