JPH0321203Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a canal scope for observing the situation inside the root of a tooth in dental treatment.

Prior Art In dental treatment, treatments such as placing a filling inside the tooth root are performed after cutting, shaping, and cleaning the tooth root. A canal scope (root mirror) is used for this purpose. Conventional canal scopes simply involve inserting a mirror into the oral cavity to view tooth roots, which is extremely difficult to use, and the interior of the tooth root is dark, making it difficult to see clearly.

In view of the above-mentioned circumstances, the applicant first irradiated light into the tooth root and made it possible to insert an objective lens into the tooth root, thereby accurately observing the situation inside the tooth root. He proposed a canal scope that could be used to obtain the desired results.

FIG. 3 is an overall configuration diagram for explaining an example of a canal scope previously proposed by the present applicant. 3 is a root mirror distal end disposed at one end of the mirror shaft cylinder 1; 4 is a thin tube portion provided at the root mirror tip; the diameter of the thin tube portion 4 is is formed to a diameter that allows sufficient insertion into the tooth root. 5 is an objective lens, 6a is a mirror, 6b is a relay lens, 7 is an eyepiece lens, 8 is a light guide, 9
1 is a light source connection plug, and 10 is a coupling ring. When in use, the light guide 8 is connected to the light guide 2 disposed along the lens barrel 1 by the coupling 10, and the light introduced from the light source connection plug 9 is connected to the light guide 2 by the coupling 10. is transmitted through the light guides 8 and 2 and is emitted from the tip of the light guide 2. As described above, the root mirror tip 3 is formed into a thin tube 4 that is sufficiently thin to be inserted into the tooth root, and an objective lens 5 is disposed at the tip. Therefore, when in use, when the thin tube 4 is inserted into the tooth root and light is introduced into the light guide 8 from the light source connection plug 9, light is emitted from the tip of the light guide 2, illuminating the inside of the tooth root, and illuminating the tooth root. The internal image is transmitted to the eyepiece lens 7 through the objective lens 5 and the relay lens 6b, allowing accurate observation of the inside of the tooth root. As the light guide 2, for example, an optical fiber bundle is used, and the optical fiber bundle is unbundled in the vicinity of the thin tube 4, and arranged approximately evenly around the outer circumference of the thin tube 4, so that the light is emitted from the light emitting end. The light emitted from the light emitting end may be emitted without passing through the objective lens 5, or the light emitted from the light emitting end may be emitted through the objective lens 5 by disposing them approximately evenly on the inner circumference of the thin tube 4. There is.

However, in the above canal scope, a mechanism for adjusting the amount of light introduced into the light guide 2 is located on the light source side (not shown), and the amount of light emitted from the light source on the light source side is changed.
Alternatively, since the adjustment is made by changing the amount of light introduced into the light guide 8, it is very difficult to adjust the amount of light to the optimal amount while observing the inside of the tooth root with a canal scope. Generally, it was necessary to interrupt the observation and adjust the light intensity.

Purpose The present invention was made in view of the above-mentioned circumstances, and in particular, it was made with the purpose of making it possible to adjust the amount of light illuminating the inside of the tooth root while observing the inside of the tooth root.

Configuration Figure 1 is an overall configuration diagram for explaining an embodiment of the canal scope according to the present invention. The same reference numbers as in the figures are provided. Therefore, in the conventional canal scope shown in FIG. It is designed to adjust the amount of light emitted. FIG. 2 is a diagram showing the relationship between the light guide 8, the diaphragm mechanism 11, and the light guide 2. The light guide 8 is composed of, for example, a large number of optical fibers 8' bundled together as shown in the figure. and
An aperture mechanism 11 is provided between them. This aperture mechanism 11 includes, for example, shutter blades 11a, 1
1b and 11c, and by changing the openings, the opening area S at the center can be arbitrarily adjusted. Therefore, when the aperture area is set to the maximum S as shown in Figure 2a, light is transmitted to all optical fibers, and the aperture area becomes as shown in Figure 2b.
When S' is selected, only the light corresponding to the opening area S' is transmitted to the optical fiber on the light guide 2 side.

Effects As is clear from the above explanation, according to the present invention, the inside of the tooth root can be observed while adjusting the amount of light illuminating the inside of the tooth root using the aperture mechanism that is integrally attached to the canal scope. Therefore, it is possible to provide a canal scope that has very good operability and can easily obtain the optimum amount of illumination light.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram for explaining an embodiment of a canal scope according to the present invention, and FIG.
A diagram showing the aperture mechanism 11 shown in FIG. 1, and FIG. 3 are overall configuration diagrams showing an example of a canal scope previously proposed by the applicant. DESCRIPTION OF SYMBOLS 1... Mirror shaft cylinder, 2... Light guide, 3... Root mirror tip, 5... Objective lens, 6a... Mirror, 6
b...Relay lens, 7...Eyepiece lens, 8...
Light guide, 9... Light source connection plug, 10... Coupling, 11... Aperture mechanism.

Claims (1)

[Scope of utility model registration request] a lens barrel, an objective lens provided at one end of the lens barrel, an eyepiece provided at the other end of the lens barrel, and for transmitting an image of the objective lens to the eyepiece. a relay lens, and a light guide disposed along the lens barrel, the light guide having one end into which light transmitted through another light guide is introduced, and the light being emitted from the other end. a manual for adjusting the amount of light introduced into the light guide in a canal scope configured to provide light emitted from the light emitting end of the light guide to illuminate a tooth root; A canal scope, characterized in that a light amount adjustment mechanism is integrally provided in the canal scope main body at a connecting portion between the light guide and the other light guide.