摘要:
A slide-type cervical plate includes an anti-backout device (2) preventing the vertical movements of the bone anchor screws (3) and which consists of first vertical-blocking elements (71) capable of deforming elastically in a first direction so that an anchor screw (3) can be introduced into the corresponding bore (4) and of second vertical-blocking elements (8) capable of deforming elastically in a second direction different than the first so that another anchor screw (3) can be fitted into another bore (4), the first and second blocking elements deforming elastically when a combined external load in a vertical direction and in rotation in the clockwise direction is applied to the anchor screws (3).
摘要:
The device (9) comprises vertebral elements (10, 20, 10′, 20′) adapted to be fixed to the same lateral side of the bodies of at least two adjacent vertebrae (1, 2), the elements being associated in pairs that are provided to be associated with the left and right sides of the vertebrae. In order to guide the vertebrae effectively and stably, in order, in use, to reproduce an articulating intervertebral joint, the two elements of each pair delimit respective surfaces (15, 25, 15′, 25′) for the relative guiding of those elements, which surfaces are adapted, when the elements are implanted on their corresponding vertebra, to extend generally along the same lateral side of the body of the vertebrae and to rest and slide one against the other in such a manner that the surfaces define a center of rotation (C) about which the two elements are able to turn one relative to the other.
摘要:
A total shoulder prosthesis includes a glenoidal component a substantially hemispherical convex articular surface and of which a center of curvature is adapted, when the prosthesis is implanted, to be located in the glenoid cavity or in the immediate vicinity thereof, and a humeral component defining a concave articular surface adapted to cooperate with the convex articular surface of the glenoidal component. The concave humeral articular surface is defined by a metallic part of the humeral component to thereby reduce a space requirement of the prosthesis.
摘要:
The prosthesis according to the invention comprises a first component, humeral or femoral, presenting a concave surface of articulation and a second, intermediate component presenting first and second convex surfaces of articulation intended to cooperate respectively with the concave surface of articulation of the first component and with a glenoidal or acetabular concave surface of articulation. The second component is hollow and defines a volume for receiving a head of a member belonging to the first component, this member being connected to a metaphyseal part of the first component by a stem, the head being connected to the second component by traversing an opening made in a ring of the second component mounted on a cup of which the outer surface forms the second convex surface of articulation of the second component. The first convex surface of articulation of the second component is formed on the outer surface of the ring, around the aforementioned opening.
摘要:
A prosthetic implant made of polyethylene is packaged in a sterile manner by being placed in a flexible, gas-impermeable sachet after which a vacuum is created in the sachet and it is hermetically closed. The sachet is subsequently placed in a gas-impermeable envelope and an inert gaseous atmosphere is established in the envelope and the envelope is closed hermetically. The assembly formed by the implant, the sachet and the envelope is then exposed to radiation.
摘要:
An osteosynthesis plate designed for osteosynthesis of displaced fracture of the upper end of the arm bone includes a T-shaped main body (2) whereof the longitudinal branch (3) and the transverse branch (4) are respectively perforated with holes (5, 6, 8) for passing through screws for anchoring and fixing the plate against the outer profile of a bone, and fixing lugs (9) which extend from each side of the transverse branch (4) of the main body (2), the lugs being less thick than the main body and perforated with holes (10) which co-operate with other anchoring screws for completely fixing bone fragments when urged in contact with the bone external profile.
摘要:
This surgical apparatus comprises, on the one hand, means for spatial marking-out of the patella and femur of a patient to be operated on, and, on the other hand, means for simultaneous and relative representation of this patella provided virtually with a patellar implant of the prosthesis, and of this femur provided virtually with a femoral implant of the prosthesis, in a transverse plane passing both through the patella and through the trochlea of the aforementioned femoral implant. Using this apparatus, the surgeon can easily and quickly check the congruent position of the patellar implant with respect to the prosthetic femoral trochlea in order to reduce the risks of subsequent dislocations of the patella fitted with the prosthesis.
摘要:
The prosthesis according to the invention comprises a first component, humeral or femoral, presenting a concave surface of articulation and a second, intermediate component presenting first and second convex surfaces of articulation intended to cooperate respectively with the concave surface of articulation of the first component and with a glenoidal or acetabular concave surface of articulation. The second component is hollow and defines a volume for receiving a part of a member belonging to the first component, this part being connected to a metaphyseal part of the first component by a stem traversing an opening made in a ring of the second component mounted on a cup of which the outer surface forms the second convex surface of articulation of the second component, The first convex surface of articulation of the second component is formed on the outer surface of the ring, around the aforementioned opening.
摘要:
An elbow prosthesis which includes a humeral component having a rod extending along a longitudinal axis and this component further includes a generally cylindrical body having a first articulating surface about which an ulnar component is pivotally mounted so as to pivot about a longitudinal axis of the body. A spacing between a plane extending through the longitudinal axis of the body and the longitudinal of the rod of the humeral component is selected to define a desirable spacing therebetween depending upon a patient's morphology.
摘要:
Total prosthesis of a knee including a femoral element fitted with two condyles, a first of the condyles being external, a second of the condyles being internal, and a tibial plateau fitted with custom-made recesses to hold the condyles, wherein at least one of the condyles is integral on one of its sides with a convex cam ensuring posterior stability of the prosthesis. The tibial plateau has at least one track placed in the immediate vicinity of the recess holding the condyle integral with the cam, the at least one track being circumscribed by at least one curved abutment and at least one horizontal recess between posterior and anterior extremities of the tibial plateau. Provision is made between the condyles of the femoral element and the recesses of the tibial plateau for a free space and a notch for passage of a posterior cruciate ligament of a knee.