Auxiliary device for tooth colorimetry

Abstract

The auxiliary device comprises a compartment, the rear end of the compartment is connected with a handle, and a window is formed in the top surface of the compartment, so that a colorimetric film can extend into the window conveniently for colorimetric operation; a plurality of illuminating lamps are mounted on the inner wall of the compartment and are used for providing an illuminating light source; a lip blocking plate is arranged on the upper portion of the opening in the front end of the compartment, a gum blocking plate is arranged at the bottom of the lip blocking plate, and a tongue depressor is arranged on the lower portion of the opening in the front end of the compartment. The light interference of the external environment can be isolated by using the closed environment of the compartment, and the required light source is provided only by using the illuminating lamp on the inner wall of the compartment, so that the error of the colorimetric result is reduced; the lip blocking plate is arranged on the upper portion of the opening in the front end of the compartment and used for blocking the lip, the gingiva blocking plate is arranged at the bottom of the lip blocking plate and used for blocking the gingiva, the tongue depressor is matched to block biological tissue in the oral cavity, only teeth are exposed in the compartment, and therefore a completely-isolated colorimetric environment is provided, and the accuracy of the colorimetric result is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an auxiliary device for tooth color comparison. Background Art

[0002] In the field of dental restoration, accurate tooth color matching is the core technical link that determines the function and aesthetic effect of the restoration. The visual colorimetry method currently widely used in clinical practice mainly relies on standard colorimetric plate systems such as VITAClassical. Its technical implementation path can be summarized as follows: when the dental chair light source is turned off, the three elements of brightness, hue and saturation of natural teeth and colorimetric plates are compared through human vision. This technical system has the following inherent defects:

[0003] Ambient light interference mechanism: Although the current ISO / TS28671 standard recommends the use of a 5500K standard light source, multiple interference sources are common in clinical practice. There is a spectral deviation between the inherent lighting system of the dental treatment table (color temperature range 4000-6500K) and the light source designed for the colorimetric plate, and it is difficult to completely shield the ambient stray light, resulting in the color rendering index (CRI) deviating from the theoretical value by more than 15%, which directly affects the accurate mapping of the Munsell color system.

[0004] Physiological color interference effect: The biological tissues of the oral and maxillofacial region constitute a complex optical interference environment. The Munsell chromaticity value of the lip and cheek mucosa (about 5R 5 / 6) produces about 30% diffuse reflection interference, while the dark area of ​​the palatopharynx (brightness value <10cd / m 2 ) forms a visual contrast trap, causing the just noticeable difference (JND) threshold in the Weber-Fechner law to rise by 2.5 times. Clinical data show that such interference can increase the colorimetric error rate by 42%-57%.

[0005] In summary, existing tooth color comparison tools often cannot provide an environment that is completely isolated from interference, resulting in inconsistencies and errors in color comparison results; the above defects have caused the poor color matching rate of restorations to remain at 31%-45% for a long time, becoming a key technical bottleneck restricting the development of dentistry. Summary of the invention

[0006] The present invention provides an auxiliary device for tooth color comparison, which solves the problem that tooth color comparison tools in the prior art cannot provide an environment completely isolated from interference, resulting in inaccurate color comparison results.

[0007] The technical solution of the present invention is achieved in this way:

[0008] The present invention provides an auxiliary device for tooth color comparison, comprising a compartment, a handle is connected to the rear end of the compartment, a window is provided on the top surface of the compartment to facilitate the insertion of a colorimetric sheet for color comparison; a plurality of lighting lamps are installed on the inner wall of the compartment to provide a lighting source; a lip guard is provided on the upper part of the front end opening of the compartment, a gum guard is provided on the bottom of the lip guard, and a tongue depressor is provided on the lower part of the front end opening of the compartment.

[0009] The present invention utilizes the closed environment of the compartment to isolate the light interference of the external environment, and only uses the lighting lamp on the inner wall of the compartment to provide the required light source, thereby reducing the error of the colorimetric result; by arranging a lip guard plate at the upper part of the front end opening of the compartment to cover the lips, and arranging a gum guard plate at the bottom of the lip guard plate to cover the gums, and then cooperating with a tongue depressor to cover the biological tissue inside the oral cavity, only the teeth are exposed in the compartment, thereby providing a completely isolated colorimetric environment, and further improving the accuracy of the colorimetric result.

[0010] Preferably, there are two compartments, which are respectively installed at the front and rear ends of the handle; the inner walls of the two compartments are painted with a gray background and a black background, respectively, the gray background is used to compare the three elements of tooth color, and the black background is used to compare the transparency of teeth; by setting two compartments with different background colors, respectively used to compare the three elements of tooth color and transparency, the accuracy of the comparison results is further improved.

