RU40169U1 - DEVICE FOR REPAIR OF BONE DEFECT - Google Patents

Abstract

A utility model - a device for compensating for a bone defect - relates to medical equipment and can be used in the treatment of patients with defects of limb bones. The objective of the claimed utility model is to develop the design of a device for compensating for a bone defect, providing a reduction in the weight of the apparatus and simplification of its operation. A device for compensating for a bone defect contains the main and intermediate supports with spokes connected by threaded distractors, as well as fastening elements, equipped with at least one guide mounted on one of the main supports, while the intermediate support is mounted on one of the threaded distractors and contacts the guide with the possibility of move on last.

Description

A utility model - a device for compensating for a bone defect - relates to medical equipment and can be used in the treatment of patients with defects of limb bones.

Known compression and distraction apparatus (1), in the embodiment, the layout for the compensation of a bone defect containing interconnected threaded distractors supports with spokes and installed on them traction with spokes. However, fixation of bone fragments by traction knitting needles does not provide a sufficient level of stability, which negatively affects the process of regenerate formation:

its thinness appears, deformation is formed, etc.

A known embodiment of the apparatus for compensating for a bone defect (2), in which an additional support is mounted on threaded distractors with the ability to move. However, the use of such a support, as well as the method of its fastening, lead to an increase in the weight of the apparatus and, when dosed, it is necessary to tighten at least three pairs of fixing nuts.

The objective of the claimed utility model is to develop the design of a device for compensating for a bone defect, providing a reduction in the weight of the apparatus and simplification of its operation.

This problem is solved in that the device for the compensation of a bone defect, containing the main and intermediate supports with spokes connected by threaded distractors, as well as fastening elements, is equipped with at least one guide mounted on one of the main supports, and the intermediate support is mounted on one of the threaded distractors and is in contact with the guide with the ability to move along the latter.

The inventive utility model is illustrated by a description and diagram, which depicts:

Figure 1 - device for the compensation of a bone defect, General view.

A device for compensating for a bone defect contains the main 1,2 and intermediate 3 supports with 4 spokes 5 fixed to them with the help of special bolts, connected by threaded distractors 6. Guides 7 are installed on one of the main supports 1 or 2, the free ends of which are inserted in the holes of the intermediate support 3, fixed with the possibility

movement on one of the threaded distractors 6. The fastening of parts and components of the device is performed using bolts 8 and nuts 9.

A device for compensating a bone defect is used as follows.

After anesthesia and treatment of the surgical field with known techniques, osteosynthesis of the affected segment of the limb is performed. During its implementation, the locking spokes 5 are carried out through the distal and proximal ends of the segment, as well as in the area of the diaphysis of the fragment, on which it is planned to form a fragment for dosed compensation of the existing bone defect. In the tensioned state, the spokes 5 are mounted on external supports 1, 2, 3 installed at the appropriate level, which are connected to each other by threaded distractors 6. In this case, the intermediate support 3 is mounted only on one of the threaded distractors 6. Additionally, on one of the main supports 1 or 2 set the guide 7, made, for example, in the form of a smooth rod with a threaded thread (not shown) at one end for mounting on a support. In this case, the free end of the guide 7 is passed into the hole of the intermediate support 3 so that the latter has the possibility of free movement (sliding) along the guide. Depending on the configuration and size of the intermediate support 3, a different number of guides 7 can be used in the device: one, two, three, etc.

Upon completion of the installation of the device, the position of its individual parts and assemblies is stabilized by tightening the bolts 8 and nuts 9.

In the postoperative period, a metered dose compensation of a bone defect is made by moving a bone fragment in it, extracted from the end of one of the bone fragments. For this, the intermediate support 3 with the spokes 5 fixing the indicated fragment is moved in the required direction along one of the threaded distractors 6 and the guides 7. The specified support is displaced by tightening the nuts 9, fixing its position on one of the threaded distractors 6. Unfixed ends of the support 3 while freely moving along the guides 7, which eliminates its skew. After the defect is repaired, the nodes of the apparatus are stabilized until the formed regenerate is rearranged into mature bone tissue, and then dismantled in the reverse order.

Thus, the use of the proposed device reduces the weight of the device and simplifies its operation.

Sources of information taken into account:

1. Shevtsov V.I., Makushin V.D., Kuftyrev L.M. “Defects of bones of the lower extremities” ./ Kurgan-1996, 502 p.

2. A.S. USSR N 538710. Publ. 12/15/76. Bull. 46.

Claims (1)

A device for compensating for a bone defect containing the main and intermediate supports with spokes connected by threaded distractors, as well as fastening elements, characterized in that it is provided with at least one guide mounted on one of the main supports, and the intermediate support is mounted on one of the threaded distractors and contacts with a guide with the ability to move along the latter.