摘要:
The drilling device for forming an osseous channel (2) with a curved profile (2b) via a straight cannula (6) previously fixed in the body of a vertebra (3) with a cortical plateau (4) of a spinal segment (Sr) of a vertebral column (Cv) includes a guide pin (8) which is provided from a guide pin kit and has at one of its ends a curved profile (8a) of which the radius of curvature R is less than 20 millimeters, and a sharpened tip (8b) arranged in a direction defined by an angle Y which is less than 90 degrees to the longitudinal axis of said pin, the profile of said guide pin (8) making it possible to define, after insertion thereof into the body of the vertebra (3), two contact points a and b ensuring the guidance of the free end of an articulated drill bit (10) so as to position said free end in a direction substantially perpendicular to that of the cortical plateau (4) of the vertebra (3) to be drilled.
摘要:
There is provided a posterior lumbar joint prosthesis which includes prosthetic elements reproducing the movements of the joint facets and vertebral anchors which adapt to the variations in the anatomy of vertebra. In use, the prosthesis has lower and upper connectors on each side of the lumbar vertebra. The lower connectors are coupled with, and pivotably mounted onto, respective lower pedicular screws, and a member defining a member axis links lower and upper connectors on each side of the lumbar vertebra. Upon lateral flexion of one of the upper and lower vertebrae relative to the other, each lower connector is capable of multiaxis pivotable movement relative to the respective lower pedicular screws such that each member is capable to pivot with respect to (i) the axis of the lower screw, (ii) a first axis intersecting the lower screw and the lower connector, and/or (iii) an axis intersecting the above first axis and the lower screw, while the member can also move along the member axis.
摘要:
An apparatus and modeling method of the present invention includes the successive steps of generating cartographic data representative of points belonging to a glenoid surface; distinguishing from among the cartographic data a first group of cartographic data corresponding to a first part of the glenoid surface, the first surface part being situated farthest down in the vertical direction in relation to the scapula; calculating from the first group of cartographic data a first ellipsoid portion that coincides substantially with the first surface part; and obtaining a theoretical glenoid surface from the first ellipsoid portion. By virtue of the theoretical glenoid surface obtained by this method, it is possible to assist the surgeon in optimizing the position of implantation of a glenoid component and to produce a glenoid component “made to measure” for the scapula that is to be fitted with a prosthesis.
摘要:
The hinge mounting system according to the present invention is constituted of a link connector (10) comprising, on either side of a U-shaped opening (8), a first and a second vertical branch (11, 12) respectively cooperating through axes of rotation (13, 14) with a clamping element (15) enabling the linking rod (4) to be immobilized in translation and in rotation after it has been pivoted and locked above the opening (8) by a lock (16) elastically loaded by a leaf spring (29).
摘要:
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.
摘要:
A guidance device including two vertebral units adapted to be fixed to the posterior side of two adjacent vertebrae of the spine and wherein the two units have substantially spherical complementary articulation surfaces which, when the units are fixed to the vertebrae, extend overall on the posterior side of the vertebrae and slide against one another about a center point located in the intervertebral space that separates the vertebrae, and wherein the device also includes a mechanical element to limit an amplitude of the relative sliding of the articulation surfaces.
摘要:
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.
摘要:
An ancillary tool (10) comprising a trial humeral trochlea (202) that is representative of an anatomical humeral trochlea when the trial humeral trochlea is in place with respect to corresponding cubital (SC) and/or radial (SR) articular surfaces and a cut-out guide (30) for cutting an ulna (C) and/or a radius (R), wherein the cut-out guide (30) is adapted to be positioned with respect to the trial humeral trochlea (202). The cut-out guide (30) is also adapted to be positioned with respect to an ulna (C) and/or to a radius (R) equipped with the trial humeral trochlea (202).
摘要:
A humeral nail includes an elongated body, a plurality of interlocking devices and a locking device. The elongated body is at least partially insertable into a medullary canal of a humerus and has a proximal part with a plurality of orifices. The interlocking devices are insertable into the orifices to interlock initially split humeral fragments. The locking device is capable of locking the interlocking devices within the orifices. The locking device is free to move relative to the body between a free passage position in which the locking device enables free passage of the interlocking devices through the orifices, and a locking position in which the locking device locks the interlocking devices in position with respect to the orifices. The locking device has a plurality of openings, each of which has a free passage portion in alignment with a corresponding orifice when the locking device is in the free passage position, and a locking portion in alignment with the corresponding orifice and in engagement with a corresponding interlocking device when the locking device is in the locking position.
摘要:
This guidance device (100) comprises two vertebral units (110, 120) respectively designed to be fixed to the posterior side of two adjacent vertebrae (1, 2) of the spine. In order to guide these vertebrae stably and effectively in order to reproduce an intervertebral articulated joint between them, these teo vertebral units respectively define substantially spherical complementary articulation surfaces (111P, 121A) which, when the units are fixed to the vertebrae, extend overall on the posterior side of the vertebrae and slide against one another, being centered at one and the same geometric point (C) located in the intervertebral space that separates the vertebrae, while mechanical means (130) limit the amplitude of the relative sliding of the articulation surfaces.