Guide device for attachment and transfixation of sliding plates for dynamic implants

Abstract

A guiding device for fixing flexible blades of spinal implants, which includes a guide device for transfixing flexible blades (1) that constitute the platforms (13) and (14), which have a box-shaped side, where the set of flexible blades (3) crosses and slides, and the other side has a hole (16) for its fixation to the double intermediate connector (5), which bears a pedicle screw (7); said set of flexible blades (3) being formed by two blades (4), overlapped, provided with longitudinal openings (9), through which they are joined by means of a fixing device (11), which allow them to slide over each other.

Claims

1. A guide device configured to transfix flexible blades (1) for postural correction and/or spine treatment, characterized in that it consists of a plurality of terminal platforms (13, 14), wherein each terminal platform receives a double intermediate connector (5) which includes a single piece with two halves, equipped with two through holes (19, 20), the hole (19) being flanked by walls (21) of the double intermediate connector (5) that are higher than walls of the double intermediate connector (5) that flank the hole (20), where a polyaxial threaded rod (6) is coupled with the hole (19), wherein the polyaxial threaded rod (6) consists of a cylindrical rod (23), whose lower end has a sphere (24) preceded by a threaded region (25), with the other hole (20) receiving a pedicle screw (7) on one side and a fixing screw (26) on the other, wherein the fixing screw (26) is threaded into a concentric hole (27) in a head of the pedicle screw (7), so as to fix the fixing screw (26) against an internal flange (8) provided in the hole (20), said internal flange (8) being responsible for orienting the angle of the pedicle screw (7) and therefore a plurality of double intermediate connectors (5) are provided, whose internal flange angles (8) vary for the different positions they occupy in a blade set (3).

2. A guide device configured to transfix flexible blades (1) for postural correction and/or spine treatment according to claim 1, characterized in that said terminal platforms (13, 14) are configured to keep vertebral structures of a segment intact.

3. A guide device configured to transfix flexible blades (1) for postural correction and/or spine treatment according to claim 1, characterized in that each polyaxial threaded rod (6) is configured to attach to a blade platform (4).

4. A guide device configured to transfix flexible blades (1) for postural correction and/or spine treatment according to claim 1, characterized in that the terminal platforms (13, 14) of the blades have a rail (18) where the blade set (3) will slide, whereas the terminal platforms (13, 14) have two sides, one side in a box shape where the blade set (3) will pass and slide and the other side has a hole (16) for attachment to a respective double intermediate connector (5).

Description

BRIEF DESCRIPTION OF THE INVENTION DRAWINGS

(1) In order to provide a better understanding of what constitutes the “GUIDE DEVICE FOR FIXING AND TRANSFIXING SLIDING BLADES FOR DYNAMIC IMPLANTS”, claimed herein, the accompanying illustrative drawings are presented, where one may see:

(2) FIG. 1—A side perspective view of two flexible, sliding and dynamic implants for selective stabilization and correction of spinal deformities and instabilities, one left and one right.

(3) FIG. 2—A bottom view of two flexible, sliding and dynamic implants for selective stabilization and correction of spinal deformities and instabilities, one left and one right.

(4) FIG. 3—A front view of two flexible, sliding and dynamic implants for selective stabilization and correction of spinal deformities and instabilities, one left and one right.

(5) FIG. 4—An exploded perspective view of the straight, sliding rod that comprises the flexible, sliding and dynamic implant for selective stabilization and correction of spinal deformities and instabilities.

(6) FIG. 5—A perspective view of the straight, sliding rod that comprises the flexible, sliding and dynamic implant for selective stabilization and correction of spinal deformities and instabilities.

(7) FIG. 6—An exploded view of the set formed by the terminal support, the ball joint, the double bearing and the pedicle screw.

(8) FIG. 7—A perspective view of the double bearing with the ball joint.

(9) FIG. 8—An exploded perspective view of the double bearing with the ball joint.

(10) FIG. 9—A rear perspective view of the terminal support.

(11) FIG. 10—A front perspective view of the terminal support.

(12) FIG. 11—A front view of the terminal support.

(13) FIG. 12—A front perspective view of the sliding support.

(14) FIG. 13—A perspective view of the set of double bearings that integrate the implant system in question, where one may see, from top to bottom, in the left column: the double lumbar bearing, whose pedicle screw projects in the perpendicular direction; the lumbar bearing whose screw protrudes five degrees; and the lumbar bearing whose screw protrudes fifteen degrees. In the right column: the thorax bearing whose screw projects in the perpendicular direction; the thorax bearing whose screw protrudes five degrees and the double thorax bearing whose screw protrudes fifteen degrees.

DETAILED DESCRIPTION OF THE INVENTION

(15) In accordance with the figures above, the “GUIDE DEVICE FOR FIXING AND TRANSFIXING SLIDING BLADES FOR DYNAMIC IMPLANTS”, the object of this patent, consists of a guide device for transfixing flexible blades (1), for postural correction and/or spine treatment comprising all degrees of natural mobility equivalent to a healthy spine.

