Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Implantable prosthesis – Bone
Patent
1998-01-12
2000-02-22
Yu, Mickey
Prosthesis (i.e., artificial body members), parts thereof, or ai
Implantable prosthesis
Bone
606 60, 606 61, 606 62, 606 63, 606 64, A61F 500, A61F 501, A61F 504, A61B 1758
Patent
active
060275332
DESCRIPTION:
BRIEF SUMMARY
FIELD OF INVENTION
The present invention relates to a device intended for fixating and adjusting the positions of vertebrae in vertebral or spinal surgical operations and including two mutually crossing and generally rod-shaped implant elements.
DESCRIPTION OF THE BACKGROUND ART
Many different solutions concerned with locking and fixating two generally rod-shaped implant elements placed one on the other such as to correct and stabilize adjacent vertebra have been proposed in the art. The devices used to this end are often bulky and can cause the patient considerable discomfort. These known devices are often difficult to apply and have a complicated and relatively often illogical design, making handling of the devices difficult.
BRIEF DESCRIPTION OF THE INVENTIVE CONCEPT
The object of the present invention is to eliminate the aforesaid drawbacks of known devices for locking and fixating generally rod-shaped implants, and to provide a device which can be readily manipulated quickly and smoothly and which will bind together two mutually crossing implant elements with no mechanical strength impairment.
This object is achieved in accordance with the invention by means of an implant element locking device which includes four generally parallel and elongated elements projected on a plane through two of the elements whose ends are located essentially in the corners of a parallelogram, preferably a square, wherein the ends of said elements are mutually connected in pairs by means of mutually parallel curved members which arch outwardly from the ends of the elongated elements, wherein the pair of curved members at one end of the elongated elements are perpendicular to the pair of curved members at the other end thereof, wherein each pair of curved members embraces a rod-shaped implant element together with respective adjacent mutually crossing rod-shaped elements, and wherein those sides of the elongated elements that lie against a rod-shaped element are essentially flat and essentially parallel with respective opposing sides of an adjacent elongated element for fixating and adjusting the position of vertebrae.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of one embodiment of an inventive device.
FIG. 2 shows the device of FIG. 1 with two mutually crossing rod-shaped implant elements in a locked and fixated state.
FIG. 3 is a side view of the device shown in FIG. 1.
FIG. 4 shows the device of FIG. 1 from above.
FIG. 5 is a side view of another embodiment of the inventive device.
FIG. 6 shows the device of FIG. 5 from above.
FIG. 7 is a perspective view of the device shown in FIG. 5.
FIG. 8 shows the device of FIG. 5 with a first rod-shaped implant placed in the bottom of the device.
FIG. 9a shows the device of FIG. 8 with a second implant in the form of a bone screw placed at an angle of generally 90.degree. to the rod-shaped first implant and comprising a second embodiment of the implant locking device.
FIG. 9 shows the device of FIG. 8 with a second implant in the form of a bone screw placed at an angle of essentially 90.degree. to the rod-shaped first implant, and comprising a further embodiment of the implant locking device.
FIG. 10 is a schematic sectional view of a slotted bone screw with a conical screw lying therein.
FIG. 11 shows another embodiment of the device with the second implant in the form of an elongated element which is curved at one end and slotted at the other end, this latter end being provided with a bore for receiving a conical screw.
FIG. 11a is a longitudinal sectioned side view of the second implant shown in FIG. 11.
FIG. 12 shows the implant of FIG. 11 from the short end.
FIG. 13 shows the implant of FIG. 11 from above.
FIG. 14 shows the device of FIG. 8 with a second implant according to FIG. 11 placed at an angle of substantially 90.degree. to the rod-shaped first implant, and comprising an implant locking screw, this view being taken from above.
DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT OF THE INVENTION
FIGS. 1 through 4 illustrates the main componen
REFERENCES:
patent: 5092867 (1992-03-01), Harms et al.
patent: 5368594 (1994-11-01), Martin et al.
Koh Choon P.
Yu Mickey
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