Loading patent…
AssigneeNone recorded
InventorRay C. Wasielewski
Estimating the term…
A prosthetic constraining device for use with a hip replacement prosthesis that includes an acetabular cup assembly adapted to be bonded to a patient's pelvis and a femoral stem adapted to be bonded to the patient's femur, where the femoral stem includes a ball component at its proximal end received within the acetabular cup assembly to form a ball joint type coupling, and where the constraining device includes a ring having a central aperture, where the ring is adapted to be mounted to a rim of the acetabular cup assembly so that the femoral stem passes through the central aperture, where the diameter of the central aperture is less than the diameter of the ball component on the proximal end of the femoral stem so that the ring assists in maintaining the ball joint type coupling between the acetabular cup assembly and the femoral stem, and where the ring comprises a biologic material, a biologically reabsorbable material and a combination of biologic, or biologically reabsorbable materials.
A prosthetic constraining device for use with a hip replacement prosthesis that includes an acetabular cup assembly adapted to be bonded to a patient's pelvis and a femoral stem adapted to be bonded to the patient's femur, where the femoral stem includes a ball component at its proximal end received within the acetabular cup assembly to form a ball joint type coupling, the constraining device comprising:
A prosthetic hip prosthesis comprising:
A prosthetic constraining device for implantation in proximity to a hip joint, comprising an arcuate body defining a central aperture for allowing a femoral component to extend therethrough, the arcuate body including a distal surface having at least one depression extending radially thereacross to provide an increased range of angular motion of the femoral component, and including a proximal surface adapted to be mounted to at least one of an acetabular prosthesis, an acetabular bone, and an innominate bone to prevent a femoral head of the femoral component from completely passing distally through the aperture.
A constraining device for, at least temporarily, maintaining engagement of a prosthetic femoral stem component with a prosthetic acetabular component of a prosthetic hip assembly, the constraining device comprises a material taken from the group consisting of a biologic material, a biologically reabsorbable material, and a combination of biologic and biologically reabsorbable materials.
An implantable constraining device for, at least temporarily, maintaining integrity of a hip joint, the constraining device comprises a material taken from the group consisting of a biologic material, a biologically reabsorbable material, and a combination of biologic and biologically reabsorbable materials.
A constraining device for implantation in proximity to a hip joint, including a plate comprising at least one biologically reabsorbable material, having an aperture extending therethrough for allowing a femoral component to extend therethrough, the plate including a distal surface having at least one depression accommodating an increased range of angular motion of the femoral component, and a proximal surface adapted to be mounted to at least one of an acetabular prosthesis, an acetabular bone, and an innominate bone to inhibit a femoral head of the femoral component from completely passing distally through the aperture.
A method for providing at least temporary stability to a prosthetic hip joint which includes an acetabular cup assembly bonded to a patient's pelvis and a femoral stem bonded to the patient's femur, where the femoral stem includes a ball component at its proximal end received within the acetabular cup assembly to form a ball joint type coupling, the method comprising the step of:
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
From the US filing history. Foreign family members aren’t listed.
Backward citations are indexed for grants only.
Containing added animal cells: characterised by specific cells or progenitors thereof, e.g. fibroblasts, connective tissue cells, kidney cells
Joints: accessories
Accessories: bellows or hose-like seals; Sealing membranes
Joints: for the hip
Term end not estimated
1. Field of the Invention
The present invention is directed toward constraining components for use with joints of the body. Examples of such joints include hip joints, shoulder joints, elbow joints, and ankle joints. More specifically, aspects of the present invention are directed toward biologic and biologically reabsorbable acetabular constraining components to at least temporarily augment the stability and function of the joint after repair or replacement surgery.
2. Background of the Invention
FIG. 1 is a perspective view of a prior art femoral prosthesis fitted within a prior art acetabulum prosthesis.
FIG. 2 is a side representative view of a prior art acetabulum prosthesis implanted within the pelvis;
FIG. 3 is a cross-sectional, side elevational view taken along lines 3-3 of FIG. 4;
The exemplary embodiments described herein relate to constraining devices, materials and techniques for use in hip replacement surgery. It will, of course, be apparent to those of ordinary skill in the art that the devices, materials and techniques disclosed herein may be useful for other types of implants and orthopedic surgeries.
As shown in FIGS. 3-5, a first exemplary embodiment of the present invention is a constraining ring 24 adapted to be mounted on a distal end of the acetabular shell 10 (see FIG. 5) for maintaining the ball 22 of the femoral component 14 within the acetabular shell 10. The constraining ring 24 is comprises a biologic and/or a biologically reabsorbable material that provides temporary stability to the hip joint for varying times until live tissue (such as scar tissue) forms and replaces the biologic and/or biologically reabsorbable material or stability is achieved through normal host compensatory mechanisms.
In an exemplary procedure, a physician would position the constraining ring 24 around the neck of the femoral component 14 and thereafter attach the ball 22 to the end of the neck of the femoral component 14. This effectively maintains the position of the constraining ring 24 between the ball 22 and the base of the neck, as the cross section of the opening of the constraining ring 24 does not accommodate throughput of the ball 22 or the base of the neck of the femoral component 14. After the physician has seated the ball 22 in the acetabular insert 20, the constraining ring 24 is mounted onto the distal rim of the acetabular shell 10 with reabsorbable fasteners, such as, without limitation, clips, snaps, screws, sutures, and rivets 26. It is likewise possible that the constraining ring 24 be mounted to the acetabular bone or the innominate bone, or to the acetabular insert 20. The constraining ring 24 acts to inhibit post-operative dislocation of the ball 22 from the acetabular shell 10.