TOE JOINT REPLACEMENT MODELS
First Claim
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1. An implantable device for replacing all or a portion of a metatarsophalangeal joint, comprising:
- (i) a metatarsal component for surgical implantation into the distal end of a metatarsal bone, comprising;
a metatarsal articulation member comprising a substantially convex bearing surface;
a base member adapted to be fixed within the metatarsal bone; and
a locking member adapted to mechanically join the metatarsal articulation member to the base member;
(ii) a phalanx component for surgical implantation into the proximal end of a proximal phalanx bone, comprising;
a phalanx articulation member comprising a substantially concave bearing surface;
a base member adapted to be fixed within the phalanx bone; and
a locking member adapted to mechanically join the phalanx articulation member to the base member;
wherein the metatarsal component and the phalanx component are adapted to cooperatively engage when implanted such that the metatarsal articulation member and the phalanx articulation member may move with respect to each other and collectively serve as a prosthetic metatarsophalangeal joint.
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Abstract
In various embodiments, provided are implantable devices for replacing all or a portion of a metatarsophalangeal joint, comprising (i) a metatarsal component comprising a substantially convex bearing surface; or (ii) a phalanx component comprising a substantially concave bearing surface; or (iii) both. In various embodiments, also provided are methods of treating hallux valgus by replacing all or a portion of a metatarsophalangeal joint with one or more of the provided implantable devices.
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Citations
28 Claims
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1. An implantable device for replacing all or a portion of a metatarsophalangeal joint, comprising:
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(i) a metatarsal component for surgical implantation into the distal end of a metatarsal bone, comprising; a metatarsal articulation member comprising a substantially convex bearing surface; a base member adapted to be fixed within the metatarsal bone; and a locking member adapted to mechanically join the metatarsal articulation member to the base member; (ii) a phalanx component for surgical implantation into the proximal end of a proximal phalanx bone, comprising; a phalanx articulation member comprising a substantially concave bearing surface; a base member adapted to be fixed within the phalanx bone; and a locking member adapted to mechanically join the phalanx articulation member to the base member; wherein the metatarsal component and the phalanx component are adapted to cooperatively engage when implanted such that the metatarsal articulation member and the phalanx articulation member may move with respect to each other and collectively serve as a prosthetic metatarsophalangeal joint. - View Dependent Claims (2)
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3. An implantable device for replacing all or a portion of a metatarsophalangeal joint, comprising:
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(i) a metatarsal component for surgical implantation into the distal end of a metatarsal bone, comprising; a metatarsal articulation member comprising a substantially convex bearing surface and a stem adapted to receive a portion of a locking member; a base member adapted to be fixed within the metatarsal bone, the base member comprising a cavity adapted to receive at least a portion of the stem and a portion of the locking member; and a locking member adapted to be received by the stem and cavity; wherein when the stem is received in the cavity and the locking member is received by the stem and cavity, the metatarsal articulation member is mechanically joined to the base member; (ii) a phalanx component for surgical implantation into the proximal end of a proximal phalanx bone, comprising; a phalanx articulation member comprising a substantially concave bearing surface and a stem adapted to receive a portion of a locking member; a base member adapted to be fixed within the phalanx bone, the base member comprising a cavity adapted to receive at least a portion of the stem and a portion of the locking member; and a locking member adapted to be received by the stem and cavity; wherein when the stem is received in the cavity and the locking member is received by the stem and cavity, the phalanx articulation member is mechanically joined to the base member; wherein the metatarsal component and the phalanx component are adapted to cooperatively engage when implanted such that the metatarsal articulation member and the phalanx articulation member may move with respect to each other and collectively serve as a prosthetic metatarsophalangeal joint. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11)
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12. An implantable device for replacing all or a portion of a metatarsophalangeal joint, comprising:
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(i) a metatarsal component for surgical implantation into the distal end of a metatarsal bone, comprising; a metatarsal articulation member comprising a substantially convex bearing surface and a locking member; a base member adapted to be fixed within the metatarsal bone, the base member comprising a cavity adapted to receive the locking member; wherein when the locking member is received by the cavity, the metatarsal articulation member is mechanically joined to the base member; (ii) a phalanx component for surgical implantation into the proximal end of a proximal phalanx bone, comprising; a phalanx articulation member comprising a substantially concave bearing surface and a locking member; a base member adapted to be fixed within the phalanx bone, the base member comprising a cavity adapted to receive the locking member; wherein when the locking member is received by the cavity, the phalanx articulation member is mechanically joined to the base member; wherein the metatarsal component and the phalanx component are adapted to cooperatively engage when implanted such that the metatarsal articulation member and the phalanx articulation member may move with respect to each other and collectively serve as a prosthetic metatarsophalangeal joint. - View Dependent Claims (13, 14, 15, 16, 17)
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18. An implantable device for replacing all or a portion of a metatarsophalangeal joint, comprising:
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(i) a metatarsal component for surgical implantation into the distal end of a metatarsal bone, comprising; a metatarsal articulation member comprising a substantially convex bearing surface and a cavity adapted to receive at least a portion of a locking member; a base member adapted to be fixed within the metatarsal bone, comprising a head portion, a body portion, and a continuous cavity; and a locking member adapted to be at least partially received by the metatarsal articulation member cavity; wherein when the locking member is received within the metatarsal articulation member cavity, the metatarsal articulation member is mechanically joined to the base member; (ii) a phalanx component for surgical implantation into the proximal end of a proximal phalanx bone, comprising; a phalanx articulation member comprising a substantially convex bearing surface and a cavity adapted to receive at least a portion of a locking member; a base member adapted to be fixed within the phalanx bone, comprising a head portion, a body portion, and a continuous cavity; and a locking member adapted to be at least partially received by the phalanx articulation member cavity; wherein when the locking member is received within the phalanx articulation member cavity, the phalanx articulation member is mechanically joined to the base member; wherein the metatarsal component and the phalanx component are adapted to cooperatively engage when implanted such that the metatarsal articulation member and the phalanx articulation member may move with respect to each other and collectively serve as a prosthetic metatarsophalangeal joint. - View Dependent Claims (19, 20, 21, 22, 23)
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24. An implantable device for replacing all or a portion of a metatarsophalangeal joint, comprising:
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(i) a metatarsal component for surgical implantation into the distal end of a metatarsal bone, comprising; a metatarsal articulation member comprising a substantially convex bearing surface; and a locking member comprising a screw thread adapted to fix the metatarsal component in the metatarsal bone; (ii) a phalanx component for surgical implantation into the proximal end of a proximal phalanx bone, comprising; a phalanx articulation member comprising a substantially concave bearing surface; and a locking member comprising a screw thread adapted to fix the phalanx component in the phalanx bone; wherein the metatarsal component and the phalanx component are adapted to cooperatively engage when implanted such that the metatarsal articulation member and the phalanx articulation member may move with respect to each other and collectively serve as a prosthetic metatarsophalangeal joint. - View Dependent Claims (25)
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26. An implantable device for replacing all or a portion of a metatarsophalangeal joint, comprising:
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(i) a metatarsal component for surgical implantation into the distal end of a metatarsal bone, comprising; a metatarsal articulation member comprising a substantially convex parabolic bearing surface terminating at equidistantly positioned ends; (ii) a phalanx component for surgical implantation into the proximal end of a proximal phalanx bone, comprising; a phalanx articulation member comprising a substantially concave bearing surface; wherein the metatarsal component and the phalanx component are adapted to cooperatively engage when implanted such that the metatarsal articulation member and the phalanx articulation member may move with respect to each other and collectively serve as a prosthetic metatarsophalangeal joint. - View Dependent Claims (27)
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28. A method of treating hallux valgus, comprising surgically replacing a metatarsophalangeal joint with an implantable device selected from:
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(I) an implantable two-component device comprising; (i) a metatarsal component for surgical implantation into the distal end of a metatarsal bone, comprising; a metatarsal articulation member comprising a substantially convex bearing surface; a base member adapted to be fixed within the metatarsal bone; and a locking member adapted to mechanically join the metatarsal articulation member to the base member; and (ii) a phalanx component for surgical implantation into the proximal end of a proximal phalanx bone, comprising; a phalanx articulation member comprising a substantially concave bearing surface; a base member adapted to be fixed within the phalanx bone; and a locking member adapted to mechanically join the phalanx articulation member to the base member; wherein the metatarsal component and the phalanx component are adapted to cooperatively engage when implanted such that the metatarsal articulation member and the phalanx articulation member may move with respect to each other and collectively serve as a prosthetic metatarsophalangeal joint; (II) an implantable two-component device comprising; (i) a metatarsal component for surgical implantation into the distal end of a metatarsal bone, comprising; a metatarsal articulation member comprising a substantially convex bearing surface; and a locking member comprising a screw thread adapted to fix the metatarsal component in the metatarsal bone; (ii) a phalanx component for surgical implantation into the proximal end of a proximal phalanx bone, comprising; a phalanx articulation member comprising a substantially concave bearing surface; and a locking member comprising a screw thread adapted to fix the phalanx component in the phalanx bone; wherein the metatarsal component and the phalanx component are adapted to cooperatively engage when implanted such that the metatarsal articulation member and the phalanx articulation member may move with respect to each other and collectively serve as a prosthetic metatarsophalangeal joint; and (III) an implantable two-component device comprising; (i) a metatarsal component for surgical implantation into the distal end of a metatarsal bone, comprising; a metatarsal articulation member comprising a substantially convex parabolic bearing surface terminating at equidistantly positioned ends; (ii) a phalanx component for surgical implantation into the proximal end of a proximal phalanx bone, comprising; a phalanx articulation member comprising a substantially concave bearing surface; wherein the metatarsal component and the phalanx component are adapted to cooperatively engage when implanted such that the metatarsal articulation member and the phalanx articulation member may move with respect to each other and collectively serve as a prosthetic metatarsophalangeal joint.
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Specification