JP2008067981A - Light shielding device for dental treatment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shielding device for dental treatment, with which a burden on the eyeballs is reduced by shielding light for the dental treatment and an affected part can be confirmed by improving a visual field momentarily without large action. <P>SOLUTION: The shielding device for dental treatment includes a light shielding board 10 obtained by laminating transparent resin layers on both sides of a louver layer where transparent zones and light shielded zones are arranged alternately, and a grasping bar 20 attached to the light shielding board 10. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a light-shielding device for dental treatment.

Conventionally, in the treatment of teeth such as caries, it has been the mainstream to pack metal in the carved parts. Although the metal is durable and suitable for the environment in the oral cavity, it is noticeable and feels resistance compared to the surrounding teeth. In recent years, there has been a demand for aesthetics and durability of tooth fillings, and tooth restoration using a composite resin has been developed.
A composite resin is a cured resin having a tooth color that hardens when exposed to light, and is based on a polyfunctional monomer and is filled with a filler such as zirconia or silica in the resin (resin). The restoration method using the composite resin has been expanded from the front teeth to the molars, and can be applied to large cavities, enabling aesthetic restoration close to natural teeth. In addition, the physical strength could be increased by using several kinds of fillers having different particle sizes.

Also, the light used in the repair procedure usually requires intense radiation in the blue region. Therefore, a compact light emission source that emits blue light and is easy to operate in the oral cavity has been proposed (for example, see Patent Document 1).
In addition, a parallel light head for dental treatment that can irradiate light in a parallel state with a uniform light quantity at the center and the outer periphery has been developed.

These dental treatment devices often use a blue light emitting diode in the visible light region as a light source. However, since the light emitted from this light source is very dazzling, it is difficult to see the affected part and treatment is difficult, and the burden on the eyeball is also large.
Therefore, medical aids such as laser light absorption glasses and protective plates that can absorb visible light and reduce the burden on the eyeball have been developed. Since these medical aids absorb blue light and are gentle to the eyeball, there are many materials made of orange having a complementary color relationship.
JP-T-2004-506611

  However, since the orange color of medical aids looks assimilated in the oral cavity, it is difficult to distinguish between the filling (resin) and the natural teeth, and the affected part may be difficult to see especially when bleeding. Therefore, when irradiating the affected area with light, the above-mentioned glasses are put on, or the plate is moved so as to be within the field of view, and when checking the state of the affected area, the glasses are removed, or the plate is moved out of the field of view. A large amount of movement was required, and it was a burden for doctors who performed precise work.

  The present invention has been made in view of the above circumstances, and reduces the burden on the eyeball by shielding the light for dental treatment, and can improve the visual field instantly without involving a large operation and can confirm the affected part. An object is to provide a light-shielding device for treatment.

In order to solve the above problems, the light-shielding device for dental treatment of the present invention is a light-shielding plate in which a transparent resin layer is laminated on both sides of a louver layer in which light transmission bands and light-shielding bands are alternately arranged, And a gripping bar attached to the light shielding plate.
Here, it is preferable that a second louver layer is provided on the louver layer, and the length directions of the light shielding bands arranged in the two louver layers are orthogonal to each other.
Further, it is preferable that the gripping rod is attached perpendicular to the thickness direction of the light shielding plate.
Furthermore, it is preferable that an index of a viewing angle of the light shielding plate is provided on the grip bar.
Further, the index is two bar-shaped indexes protruding from the side surface of the gripping bar, the angle formed by the two bar-shaped indexes is 30 to 150 °, and the main part of the light shielding plate It is preferable to project from the gripping bar at an angle of 15 to 75 ° with respect to the surface.

  According to the present invention, there is provided a light-shielding device for dental treatment that can reduce the burden on the eyeball by shielding light for dental treatment, improve the field of view instantaneously without involving a large movement, and confirm the affected part. it can.