(16) Said flexible blades (4) integrate an articulated vertebral prosthesis (2) consisting of two sets of blades (3), which are mounted on both sides of the operated spine.

(17) Said set of blades (3) comprises two overlapping thin blades (4), which can be slid longitudinally over each other and are positioned on the rails of two end platforms (13) and multiple sliding platforms (14), whereas each end is fixed to the respective terminal platform (13) through screws (17).

(18) Said terminal platforms (13) and slides (14) integrate a guide device for transfixing flexible blades (1), which also comprise double intermediate connectors (5) shaped like a boomerang, which have polyaxial threaded rods (6) and pedicle screws (7).

(19) Said pedicle screws (7) are attached to the bone region of each vertebra, relative to the vertebral extension to be implanted, of the patient, and the polyaxial threaded rods (6) project to the opposite side in relation to the pedicle screws (7). Said pedicle screw (7) is outside the bone surface and has a central hole (27), which receives a small screw (26), which fixes the double intermediate connector (5), which fits in the head of said pedicle screw (7).

(20) More specifically, the set of blades (3) consists of two identical, thin, rigid blades (4), of elongated geometry and with rounded edges, i.e. without sharp edges and with an oblong longitudinal opening (9) that occupies approximately half of its length, with a tilted edge (10).

(21) Said blades (4) are overlapped and joined by means of two fasteners (11) that are fitted in each longitudinal opening (9) provided for in the blades (4) and affixed to the ends of the other blade (4), using screws (12).

(22) Said fasteners (11) are flat rectangular elements, with rounded smaller sides, which fit into the inclined edges (10) of the longitudinal openings (9) and allow the blades (4) to slide longitudinally with each other. There are also two through-holes with a truncated conical profile aligned longitudinally in the median line of the said fastener (11).

(23) Two terminal platforms (13) are attached to the set of blades (3), one at each end and multiple sliding platforms (14) along its length.

(24) Said terminal platform (13) is constituted by a hollow quadrangular element and open in the whole of its lower and upper face, provided with a threaded circular hole (15) in its upper face and with a hole (16) that protrudes from the left side.

(25) At each end of the rectilinear structure, a terminal platform (13) is attached by means of a screw (17) inserted and threaded into the threaded circular hole (15), which passes through a circular hole (29), provided in that region of the blade (4), and contacts the bottom face of the terminal platform (13).

(26) The sliding platform (14) has the same conformation as the terminal platform (13), but without the threaded circular hole, i.e. it consists of a hollow quadrangular element and opened in the whole of its lower and upper face, in the form of a box comprising a track (18) where the set of flexible blades (3) passes and slides, and on the opposite side there is a hole (16), for attachment to the double intermediate connector.

(27) Said sliding platforms (14) are coupled to the set of blades (3) and are positioned along its length in positions coincident with the respective vertebrae to which the pedicle screws will be attached.

(28) Each platform (13) and (14) receives a double intermediate connector (5) comprised of a monoblock piece, in the form of a boomerang, equipped with two through holes (19) and (20), the hole (19) being flanked by higher walls (21), where a polyaxial threaded rod (6) is coupled, which consists of a cylindrical rod (23), whose lower end has a sphere (24) preceded by a threaded region (25). The other hole (20) receives a pedicle screw (7) on one side and a fixing screw (26) on the other, which is threaded into the concentric hole (27) in the head of the pedicle screw (7), in order to attach it against an internal flange (8) provided in the hole (20). Said internal flange (8) is responsible for orienting the angle of the pedicle screw (7) and, therefore, several double intermediate connectors (5) are provided, whose internal flange angles (8) vary for the different positions they occupy in the set of blades (3).

(29) The cylindrical rod (23) of the threaded polyaxial rod (6) is passed through the hole (19) of the double intermediate connector (5) and hole (16) of the platform (13) or (14) and fixed by means of a nut (28) which is threaded in the threaded region (25).

(30) One may see that the internal flanges (8) of the double intermediate connectors (5) have different angles, so that the respective pedicle screws (7) are at suitable angles for attaching the implant to the respective vertebra and, therefore, each type of double intermediate connector (5) has a specific position.

(31) The upper terminal platform (13) is affixed to the first corresponding upper vertebra of the vertebral extension to be implanted and the lower terminal platform (13) is affixed to the last lower vertebra of that extension and the sliding platforms (14) are affixed to the vertebrae contained within said range.

(32) These implants are a set of two or more flexible blades, which slide between themselves and within the platforms.

(33) It is certain that, when this invention is put into practice, modifications may be introduced regarding certain construction and form details, without that fact implying a departure from the fundamental principles that are clearly substantiated in the claim framework, with it thus being understood that the terminology employed was chosen for the purpose of description and not limitation.