[0011] Preferably, the top surface of the compartment is an inclined surface or a curved surface, and the front end top surface of the compartment is higher than the rear end top surface. The purpose of this design is to optimize the window opening angle, facilitate the insertion of the colorimetric film into the compartment and observe the teeth and the colorimetric film through the window.

[0012] Specifically, the outer wall of the lip guard is an arc surface that fits the shape of the lips, and the outer wall of the gum guard is an arc surface that fits the shape of the gums. The purpose of this design is to improve the shielding effect of the lip guard and the gum guard on the one hand, and to increase comfort during use on the other hand.

[0013] Specifically, the bottom of the gum guard plate is a wavy profile formed by a plurality of semicircular holes connected in sequence. The purpose of this design is to make the bottom profile of the gum guard plate match the contour of the interface between the gums and the teeth, so as to expose as many teeth as possible while ensuring that the gums are completely covered.

[0014] Preferably, the lip guard, tongue depressor and the front end opening of the compartment are detachably connected via buckles, so that the lip guard and tongue depressor can be easily removed for cleaning and disinfection or directly replaced with new disposable lip guard and tongue depressor.

[0015] Specifically, the color temperature of the lighting lamp is 5500K, which is a light source that meets the requirements of the standard colorimetric environment and ensures the accuracy of the colorimetric result.

[0016] Preferably, a slot is provided on the front inner wall of the compartment for installing a colorimetric plate, so that the teeth and the colorimetric plate in the compartment can be directly observed through the window. There is no need to use tools to clamp the colorimetric plate and insert it into the compartment while comparing colors through the window, which makes the operation more convenient.

[0017] Furthermore, a window frame is hinged on the edge of the window, and a one-way transparent glass is installed on the window frame. The one-way transparent glass allows the light inside the compartment to be emitted, and prevents the light outside the compartment from being emitted into the compartment. By hingedly installing the window frame with the one-way transparent glass on the window, stray light in the external environment can be further blocked from entering the compartment to interfere with the colorimetry, thereby further improving the accuracy of the colorimetry. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a schematic diagram of the internal structure of an auxiliary device for tooth color comparison according to the present invention;

[0020] Figure 2 This is a schematic diagram of the front structure of the gingival plate in an embodiment of the present invention;

[0021] In the figure: 1. compartment; 2. handle; 3. window; 4. lip guard; 5. gum guard; 6. tongue depressor; 7. wavy outline; 8. battery; 9. control panel; 10. switch button; 11. card slot; 12. window frame; 13. one-way perspective glass. DETAILED DESCRIPTION

[0022] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Reference Figure 1 The present invention provides an auxiliary device for tooth color comparison, including a compartment 1, a handle 2 is connected to the rear end of the compartment 1, a window 3 is provided on the top surface of the compartment 1, and a colorimetric sheet is inserted into the compartment 1 for color comparison; a plurality of lighting lamps are installed on the inner wall of the compartment 1 to provide a lighting source; a lip guard plate 4 is provided on the upper part of the front end opening of the compartment 1, a gum guard plate 5 is provided on the bottom of the lip guard plate 4, and a tongue depressor 6 is provided on the lower part of the front end opening of the compartment 1.

[0024] The present invention utilizes the closed environment of the compartment 1 to isolate the light interference of the external environment, and only uses the lighting lamp on the inner wall of the compartment 1 to provide the required light source, thereby reducing the error of the colorimetric result; by arranging a lip guard 4 at the upper part of the front end opening of the compartment 1 to cover the lips, and arranging a gum guard 5 at the bottom of the lip guard 4 to cover the gums, and then cooperating with a tongue depressor 6 to cover the biological tissue inside the oral cavity, only the teeth are exposed in the compartment 1, thereby providing a completely isolated colorimetric environment, and further improving the accuracy of the colorimetric result.

[0025] Transparency determination relies on the analysis of light scattering characteristics under a black background, but existing colorimetric systems generally use a single background environment. In conventional white treatment trays, the difference in the refractive index of the enamel layer (n≈1.62) and the background material results in a loss of about 18% of the light flux, making the transparency grading error reach 2 color levels of the VITA 3D-Master system.

[0026] Preferably, there are two compartments 1, which are respectively installed at the front and rear ends of the handle 2; the inner walls of the two compartments 1 are painted with a gray background and a black background, respectively, the gray background is used to compare the three elements of tooth color, and the black background is used to compare the transparency of teeth; by setting two compartments 1 with different background colors, which are respectively used to compare the three elements of tooth color and transparency, the accuracy of the comparison result is further improved.

[0027] In this embodiment, the compartment 1 has a length of 10 to 15 cm, a width of 5 to 8 cm, and a height of 3 to 5 cm.