Hereinafter, the present invention will be described in detail.
FIG. 1 is a perspective view illustrating an embodiment of a light-shielding device for dental treatment according to the present invention (hereinafter sometimes referred to as “light-shielding device”), and FIG. 2 is taken along the line AA ′ of FIG. It is sectional drawing. The AA ′ direction is the vertical direction of the light shielding device 1, and the BB ′ direction is the left and right direction of the light shielding device 1. Moreover, FIGS. 3-7 is a perspective view which shows another example of the light-shielding fixture 1 of this invention.
The light shielding device 1 according to the present embodiment includes a light shielding plate (hereinafter also referred to as “light shielding plate”) 10 and a gripping rod 20 in which a louver layer and two transparent resin layers are laminated.

[Shading plate]
FIG. 8 is an exploded perspective view showing an exploded embodiment of the light shielding plate 10 constituting the light shielding device 1 of the present invention. The drawing schematically shows an enlarged part of the light shielding plate 10.
In the light shielding plate 10 of this embodiment, the first transparent resin layer 12 is laminated and integrated on one surface of the louver layer 11 in which the light transmission bands 11a and the light shielding bands 11b are alternately arranged. The second transparent resin layer 13 is laminated and integrated on the other surface. The light shielding plate 10 preferably has a second louver layer 14 laminated on the louver layer.
Hereinafter, the thickness direction of the louver layer 11 is defined as a Z direction, and two directions perpendicular to each other in a plane perpendicular to the Z direction are defined as an X direction and a Y direction, respectively.
The overall planar shape of the light shielding plate 10 in the XY plane (a plane perpendicular to the Z direction) is, for example, a rectangle, but can be appropriately changed according to the shape of the display screen to be applied.

(Louvre layer)
The light transmission band 11a and the light shielding band 11b constituting the louver layer 11 are both strips extending in the X direction, and a plurality of light transmission bands 11a and a plurality of light shielding bands 11b are alternately arranged in the Y direction. . The widths of the plurality of light transmission bands 11a in the Y direction are uniform and constant in the X direction. Further, the widths of the plurality of light shielding bands 11b in the Y direction are also uniform and constant in the X direction.
In the louver layer 11, the angle α2 formed between the surface of the louver layer 11 and the light shielding band 11b is approximately 90 ° (greater than 85 ° and smaller than 95 °), and preferably 90 °.

As the material of the light transmission band 11a, a highly transparent resin is used. Specifically, a resin having high transparency such that only the light transmission band 11a has a light transmittance of 75% or more, preferably 85% or more when light is transmitted in the Z direction in the figure. Material is preferred. For example, highly transparent thermoplastic resins and thermosetting resins are used. Specific examples include cellulose resins, polyolefin resins, polyester resins, silicone resins, polystyrene resins, polyvinyl chloride resins, acrylic resins, polycarbonates. Examples thereof include resins. Of these, silicone resins are preferred, and silicone rubber is particularly preferred from the viewpoint of heat resistance.
Note that the value of “light transmittance” in this specification is D ₆₅ defined in JIS Z 8720 as a light source, and in the apparatus for measuring the intensity of inspection light emitted from the light source with a light receiving sensor, the inspection light is used. The output value of the light receiving sensor when there is no object to be measured on the optical path is set to A, the object to be measured is set on the optical path of the inspection light, and the transmitted light transmitted through the object to be measured is received by the light receiving sensor. When the output value of B is B, the light transmittance = (B / A) × 100 (unit:%).

As the material of the light-shielding band 11b, a colored resin obtained by using the above-described resin as the material of the light-transmitting band 11a as a base material and adding a colorant such as a pigment or a dye thereto is suitably used. The color tone of the light-shielding band 11b only needs to provide a preferable light-shielding property in the light-shielding band 11b, and can be, for example, black, red, white, yellow, green, blue, and light blue. The color tone of the shading band 11b can be adjusted by the type and amount of the colorant. Specifically, the light shielding property is such that the light transmittance when only light is transmitted in the width direction (Y direction in the drawing) of the light shielding band 11b is 40% or less, preferably 10% or less. It is preferable to have. Moreover, since the color tone of the light-shielding band 11b constitutes the color tone recognized when the louver layer 11 is viewed, it is preferable to design in consideration of decorativeness.
Specific examples of the colorant include general organic pigments or inorganic pigments such as carbon black, benkara, iron oxide, titanium oxide, yellow iron oxide, disazo yellow, and phthalocyanine blue. One colorant may be used, or two or more colorants may be used. Moreover, when not using a black pigment, it is preferable to use a white pigment together in order to obtain favorable light-shielding property.
In the louver layer 11, the resin material forming the light transmission band 11a and the resin material as the base material of the light shielding band 11b may be the same or different, but the light transmission band 11a and the light shielding band It is preferable that both are the same from the point of adhesiveness with 11b.

