JPH01164361A - Dental hue measuring apparatus - Google Patents
Dental hue measuring apparatusInfo
- Publication number
- JPH01164361A JPH01164361A JP62321524A JP32152487A JPH01164361A JP H01164361 A JPH01164361 A JP H01164361A JP 62321524 A JP62321524 A JP 62321524A JP 32152487 A JP32152487 A JP 32152487A JP H01164361 A JPH01164361 A JP H01164361A
- Authority
- JP
- Japan
- Prior art keywords
- light
- color
- tooth surface
- tooth
- hue
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005259 measurement Methods 0.000 claims description 7
- 230000002265 prevention Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 2
- 101100524644 Toxoplasma gondii ROM4 gene Proteins 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 239000012237 artificial material Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 210000000332 tooth crown Anatomy 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
- G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
- G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
- G01J3/508—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors measuring the colour of teeth
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
- G01J3/463—Colour matching
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は歯科用色彩測定装置、特に人工南作成用色彩
測定装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a dental color measuring device, and particularly to a color measuring device for creating an artificial beam.
歯科において、人工歯を作成する場合、患者固有の歯（
以下固有歯という）の歯面と同じ色彩の人工歯とする必
要がある。従来は、歯科医が固有歯面に光を当て、目視
によって、前記固有歯面をシェードガイド（歯冠色サン
プル）の色彩と比較判定し、該シェードガイドにおける
、例えばＡ、、Ａ、基準のように基準値を決めて、人工
前作成を指示していた。このようにして人工歯を作成し
た場合、光の当て方や、目視で測定するための感覚によ
る差が有ることによって、人工歯作成後、前記固有歯面
との色彩にかなりの誤差を生じる場合があり、苦情が出
る等のことがあった。In dentistry, when creating artificial teeth, patient-specific teeth (
The artificial tooth must have the same color as the tooth surface of the tooth (hereinafter referred to as the natural tooth). Conventionally, a dentist shines light on the unique tooth surface, visually compares the unique tooth surface with the color of a shade guide (tooth crown color sample), and determines the color of the tooth surface in the shade guide, for example, A, , A, and the standard. They decided on standard values and instructed the creation of pre-artificial materials. When artificial teeth are created in this way, there may be a considerable difference in color from the natural tooth surface after the artificial tooth is created due to differences in the way light is applied and the sense of visual measurement. There were some cases where complaints were made.
以上のように、従来例においては、人工歯を作成する場
合、固有歯面と人工歯面の色彩にかなりの誤差を生じる
という問題点があった。As described above, in the conventional example, when creating an artificial tooth, there is a problem in that there is a considerable difference in color between the natural tooth surface and the artificial tooth surface.
この発明は上記のような従来例の問題点を解消するため
になされたもので、固有歯面の色彩と同様の色彩の歯面
を有する人工歯を作成できることを目的とする。This invention was made to solve the problems of the prior art as described above, and an object of the present invention is to make it possible to create an artificial tooth having a tooth surface with a color similar to that of the natural tooth surface.
（問題点を解決するための手段〕
このため、この発明においては、光源による光の誤差を
補正する補正板と、歯面よりの入力光をＲ，Ｇ、Ｂに分
光し、電気信号に変換する色彩色差計と、該色彩色差計
よりの出力を増幅する増幅器と、該増幅器の出力を補正
し、歯面の色彩を判別する判別手段とより形成され、歯
面の色彩を測定する歯科用色彩測定装置により、前記問
題点を解決し、目的を達成しようとするものである。(Means for Solving the Problems) For this reason, the present invention includes a correction plate that corrects the error of light caused by the light source, and splits the input light from the tooth surface into R, G, and B, and converts it into an electrical signal. A dental device for measuring the color of a tooth surface, which is formed by a color difference meter for measuring the color difference, an amplifier for amplifying the output from the color difference meter, and a discrimination means for correcting the output of the amplifier and determining the color of the tooth surface. The aim is to solve the above-mentioned problems and achieve the objectives by using a color measuring device.
