1. A wrist articulation prosthesis, comprising three elements that is to say an element called the \u201cmain element\u201d, designed to be positioned on the large bone, and element called the \u201cradial element\u201d, designed to be positioned on the radius, and an intermediate sliding element, designed to be mounted on the radial element and for being interposed between this radial element and the main element to allow clearance of these elements; the main element comprises a part forming an articulation side, designed to abut against the large bone, and at least one bone support rod
The prosthesis characterized in that:
The articulation side that delimits the said part of the main element is convex and presents a rounded form, particularly hemispherical or in a portion of a hemisphere, and
The intermediate element forms a concave articulation side appropriate for cooperating with the convex articulation side that forms the main element, this concave articulation side presenting, in a sectional view in the sagittal plane, that is in the plane in which the flexion and extension movement of the wrist takes place, a rounded circle form very slightly larger than that of the said convex articulation side, and presenting, in sectional view in the frontal plane, that is in the plane in which the abduction and adduction of the hand takes place, a rounded circle form markedly larger than that of the said convex articulation side.
2. The prosthesis according to claim 1, characterized in that the said bone support rod of the main element is laterally offset with relation to the said part forming an articulation side, so that the rod extends, when the main element is positioned on the large bone, along the lateral side of this large bone that is the side of the latter not turned toward the radius or toward the metacarpal bones, this bone support rod presenting a length such that the rod may be inserted in a metacarpal bone in order to ensure the main element is held in place with relation to the large bone.
3. The prosthesis according to claim 2, characterized in that each bone support rod forms an angle on the order of fifteen degrees with the perpendicular to a plane containing the side of the said part forming an articulation side designed to come into contact with the large bone.
4. The prosthesis according to claim 2, characterized in that the main element comprises two bone support rods, wherein one is designed to be inserted in the second metacarpal bone and wherein the other is designed to be inserted in the third metacarpal bone.
5. The prosthesis according to claim 4, characterized in that the rod designed to be inserted in the second metacarpal bone presents a bent form which offsets the rod with relation to the said part forming an articulation side, while the rod designed to be inserted in the third metacarpal bone is rectilinear.
6. The prosthesis according to claim 1, characterized in that the said part of the main element forming an articulation side is hollow at its area designed to come into contact with the large bone, and in that the part delimits a cavity allowing the engagement of this part on the large bone.
7. A prosthesis according to claim 1, characterized in that the radial element comprises an extremity in the form of a platform abutting against the resected extremity of the radius, this extremity in the form of a platform delimiting a shoulder abutting against the extremity of the radius and a side for mounting the intermediate element.
8. The prosthesis according to claim 1, characterized in that the mounting means that comprise the radial element and the intermediate element for mounting the intermediate element on the radial element comprise a rib in the form of a dovetail and a groove in the form of a dovetail appropriate for being closely engaged on the said rib, the radial element or the intermediate element comprising at least one rib or one projecting boss while, respectively, the intermediate element or the radial element comprises at least one corresponding groove or one cavity appropriate for receiving this rib or this boss with a locking mechanism.
9. The prosthesis according to claim 1, characterized in that the radial element and the intermediate element, as well as the mounting means that comprise this radial element and this intermediate element for mounting the intermediate element on the radial element, have a symmetrical form with relation to their median frontal plane.
10. A set of elements allowing the prosthesis to be built according to claim 1, characterized in that the set comprises a plurality of main elements of different sizes, adapted to the different sizes that may be presented depending on the articulation bones of the patients to be treated.
11. The set of elements according to claim 10, characterized in that the set comprises a plurality of intermediate elements with different thicknesses, allowing the positioning of the large bone with relation to the radial element to be adjusted in order to obtain an adequate ligament tension.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A segmented illumination system for use with an electronic stereoscopic display system having a sequentially scanning display, the segmented illumination system comprising:
a plurality of directional illumination segments corresponding to a plurality of display segments of the sequentially scanning display, the plurality of directional illumination segments arranged contiguously in a direction of the sequential scan;
a plurality of illumination units corresponding to each of the plurality of directional illumination segments for providing illumination to said corresponding illumination segments, the plurality of illumination segments thereby directionally illuminating the corresponding plurality of display segments in a first or second direction, wherein the plurality of illumination segments are physically isolated from one another;
wherein one or more first illumination units of each of said plurality of illumination units provide said illumination to corresponding one or more first directional illumination segments such that said corresponding one or more first directional illumination segments provide illumination in a first direction in synchronization with first-eye imagery provided by the corresponding plurality of display segments, and one or more second illumination units of each of the plurality of illumination units provide illumination to corresponding one or more second directional illumination segments such that said corresponding one or more second directional illumination segments provide illumination in a second direction in synchronization with second-eye imagery provided by the corresponding plurality of display segments.