FIG. 9 is a cross-sectional view of the louver layer 11 taken along the YZ plane. In the louver layer 11, the viewing angle θ in the YZ plane (the paper surface in FIG. 9) corresponds to the viewing angle in the left-right direction when the light shielding plate 10 is applied to the light shielding device 1, and the Z direction of the light transmission band 11a. And the width in the Y direction. Further, the ratio of the width of the light transmission band 11a and the width of the light shielding band 11b in the Y direction affects the transmittance of light rays parallel to the Z direction.
Specifically, the viewing angle θ in the louver layer 11 is preferably in the range of 30 to 150 °, more preferably 60 to 120 °.
The thickness T in the Z direction of the light transmission band 11a is preferably about 0.1 to 2.5 mm, and more preferably about 0.14 to 0.4 mm.
The width W1 in the Y direction of the light transmission band 11a is preferably in the range of 50 μm to 0.3 mm, and more preferably in the range of 75 μm to 0.2 mm.
The width W2 in the Y direction of the light shielding band 11b is preferably in the range of 5 μm to 50 μm, and more preferably in the range of 15 μm to 30 μm.
The thickness T in the Z direction of the light shielding band 11b is the same as the thickness T of the light transmission band 11a.

The louver layer 11 having such a configuration can be manufactured as follows. First, a plurality of sheets of the first sheet made of the constituent material of the light transmission band 11a and having the thickness W1 and a plurality of sheets of the second sheet made of the constituent material of the light shielding band 11b and having the thickness of the above W2. Are alternately laminated, and heated and pressed to form a block body in which the plurality of sheets are integrated.
Next, the louver layer 10 is obtained by slicing the block body along a cut surface perpendicular to the sheet surface. The thickness (slice width) when slicing is the above T.

(Second louver layer)
In the second louver layer 14, light transmission bands 14a and light shielding bands 14b are alternately arranged in the X direction.
The second louver layer 14 differs greatly from the louver layer 11 in that the light transmission band 11a and the light shielding band 11b in the louver layer 11 are both strips extending in the X direction, whereas the second louver layer 14 The light transmission band 14a and the light-shielding band 14b in FIG. That is, the length direction (X direction) of the light shielding band 11b of the louver layer 11 and the length direction (Y direction) of the light shielding band 14b of the second louver layer 14 are orthogonal to each other. In the second louver layer 14, the angle α3 formed by the surface of the second louver layer 14 and the light shielding band 14b is approximately 90 ° (greater than 85 ° and smaller than 95 °) and 90 °. Is preferred.

The materials of the light transmission band 14a and the light shielding band 14b in the second louver layer 14 are the same as those of the light transmission band 11a and the light shielding band 11b in the louver layer 11.
The widths of the light transmission band 14a and the light shielding band 14b in the second louver layer 14 are the same as the width W1 of the light transmission band 11a and the width W2 of the light shielding band 11b in the louver layer 11, respectively.
Further, the thickness of the second louver layer 14 in the Z direction is preferably in the same range as the thickness T of the louver layer 11 in the Z direction, and the thickness T1 of the louver layer 11 and the thickness of the second louver layer 14 are different. It may be the same or different.

  For manufacturing the second louver layer 14 having such a configuration, the same block body (sheet laminate) as used for manufacturing the louver layer 11 can be used.