（作用）
この発明に右ける歯科用色彩測定装置は、補正板により
光の誤差を補正し、色彩色差計により歯面よりの入力光
をＲ，Ｇ、Ｂに分光して、電気信号に変換し、判別手段
により固有歯面の色彩を判別することにより、固有歯面
の色彩が測定され、色彩判定される。(Function) The dental color measuring device according to the present invention corrects light errors using a correction plate, separates the input light from the tooth surface into R, G, and B using a color difference meter, and converts it into an electrical signal. However, by determining the color of the unique tooth surface by the determining means, the color of the unique tooth surface is measured and the color is determined.
（実施例〕 以下この発明の実施例を図面に基づいて説明する。(Example〕 Embodiments of the present invention will be described below based on the drawings.
第１図はこの発明の一実施例を示す歯科用色彩測定装置
（以下装置という）の概略構成を示す模式図、第２図は
第１図の各部分の構成内容を示すブロック図、第３図は
この実施例の概念を示す外観図、第４図はこの実施例の
色彩色差計の側断面図、第５図は第４図の一部拡大図で
あり第５図（ａ）はＡ−Ａ断面側断面図、第５図（ｂ）
は正面図である。又第６図はこの実施例の色彩色差計の
回路図、第７図はこの実施例の色彩色差計の電気回路図
、第８図はこの実施例の判別動作を制御するフローチャ
ートであり、第１図乃至第５図中、１はこの実施例の装
置により測定される固有歯、２は固有歯１の像をＲＧＢ
受光素子２ｃに結像するレンズ２ａと、出力光周波数が
安定しており、色彩の測定粒度を向上させる発光素子（
ＬＥＤ）２ｂと、Ｒ，Ｇ。FIG. 1 is a schematic diagram showing the general configuration of a dental color measuring device (hereinafter referred to as the device) showing an embodiment of the present invention, FIG. 2 is a block diagram showing the configuration of each part of FIG. 1, and FIG. The figure is an external view showing the concept of this embodiment, FIG. 4 is a side sectional view of the color difference meter of this embodiment, FIG. 5 is a partially enlarged view of FIG. 4, and FIG. 5(a) is an A -A section side sectional view, Fig. 5(b)
is a front view. 6 is a circuit diagram of the color difference meter of this embodiment, FIG. 7 is an electric circuit diagram of the color difference meter of this embodiment, and FIG. 8 is a flowchart for controlling the discrimination operation of this embodiment. 1 to 5, 1 is the unique tooth measured by the device of this embodiment, and 2 is the RGB image of the unique tooth 1.
A lens 2a that forms an image on the light-receiving element 2c, and a light-emitting element (
LED) 2b, R, G.
Ｂの３原色を独立に同時に計測できる、例えばセラミッ
ク系で特に白系の色差測定に有利なＫＧＢ受光素子２ｃ
と、受光素子２ｃから入った微小電流を演算１表示装置
へ伝達するのに充分な電圧に変換してＡ／Ｄ変換部３へ
情報を送る増幅部２ｄと、被測定物である固有歯に直接
密着して接触する先１４２ｆが開口しており、例えばラ
バー製で、被測定者が変る毎に人手により着脱可能であ
り、先端部の光の漏れを防ぐ光漏れ防止カバー２０とを
具備し前記のように固有歯１よりの入力光をＲ，Ｇ、Ｈ
に分光し、電気信号に変換する色彩色差計であり、前記
ＲＧＢ受光素子２Ｃは測定緒度を向上させるためにレン
ズ２ａ系を用いて固有歯の中央に焦点が合うように設計
され、前記固有歯の中央の直径２ｎ＋ｍの領域を測定す
るようにされている。次に３は色彩色差計２よりの出力
を増幅する２次増幅回路と、アナログ信号である電気信
号をデジタル信号に変換するＡ／Ｄ変換とＲｅｇｉｓｔ
ｅｒとを具備し、例えば１０ ｂｉｔ ｂｕｓでＣＰＵ
４と連結している増幅器、４は前記デジタル化されたデ
ータ信号を色情報として演算しなおすデータ変換と、補
正白板６による光源（発光素子）の測定データによる補
正と、補正後のデータを歯の色差情報としてＲＯＭ４ａ
に収められているシェードガイドデータとを比較して判
別する判別手段であり、色情報として表示装置５に表示
するＣＰＵである。A KGB light receiving element 2c that can measure the three primary colors of B independently and simultaneously, for example, is a ceramic type and is particularly advantageous for measuring white color differences.
