JPH0531127A - Color tone adjustment of crown restoration and working model and adhesive for crown restoration used therefor - Google Patents
Color tone adjustment of crown restoration and working model and adhesive for crown restoration used thereforInfo
- Publication number
- JPH0531127A JPH0531127A JP3187685A JP18768591A JPH0531127A JP H0531127 A JPH0531127 A JP H0531127A JP 3187685 A JP3187685 A JP 3187685A JP 18768591 A JP18768591 A JP 18768591A JP H0531127 A JPH0531127 A JP H0531127A
- Authority
- JP
- Japan
- Prior art keywords
- crown restoration
- color tone
- crown
- working model
- restoration
- 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.)
- Pending
Links
Landscapes
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
- Dental Prosthetics (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、歯冠修復物の色調調整
方法及びそれに使用する歯冠修復物用作業模型並びに接
着剤に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for adjusting the color tone of a crown restoration, a working model for a crown restoration and an adhesive used therefor.
【０００２】[0002]
【従来の技術】従来、罹患した歯または脱落した歯を修
復するために用いられる歯冠修復物には、優れた審美性
が要求されている。このような歯冠修復物としては、例
えば、れ金属焼付け陶材冠（メタルボンド）やキャスタ
ブル・セラミックス等がある。2. Description of the Related Art Conventionally, a crown restoration used to restore a diseased tooth or a missing tooth is required to have excellent aesthetics. Such crown restorations include, for example, burned porcelain crowns (metal bonds) and castable ceramics.
【０００３】ここで、キャスタブル・セラミックスと
は、ガラスセラミックスをロストワックス法にて鋳型成
形した歯冠修復物のことをいう。すなわち、例えば、罹
患した歯牙を切削して支台歯を作製する。次いで、この
支台歯の印象を採得し、この印象に作業模型用材料を流
し込んで作業模型を作製する。この作業模型の上で正常
な歯冠形状を再現したワックスアップしてワックスパタ
ーンを作製する。このワックスパターンにスプルー線を
植立する。次いで、このワックスパターンを、筐体中央
に配置した後、この筐体に、例えば、リン酸塩系鋳型材
を注入してワックスパターンを埋没する。然る後、リン
酸塩系鋳型材を、室温で１〜数時間硬化させる。その
後、約８００℃に加熱してワックスパターンを焼却し
て、歯冠修復物用の鋳型を得る。この鋳型に、ガラスセ
ラミックスを、加圧また遠心力をかけながら鋳造する。
放冷後鋳型から取り出して、キャスタブル・セラミック
スを得る。キャスタブル・セラミックスは、金属または
合金を使用した歯冠修復物に比べ、審美性や耐蝕性に優
れかつ安価である等の長所を有する。Here, the castable ceramics refers to a restoration of a crown formed by molding glass ceramics by a lost wax method. That is, for example, the affected tooth is cut to produce an abutment tooth. Next, an impression of this abutment tooth is taken, and a work model material is poured into this impression to produce a work model. A wax pattern is produced by waxing up a normal crown shape on this work model. The sprue line is planted in this wax pattern. Next, after disposing the wax pattern in the center of the housing, for example, a phosphate mold material is injected into the housing to bury the wax pattern. Then, the phosphate template material is cured at room temperature for 1 to several hours. Then, the wax pattern is incinerated by heating to about 800 ° C. to obtain a mold for a crown restoration. Glass ceramics are cast in this mold while applying pressure or centrifugal force.
After allowing to cool, it is taken out of the mold to obtain castable ceramics. Castable ceramics have advantages such as excellent aesthetics and corrosion resistance and low cost, as compared with a crown restoration using a metal or an alloy.
【０００４】一方、治療後の歯牙と天然の歯牙とが一見
して識別できないように、歯冠修復物の色調を周辺の天
然歯牙の色調と一致するように調整することが行われて
いる。歯冠修復物の色調調整は、歯冠修復物を作業模型
に固定した後、所定の着色剤で着色して行われている。
このように色調を調整した後、歯冠修復物を、接着剤を
使用して口腔内の支台歯に接着している。この接着剤
は、天然歯の色調と近似させるために黄褐色に着色され
ている。On the other hand, the color tone of the crown restoration is adjusted so as to match the color tone of the surrounding natural tooth so that the tooth after treatment and the natural tooth cannot be distinguished at first glance. The color tone of the crown restoration is adjusted by fixing the crown restoration to the working model and then coloring it with a predetermined coloring agent.
