Constrained spacer device for the knee joint
AssigneeTecres S.P.A.
InventorsGiovanni Faccioli, Renzo Soffiatti
Life of this patent
Estimating the term…
Abstract
A spacer device for the knee joint including a femoral component, a tibial component and an intermediate component, wherein the femoral component is adapted to be constrained to an end of the femoral bone in proximity to the knee joint, wherein the tibial component is adapted to be constrained to an end of the tibial bone in proximity to the knee joint, the femoral component being adapted to come into contact and to articulate with the tibial component, wherein the intermediate component is placed in use between the femoral component and the tibial component and wherein the constrained spacer device includes a first hinge and a second hinge adapted to rotatably constrain the femoral component to the tibial component.
Claims18
A temporary spacer device for the knee joint comprising a femoral component, a tibial component and an intermediate component, wherein said spacer device contains and/or is adapted for being added with one or more medical substances including antibiotics, wherein said femoral component is suitable for being constrained to an end of the femoral bone in proximity to the knee joint, wherein said tibial component is suitable for being constrained to an end of the tibial bone in proximity to the knee joint, wherein said intermediate component has a proximal end placed at said femoral component and a distal end placed at said tibial component, wherein said proximal end has a through hole and wherein said distal end has a through hole, said femoral component comprising a first condylar portion and a second condylar portion, said first condylar portion being placed laterally and said second condylar portion being placed medially with respect to the sagittal plane of the human body, said femoral component being suitable to come into contact and to articulate with said tibial component (3), wherein said intermediate component is placed in use between said femoral component and said tibial component, wherein said tibial component comprises a tibial plateau, said tibial plateau comprising two condylar articular bases, corresponding to said condylar portions, and an intercondylar protuberance placed between said condylar articular bases and suitable, in use, for being inserted into an intercondylar space of said femoral component, wherein said spacer device comprises a first hinge and a second hinge adapted to rotatably constrain said femoral component to said tibial component, wherein said intercondylar protuberance has an opening or recess extending substantially parallel with respect to the longitudinal axis of the human body, said opening or recess extending inside said tibial component for a certain length (T) and wherein said distal end of said intermediate component, in use, inserts into said opening or recess, so as to have a certain play between said distal end and said opening or recess so as to allow said distal end to move at least in the sagittal direction in said opening or recess.
A method for assembling a temporary spacer device for the knee joint comprising a femoral component, a tibial component and an intermediate component, wherein said spacer device contains and/or is adapted for being added with one or more medical substances including antibiotics, wherein said femoral component is suitable for being constrained to an end of the femoral bone in proximity to the knee joint, wherein said tibial component is suitable for being constrained to an end of the tibial bone in proximity to the knee joint, wherein said intermediate component has a proximal end placed at said femoral component and a distal end placed at said tibial component, wherein said proximal end has a through hole and wherein said distal end has a through hole, said femoral component comprising a first condylar portion and a second condylar portion, said first condylar portion being placed laterally and said second condylar portion being placed medially with respect to the sagittal plane of the human body, said femoral component being suitable for coming into contact and articulating with said tibial component, wherein said tibial component comprises a tibial plateau, said tibial plateau comprising two condylar articular bases, corresponding to said condylar portions, and an intercondylar protuberance placed between said condylar articular bases and suitable, in use, for being inserted into an intercondylar space of said femoral component, wherein said intercondylar protuberance has an opening or recess extending substantially parallel with respect to the longitudinal axis of the human body, said opening or recess extending inside said tibial component for a certain length (T) comprising the steps of:
- associating in a constrained manner said intermediate component with said femoral component through said first hinge,
- inserting said intermediate component into said tibial component, wherein said step of inserting said intermediate component into said tibial component comprises inserting said distal end of said intermediate component into said opening or recess of said tibial component, so as to allow said distal end to move at least in the sagittal direction in said opening or recess,
- constraining said intermediate component to said tibial component through said second hinge, said first hinge and said second hinge being suitable for rotatably constraining said femoral component to said tibial component.
Dependencies are inferred from the claim text.