, an amplifier section 2d that converts the minute current input from the light-receiving element 2c into a voltage sufficient to transmit it to the arithmetic unit 1 display device, and sends the information to the A/D converter section 3; The tip 142f that comes into direct close contact is open, and is made of rubber, for example, and can be manually attached and detached each time the person to be measured changes, and is equipped with a light leakage prevention cover 20 that prevents light from leaking from the tip. As mentioned above, the input light from the unique tooth 1 is divided into R, G, H
The RGB light receiving element 2C is designed to focus on the center of the eigentooth using a lens 2a system in order to improve measurement accuracy. A region with a diameter of 2n+m at the center of the tooth is measured. Next, 3 is a secondary amplification circuit that amplifies the output from the color difference meter 2, an A/D conversion circuit that converts an electric signal that is an analog signal into a digital signal, and a register.
For example, the CPU is equipped with a 10 bit bus.
The amplifier 4 connected to 4 performs data conversion to recalculate the digitized data signal as color information, correction using the measurement data of the light source (light emitting element) by the correction white plate 6, and outputs the corrected data to the teeth. ROM4a as color difference information
This is a CPU that compares and discriminates the shade guide data stored in the shade guide data, and displays it on the display device 5 as color information.
各図中、同一符号は同一、又は相当部分を示す。In each figure, the same reference numerals indicate the same or corresponding parts.
次にこの実施例の装置の動作を第１図乃至第７図を用い
て説明する。Next, the operation of the apparatus of this embodiment will be explained using FIGS. 1 to 7.
第１図乃至第７図において、色彩色差計２（第４図）の
発光素子２ｂにより照射された固有ｉ′＆１からの反射
光は、レンズ２ａにより受光素子２Ｃに結像し、入力さ
れる。この入力光はＲＧＢ受光素子２ｃでＲ，Ｇ、Ｂ独
立に同時に計測され、この計測された微小電流は増幅部
２ｄで増幅されてＡ／Ｄ変換部３へ送られる。Ａ／Ｄ変
換部３に人力されたデータ信号は、２次増幅され、Ａ／
Ｄ変換されてデジタル信号となる。In FIGS. 1 to 7, the reflected light from the characteristic i'& 1 irradiated by the light emitting element 2b of the color difference meter 2 (FIG. 4) is imaged by the lens 2a on the light receiving element 2C and inputted. . This input light is measured independently and simultaneously for R, G, and B by the RGB light receiving element 2c, and the measured minute current is amplified by the amplifier 2d and sent to the A/D converter 3. The data signal input to the A/D converter 3 is secondarily amplified and converted into an A/D converter.
It is converted into a digital signal.
デジタル化されたデータ信号はＣＰＵ４に人力され、補
正白板６による光源の測定データで補正され、再びＡ／
Ｄ変換して色情報とし、この色情報のデータとＲＯＭ４
ａのシェードガイドデータとを比較し、固有歯１の色彩
を判別し、固有歯１の色情報として表示装置５に表示さ
れる。この表示を読みとり、測定を完了する。The digitized data signal is manually input to the CPU 4, corrected using the light source measurement data by the correction white board 6, and then re-analyzed.
D-convert it to color information, and store this color information data and ROM4
The color of the unique tooth 1 is determined by comparing with the shade guide data of a, and is displayed on the display device 5 as color information of the unique tooth 1. Read this display and complete the measurement.
次にこの実施例における補正について第１図を用いて説
明する。Next, correction in this embodiment will be explained using FIG. 1.
まず、電源を人力し、光源である発光素子２ｂの安定の
ために数分間そのままにしておく。First, the power is turned on manually and left for several minutes to stabilize the light emitting element 2b, which is the light source.