After adjusting the color tone in this manner, the crown restoration is bonded to the abutment tooth in the oral cavity using an adhesive. This adhesive is colored yellowish brown to approximate the color of natural teeth.
【０００５】このような色調調整の際に、上述の金属焼
付け陶材冠は、内側に金属層を持つために、作業模型お
よび接着剤の色調が歯冠修復物の色調に影響することは
ない。しかし、上述のキャスタブル・セラミックスは半
透明であり、かつ、金属層のような不透明層がない。こ
のため、キャスタブル・セラミックスを口腔内の支台歯
の上に接着した場合、歯冠修復物の色調に支台歯及び不
透明接着剤の色が影響し易い。この結果、作業模型の上
での歯冠修復物の色調と、実際に患者の支台歯に接着し
たときの歯冠修復物の色調とが微妙に異なる。現在、治
療した歯牙の外観に対する患者の要望は極めて高く、こ
のような色調の誤差が大きな問題となっている。In such a color tone adjustment, since the above-mentioned metal-baked porcelain crown has a metal layer inside, the color tone of the work model and the adhesive does not affect the color tone of the crown restoration. . However, the castable ceramics described above are translucent and do not have an opaque layer such as a metal layer. Therefore, when the castable ceramics are bonded onto the abutment teeth in the oral cavity, the color of the abutment teeth and the opaque adhesive is likely to affect the color tone of the crown restoration. As a result, the color tone of the crown restoration on the working model is slightly different from the color tone of the crown restoration when actually bonded to the abutment tooth of the patient. At present, patients have a very high demand for the appearance of treated teeth, and such an error in color tone is a serious problem.
【０００６】従来、このような色調の誤差を修正するた
めに、作業模型の上で、支台歯に接着したときの歯冠修
復物の色調を正確に確認できるように、使用する接着剤
と同色のペーストを歯冠修復物の内面に塗布することが
行われている。[0006] Conventionally, in order to correct such an error in color tone, an adhesive to be used has been used so that the color tone of the crown restoration when adhered to the abutment tooth can be accurately confirmed on the working model. The same color paste is applied to the inner surface of the restoration.
【０００７】[0007]
【発明が解決しようとする課題】しかしながら、歯冠修
復物の内面にペーストを塗布した場合には、色調調整後
にペーストを除去する必要があるが完全に除去すること
は困難である。このため、残存したペーストにより、歯
冠修復物を口腔内の支台歯の上に接着するときに支台歯
および歯冠修復物の間の接着性が低下し易い。However, when the paste is applied to the inner surface of the dental restoration, it is necessary to remove the paste after adjusting the color tone, but it is difficult to completely remove it. Therefore, the remaining paste tends to reduce the adhesiveness between the abutment tooth and the crown restoration when the crown restoration is bonded onto the abutment tooth in the oral cavity.
【０００８】また、色調調整は、一般に、顔料およびガ
ラスセラミックス粉末の混合物を溶媒で練和したものを
歯冠修復物の表面に塗布した後、この歯冠修復物を焼成
して着色するステイングにより行われる。このため、上
述した残存するペーストは、焼成工程で煤となって歯冠
修復物の内側に残存し、上述のような接着性の低下を引
き起こす等の問題がある。The color tone adjustment is generally carried out by applying a mixture prepared by kneading a mixture of a pigment and glass ceramic powder with a solvent to the surface of the prosthetic restoration and then baking the prosthetic restoration for coloring. Done. Therefore, the above-mentioned remaining paste becomes soot in the firing process and remains inside the crown restoration, causing a problem such as the above-mentioned decrease in adhesiveness.
