Abstract: A glenoid component for a shoulder prosthesis adapted to be mounted in a glenoid cavity of a shoulder. An elongated keel adapted to engage with the glenoid cavity is attached to the internal surface of the base. The keel extends along a longitudinal axis of the base. The keel includes various configurations of transverse members extending away from the longitudinal axis. The surgeon selects a glenoid component with a keel and transverse member configuration that is anatomically optimized for the patient. Glenoid components properly optimized provide mechanical strength and stability superior to prior art devices. The glenoid components disclosed herein are particularly well suited for use in an anatomical total shoulder prosthesis, but may are also suited to partial shoulder prostheses and reverse shoulder prostheses.

Abstract: A low-profile offset stem tibial implant includes a tray with a plate that extends transversely around a first tibial axis. The plate includes a distal surface adapted to engage against the prepared surface of the tibia. An engagement portion extends away from the distal surface of the plate substantially along the first tibial axis. A stem is provided with a distal end adapted to be introduced into the medullary canal of the tibia along a second tibial axis and a proximal end. One or more adapter elements are provided with a proximal portion sized to engage with the engagement portion of the plate along the first tibial axis. The adapter element also includes a distal portion adapted to engage with the proximal end of the stem along the second tibial axis. The adapter element permits adjustment of the medio-lateral and antero-posterior position of the second tibial axis relative to the first tibial axis.

Abstract: A surgical instrument including at least one tibial phantom generally corresponding to at least certain features of the tibial implant. The tibial phantom includes a top surface adapted to move freely against the prepared bottom end of the tibia. At least one talus phantom generally corresponding to at least certain features of the talus implant is engaged with the prepared top surface of the talus. At least one phantom skid is located between the tibial phantom and the talus phantom. The phantom skid is engaged with the tibial phantom such that dynamic engagement between the phantom skid and the talus phantom through at least extension and flexion of the ankle joint positions the tibial phantom on the prepared bottom end of the tibia. The phantom skid can either be a part of the tibial phantom or a separate component.

Abstract: A method of implanting in a fibula a malleolar implant including a head and a shank. The method comprises the steps of creating a bore in the fibula extending from an inner face to an outer face and applying a traction force to the malleolar implant so that the shank is pulled into the bore.

Abstract: The distal end part of the retractor according to the invention is provided both with terminal tips for abutment on one of the femoral condylar walls which define therebetween the intercondylar space, and with a wing extending laterally in projection from this end part in order to form a frontal surface for thrust, in a medial-lateral direction, of that part of the quadriceps muscle tendon containing the patella when the tips are in abutment in the intercondylar space. By using this retractor as a lever, the wing efficiently reclines the patella, without turning it completely on itself, entirely exposing one of the femoral condyles. This invention is more particularly applicable to a surgical procedure for implanting a unicompartmental knee prosthesis.

Abstract: A set of humeral components for a total shoulder prosthesis, wherein each component is formed by an anchoring stem and a metaphyseal part which defines a concave surface of articulation in the form of a portion of a sphere. The offset between an axis of symmetry of this surface and a central axis of the metaphyseal part varies between the different components of the set. This makes it possible to limit or to avoid, by a reasoned choice of the humeral component used, an interference with the pillar of the scapula during a movement of adduction.

Abstract: This surgical apparatus comprises, on the one hand, means for spatial marking-out of the kneecap and femur of a patient to be operated on, and, on the other hand, means for simultaneous and relative representation of this kneecap provided virtually with a patellar implant of the prosthesis, and of this femur provided virtually with a femoral implant of the prosthesis, in a sagittal plane passing both through the kneecap and through the trochlea of the aforementioned femoral implant. Using this apparatus, the surgeon can easily and quickly check the antero-posterior size of the prosthesis in order to reduce the risks of subsequent dislocations of the kneecap fitted with the prosthesis.