2. A segmented illumination system in accordance with claim 1, wherein the first-eye and second-eye imagery is left eye and right eye imagery, and wherein the plurality of illumination segments provide left eye and right eye directional illumination to the corresponding display segments in synchronization with selected left eye and right eye imagery.
3. A segmented illumination system in accordance with claim 2, wherein the illumination system provides left eye directional illumination to one or more of a plurality of viewer left eyes and right eye directional illumination to one or more of a plurality of viewer right eyes in synchronization with selected left eye and right eye imagery.
4. A segmented illumination system in accordance with claim 1, wherein two or more of the plurality of illumination units corresponds to each of the plurality of illumination segments.
5. A segmented illumination system in accordance with claim 4, wherein said two or more illumination units provide illumination to the corresponding illumination segment at the same end of the illumination segment.
6. A segmented illumination system in accordance with claim 4, wherein at least one of the two or more illumination units provides illumination to the corresponding illumination segment at a first end of the illumination segment, and at least another one of the two or more illumination units provides illumination to the corresponding illumination segment at a second, opposing end of the corresponding illumination segment.
7. A segmented illumination system in accordance with claim 1, wherein one or more of the plurality of illumination units corresponds to each of the plurality of illumination segments, and the one or more illumination units provide illumination to each corresponding illumination segment at a first end of the illumination segments, and wherein each illumination segment comprises a corresponding curved second end, opposite each first end.
8. A segmented illumination system in accordance with claim 1, wherein said illumination units are LEDs.
9. A segmented illumination system in accordance with claim 1, wherein said display segments are liquid crystal display segments.
10. An electronic stereoscopic display system having a sequentially scanning display, the display system comprising:
a plurality of liquid crystal display segments for providing left eye and right eye imagery in a sequential scan;
a plurality of directional illumination segments corresponding to the plurality of liquid crystal display segments, the plurality of directional illumination segments arranged contiguously in the direction of the sequential scan;
a plurality of illumination units, one or more of the illumination units corresponding to each of the plurality of directional illumination segments for providing illumination to said corresponding directional illumination segments, the plurality of directional illumination segments thereby directionally illuminating the corresponding plurality of liquid crystal display segments in a first or second direction, wherein the plurality of illumination segments are physically isolated from one another;
wherein said plurality of illumination units provide said illumination to said corresponding directional illumination segments such that the corresponding directional illumination segments illuminate corresponding display segments in synchronization with selected left eye and right eye imagery provided by the corresponding plurality of liquid crystal display segments.
11. A display system in accordance with claim 10, wherein the illumination system provides left eye directional illumination to one or more of a plurality of viewer left eyes and right eye directional illumination to one or more of a plurality of viewer right eyes in synchronization with selected left eye and right eye imagery.
12. A display system in accordance with claim 10, wherein two or more of the plurality of illumination units corresponds to each of the plurality of illumination segments.
13. A display system in accordance with claim 12, wherein said two or more illumination units provide illumination to the corresponding illumination segment at the same end of the illumination segment.
14. A display system in accordance with claim 12, wherein at least one of the two or more illumination units provides illumination to the corresponding illumination segment at a first end of the illumination segment, and at least another one of the two or more illumination units provides illumination to the corresponding illumination segment at a second, opposing end of the corresponding illumination segment.
15. A display system in accordance with claim 10, wherein one or more of the plurality of illumination units corresponds to each of the plurality of illumination segments, and the one or more illumination units provide illumination to each corresponding illumination segment at a first end of the illumination segments, and wherein each illumination segment comprises a corresponding curved second end, opposite each first end.