JP2002291861A - Plaster cast material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a new plaster cast material that can be supported by a base because of lack in surface adhesion, that resultantly eliminates the need for care and can prevent malunion. SOLUTION: A sheet mainly made up of a photocuring resin composition, is covered on a repositioned affected site and becomes a plaster cast by photocuring.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casting material used in orthopedic surgery, and more particularly to a casting material which is a flexible sheet before use and which is cured by light to form a casting. About the material.

[0002]

2. Description of the Related Art As a material for a cast for fixing a fracture site in orthopedic surgery, gypsum has conventionally been generally used.
The plaster cast is not only heavy, but also has a problem that it takes time and effort to perform the treatment. In particular, the surface has adhesiveness until it cures, so it is necessary to work with gloves, and when it comes into contact with other things, it adheres, supporting the affected part during and after treatment with a pedestal etc. And needed assistance from one or more therapists. In addition, the position of the reduction (the position of the good limb) was likely to shift during that time, which caused later deformation and healing.

In recent years, plastic casts have been widely used as an alternative to the plaster casts having many problems.

[0004] A plastic cast is a base fabric made of a knitted fabric such as glass fiber or polyester fiber coated with a composition containing a urethane prepolymer as a main component. Shape (bandage shape). Such a plastic cast is immersed in water and wetted, then wrapped around a reduced diseased part, and cured while maintaining the same state for several minutes.

[0005] Such plastic plasters have solved the problems of the conventional plaster casts to a considerable extent, but since the surface is tacky until it hardens, it is difficult to treat, and the affected part is pedestal or the like. The problem of not being able to support it has not been resolved. Further, those using glass fibers for the base fabric generate glass powder at the time of cutting, and there is no danger of ignition due to friction, and there is a problem in terms of safety.

[0006]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above, and unlike the above-mentioned plaster casts and conventional plastic casts, supports the affected part during and after treatment with a pedestal or the like. As a result, it is an object of the present invention to provide a novel casting material that does not require assistance until the resin is cured and can prevent deformation and healing.

[0007]

A cast material according to claim 1 is a cast material for forming a cast for fixing an affected part, and is a sheet-like material mainly composed of a photocurable resin composition. After covering the affected area, it is cured by light to form a cast.

According to a second aspect of the present invention, in the first aspect, a light-shielding sheet is laminated on a sheet made mainly of a photocurable resin composition.

According to a third aspect, in the first or second aspect, a skin-protecting sheet is laminated on a sheet-like material mainly composed of a photocurable resin composition.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described more specifically with reference to the drawings, but the present invention is not limited thereto.

FIG. 1 is a schematic sectional view showing the structure of a cast material A according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view showing the structure of the cast material A.

As shown in these figures, the casting material A is composed of three layers, the inner layer sheet 10 is a skin protection sheet, the middle layer sheet 20 is a sheet mainly composed of a photocurable resin composition, and the outer layer sheet 30 is a light-shielding sheet. It is a sheet.

As the inner layer sheet 10, a sheet material made of a conventionally used material such as cotton or gauze is used. The thickness is not particularly limited as long as it can achieve the purpose of protecting the skin.
It is about 5 mm.

The inner sheet 10 is not essential in the present invention, and can be omitted when the skin is separately covered with such a protective material.

The middle sheet 20 is mainly made of a photocurable resin composition, has flexibility before curing, can have a desired shape, and is cured by light. Although the form is not particularly limited, examples include (a) a sheet of the resin composition alone; Examples thereof include those adhered by impregnation, and (c) a transparent or translucent hollow fiber filled with a resin composition to form the hollow fiber into a mesh. Although the middle sheet 20 shown in FIG. 2 is an example using (c), a sheet of (a) or (b) can be used instead.

As the base material used in the case (b),
Polyester knitted fabrics and the like used in conventional plastic casts can be used.