【０００９】本発明は、かかる点に鑑みてなされたもの
であり、高度な審美性を要求される歯冠修復において、
作業模型上で口腔内における歯冠修復物の色調を容易に
再現できる歯冠修復物の色調調整方法、およびそれに使
用する歯冠修復物用作業模型並びに接着剤を提供するも
のである。The present invention has been made in view of the above points, and in the crown restoration which requires a high degree of aesthetics,
The present invention provides a method for adjusting the color tone of a crown restoration capable of easily reproducing the color tone of the crown restoration in the oral cavity on the working model, a working model for a crown restoration used for the method, and an adhesive.
【００１０】[0010]
【課題を解決するための手段】本発明は、半透明の歯冠
修復物を作業模型の上に固定して該歯冠修復物の色調を
調整する歯冠修復物の色調調整方法であって、前記作業
模型の少なくとも支台歯に対応する部分の色調と、前記
歯冠修復物を口腔内の支台歯の上に接着するために用い
る不透明接着剤の色調とを同一にすることを特徴とする
歯冠修復物の色調調整方法を提供する。The present invention relates to a method for adjusting the color tone of a crown restoration by fixing a translucent crown restoration on a working model and adjusting the color tone of the crown restoration. The color tone of at least a portion of the working model corresponding to the abutment tooth and the color tone of the opaque adhesive used for adhering the crown restoration onto the abutment tooth in the oral cavity are the same. The present invention provides a method for adjusting the color tone of a crown restoration.
【００１１】また、本発明は、支台歯に対応する部分を
有する歯冠修復物用作業模型であって、少なくとも前記
支台歯に対応する部分の色調が、前記歯冠修復物を口腔
内の支台歯の上に接着するために用いる不透明接着剤と
同一であることを特徴とする歯冠修復物用作業模型を提
供する。ここで、本発明の歯冠修復物用作業模型は、作
業模型の歯肉に対応する部分の色調が歯肉と同一である
ことが好ましい。Further, the present invention is a working model for a crown restoration having a portion corresponding to an abutment tooth, wherein the color tone of at least the portion corresponding to the abutment tooth is the crown restoration in the oral cavity. To provide a working model for a crown restoration characterized by being the same as an opaque adhesive used for adhering on an abutment tooth. Here, in the working model for dental prosthesis of the present invention, the color tone of the part of the working model corresponding to the gingiva is preferably the same as the gingiva.
【００１２】また、本発明は、半透明の歯冠修復物を口
腔内の支台歯の上に接着するために用いる不透明接着剤
であって、作業模型の前記支台歯に対応する部分と同一
の色調を有する歯冠修復物用接着剤を提供する。Further, the present invention is an opaque adhesive used for adhering a translucent crown restoration on an abutment tooth in the oral cavity, and a portion corresponding to the abutment tooth of a working model. An adhesive for a crown restoration having the same color tone.
【００１３】[0013]
【作用】本発明の歯冠修復物の色調調整方法、およびそ
れに使用する歯冠修復物用作業模型並びに接着剤によれ
ば、作業模型の少なくとも支台歯に対応する部分と、支
台歯に歯冠修復物を接着するために用いる不透明接着剤
の色調を同一にすることにより、作業模型の上で色調を
調整するときに、不透明接着剤による歯冠修復物の色調
への影響を容易に確認できる。また、歯冠修復物にペー
ストを塗布する必要がないので異物が歯冠修復物に付着
する恐れが少ない。According to the method for adjusting the color tone of a crown restoration of the present invention, and the working model for a crown restoration and the adhesive used therefor, at least a portion of the working model corresponding to the abutment tooth and the abutment tooth are By making the color tone of the opaque adhesives used to bond the crown restorations the same, the effect of the opaque adhesives on the color tone of the crown restorations can be facilitated when adjusting the color tone on the working model. I can confirm. In addition, since it is not necessary to apply the paste to the crown restoration, foreign matters are less likely to adhere to the crown restoration.
【００１４】[0014]
【実施例】以下、本発明の実施例を図面を参照して詳細
に説明する。図１および図２は、本発明の歯冠修復物の
色調調整方法を適用した歯冠修復物を作業模型に装着し
た状態を示す斜視図および断面図である。Embodiments of the present invention will now be described in detail with reference to the drawings. 1 and 2 are a perspective view and a cross-sectional view showing a state in which a crown restoration to which the color tone adjusting method for a crown restoration of the present invention is applied is attached to a working model.
