Retention devices, lattices and related systems and methods
Inventors
Luzzi, Robert • MAGEE, Francis Patrick
Assignees
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Publication Number
US-11395681-B2
Publication Date
2022-07-26
Expiration Date
Abstract
A woven retention device that is configured to receive a fastener in a bone hole can be configured to promote bone ingrowth and impede biofilm formation. The woven retention device can be made of woven filaments that outline apertures of varying sizes and shapes and can serve as an interface between the fastener and the bone material. In a first relaxed state, the interwoven filaments can outline apertures of varying sizes and shapes within a predetermined range and in a second constricted state inside the bone hole with the fastener the interwoven filaments can outline apertures of decreased area that still fall within the predetermined range. The woven retention device can be configured to allow for optimal bone growth while at the same time minimizing the likelihood that biofilm forms thereon.
Core Innovation
The invention relates to a retention device to promote bone ingrowth and impede biofilm formation, having a sleeve body comprising a plurality of filaments with an exterior surface configured to contact a bone surface and an interior surface configured to contact a fastener. The device includes a proximal end configured to receive the fastener and a distal end opposite the proximal end. The sleeve body is configured to have a relaxed state and a constricted state, with the plurality of filaments outlining pores in the relaxed state.
In the relaxed state, each pore has a pore size along a plane of the plurality of filaments, within a specified pore-size range. In the constricted state, the pore size changes as a function of a diameter of the retention device while the pore size remains within the specified range. The diameter of the retention device in the relaxed state is different than the diameter in the constricted state, so the device transitions between relaxed and constricted states while maintaining pore-size constraints.
A related aspect is a retention device to promote bone growth in pores defined by a substantially tubular lattice formed by the filaments. The retention device includes a relaxed state and a constricted state, with a predetermined pore size that falls within a predetermined range and remains substantially within the predetermined range when the retention device is in both states. The plurality of filaments includes at least one filament having a diameter between 0.2 mm and 0.4 mm.
Claims Coverage
The independent claim set contains three independent claims. Across these independent claims, the coverage centers on a filament-based sleeve or tubular lattice retention device contacting bone and a fastener, relaxed and constricted states with pore-size constraints, and filament diameter constraints within a specified range.
Filament sleeve retention device with relaxed and constricted states
A retention device including a sleeve body with an exterior surface configured to contact a bone surface and an interior surface configured to contact a fastener, with a proximal end configured to receive the fastener and a distal end opposite the proximal end. The retention device is configured to have a relaxed state and a constricted state, where in the relaxed state the plurality of filaments outline pores having pore size along a plane of the plurality of filaments within a range of 400-800 μm. In the constricted state, the pore size changes as a function of a diameter of the retention device while the pore size remains within the range of 400-800 μm, and the pores are configured to promote bone ingrowth and impede biofilm formation.
Pore size within range while device diameter changes
A retention device configured to have a relaxed state and a constricted state, with in the relaxed state pores defined by the plurality of filaments having pore size along a plane of the plurality of filaments within a range of 400-800 μm. In the constricted state, the pore size changes as a function of a diameter of the retention device while the pore size remains within the range of 400-800 μm, where the diameter of the retention device in the relaxed state is different than the diameter in the constricted state.
Substantially tubular lattice promoting bone growth with maintained predetermined pore size
A retention device to promote bone growth comprising a sleeve body comprising a plurality of filaments that form a substantially tubular lattice having pores defined by adjacent filaments. The lattice has an exterior surface configured to contact a bone surface and an interior surface configured to contact a fastener. The retention device moves between a relaxed state and a constricted state while a predetermined pore size falls within a predetermined range and remains substantially within the predetermined range when in both states, where the diameter in the relaxed state is different than the diameter in the constricted state. The predetermined pore size is within a range of 200 μm and 600 μm and promotes bone growth.
Collectively, the independent claims require a filament-based retention device contacting both bone and a fastener, having relaxed and constricted states that change device diameter and affect pore size while maintaining pore-size constraints, and including filaments having diameters between 0.2 mm and 0.4 mm.
Stated Advantages
Promote bone ingrowth.
Impeded biofilm formation.
Promote bone growth in the pores.
Documented Applications
No documented applications found
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