In the case of the above (c), the hollow fibers may be formed into a mesh by combining warps and wefts, or may be formed into a mesh by integral molding. By employing such a mesh-like middle layer sheet 20, a cast having air permeability can be obtained.

The thickness of the middle layer sheet 20 is preferably as thin as possible within a range where a sufficient strength can be obtained. The thickness of the middle sheet 20 varies depending on the purpose of use of the cast material (reduction site), but is usually about 1 to 10 mm. .

The above-mentioned photocurable resin composition may be any as long as it is cured within a few minutes by visible light, ultraviolet light or the like, and does not release a component which adversely affects the human body at the time of curing (at the time of treatment) and after curing. More specifically, a monomer, oligomer,
Alternatively, it contains a polymerization initiator, a catalyst, a filler, and other additives as necessary in addition to the polymer or a mixture thereof, and preferably does not contain a solvent.

As the photo-curable resin, various photo-curable resins such as acrylic, urethane and epoxy can be used.
Specific examples of commercially available products include JSR Corporation's Desolite series, Opstar series, Teijin Seiki Co., Ltd.'s TSR series, SCR series (urethane acrylate series), HS series (epoxy series)
Cibatool series (epoxy acrylate or epoxy type), SOMOS ^TM series, and the like.

The outer layer sheet 30 is a light-shielding sheet for preventing the intermediate layer sheet 20 from being hardened by the time the reduction procedure is completed, and is easily peeled off from the intermediate layer sheet 20. .

If the resin used for the middle sheet 20 is not easily cured by natural light (including light from a fluorescent lamp) in the room, the outer sheet 30 can be omitted.
On the other hand, when the resin of the middle layer sheet 20 is rapidly cured by natural light in the room, the surface on the opposite side (the inner layer sheet 10 side) may be protected by a light-shielding sheet or the like in order to prevent curing before use. preferable.

The outer sheet 30 is preferably provided with perforations as shown in FIG. 2 to facilitate cutting and peeling.

The cast material of the present invention is stored in a light-shielding bag or other container, and is taken out of the bag or container immediately before use.

FIG. 3 is a perspective view showing a use state of the casting material of the present invention.

As shown in the figure, the cast material A of the present invention is spread on a pedestal 40 or the like, placed on the affected part (broken limb or the like) and reduced, and then the end portion is indicated by an arrow as shown by an arrow. Lift to cover the affected area. After the coating (while covering the overlapping portions and the like), the light-shielding sheet is peeled off, and if necessary, the film is irradiated with light using a light source such as an ultraviolet lamp and cured to form a cast. When irradiating light, such as ultraviolet rays, which may adversely affect the human body, it is preferable to cover and protect portions other than the cast material with a light-shielding sheet.

[0027]

According to the cast material of the first aspect, the affected part can be supported by the pedestal or the like, and as a result, there is no need for assistance until the cast is hardened, and deformation and healing can be prevented.

According to the second aspect of the present invention, when a resin that cures with natural light is used, it is possible to prevent the resin from curing by the time the reduction procedure ends.

According to the third aspect, there is no need to separately protect the skin with gauze or the like.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing a structure of a cast material A according to one embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a configuration of the casting material A.

FIG. 3 is a perspective view showing a use state of the casting material of the present invention.

[Explanation of symbols]

 A ... cast material 10 ... inner layer sheet (skin protection sheet) 20 ... middle layer sheet (resin composition sheet) 30 ... outer layer sheet (light shielding sheet) 40 ... pedestal

Claims (3)

[Claims] Claims: 1. A cast material for forming a cast for fixing an affected part, which is a sheet-shaped material mainly composed of a photocurable resin composition. A casting material characterized by the following. 2. The cast material according to claim 1, wherein a light-shielding sheet is laminated on the sheet-like material mainly composed of the photocurable resin composition. 3. The cast material according to claim 1, wherein a skin-protecting sheet is laminated on the sheet-like material mainly composed of the photocurable resin composition.