【００１５】まず、罹患した歯牙を切削して支台歯を形
成する。この支台歯の印象を採得し、この印象に、例え
ば、水または練和液で練和した超硬石膏を流し込んで作
業模型１１を作製する。超硬石膏は、硫酸カルシウムを
主成分とし、象牙質に近似した淡黄褐色を呈している。
作業模型１１は、図２に示す如く、支台歯に対応した支
台歯部分１２と、歯肉に対応した歯肉部分１３と、土台
部１４からなる。First, the affected tooth is cut to form an abutment tooth. An impression of this abutment tooth is taken, and, for example, a superhard gypsum kneaded with water or a kneading liquid is poured into this impression to produce the working model 11. Ultra-hard gypsum is mainly composed of calcium sulfate and has a pale yellowish brown color similar to dentin.
As shown in FIG. 2, the working model 11 includes an abutment tooth portion 12 corresponding to an abutment tooth, a gingival portion 13 corresponding to a gingiva, and a base portion 14.
【００１６】次に、作業模型１１を使用して、特開昭６
２−２０４７４１号公報に開示された方法に従って、マ
イカ−スポジウメン系セラミックス製の歯冠修復物１５
を作製する。歯冠修復物１５は半透明である。Next, by using the working model 11, Japanese Patent Laid-Open No.
According to the method disclosed in JP-A-2-204741, a dental crown restoration made of mica-spodium-based ceramics 15
To make. The dental restoration 15 is translucent.
【００１７】一方、少なくとも支台歯部分１２を含む作
業模型１１を、歯冠修復物１５を口腔内の支台歯に接着
するのに使用する合着用接着剤と同色に着色する。合着
用接着剤は、半透明な歯冠修復物１５を天然歯に近似さ
せるために、象牙質に近似した淡黄褐色に着色されてい
る。例えば、合着用接着剤は、Ｃ．Ｉ．ＰｉｒｅｃｔＹ
ｅｌｌｏｗ１２，４４，５０のような黄色系染料、Ｏｒ
ａｎｇｅ２６のような橙色計染料、Ｒｅｄ２のような赤
色系染料、その他、紫色系、青色系、緑色系染料等の種
々の染料を適宜選択して総量で０〜５重量％混合されて
いる。また、Ｚｒ−Ｓｉ−Ｐｒからなるプラセオジウム
黄のような顔料を混合することもできる。On the other hand, the working model 11 including at least the abutment tooth portion 12 is colored in the same color as the fitting adhesive used for adhering the crown restoration 15 to the abutment tooth in the oral cavity. The bonding adhesive is colored in a light yellowish brown color similar to dentin in order to make the translucent crown restoration 15 close to natural teeth. For example, an adhesive for wearing a joint is C.I. I. DirectY
yellow dyes such as ellow12,44,50, Or
Various dyes such as orange dyes such as age26, red dyes such as Red2, and purple dyes, blue dyes, and green dyes are appropriately selected and mixed in a total amount of 0 to 5% by weight. It is also possible to mix a pigment such as praseodymium yellow composed of Zr-Si-Pr.
【００１８】作業模型１１の着色は、例えば支台歯の印
象に流し込む前に、上述の合着用接着剤の着色に使用し
た染料および顔料を同様に混合することにより行うこと
ができる。The working model 11 can be colored by, for example, mixing the dyes and pigments used for coloring the above-mentioned adhesive for bonding together before pouring the impression on the abutment teeth.
【００１９】このように着色した作業模型１１の支台歯
部分１２に、歯冠修復物１５を装着して、歯冠修復物１
５の色調を調整する。色調の調整は、例えば、顔料とガ
ラス粉末とを溶媒で練和した混合物を、歯冠修復物１５
の表面に塗付した後焼成することにより行われる（ステ
イニング）。この着色操作において、術者は発色の程度
を目視で確認しつつ数回重ねぬりをする。A crown restoration 15 is attached to the abutment tooth portion 12 of the work model 11 colored in this way, and the crown restoration 1
Adjust the color tone of 5. To adjust the color tone, for example, a mixture prepared by kneading a pigment and glass powder with a solvent may be used to prepare a crown restoration 15
It is carried out by applying it to the surface of and baking it (staining). In this coloring operation, the operator repeats the coloring several times while visually confirming the degree of color development.
