RU153857U1 - DEVICE FOR OSTEOSYNTHESIS OF SKELETON BONES - Google Patents

Abstract

A device for osteosynthesis of skeleton bones, which is a metal plate with oval threaded holes for screws, characterized in that the oval threaded holes for screws are staggered; the surface of the plate in contact with the bone has a relief shape with protrusions around the oval threaded holes for screws in the form of a truncated cone and a continuous groove between the holes formed by contact of the bases of the cones with each other and coated with a spray of hydroxyappatite.

Description

DEVICE FOR OSTEOSYNTHESIS OF SKELETON BONES

The utility model relates to the field of medicine, namely to medical devices used to perform osteosynthesis of skeleton bones for injuries and diseases of the musculoskeletal system.

A device for fixing bone fragments during bone fractures is a skeleton, consisting of a metal plate without coating with round holes for screws (1).

The disadvantage of this device is the excessive pressing of the plate to the bone, and, as a consequence, the violation of microcirculation in the fracture zone, the lack of a stimulating effect on the consolidation of the fracture.

A device for fixing bone fragments, containing a metal plate without coating with a surface shape that allows to limit contact with the adjacent bone, and oval holes for screws (2).

The disadvantage of this device is the uncontrolled pressing of the plate to the bone, the lack of a stimulating effect on the consolidation of the fracture.

A device for fixing bone fragments is known, which is an uncoated metal plate with threaded holes for screws (3).

The disadvantage of this device is the excessive load at the junction of the screw-plate while maintaining the distance between the plate and the bone, the lack of a direct consolidating effect for the healing of the fracture.

The purpose of creating a utility model is to create limited contact between the plate and the bone, thereby not breaking the microcirculation in the fracture zone, additional consolidating effect in the fracture zone, and also to ensure uniform load distribution between the screws and the plate.

This goal is achieved by the fact that the device is a metal plate with oval threaded holes for screws arranged in a checkerboard pattern; the surface of the plate in contact with the bone has a relief shape with protrusions around the oval threaded holes for screws in the form of a truncated cone and a continuous groove between the holes formed by contact of the bases of the cones with each other and coated with a spray of hydroxyappatite.

Comparison of the proposed device with others known in the field of medicine, showed its compliance with the criteria of a utility model.

The utility model is illustrated by graphic material. In FIG. 1 shows a General view of the proposed device.

The proposed device for osteosynthesis of skeleton bones is a metal plate with oval threaded holes (1) for screws arranged in a checkerboard pattern. The surface of the metal plate in contact with the bone has a relief shape with protrusions (2) around the oval threaded holes (1) for screws in the form of a truncated cone and a continuous groove (3) formed between the protrusions and coated with a spray of hydroxyappatite.

The proposed device is used as follows.

After anesthesia, a skin incision is made in the area of the fracture, bone fragments are bluntly and sharply secreted. Perform reposition of fragments. The metal plate is mounted on the bone with a surface in contact with the bone, with emphasis on the protrusions (2) around the oval threaded holes (1) for the screws in the form of a truncated cone. Then, the required number of screws are screwed into the distal and proximal fragments through oval threaded holes (1). Thereby, the metal plate is pulled to the surface of the bone until contact between the protrusions (2) and the bone, while maintaining the distance between the continuous groove (3) formed between the protrusions and coated with hydroxyappatite spraying and the bone so that microcirculation in the fracture area is not disturbed. Then perform an audit, hemostasis and layer-by-layer suturing of soft tissues. If necessary, apply a plaster cast. In the postoperative period, dressings are performed as necessary. After the period of consolidation of the fragments, the axial load on the operated limb is allowed in combination with physiotherapy and physiotherapy. Clinical example:

Patient S.I.P. 34 years old he entered the Department of Traumatology and Orthopedics of the Clinics of Samara State Medical University on 02/04/2014 with a diagnosis of closed oblique fracture of the left tibia at the border of the middle and lower third with displacement of fragments. He was injured on 02/04/2014 as a result of a fall on ice. 02/06/2014, the operation was performed: osteosynthesis of the tibia using the proposed device. In the postoperative period, a plaster cast was applied from the lower third of the thigh to the fingertips in a functionally advantageous position for a period of 8 weeks. Up to 14 days after surgery, ligation was performed every other day. On the control roentgenogram of the left lower leg in two projections, the displacement of fragments of the tibia was eliminated, the plate and screws were installed in the correct position, the axis of the limb was restored.

After the period of consolidation of the fragments, the axial load on the operated limb is allowed, physiotherapy and physiotherapy for the lower limb are prescribed. Control radiographs of the left tibia were performed in two projections: there was a fracture fusion with the formation of a full bone callus, a continuous filling of the plate groove with bone tissue, and the absence of plate and screw migration. In the study of the statodynamic functions of the left lower limb, the restoration of the axis of the limb, the full axial load on the limb, the absence of pain when resting on the leg, and gait stability are determined.

Using the proposed device allows you to create a limited contact between the plate and the bone thereby not disturbing the microcirculation in the fracture zone, an additional consolidating effect in the fracture zone, as well as to ensure uniform load distribution between the screws and the plate. A device for osteosynthesis of skeleton bones is simple in a constructive way and reliable in operation.

The proposed device can and should be used in traumatology and orthopedic units of medical institutions.

INFORMATION SOURCES

1. Muller M.E., Algover M., Schneider R., Willinger X. / Guide to internal osteosynthesis. - M. Ad Marginem, 1996 .-- 780 p.

2. Shapovalov V.M., V.V. Khominets, S.V. Mikhailov / Fundamentals of Internal Osteosynthesis. - M .: GEOTAR-Media, 2009 .-- 240 s: ill. - (Library of the specialist doctor)

3. Implants and instruments for osteosynthesis Konigsee Implantante und instrumente zur osteosynthese Gmbh / Product catalog, 2010. - 36 p.

Claims (1)

A device for osteosynthesis of skeleton bones, which is a metal plate with oval threaded holes for screws, characterized in that the oval threaded holes for screws are staggered; the surface of the plate in contact with the bone has a relief shape with protrusions around the oval threaded holes for screws in the form of a truncated cone and a continuous groove between the holes formed upon contact of the bases of the cones with each other and coated with a spray of hydroxyappatite.

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