次に補正白板６に色彩色差計２の先端２ｆをセットし、
補正スイッチ４ｂを押す。補正データ信号は、前記の実
施例の装置の動作と同様に色彩色差計２．増幅器３を通
り、ＣＰＵ４により前記のように補正を完了する。Next, set the tip 2f of the color difference meter 2 on the correction white board 6,
Press the correction switch 4b. The correction data signal is sent to the color difference meter 2. similar to the operation of the apparatus of the previous embodiment. The signal passes through the amplifier 3 and the correction is completed by the CPU 4 as described above.
次にこの実施例の装置による判別動作の制御を第８図を
用いて説明する。Next, the control of the discrimination operation by the apparatus of this embodiment will be explained with reference to FIG.
第８図において、ステップ３ａでスタートし、ステップ
３ｂで補正白板６よりの補正のための電気信号を入力す
る。続いてステップ３ｃにおいてアナログ信号である電
気信号をデジタル信号にＡ／Ｄ変換し、ステップ３ｄに
進む。ステップ３ｄで光源２ｂの光の誤差を補正する。In FIG. 8, the process starts in step 3a, and in step 3b, an electric signal for correction from the correction white board 6 is input. Subsequently, in step 3c, the electric signal, which is an analog signal, is A/D converted into a digital signal, and the process proceeds to step 3d. In step 3d, errors in the light from the light source 2b are corrected.
続いてステップ３ｅにおいて、固有歯ｌよりの信号を人
力し、ステップ３ｆで該信号をＡ／Ｄ変換する。次にス
テップ３ｇでＡ／Ｄ変換されたデータ信号値とＣＰＵ４
に内蔵する基準値であるシェードガイドデータを比較し
判定する。信号値と基準値が合致すればステップ３ｈに
進み表示装置５に表示する。続いてステップ３１に進み
完了する。Subsequently, in step 3e, the signal from the unique tooth l is input manually, and in step 3f, the signal is A/D converted. Next, in step 3g, the A/D converted data signal value and the CPU 4
The judgment is made by comparing the shade guide data, which is a reference value built in. If the signal value and the reference value match, the process proceeds to step 3h and is displayed on the display device 5. The process then proceeds to step 31 and is completed.
ステップ３ｇで信号値が基準値に合致しなければステッ
プ３ｇに戻り、別の基準値と比較判定して次のステップ
に進む。If the signal value does not match the reference value in step 3g, the process returns to step 3g, compares it with another reference value, and proceeds to the next step.
以上説明したように、この発明によれば、光源による光
の誤差を補正する補正板と、歯面よりの入力光をＲ，Ｇ
、Ｂに分光し、電気信号に変換する色彩色差計と、色彩
色差計よりの出力を増幅する増幅器と、増幅器の出力を
補正し、歯面の色彩を判別する判別手段とより形成され
、ｔｈ面の色彩を測定することにより、固有歯面の色彩
と同様の色彩の歯面を有する人工歯を作成することがで
きる効果がある。As explained above, according to the present invention, there is provided a correction plate that corrects the error of light caused by the light source, and a correction plate that corrects the error of light from the tooth surface.
, B, and converts it into an electric signal, an amplifier that amplifies the output from the color difference meter, and a discrimination means that corrects the output of the amplifier and discriminates the color of the tooth surface. By measuring the color of the surface, it is possible to create an artificial tooth having a tooth surface with a color similar to that of the natural tooth surface.