The method for integrating the louver layer 11 and the second louver layer 14 is not particularly limited, and a known method can be used as appropriate.
For example, a method of adhering both using an adhesive having transparency after curing is preferable. Examples of such adhesives include thermosetting adhesives that are transparent after curing, multi-component reaction adhesives, UV curable adhesives, and the like. Specifically, epoxy adhesives, urethane adhesives, acrylics, etc. A system adhesive, a melamine adhesive, a polyester adhesive, a silicone adhesive, and the like can be suitably used.
Note that the order of stacking the louver layer 11 and the second louver layer 14 in this embodiment may be reversed.

In the present embodiment, the light transmission band 11a and the light shielding band 11b of the louver layer 11 extend in parallel to the X direction, and the light transmission band 14a and the light shielding band 14b of the second louver layer 14 extend in parallel to the Y direction. ing. That is, the angle formed by the length direction of the light shielding band 11b of the louver layer 11 and the length direction of the light shielding band 14b of the second louver layer 14 is 90 °, but this angle is not necessarily 90 °. The allowable range is 90 ° ± 15 ° (75 to 105 °). Particularly preferred is 90 °.
That is, in the present invention, “the length directions of the light shielding bands arranged in the two louver layers are orthogonal to each other” means that the light shielding band 1ab of the louver layer 11 is lighted and the second louver layer 14 is shielded. This means that the angle with the length direction of the band 14b is in the range of 90 ° ± 15 ° (75 to 105 °), and a particularly preferred angle is 90 °.

(First and second transparent resin layers)
The first transparent resin layer 12 and the second transparent resin layer 13 serve to protect the louver layer. As materials for these transparent resin layers, the resins listed above as materials for the transmission band 11a of the louver layer 11 can be used. From the viewpoint of transparency, the light transmittance when light is transmitted in the Z direction in the figure for each of the first transparent resin layer 12 and the second transparent resin layer 13 is 75% or more. It is preferable that it is 85% or more.
The materials of the first transparent resin layer 12 and the second transparent resin layer 13 are polycarbonate resin, polyester resin, acrylic resin, polyolefin resin (particularly, cycloolefin polymer), particularly in terms of transparency and heat resistance. Cellulosic resins are preferred, with polycarbonate and polyester resins being more preferred.
If the thickness in the Z direction of the first transparent resin layer 12 and the second transparent resin layer 13 is too thin, a sufficient protective function cannot be obtained, and the light transmittance decreases as the thickness increases. About 0.5 mm is preferable, and about 0.1-0.2 mm is more preferable.
In addition, the 1st transparent resin layer 12 and the 2nd transparent resin layer 13 may consist of the same material, and may consist of a mutually different material. Moreover, both thickness may be the same or different.

The method of integrating the layer in which the louver layer 11 and the second louver layer 12 are integrated and the first transparent resin layer 12 and the second transparent resin layer 13 are not particularly limited, and a known method is appropriately selected. Can be used.
For example, an adhesive is applied to the surface of the layer in which the louver layer 11 and the second louver layer 12 are integrated, and a sheet made of the material of the first transparent resin layer 12 and the second transparent resin layer 13 is bonded together. Thereafter, a method of curing the adhesive may be used. The adhesive used at this time preferably has a high light transmittance after curing. Specifically, it is preferable that the light transmittance of the cured adhesive layer alone is 65% or more, and more preferably 80% or more.
Examples of such an adhesive include a thermosetting adhesive having a transparency after curing, a multi-component reaction adhesive, an ultraviolet curable adhesive, and the like. Specifically, an epoxy adhesive, a urethane adhesive, An acrylic adhesive, a melamine adhesive, a polyester adhesive, a silicone adhesive, and the like can be suitably used.

The light transmittance of the entire light shielding plate 10 is preferably 45% or more, and more preferably 55% or more. The upper limit of the light transmittance is preferably higher, but about 80% is the limit for achieving the function of the present invention.
In addition, the light transmittance of the light-shielding plate 10 in the light-shielding device 1 shown in FIG. 1 is 77%.