[0028] Preferably, the top surface of the compartment 1 is an inclined surface or a curved surface, and the front end top surface of the compartment 1 is higher than the rear end top surface. The purpose of this design is to optimize the window opening angle, facilitate the insertion of the colorimetric film into the compartment 1 and the observation of the teeth and the colorimetric film through the window 3, and the teeth and the colorimetric film can be directly observed through the window 3.

[0029] Specifically, the outer wall of the lip guard plate 4 is an arc surface that fits the shape of the lips, and the outer wall of the gum guard plate 5 is an arc surface that fits the shape of the gums. The purpose of this design is to improve the shielding effect of the lip guard plate 4 and the gum guard plate 5 on the one hand, and to increase comfort during use on the other hand.

[0030] In this embodiment, the lip guard 4, gum guard 5 and tongue depressor 6 are all made of medical grade silicone or polycarbonate to ensure their safety and comfort. The lip guard 4 has a length of 8 to 10 cm, a width of 3 to 5 cm, and a thickness of 0.5 to 1 cm.

[0031] In this embodiment, the front ends of the left and right side panels of the compartment 1 are arc-shaped to fit the face, and a buffer pad is provided at the front end of the side panel of the compartment 1. The purpose of this design is, on the one hand, to improve the sealing of the compartment 1 to prevent stray light from the external environment from entering the compartment 1 through the gap where the side panel of the compartment 1 contacts the face, and on the other hand, to increase the comfort of use.

[0032] Specifically, Figure 2 As shown, the bottom of the gum plate 5 is a wavy profile 7 formed by a plurality of semicircular holes connected in sequence. The purpose of this design is to make the bottom profile of the gum plate 5 match the contour of the interface between the gums and the teeth, so as to expose as many teeth as possible while ensuring that the gums are completely covered.

[0033] In this embodiment, the diameter of the semicircular holes of the wavy profile 7 is 0.5-1 cm, and the spacing is 0.3-0.5 cm.

[0034] Preferably, the lip guard 4, the tongue depressor 6 are detachably connected to the front end opening of the compartment 1 via a buckle, so that the lip guard 4 and the tongue depressor 6 can be easily removed for cleaning and disinfection or directly replaced with new disposable lip guard 4 and tongue depressor 6.

[0035] During the specific implementation process, a buckle can be set at the front end of the compartment 1, and grooves are provided on the lip guard plate 4 and the tongue depressor 6, and a snap-in groove is provided in the groove. During installation, the open upper end of the compartment 1 is inserted into the groove corresponding to the lip guard plate 4, and the corresponding buckle is embedded in the snap-in groove, and the open lower end of the compartment 1 is inserted into the corresponding groove on the tongue depressor 6, and the corresponding buckle is embedded in the snap-in groove.

[0036] Specifically, the lighting lamp uses LED lamp beads with a color temperature of 5500K, which is a light source that meets the requirements of the standard colorimetric environment and ensures the accuracy of the colorimetric results. There are 6 lighting lamps in total, 4 of which are respectively located in the four corners of the compartment 1, and the remaining 2 are respectively located in the center of the partitions on both sides of the compartment 1 to ensure uniform lighting and avoid the influence of shadows or uneven lighting on the colorimetric results.

[0037] Preferably, a slot 11 is provided on the inner wall of the front end of the compartment 1 for installing a colorimetric plate, so that the teeth and the colorimetric plate in the compartment 1 can be directly observed through the window 3. There is no need to use tools to clamp the colorimetric plate and insert it into the compartment 1 while performing colorimetric analysis through the window 3, which makes the operation more convenient.

[0038] Furthermore, a window frame 12 is hingedly connected to the edge of the window 3, and a one-way transparent glass 13 is installed on the window frame 12. The one-way transparent glass 13 allows the light inside the compartment 1 to be emitted, and prevents the light outside the compartment 1 from being emitted into the compartment 1; by hingedly installing the window frame 12 with the one-way transparent glass 13 on the window 3, stray light in the external environment can be further blocked from entering the compartment 1 to interfere with the color comparison, thereby further improving the accuracy of the color comparison.

[0039] During the specific implementation, the optical performance parameters of the one-way perspective glass 13 should meet the following requirements:

[0040] Light transmittance: The light transmittance of the one-way perspective glass 13 must meet the following requirements: From inside to outside: allow the light from the light source inside the compartment 1 to pass through, with a light transmittance of ≥80% (wavelength range 400-700nm), to ensure that the operator can clearly observe the color comparison between the teeth and the colorimetric film. From outside to inside: block the external ambient light from entering the compartment 1, with a light transmittance of ≤5% (wavelength range 400-700nm), to avoid stray light interfering with the colorimetric results.

