PL201199B1 - Facial skeletin bone defect prosthesis in particular that of orbital bone - Google Patents

Abstract

1. A prosthesis for a defect of the facial bones, especially the orbital bones, made of a bone substitute material, characterized in that it consists of rectangular knitted fabric flakes and pins (3) made of textured polypropylene yarn of No. 110 dtex, the core (4) of which is a polyester yarn of No. 56 dtex.

Description

(12) PATENT DESCRIPTION (19) PL (11) 201199 (13) B1 ( ²¹ ) Application number: 35 ⁰¹¹ 4 (51 ⁾

A61F 2/02 (2006.01) A61F 2/28 (2006.01) A61L 27/00 (2006.01) ⁽²²⁾ Filing ^{date : 15 10 2001} _A61L -7-/144 (20i.O1) (54)

Prosthesis for craniofacial bone defects, especially orbital bones

(73) Patent holder: (43) The application was announced: TRICOMED SA, Lodz, Poland 22/04/2003 BUP 08/03 (72) Inventor(s): Piotr Arkuszewski, Lodz, PL (45) The patent was granted on: 31/03/2009 WUP 03/09 Krystyna Lesiakowska, Lodz, PL Eugeniusz Przyborowski, Lodz, PL Tomasz Gąsiorowski, Zgierz, PL

(57) 1. A prosthesis for a defect of the facial bones, especially the orbital bones, made of a bone substitute material, characterized in that it consists of rectangular knitted fabric flakes and pins (3) made of textured polypropylene yarn of No. 110 dtex, the core (4) of which is a polyester yarn of No. 56 dtex.

199 B1

PL 201 199 B1

Description of the invention

The subject of the invention is a prosthesis for a defect of the facial bones, especially the orbital bones, intended for the surgical treatment of fractures of the middle part of the facial skull.

Natural and synthetic bone substitutes are used for prosthetic replacements for craniofacial bone defects. Natural bone substitutes include hydroxyapatite from bovine and coral bone, decalcified human cadaver bone, collagen obtained from bovine bone, or bovine bone preparations with a compact or spongy consistency. Successful healing is practically achieved only with endogenous materials, i.e., grafts. Grafts require at least one additional surgical procedure, which entails an additional healing process at the donor site. Synthetic substitutes include the most common biologically active glass, silicone, water glass, or porous alumina ceramics.

Ceramic implant materials consisting of porous hydroxyapatite and additionally containing organic copolymers are known from Polish patent description No. 154957. A bone substitute material also known from Polish patent description No. 172728 contains a biologically active compound in a porous matrix in ^the form ^of a polypeptide acting as a recombinant alkaline growth ^{factor ( AGF} ) in an amount of ^10'9 -W3 ^gp oN ^{peptide per 1 cm3} of ^matrix . ^{It is advantageous when the} matrix is a mineral matrix based on calcium minerals.

The proposed prosthesis for a craniofacial bone defect, particularly the orbital bone, is characterized by rectangular knitted fabric panels and pins made of 110 dtex textured polypropylene yarn. The pin core is made of 56 dtex polyester yarn. The knitted fabric panels may have an open "U" cross-section and are made of 110 dtex textured polypropylene yarn in a single-ply left-right weave. These panels are coated with a medical-grade polyurethane film.

The craniofacial bone defect prosthesis presented in the invention description has good biological activity, enabling good bonding with autogenous material. It is mechanically durable and easily adapts to the shape of the defect thanks to the use of pins. It easily integrates into the surrounding tissue, ensuring easy healing of postoperative scars.

The invention is illustrated in an example embodiment in the drawing, which shows a general view of the prosthesis. Prosthesis 1 is a 2 x 4 cm knitted patch made of 110 dtex f 33 x 2 textured polypropylene yarn with a single-bearing left-right weave. After thermal stabilization in a 36 mm diameter circular mold in an oven at 180-185°C for 15-20 minutes, it takes on a semicircular shape, with a cross-section in the shape of an obtuse "U." The knitted fabric is coated with a medical-grade polyurethane film 2. Prosthesis 1 consists of pins 3 made of polypropylene yarn no. 110 dtex f 33 x 2, the core 4 of which is polyester yarn no. 56 dtex f 24. The length of the pins 3, whose sharp ends are embedded, ranges from 1 to 1.5 cm. The entire prosthesis 1, together with the pins 3, is cleaned and packaged for sterilization. The application of prosthesis 1 involves placing the already formed prosthesis on the floor of the orbit during the implantation procedure, and then securing it with two pins 3.

Claims (2)

its already shaped figure at the bottom of the eye socket, and then it is attached with two pins 3. Patent claims 1. The prosthesis of the defect of the craniofacial bones, especially the orbital bones, made of bone substitute material, characterized by the fact that it is made of rectangular knitted petals and pins (3) made of textured polypropylene yarn of No. 110 dtex, whose core (4) is polyester yarn of No. 56 dtex. 2. The craniofacial defect prosthesis according to claim The fabric according to claim 1, characterized in that the knitted flakes have an obtuse "U" shape in cross-section and are made of a 110 dtex textured polypropylene yarn with a left-right single jersey weave and are covered with a medical grade polyurethane film (2).