第１図はこの発明の一実施例を示す装置の概略構成を示
す模式図、第２図は第１図の各部分の構成内容を示すブ
ロック図、第３図はこの実施例のＳ念を示す外観図、第
４図はこの実施例の色彩色差計の側断面図、第５図は第
４図の一部拡大図であり、第５図（ａ）はＡ−Ａ断面側
断面図、第５図（ｂ）は正面図である。第６図はこの実
施例の色彩色差計の回路図、第７図はこの実施例の色彩
色差計の電気回路図、第８図はこの実施例の判別動作を
制御するフローチャートである。
１−−−−−固有歯
２・−・・・色彩色差計
２ ｂ −−−−一発光素子
２ ｃ ＝ ・” ＲＧ Ｂ受光素子
２ ｅ −−−−−−光漏れ防止カバー３−−−−−−
増幅器
４・・・−ＣＰ Ｕ
５・・・・・・表示装置FIG. 1 is a schematic diagram showing a schematic configuration of an apparatus showing an embodiment of the present invention, FIG. 2 is a block diagram showing the configuration of each part of FIG. 1, and FIG. 4 is a side sectional view of the color difference meter of this embodiment, FIG. 5 is a partially enlarged view of FIG. 4, and FIG. 5(a) is a side sectional view taken along line A-A. FIG. 5(b) is a front view. FIG. 6 is a circuit diagram of the color difference meter of this embodiment, FIG. 7 is an electric circuit diagram of the color difference meter of this embodiment, and FIG. 8 is a flowchart for controlling the discrimination operation of this embodiment. 1-----Special teeth 2---Color difference meter 2 b----One light-emitting element 2 c=・" RG B light-receiving element 2 e----Light leakage prevention cover 3-- ------
Amplifier 4...-CPU 5...Display device
Claims (2)
りの入力光をＲ、Ｇ、Ｂに分光し、電気信号に変換する
色彩色差計と、該色彩色差計よりの出力を増幅する増幅
器と、該増幅器の出力を補正し、歯面の色彩を判別する
判別手段とより形成され、歯面の色彩を測定することを
特徴とする歯科用色彩測定装置。(1) A correction plate that corrects light errors caused by the light source, a color difference meter that separates the input light from the tooth surface into R, G, and B and converts it into an electrical signal, and amplifies the output from the color difference meter. What is claimed is: 1. A dental color measurement device comprising: an amplifier for measuring the color of a tooth surface; and a determining means for correcting the output of the amplifier to determine the color of a tooth surface.
ＲＧＢ受光素子と、出力光周波数が安定しており、色彩
の測定精度を向上させる発光素子と、先端部の光の漏れ
を防ぐ光漏れ防止カバーとを具備することを特徴とする
特許請求の範囲第１項記載の歯科用色彩測定装置。(2) The color difference meter has an RGB light receiving element that can measure R, G, and B independently and simultaneously, a light emitting element that has a stable output light frequency and improves color measurement accuracy, and prevents light leakage at the tip. The dental color measuring device according to claim 1, further comprising a light leakage prevention cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62321524A JPH01164361A (en) | 1987-12-21 | 1987-12-21 | Dental hue measuring apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62321524A JPH01164361A (en) | 1987-12-21 | 1987-12-21 | Dental hue measuring apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01164361A true JPH01164361A (en) | 1989-06-28 |
| JPH0344531B2 JPH0344531B2 (en) | 1991-07-08 |
Family
ID=18133532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62321524A Granted JPH01164361A (en) | 1987-12-21 | 1987-12-21 | Dental hue measuring apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01164361A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991002955A1 (en) * | 1989-08-15 | 1991-03-07 | Sameul Thomas John Mckeown | Shade distinguishing device |
| WO2000063661A1 (en) * | 1999-04-19 | 2000-10-26 | Österreichisches Forschungszentrum Seibersdorf Ges.Mbh | Method and device for determining the color of teeth |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5311079A (en) * | 1976-07-15 | 1978-02-01 | Sterndent Corp | Method of producing colorimeter and mixed ceramic material |
-
1987
- 1987-12-21 JP JP62321524A patent/JPH01164361A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5311079A (en) * | 1976-07-15 | 1978-02-01 | Sterndent Corp | Method of producing colorimeter and mixed ceramic material |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991002955A1 (en) * | 1989-08-15 | 1991-03-07 | Sameul Thomas John Mckeown | Shade distinguishing device |
| WO2000063661A1 (en) * | 1999-04-19 | 2000-10-26 | Österreichisches Forschungszentrum Seibersdorf Ges.Mbh | Method and device for determining the color of teeth |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0344531B2 (en) | 1991-07-08 |
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