[0041] Reflectivity: When external ambient light is incident on the glass surface, the reflectivity is ≥90% (wavelength range 400-700nm), ensuring that the external light is effectively reflected rather than penetrating into the compartment 1. Spectral characteristics: The spectral response of the glass must match the standard light source (5500K) to avoid colorimetric errors caused by color deviation (such as CIE color difference ΔE<1.0).

[0042] The one-way perspective glass 13 is made of an optical grade glass substrate (such as borosilicate glass) with a thickness of 1.5-2.5 mm, and has high hardness and scratch resistance. Coating design: Inner surface: coated with an anti-reflective coating (AR film) to improve the transmittance of internal light. Outer surface: coated with a metal reflective film (such as aluminum or silver coating) with a thickness of 50-100 nm to achieve high reflectivity and block external light.

[0043] The method of using the auxiliary device in this embodiment is as follows:

[0044] First, insert the colorimetric film into the card slot 11 on the bottom surface of the compartment 1 through the front end opening of the compartment 1 corresponding to the gray background, and then snap the corresponding lip guard 4 and tongue depressor 6 into the front end opening of the compartment 1; then let the patient open his mouth, put the front end of the compartment 1 into the patient's mouth, press the tongue depressor 6 on the tongue, and then let the patient bite the tongue depressor 6 with his maxillary teeth, so that the lip guard 4 blocks the upper lips, and ensure that the gum guard 5 covers the gums; then control the lighting in the compartment 1 to light up through the switch button 10, and observe and compare the color of the teeth and the colorimetric film through the human eye outside the window 3, from which Select the closest colorimetric patches (you can also use a camera to take photos and a computer to perform image analysis to find the closest colorimetric patches); then open the window frame 12, take out the colorimetric patches, insert the closest colorimetric patches into the card slots 11 on the bottom surface of the compartment 1 corresponding to the black background, and then snap the corresponding lip guard 4 and tongue depressor 6 into the front opening of the compartment 1; then repeat the above process, compare the transparency of the teeth and the colorimetric patches under the black background, and select the colorimetric patch with the transparency closest to the teeth from the remaining colorimetric patches as the final colorimetric result. After the colorimetric comparison is completed, the lip guard 4 and tongue depressor 6 at both ends can be removed.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A tooth color matching auxiliary device, characterized in that: The invention comprises a compartment (1), the rear end of the compartment (1) is connected to a handle (2), the top surface of the compartment (1) is provided with a window (3) for inserting a colorimetric sheet for color comparison; a plurality of lighting lamps are installed on the inner wall of the compartment (1) for providing a lighting source; a lip guard plate (4) is provided at the upper part of the front opening of the compartment (1), a gum guard plate (5) is provided at the bottom of the lip guard plate (4), and a tongue depressor (6) is provided at the lower part of the front opening of the compartment (1).

2. A tooth color comparison auxiliary device as claimed in claim 1, characterized in that: The compartments (1) are provided with two compartments (1), which are respectively installed at the front and rear ends of the handle (2); the inner walls of the two compartments (1) are respectively painted with a gray background and a black background, the gray background is used to compare the three elements of tooth color, and the black background is used to compare the transparency of the teeth.

3. The tooth color matching auxiliary device according to claim 1, characterized in that: The top surface of the compartment (1) is an inclined surface or a curved surface, and the top surface at the front end of the compartment (1) is higher than the top surface at the rear end.

4. The tooth color matching auxiliary device according to claim 1, characterized in that: The outer wall of the lip guard plate (4) is a curved surface that fits the shape of the lips, and the outer wall of the gum guard plate (5) is a curved surface that fits the shape of the gums.

5. The tooth color matching auxiliary device according to claim 1, characterized in that: The bottom of the gingival plate (5) is a wavy profile (7) formed by a plurality of semicircular holes connected in sequence.

6. The tooth color matching auxiliary device according to claim 1, characterized in that: The lip guard plate (4), the tongue depressor (6) and the front end opening of the compartment (1) are detachably connected via buckles.

7. The tooth color matching auxiliary device according to claim 1, characterized in that: The color temperature of the lighting lamp is 5500K.

8. The tooth color matching auxiliary device according to claim 1, characterized in that: A battery (8) and a control panel (9) are provided in the inner cavity of the handle (2), and a switch button (10) is provided at the rear end of the top surface of the compartment (1), and the switch button (10) and the lighting lamp are electrically connected to the control panel (9) respectively.

9. The tooth color matching auxiliary device according to claim 1, characterized in that: The front inner wall of the compartment (1) is provided with a slot (11) for installing a colorimetric sheet.

10. The tooth color matching auxiliary device according to claim 9, characterized in that: The edge of the window (3) is hinged with a window frame (12), and a one-way perspective glass (13) is installed on the window frame (12). The one-way perspective glass (13) allows the light inside the compartment (1) to be emitted, and prevents the light outside the compartment (1) from being emitted into.

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