(Other)
An antireflection agent may be applied as an anti-gray treatment on one surface or both surfaces of the light shielding plate 10. Examples of the antireflection agent include resin ink containing a filler. Examples of the resin include an acrylic resin, a silicone resin, and a fluorine resin, and among them, an acrylic resin is preferable. Examples of the filler include silica powder (silicon dioxide powder), acrylic resin filler, and the like, and silica powder is particularly preferable. The shape of the filler includes a spherical shape, a powder shape, a flake shape, a ship shape, and an indeterminate shape, but is not particularly limited in the present invention. The anti-gray treatment is desirable because it can prevent reflection of room lights or the like on the light shielding plate 10 when used as the light shielding device 1.

[Grip stick]
Although it does not restrict | limit especially as a material of the grip rod 20 which comprises the light-shielding device 1 of this invention, For example, a metal, resin, wood, etc. are mentioned. Among these, a resin is preferable from the viewpoint of light weight and strength. In addition, the shape may be a round bar or a polygonal bar such as a triangle, a square, or a pentagon, but a round bar is preferable in consideration of ease of gripping. Furthermore, unevenness may be provided on the surface of the gripping rod 20.
The length of the gripping rod 20 is preferably 5 to 50 cm, and more preferably 10 to 20 cm. Further, the width is preferably 1 to 5 cm, more preferably 1.5 to 3 cm.
Note that the gripping rod 20 may be linear or bent halfway.

The grip bar 20 may be attached to any part of the light shielding plate 10, but considering the ease of use when the light shielding device 1 is used, it is attached perpendicular to the thickness direction (Z direction) of the light shielding plate 10. Is preferred. Moreover, it is preferable to attach to the peripheral part of the light-shielding plate 10. Furthermore, as shown in FIG. 2, it is preferable that the angle α1 formed by the gripping bar 20 and the light shielding plate 10 is 180 °, but the angle α1 may be other than 180 °.
In addition, it is desirable to attach the gripping bar 20 to the light shielding plate 10 so as to be parallel to the length direction of the light shielding band 11b arranged in the louver layer 11.

  The method of attaching the gripping rod 20 to the light shielding plate 10 is not particularly limited. For example, a method is provided in which a notch is provided at one end of the gripping rod 20 and the light shielding plate 10 is inserted into the notch. The method of wearing is mentioned.

The gripping rod 20 is preferably provided with an indicator 30 for the viewing angle θ of the light shielding plate 10 on the side surface. Although it does not restrict | limit especially as the parameter | index 30, For example, the rod-shaped parameter | index 31 as shown to FIGS. 3-7, the fan-shaped parameter | index 32, the reverse cone-shaped parameter | index 33, the spherical parameter | index 34b provided with the label or the embedding part 34a, For example, a label provided directly on the side surface of the gripping bar 20 or an index 35 of the embedded portion may be used. Of these, the bar-shaped index 31 is preferable.
Note that the “index” in the present invention is a mark of the viewing angle θ.

Here, the bar-shaped index 31 will be described. Note that two bar-shaped indexes 31 are used as one set.
The material of the bar-shaped index 31 is not particularly limited, and examples thereof include metal, resin, and wood. Among these, a resin is preferable from the viewpoint of light weight and strength. In addition, the shape may be a round bar or a polygonal bar such as a triangle, square, or pentagon.
Furthermore, the length of the bar-shaped index 21a is preferably 1 to 10 cm, and more preferably 2 to 7 cm. Further, the width is preferably 0.3 to 1 cm, and more preferably 0.5 to 0.8 cm.

The bar-shaped index 31 is preferably provided so as to protrude from the side surface of the gripping bar 20. Further, it is preferable that the two bar-shaped indexes 31 protrude from the side surface of the gripping bar 20 at an angle of 15 to 75 ° with respect to the main surface of the light shielding plate 10, and more preferably 25 to 65 °. Particularly preferred is 45-60 °. Moreover, it is preferable to project from the side surface of the gripping bar 20 so that the two bar-shaped indicators 31 form an angle of 30 to 150 °, more preferably 40 to 120 °, and particularly preferably 45 to 90. °. The angle formed by the two bar-shaped indexes 31 depends on the viewing angle θ in the louver layer 11.
Further, as shown in FIG. 3, it is desirable that the two sets of bar-shaped indexes 31 protrude from the side surface of the gripping bar 20 on both sides around the light shielding plate 10.

