RU147762U1 - SYSTEM OF BLOCK COMPRESSION OSTEOSYNTHESIS OF BONES OF FACIAL SKELETON - Google Patents

Abstract

A system of block compression osteosynthesis of the bones of the facial skeleton, containing metal plates of the same size, a piece of metal wire with a square cross section, and self-tapping screws, characterized in that each of the metal plates has a first through channel, inside which a piece of metal wire with a square cross section is placed, and a second the through channel, which is made in the form of a self-tapping screw, is perpendicular to the channel for a piece of metal wire with a square section and communicates with the first channel through an aperture in the inner chamfer, wherein in the conical surface of the head of each screw of the screw-lock notches formed.

Description

This utility model relates to the field of medicine, in particular to traumatology and maxillofacial surgery.

A compression mini-plate for osteosynthesis of the lower jaw is known from the prior art, which has a hole at one end for a compression tool, the side of this hole located closer to the end of the mini-plate is straight and perpendicular to the longitudinal axis of the plate, and the middle third mini-plate has a sectional area greater than the area of its section between the fixation holes, the plate itself may be of various configurations (see. patent RU №2403882, ⁸ IPC A61B 17/80, applicants Gos Donated Educational Institution of Higher Professional Education "Moscow State University of Medicine and Dentistry of the Federal Agency for Healthcare and Social Development of the Russian Federation" and the Limited Liability Company "CONMET", publ. 20.11.2010).

The disadvantages of the indicated technical solution are the dependence of the configuration of the used mini-plate on the localization and nature of the fracture, the use of additional special tools for compressing bone fragments, the inability to intraoperatively simulate the configuration of the plate, the possibility of fracture when exposed to a repeated traumatic agent.

Creating a system for block compression osteosynthesis of the bones of the facial skeleton, provides a technical result, which consists in the following:

to simplify the design and use;

in creating stable fixation of bone fragments with the possibility of intraoperative modeling of the device configuration;

in compression of bone fragments, regardless of the location and nature of the fracture;

in increasing resistance to deformation under the action of a repeated traumatic agent.

The technical result is achieved by the fact that the system of block compression osteosynthesis of the bones of the facial skeleton contains metal plates of the same size, a piece of metal wire with a square section and self-tapping screws, and each of the metal plates has a first through channel, inside which a piece of metal wire with a square section is placed , and the second through channel, which is made in the form of a self-tapping screw, is perpendicular to the channel for a piece of metal wire with a square cross section and communicated with the first channel through an opening in the inner chamfer, and on the conical surface of the head of each self-tapping screw, locking notches are made.

A feature is that the metal plates have a first through channel through which a piece of metal wire with a square section passes, and a second through channel for a self-tapping screw, which is perpendicular to the channel for cutting a metal wire with a square section and communicates with it using an opening in the inner chamfer, the self-tapping screw has locking notches on the conical surface of the head and is placed in the second through channel, intended for the self-tapping screw, with the kinematic contact with the flat surface of the wire and the conical surface of the specified channel.

The essence of the utility model is illustrated by drawings.

In FIG. 1 is an isometric view of a metal plate with a wire.

In FIG. 2 shows a top view of a metal plate of FIG. one.

In FIG. 3 shows a view of a metal plate with a side along the axis of the wire with a cut along the axis of the second channel.

In FIG. 4 shows a view of a metal plate from its side with a cut along the axis of the second channel.

In FIG. 5 shows a self-tapping screw.

In FIG. 6 is an isometric view of wired plates with self-tapping screws.

In FIG. 7 shows a system of compression osteosynthesis of the bones of the facial skeleton with the first bone fragment

In FIG. Figure 8 shows the system of compression osteosynthesis of the bones of the facial skeleton with the first and second bone fragment

In FIG. 9 shows a system of compression osteosynthesis of the bones of the facial skeleton with the first, second and third bone fragment.

