Photodynamic articular joint implants and methods of use
Inventors
Rabiner, Robert A. • Rader, Richard Scott • Gausepohl, Thomas
Assignees
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Publication Number
US-11141207-B2
Publication Date
2021-10-12
Expiration Date
Abstract
Photodynamic devices for replacement of an articular head of a bone are provided. In an embodiment, a photodynamic device includes a photodynamic support member and an articular member attachable, either fixedly or removably, to the photodynamic support member and having a bearing surface. In an embodiment, the articular member includes a recess designed to receive the photodynamic support member. In an embodiment, the photodynamic support member includes an opening into which a shaft of the articular member can be inserted to attach the articular member to the photodynamic support member.
Core Innovation
The disclosed invention relates to photodynamic articular joint implant concepts using a photodynamic support member and an articular member with a bearing surface. A photodynamic support member is formed by curing a light-sensitive liquid inside an expandable member, and the cured photodynamic implant is configured to be positioned in a space within bone and to attach and stabilize an articular member through a bearing surface interface.
The invention further provides a joint repair device that includes a first bone repair device and a second bone repair device, each having a photodynamic support member attached or engaging a corresponding articular member. The bearing surfaces are complementary to and engaged with each other, and may support articulation between bearing surfaces. Each photodynamic support member is inflatable and deflatable to adjust a position, an angulation, an alignment, or combinations thereof of the associated articular member.
The disclosed system describes components and light-driven curing, including a light source, a light pipe, a delivery catheter with an inner void and an inner lumen, an expandable member, and a light-conducting fiber. The photodynamic implant formed by photodynamic curing hardens a curable material into a rigid structure that anchors the articular member within an intramedullary cavity with stabilization, including longitudinal and rotational stabilization and adjustment of angle and length. Complementary bearing surfaces are described with embodiments including an acetabular cup and/or a liner, and kit and unit dose elements are described for forming and implanting the photodynamic support member and attaching the articular member.
Claims Coverage
The independent claims cover joint repair devices with first and second bone repair devices in which photodynamic support members engage complementary bearing surfaces on respective articular members. Across the independent claims, the main inventive features include complementary bearing surface engagement, photodynamic inflatable and deflatable support members for position, angulation, and alignment adjustment, and placement in a bone space with relative alignment and anchoring.
Complementary bearing-surface joint repair with paired photodynamic support members
A joint repair device comprising a first bone repair device having a first photodynamic support member attached to a first articular member with a first bearing surface, and a second bone repair device having a second photodynamic support member attached to a second articular member with a second bearing surface complementary to and engaged with the first bearing surface.
Inflatable and deflatable photodynamic support members for position, angulation, and alignment adjustment
The first photodynamic support member is inflatable and deflatable to adjust a position, an angulation, an alignment or some combination thereof of the first articular member, and the second photodynamic support member is inflatable and deflatable to adjust a position, an angulation, an alignment or some combination thereof of the second articular member.
Bone-space placement with relative alignment between support and articular members
The first photodynamic support member and the second photodynamic support member are designed to be placed into a space within a bone, where the alignment of the first articular member is relative to the first photodynamic support member and the alignment of the second articular member is relative to the second photodynamic support member.
Angle adjustment relative to a longitudinal axis of the bone
The first photodynamic support member is inflatable and deflatable to adjust an angle of the first articular member relative to a longitudinal axis of the bone, and the second photodynamic support member is inflatable and deflatable to adjust an angle of the second articular member relative to the longitudinal axis of the bone.
Across the independent claims, the device is defined by paired photodynamic support members that engage complementary bearing surfaces on first and second articular members, with the support members being inflatable and deflatable to adjust the articular members’ position, angulation, and alignment. The claims also specify placement within a bone space and angle adjustment relative to a longitudinal axis of the bone.
Stated Advantages
Allows adjustment of position, angulation, alignment, or combinations thereof of articular members using inflatable and deflatable photodynamic support members.
Provides complementary bearing surface engagement between first and second articular members to support joint repair.
Supports configuring alignment of articular members relative to photodynamic support members and adjusting articular member angle relative to a longitudinal axis of the bone.
Documented Applications
A photodynamic joint repair device in which first and second bone repair devices are placed into a space within bone to anchor and attach articular members, including configurations with complementary bearing surfaces such as an acetabular cup and/or a liner.
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