Abstract: The prosthesis of this invention comprises a humeral or femoral component presenting a concave articulation surface, and an intermediate component presenting first and second convex articulation surfaces intended to cooperate respectively with said concave articulation surface of the humeral or femoral component and with a concave glenoid or cotyloid articulation surface. The locus of the instantaneous centers of rotation of the first convex articulation surface, with respect to the concave humeral or femoral articulation surface, and the locus of the instantaneous centers of rotation of the second convex articulation surface on the glenoid or cotyloid surface, are located on either side of the first surface.

Abstract: 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.

Abstract: A prosthetic element comprising two principal components which are assembled together and immobilized with respect to each other by a screw which may be selectively threaded into at least one tapping in at least one of the principal components. The screw comprises at least one radial element adapted to abut against a stop surface within the first component, and a non-threaded end forming a guide which is adapted to slide in a bore in the second component.

Abstract: A humeral component, forming a first articulating surface, and an ulnar component forming a second articulating surface adapted to be disposed around a part of the first articulating surface and to pivot about its longitudinal axis. This ulnar component is provided with structure for mounting a locking element which forms a third articulating surface extending the second and adapted likewise to be disposed around a part of the first surface. These mounting structure comprise guiding structures adapted to cooperate with complementary structure provided on the locking element in order to guide this element in translation with respect to the ulnar component, up to a position where blocking structure provided respectively on the locking element and on the ulnar component may be employed to immobilize this element on this component, these blocking structure being able to be employed only in this position.

Abstract: A method of positioning a malleolar implant for partial or total ankle prosthesis wherein the implant includes a head intended to bear against the astragalus or astragalian prosthetic component and a shank provided to be introduced in a bore in the fibula including providing an orifice in the shank and inserting the implant in the bore by use of force applied along a flexible traction member extending through the orifice.

Abstract: 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.

Abstract: A shoulder prosthesis glenoid component which includes a base adapted to be immobilized on a glenoid cavity of a shoulder, and an element including a convex articulation surface adapted to cooperate with a humeral component of the prosthesis. The element is selectively mounted on the base in a plurality of positions corresponding to different positions of the convex articulation surface with respect to the glenoid cavity.

Abstract: A prosthesis of the upper extremity of the humerus of the type that comprises a stem anchored in the humeral canal and provided on its upper or metaphyseal part with a bearing surface against which rests a hemispherical cap suitable to interact with a shoulder socket, wherein the stem is selected from a set of stems each provided with a bearing surface having a tilt angle that differs with respect to a longitudinal axis of each stem. A set of humeral stems comprises several stems each of which is provided with a bearing surface having a tilt angle that differs with respect to the longitudinal axis of each stem.

Abstract: This invention relates to a prosthetic element comprising two principal components intended to be assembled together and immobilized with respect to each other by means of a screw, which may be screwed by means of at least one thread in two tappings which are respectively fast or intended to be rendered fast with one and the other principal components. The screw comprises at least one radial element in relief adapted to come into abutment against a stop surface fast with a first component, and a non-threaded end forming guide finger and adapted to slide in a housing, of cross-section correspondiong to that of this finger and made in the second component.

Abstract: A device for setting and removing a deformable implant from bone wherein the device includes a body on which is mounted a movable handle which is operatively connected to activating elements for displacing a rod relative to the body for deforming and/or removing an implant from the bone. The device further includes a rod locking and disengaging assembly which is movable from a first position to prevent movement of the rod to a second position to permit movement of the rod relative to the body.

Abstract: 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.

Abstract: This patellar implant for total or partial prosthesis of the knee joint incorporates an outer articular surface and an inner articular surface provided to cooperate respectively with an outer side and an inner side of a femoral trochlea or of a femoral prosthetic component and joined together by a transition ridge. The ridge is curved as viewed from the front of said implant, with a concavity facing the outer articular surface, while the outer articular surface is concave in a plane parallel to the sagittal plane and in a transverse plane.

Abstract: A device for fixing an implant in a patient's bone which includes an expanding element which is limited in it's plastic deformation when a force is applied for fixing the implant in the bone, such that the expanding element is reversible when another force is applied for removing the implant from the bone.