The system of block compression osteosynthesis of the bones of the facial skeleton contains metal plates 1 of the same size, a segment 2 of a metal wire with a square cross section, and self-tapping screws 3. Metal plates 1 have a first through channel 4, inside which a section 2 of a metal wire with a square section is placed, and a second through channel 5, which is made in the form of a self-tapping screw 3, is perpendicular to the first channel 4 for a piece 2 of a metal wire with a square cross section and communicated with rvym channel 4 through the opening 6 in the inner chamfer 7, self-tapping screw 3 has in the conical surface 8 of the head 9 detent notches 10.

The system operates as follows.

The first plate 12 is attached to the first bone fragment 11 using a self-tapping screw 3 with locking notches 10. In the first plate 12, a length of 2 metal wire with a square section of a given length, which is located in the first channel 4, is inserted into the second channel through the first channel 4 - 5 self-tapping screw 3, installed with the possibility of kinematic contact with a piece of 2 metal wire through the hole 6 in the inner chamfer 7. Fastening occurs by twisting in the direction of the thread in the first bone fragment 11 of the self-screw cutter 3 and fixation with stopper notches 10 of the conical surface 8 of the head 9 of the self-tapping screw 3 in the second channel 5 along its conical chamfer 7 of the first plate 12. Thus, the first plate 12 is fixed to the first bone fragment 11. Then, a piece of 2 metal wire is inserted with square section into the first channel 4 mounted on the second bone fragment 13 of the second plate 14, into the channel for a piece of metal wire 2 with a square section of the second plate 14 and also fix it to the second bone fragment 13 corresponding a self-tapping screw 3 with locking notches 10 by twisting along its thread in the clockwise direction. When screwing the self-tapping screw 3 into the second bone fragment 14 clockwise, due to the presence on the conical surface 8 of its head retaining notches 10 that provide kinematic contact between the length of the metal wire section 2 with a square cross section, the conical surface 8 of the screw head 3 and the conical bevel 7 of the second channel 5 there is a shift of the segment 2 of the metal wire with a square section in the direction of its rotation, i.e. clockwise. Thus, the first plate 12 and the second plate 14, respectively fixed on the first 11 and second 13 bone fragments, come together, which provides compression of these bone fragments 11 and 13. In the exact same sequence, the installation of subsequent plates. The number of plates used depends on the location and nature of the fracture. Plates can be made relatively small, for example, for osteosynthesis of childhood fractures. The plates are made of the same size and this simplifies their manufacture and use.

Due to the use of plates 1 of the same size, connected by a piece of 2 metal wire with a square cross section, which has plasticity and the ability to bend in the required configuration, it is possible to simulate the existing configuration of the system of bone fragments during block compression osteosynthesis of the bones of the facial skeleton by adapting the configuration of the segment 2 of the metal wire with square section 2, with ductility and the ability to fix the shape. The ductility of the segment 2 of the metal wire with a square cross section and the small size of the plates 1 makes it possible to change the configuration of the arrangement of the plates 1, the relative mobility of the structure, and one fixation point eliminates bending stresses and kink of the metal plate, which ultimately provides increased resistance to deformation under the action of repeated traumatic agent.

The use of self-tapping screws 3 with locking notches 10, providing kinematic contact between a piece of metal wire with a square cross-section 2 and the conical surface of the head of the self-tapping screw, provides a stable stable position of the self-tapping screw 3 along the conical bevel 7 in the second channel 5 for the self-tapping screw 3 and thereby stable fixation of bone fragments 11 and 13.

Claims (1)

A system of block compression osteosynthesis of the bones of the facial skeleton, containing metal plates of the same size, a piece of metal wire with a square cross section, and self-tapping screws, characterized in that each of the metal plates has a first through channel, inside which a piece of metal wire with a square cross section is placed, and a second the through channel, which is made in the form of a self-tapping screw, is perpendicular to the channel for a piece of metal wire with a square section and communicates with the first channel through an aperture in the inner chamfer, wherein in the conical surface of the head of each screw of the screw-lock notches formed.

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