RU47699U1 - IMPLANT WITH FOUR RIGBERS POLYMERIC HYBRID FOR CORRECTION OF BARBON BENDING - Google Patents

Abstract

The utility model relates to medical equipment and can be used in reconstructive operations in traumatology and orthopedics. The model is a structure consisting of three parts connected by a medlow, in which the central part is made in the form of an octagonal rod with four stiffeners, with geometric dimensions: diameter of the circumscribed circle, mm from 4.0 to 10.0 length, mm \ tab from 4.0 to 40.0 and the two end ones are made in the form of a pyramid and a pointed cylinder, the base area of which is from 20 to 50% of the cross-sectional area of the supporting part, with geometric dimensions: diameter of the supporting part, mm \ tab from 2.0 up to 5.0 length, mm \ tab from 3.0 to 10.0 and all parts of the implant are made of a copolymer of vinyl pyrrolidone with methyl methacrylate PPM-1, capron fiber and calcium gluconate, and the supporting part has from 1 to 4 inserts with geometric dimensions on the surface: length from 3 up to 10 mm, width from 1 to 3 mm, thickness from 0.3 to 2.5 mm; made from a copolymer of PPM and a drug substance.

Description

The utility model relates to medical devices, namely to products used in traumatology and orthopedics.

Known use of wedge-shaped bone grafts for the treatment of correction of curvature of the tubular bones (IA Movshovich, Operative orthopedics. M., Medicine, 1983, p.267). However, the use of such implants has a number of disadvantages:

- when using autografts, the patient is inflicted additional trauma on the graft intake;

- after transverse osteotomy, correcting the axis of the bone and introducing a wedge-shaped implant, it occupies the entire volume of diastasis and the formation of a new bone regenerate occurs only after biodegradation of the wedge-shaped implant, which significantly increases the recovery time of the musculoskeletal function of the limb;

- complant graft does not provide reliable fixation of fragments for the period

regeneration due to the process of bone graft resorption;

The technical task of the proposed utility model is the creation of implants from synthetic biodegradable materials with high strength characteristics, which ensures reliable fixation of bone fragments for the entire period of consolidation and creates the possibility of incomplete filling (30-50%) of the volume of diastasis formed, providing earlier formation of new bone a regenerate, an implant that eliminates the need for additional trauma when taking a bone graft, the size of which zhno if necessary adjusted directly during operation. The technical result is achieved by the fact that the utility model is made in the form of a structure consisting of three parts interconnected:

the central supporting part in the form of a rod with four stiffeners with geometric dimensions:

diameter of the circumscribed circle, mm from 4.0 to 10.0 length mm 4.0 to 40.0

and two end parts in the form of a cone or a pointed cylinder, the base plane of which adjoins the central rod and makes up from 20 to 50% of the cross-sectional area of the central rod, with geometric dimensions:

base diameter, mm from 2.0 to 5.0 length mm from 3.0 to 10.0

moreover, all parts of the implant are made of a copolymer of vinylpyrrolidone with methylmethacrylate, capron fiber (aramid fiber - thurlon) and calcium gluconate in the following ratio of components (% wt.):

Vinylpyrrolidone copolymer

with methyl methacrylate 30.0-50.0 \ tab30.0-50.0 Nylon fiber 45.0-60.0 \ tab29.0-39.0 Calcium gluconate 5.0-10.0 \ tab15.0-29.0 Aramid Fiber Terlon 16.0-22.0

The essence of the utility model is expressed in the fact that the implant, due to the prefabricated part, supporting shoulders and pointed ends embedded in the bone tissue, reliably holds bone fragments in the repositioned position, the implant made of polymer materials is capable of biodegradation in the body and is gradually replaced by bone regenerate, the implant fills the diastasis volume only by 30-50%, which

provides rapid formation of bone regenerate in free space, implantate is easily cut with surgical instruments.

The use of a polymer implant provides reliable fixation of bone fragments for the period of their consolidation, creates conditions for the rapid and complete filling of the diastasis volume with its own bone regenerate, reduces the number of postoperative suppurations

The proposed utility model operates as follows. After transverse osteotomy, bone fragments are placed in the correct anatomical flow, the dimensions of the resulting diastasis are measured and 1-3 implants are inserted into it, corresponding sizes that can be additionally changed, ensuring the introduction of the pointed ends of the implant into the bone fragments and supporting the bone fragments on the shoulders of the supporting parts of the implant. The wound is sutured in layers and a plaster bandage or external fixation device is applied.

Utility Model Manufacturing Examples

Example No. 1

0.22 g of a prepreg, consisting of 30% of a copolymer of vnylpyrrolidone with methyl methacrylate, 39% of capron fiber, 22% of aramid fiber, terlon and 9% of calcium gluconate, are placed in the mold and, at a temperature of 175 ° C, the implant is formed with a central supporting part with dimensions: diameter of the circumscribed circle 4 mm, length 20 mm, the pointed part of which is made in the form of a cone with a base diameter of 2 mm and a length of 5 mm, while the area of the base of the cone is 50% of the cross-sectional area of the supporting part.

Example No. 2

0.18 g of a prepreg, consisting of 35% copolymer of vnylpyrrolidone with methyl methacrylate, 37% capron fiber, 20% aramid fiber terlon and 8% calcium gluconate is placed in the mold and, at a temperature of 185 ° C, the implant is formed with a central supporting part with dimensions: the diameter of the circumscribed circle is 8 mm, the length is 40 mm, the pointed part of which is made in the form of a cone with a base diameter of 3 mm and a length of 3 mm, while the area of the base of the cone is 50% of the cross-sectional area of the supporting part.

Example No. 3

2.7 g of a prepreg, consisting of 50% copolymer of vnylpyrrolidone with methyl methacrylate, 29% nylon fiber, 16% aramid fiber thirlon and 5% calcium gluconate are placed in a mold and, at a temperature of 190 ° C, an implant is formed with a central supporting part with dimensions: diameter of the circumscribed circle 10 mm, length 40 mm, the pointed part of which is made in the form of a cone with a base diameter of 5 mm and a length of 10 mm, while the base area of the cone is 50% of the cross-sectional area of the supporting part.

Claims (1)

An implant made of synthetic materials for correcting the curvature of the tubular bones, characterized in that it is made of three interconnected parts: the central supporting part in the form of a rod with four stiffeners with geometric dimensions diameter described circumference mm from 4.0 to 10.0 length mm 4.0 to 40.0 and two end parts in the form of a cone or cylinder with a cone at the end, the base plane of which adjoins the central rod and makes up from 20 to 50% of the cross-sectional area of the central rod, with geometric dimensions base diameter, mm from 2.0 to 5.0 length mm from 3.0 to 10.0 moreover, all parts of the implant are made of a copolymer of vinylpyrrolidone with methyl methacrylate, nylon fiber (aramid fiber - theron) and calcium gluconate, in the following ratio, wt.%: Vinylpyrrolidone copolymer with methyl methacrylate 30.0-50.0 Nylon fiber 29.0-39.0 Aramid Fiber Terlon 16.0-22.0 Calcium gluconate 5.0-9.0