SU1715338A1 - Spine positioner - Google Patents

Abstract

The spinal fixator is designed to increase the rigidity of the fixation of the vertebrae. The clamp contains a curved plate 1 with holes for the fixing screws 4. An additional plate 2 with side guides and holes 7 is inserted into the clamp. The curved plate 1 is made with beveled sides and is mounted with an additional plate 2 that is movable. The holes 7 in the latter are larger than the diameters of the heads of 6 screws 4. 11 Il.

Description

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The invention relates to medical technology, namely to traumatology and orthopedics.

The aim of the invention is to increase the rigidity of the fixation of the vertebrae.

Fig, 1 shows a spinal fixative without fixing screws; figure 2 - section aa in figure 1; on fig.Z constructive execution of the profiled plate; 4 is a section b & b of FIG. 3 (with one embodiment of the plate); Fig. 5 shows the same with another embodiment of the plate; Fig. 6 shows a constructive implementation of an additional plate, a frontal projection; Fig. 7 is a horizontal projection of one of the embodiments of an additional plate; on Fig - the same; another embodiment; figure 9 is a latch mounted on the spine; in fig. 10 — node I in FIG. 9 (clamp on an enlarged scale); FIG. 11 is a view B of FIG. ten.

The spinal fixator contains a profiled base plate 1 and an additional patch plate 2 mounted on the outer part of the main plate 1 with the possibility of forced longitudinal movement relative to the main plate.

The main plate 1 has radial holes 3 for holding fixing screws 4 and recesses 5 are made on its outer side to place heads 6 of screws 4 in the way.

Plates 1 and 2 are of equal length. Analog 9, to the location of the holes 3 in the plate 1 in the additional overlay plate 2, holes 7 are made with a diameter slightly exceeding the diameter of the heads 6 of the screws 4, which ensures that the screws 4 are installed in the plate 1 while the plate 2 is on the plate 1.

Plate 1 with its inner side, which it is installed on the spine, has a concave surface. The outer side of the plate 1 can be made both in a flat shape and can be formed by a convex surface -. The side longitudinal sides 8 of the plate 1 are made obliquely.

Plate 2 contains side bent guides 9, with which it covers the side sides 8 of plate 1 with preliminary tension and forms a movable joint with plate 1. The shape of the plate 2 corresponds to the shape of the outer surface of the plate 1. on which it is installed.

Fixatively as follows.

For example, in order to perform the intertelpal spondyls operation, behind the cervical spine, the main plate 1 with the plate 2 placed on it is placed on the front surface of the bodies of the corresponding vertebrae.

Then through the aligned holes 7

0 and 3 fixing screws 4 are screwed into the bodies of the vertebrae 10 (Fig. 8). After installing the screws 4 and fastening the poles of the 10 with the help of the plate 1, when the heads 6 of the screws 4 are in the recesses 5, do not leave

5, the outer surface of the plate 1 is secured by locking the screws 4 by displacing the plate 2 on the plate 1. For locking the screws 4 it is sufficient to slightly move the plate 2 relative to the plate 1 until the ends of the plates 1 and 2 are aligned (Fig.9.10).

When this occurs, the holes 7 are displaced relative to the holes Zi; the plate 2 partially (or completely) overlaps the thrusts of the 6 screws 4, thereby preventing

unscrewing them from the vertebral bodies.

Removal of the proposed fixer from to. the bell is similar

way in reverse order. To do this, first move the plate 2 relative to the plate 1 to align the holes 7 with the holes 3, and then unscrew the screws 4 from the vertebral bodies 10 and remove the plates 1 and 2 together from the spine.

5 As a result of the proposed implementation of the spinal fixer, the locking of the screws is carried out without injury to the adjacent spinal column and without increasing the size of the fixatives.

0 The use of the clamp prevents spontaneous unscrewing of the fixing viitov from the vertebral bodies, which is in its own. the turn excludes various postoperative complications.

Formula from the gain

Spinal fixator containing profiled plate with holes

0 for fixing screws, characterized in that, in order to increase the rigidity of the fixation of the vertebrae, an additional plate with guides on the sides and holes is inserted into it, the curved plate is made with beveled sides and an additional plate is mounted on it, and in the additional plate is larger than the diameter of the screw heads.

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Claims (1)

Claim A spinal retainer comprising a profiled plate with holes 50 for fixing screws, characterized in that, in order to increase the rigidity of the vertebral fixation, an additional plate with guides on the sides and holes is inserted into it, a curved plate 55 is made with beveled sides and mounted on it an additional plate with the ability to move, and the holes in the additional plate are larger than the diameter of the screw heads. MB FIG. B Editor S. Lisina Compiled by L. Cooks Tehred M. Morgenthal Corrector LLatay Order 555 Circulation Subscription VNIIIPI of the State Committee for Inventions and Discoveries under the State Committee for Science and Technology of the USSR 113035. Moscow. Zh-35, Raushskaya nab., 4/5 Production and Publishing Plant Patent, Uzhgorod, Gagarin St. 101