SU1748806A1 - Device for fixing the fragments of the mandible - Google Patents

Abstract

Use: in medicine to provide dents prosthetics in case of mandibular fracture. SUMMARY OF THE INVENTION: The device is made of a material with a memory effect of a shape and contains a bracket with legs 1 and a jumper 2. At least one of the legs 1 is made in the form of a helical cylindrical spring 3 sludge.

Description

1

The invention relates to medicine, namely to surgical dentistry, and can be used for osteosynthesis of the mandible with partial or complete absence of teeth and fixation of a bone graft of a vascularized bone flap.

The purpose of the invention is to provide the possibility of dental prosthetics. .

The goal is achieved by the fact that in a device containing a bracket made of metal with a shape memory effect, at least one of the legs of the bracket is made in the form of a helical cylindrical spring. In this case, it is advisable to perform the specified spring from a material with a shape memory effect.

The leg of the shackle, made in the form of a helical cylindrical spring, when inserted into the bone, is an element of the clamp fastening and ensures fixation and compression of the bone fragments. The leg in the form of a helical coil spring acts as a hollow frame for fixing the base of the denture. It does not require auxiliary means, since the inner surface of the helical coil spring is a screw thread.

Fig. 1 shows a device with one leg of attachment in the form of a helical coil spring; Fig. 2 shows the position and state of the device with one leg in the form of a helical coil spring after insertion into the intraosseous channels and shape repair; FIG. 3 shows a device as supports for prosthetic dentistry.

A device for fixing the bone fragments of the fragments of the lower jaw contains a bracket with two legs 1, connected by a bridge with arc-shaped bends 2. In this case, at least one leg is made in the form of a cylindrical spring.

Depending on the number of missing teeth, use either a device with one leg in the form of a helical coil spring, or a bracket with two fastening feet in the form of helical coil springs. In this case, respectively, either one or two separated supports for dentures are formed.

The device is used as follows.

For treating lower jaw defects with a bone graft, which bridges the defect area, one of the applications for the device is as follows. Indent 1-1.2 cm from each

The edges of the graft in its alveolar part are formed along one cylindrical channel according to the size of the spring of the endosseous part. In the relevant fragments

the lower jaw, as well as the distance from its lateral edge, form one hole for the leg of the device. The distance between the coil spring channel and the adjacent indicated hole at

0 this is chosen to exceed the distance between the legs of the bracket.

Having made up the graft and its own fragment of the jaw with the fitted edges, deform the previously cooled (for example, chloroethyl) bracket by stretching between the legs to the distance between the formed channel and the hole, and in a cooled state a helical cylindrical spring and another leg are inserted. into the appropriate channels. After warming up, the arcuate portion of the staples under the action of the martensitic formation-repair forces tightly shifts the graft and an oral fragment of the jaw. The same device is likewise installed in the docking area of the opposite lateral edge of the graft with the edge of another intrinsic part of the body. Thus, in the alveolar part of the graft, two supporting metal frames are formed, the cavities of which are ready for dental prosthetics.

In case of fracture of the lower jaw with the absence of part or all of the dental array, it is possible to use the proposed device, in which both legs are made in the form of cylindrical springs.

The strength of fixation and stability of the spring position in the channel can be increased, and consequently, the function of the support for dental prosthetics will be improved when the spring is made of a material with a shape memory effect. In this way

5 applications in any of the above situations will be complemented by the following. The spring receiving channel is slightly smaller in diameter than the spring diameter. The device in the cooled state undergoes additional deformation in the region of the cylindrical spring by its angular twisting in the direction of the spring twist. This can be accomplished, for example, with a collet chuck. Behind

5, the diameter of the spring is reduced, and in this state it is freely (because its diameter is less than the diameter of the channel) introduced into the channel. The form restoration following the heating leads to recovery of the spring diameter and. therefore, wedging each turn in the channel, i.e. the spring is firmly in contact with the walls of the channel along the entire outer surface of the spring. Due to the selection of the diameters of the channel and the spring, even uniform immersion of the coils into the channel wall can even be achieved due to slight bone resorption.

The device allows, along with the fixation of the bone fragments of the mandible, to carry out dental prosthetics without additional surgical operations and technical means, as well as to reduce the likelihood of displacement of the fastening elements.

0

five

as a result of bone resorption due to an increase in the contact area of these attachment elements with bone tissue.

Claims (1)

Claim device A device for fixing fragments of the lower jaw, made of a material with a shape memory effect in the form of a staple with legs, characterized in that, in order to increase the reliability of fixation while allowing for tooth prostheses, helical coil spring. Fig 2 Figz