By using two bar-shaped indicators 31 projecting from the side surface of the gripping bar 20 at an angle within the above range, a third party other than the user (the person who actually performs dental treatment) is used as the light-shielding device 1. It becomes a standard of the visual recognition range when (person who assists treatment) has. Therefore, it is desirable because it is easy to adjust the user's field of view within and outside the viewing angle θ in the louver layer 11.
Further, the bar-shaped index 31 is preferably projected from the side surface of 0.5 to 5 cm from the portion where the grip bar 20 is attached to the light shielding plate 10, and more preferably 1 to 3 cm.
Here, the main surface of the light shielding plate 10 is a surface perpendicular to the thickness direction of the light shielding plate 10.

As shown in FIG. 1, the light shielding device 1 for dental treatment of the present invention includes the light shielding plate 10 and the gripping rod 20 as described above. When irradiating the oral cavity with light for dental treatment, the light can be blocked by simply rotating the light blocking device 1 in the CC ′ direction so that the field of view is out of the viewing angle θ in the louver layer 11. The light shielding device 1 can be rotated by grasping the gripping bar 20 by hand and turning the gripping bar 20 in the circumferential direction. In addition, the affected part in the oral cavity can be confirmed instantaneously by simply rotating the light shielding device 1 in the CC ′ direction again so that the field of view falls within the viewing angle θ.
In this way, the eyeball can be protected from light and the field of view can be improved with only a small movement such as slightly moving the wrist without a large movement.

In addition, by laminating the second louver layer 14 on the louver layer 11, even if the light shielding device 1 is moved to sleep or wake up, it is possible to instantaneously shield the light or confirm the affected part. is there.
Furthermore, since the grip bar 20 has the index 30 that serves as a guide for the viewing range, even when a third party has the light-shielding device 1, the user's field of view can be easily adjusted to the inside and outside of the viewing angle θ. Therefore, it is preferable.

It is a perspective view explaining an example of the light-shielding instrument for dental treatment of this invention. It is sectional drawing which follows the A-A 'line of FIG. It is a perspective view which shows another example of the light-shielding instrument for dental treatment of this invention. It is a perspective view which shows another example of the light-shielding instrument for dental treatment of this invention. It is a perspective view which shows another example of the light-shielding instrument for dental treatment of this invention. It is a perspective view which shows another example of the light-shielding instrument for dental treatment of this invention. It is a perspective view which shows another example of the light-shielding instrument for dental treatment of this invention. It is a disassembled perspective view which shows embodiment of the light-shielding plate used for this invention. It is sectional drawing in the YZ plane of FIG.

Explanation of symbols

  1: light shielding device, 10: light shielding plate, 11: louver layer, 11a: light transmission band, 11b: light shielding band, 12: first transparent resin layer, 13: second transparent resin layer, 14: second louver Layer, 14a: light transmission band, 14b: light shielding band, 20: gripping bar, 30: index

Claims (5)

  A dentistry comprising: a light shielding plate having a transparent resin layer laminated on both sides of a louver layer in which light transmission bands and light shielding bands are alternately arranged; and a gripping rod attached to the light shielding plate. A shading device for treatment.   2. The dental treatment according to claim 1, wherein a second louver layer is provided on the louver layer, and length directions of light shielding bands arranged in the two louver layers are orthogonal to each other. Shading fixtures.   The light-shielding device for dental treatment according to claim 1 or 2, wherein the gripping rod is attached perpendicular to the thickness direction of the light-shielding plate.   The light-shielding device for dental treatment according to any one of claims 1 to 3, wherein the grasping bar is provided with an index of a viewing angle of the light-shielding plate. The indicator is two rod-like indicators protruding from the side surface of the gripping rod, the angle formed by the two rod-like indicators is 30 to 150 °, and the main surface of the light shielding plate The light-shielding device for dental treatment according to claim 4, wherein the light-shielding device is protruded from the gripping bar at an angle of 15 to 75 °.

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