RU2286081C1 - Dental fluorescent video camera - Google Patents

Abstract

FIELD: medical equipment.

SUBSTANCE: dental video camera for fluorescent inspection has case with handle and TV camera disposed inside the handle. Camera additionally has fluorescent light-emitting diodes and filter mounted onto camera's objective.

EFFECT: improved quality of inspection.

2 dwg

Description

The present invention relates to medical equipment, and in particular to equipment for the implementation of fluorescence diagnosis of diseases of the oral cavity, in particular areas with pathogenic microflora.

A device for visual inspection and therapy of the oral cavity (US patent No. 5,051,823 from 09.24.1991, A 61 B 001/04; A 61 B 001/06), consisting of a handle and an overview part. The inspection part includes a tip connected to the handle by means of a jumper. At the tip is the matrix of the camcorder, the lens and the optical fiber of the laser. The light source can be located both in the tip and in the jumper or handle. The main disadvantage of this device is that a laser is required for its operation, which increases its dimensions and complicates the work of a doctor.

Closest to the claimed is a device for visual inspection of the oral cavity (S-6 Satellite Scope http://www.rfsystem.co.jp/rfsytemlab_usa/veterinary_image/dp6ver2.html).

The housing consists of a handle and an observation part. The grip contains a television camera, the receiving matrix and lens of which are placed at the peripheral end of the viewing part. Around the matrix of the camera are LEDs emitting in the entire range of the visible spectrum. This device does not have the disadvantage inherent in the device for visual examination and therapy of the oral cavity, however, it is impossible to carry out fluorescence diagnosis of diseases of the oral cavity with its help. Without the help of fluorescence diagnostics, it is very difficult to identify diseases of periodontal tissues and hard tooth tissues in the early stages, as well as processes that occur under the surface layer of tissues.

Recent studies of fluorescence images of oral diseases show the feasibility of using the fluorescence method in dentistry.

The present invention solves the problem of creating a portable device that allows the diagnosis of diseases of the oral cavity in both natural and fluorescent light. This allows you to improve the quality of diagnosis by recording the fluorescence of pathologies that are not visible in ordinary light.

The technical result is achieved by the fact that in the device, the housing of which consists of a handle and an observation part, a television camera is placed in the handle, the receiving matrix and lens of which are placed at the peripheral end of the observation part, where the lighting LEDs are located, additionally, fluorescent LEDs and a filter are installed on the television lens cameras.

The design of the device is illustrated in the drawing (figure 1), which schematically shows the proposed device, where

1 - housing handle;

2 - a survey part of the body;

3 - television camera;

4 - receiving matrix of a television camera;

5 - lens;

6 - lighting LEDs;

7 - fluorescent LEDs;

8 - filter.

Fluorescence diagnostics is based on the detection of fluorescence, which occurs either naturally due to fluorescent substances that are part of the tissues (autofluorescence), or due to the patient's photosensitizer. The concentration of fluorescent substances in pathological tissues is much greater than in healthy ones. Irradiation of the pathological area with radiation absorbed by such substances leads to their fluorescence.

The proposed device operates as follows.

When conducting diagnostics in natural light, the radiation of the light-emitting diodes 6 falls on the examined surface, reflected light through the lens 5 is recorded by the receiving matrix 4 of the television camera 3.

When conducting fluorescence diagnostics, the light-emitting diodes 6 are turned off, since they can interfere with the observation of fluorescence, a filter 8 is installed in front of the lens 5. The radiation of the fluorescence LEDs 7 enters the test surface. The light reflected from the surface is blocked by a filter 8, which transmits fluorescent radiation from the tissue. Fluorescence is recorded by the receiving matrix 4 of the television camera 3.

The following is an example of a specific implementation of the proposed device and its operation. The device is an intraoral video camera in which 4 micro-LEDs with radiation at wavelengths of 407 ± 20 nm are additionally installed. The transmission of the filter in the visible range of 430-720 nm is ~ 90%. Switching modes is carried out using the built-in switch.

Using the device, patient A was examined. Figure 2a shows an image of a 46 tooth in natural light. In the image in fluorescence light (Fig.2b), red fluorescence is clearly visible, according to which it is possible to judge the occurrence of a secondary carious process in the filling area.

The device provides high efficiency when conducting fluorescence diagnostics, pathological formations, in particular neoplasms and areas with pathogenic microflora.

Claims (1)

Dental video camera for fluorescence diagnostics, having a housing with a handle and a television camera located in it, characterized in that it additionally contains fluorescent LEDs and a filter on the camera lens.

Images