【００２０】また、歯肉部分１３をヒトの歯肉と同色に
着色することにより、作業模型１１を、より口腔内に近
似した状態に再現することができる。例えば、歯肉部分
１３に、上述の染料および顔料の少なくとも１種を、総
量で０〜１０重量％混合した、例えば、シリコンラバ
ー、パラフィンワックス等の室温で容易に可塑変形し得
る軟性部材を設けることができる。Further, by coloring the gingival part 13 in the same color as that of human gingiva, the working model 11 can be reproduced in a state closer to the oral cavity. For example, the gingival part 13 is provided with a soft member such as silicon rubber or paraffin wax, which is mixed with at least one of the above-mentioned dyes and pigments in a total amount of 0 to 10% by weight and which can be easily plastically deformed at room temperature. You can
【００２１】このように本発明の歯冠修復物の色調調整
方法によれば、作業模型１１の色を合着接着剤の色と同
一にしているので、作業模型の上で歯冠修復物の色調
と、支台歯に接着したときの歯冠修復物の色調との間に
誤差が生じるのを防止できる。この結果、口腔内で色調
調整を行なうのと同様の状態で、歯冠修復物１５の色調
を調整することができる。また、色調を調整した歯冠修
復物を、上述の合着接着剤を用いて口腔内の支台歯上に
接着した場合にも、予め合着接着剤と同色の作業模型１
１の上で色調の調整を行なっているので、作業模型１１
の上での歯冠修復物１５の色調と、口腔内の支台歯の上
に接着したときの歯冠修復物１５の色調との間に大きな
誤差が生じるのを略完全に防止することができる。この
結果、治療後の歯牙の審美性を著しく向上させることが
できる。As described above, according to the method of adjusting the color tone of the crown restoration of the present invention, the color of the working model 11 is made the same as the color of the coalescing adhesive. It is possible to prevent an error from occurring between the color tone and the color tone of the crown restoration when it is adhered to the abutment tooth. As a result, the color tone of the crown restoration 15 can be adjusted in the same state as when the color tone is adjusted in the oral cavity. Further, when the restoration of the crown whose color tone has been adjusted is adhered onto the abutment tooth in the oral cavity using the above-mentioned adhesive adhesive, the work model 1 having the same color as the adhesive adhesive is prepared in advance.
Since the color tone is adjusted on the 1st model, the working model 11
It is possible to substantially completely prevent a large error from occurring between the color tone of the crown restoration 15 on the tooth and the color tone of the crown restoration 15 when it is adhered onto the abutment tooth in the oral cavity. it can. As a result, the aesthetics of the tooth after treatment can be significantly improved.
【００２２】ここでは、歯冠修復物１５として、歯冠全
体を修復する全部被覆冠を例に挙げて説明したが、歯冠
修復物の形態はそれに限定されるものではなく、部分的
な修復においても可能である。Here, the crown restoration 15 has been described by exemplifying a fully covered crown that restores the entire crown, but the form of the crown restoration is not limited to that, and a partial restoration is performed. Is also possible.
【００２３】[0023]
【発明の効果】本発明の歯冠修復物の色調調整方法、及
びそれに使用する作業模型並びに接着剤によれば、歯冠
修復物を装着する作業模型の色と、歯冠修復物を口腔内
の支台歯に接着する不透明接着剤の色を同一にすること
により、作業模型の上で歯冠修復物の色調と、口腔内の
支台歯に接着したときの歯冠修復物の色調との間に誤差
が生じるのを防止することができる。この結果、歯冠修
復物の審美性を著しく改善することができる等顕著な効
果を奏する。According to the method for adjusting the color tone of a crown restoration of the present invention, and the working model and the adhesive used for the method, the color of the working model on which the crown restoration is mounted and the crown restoration are taken in the oral cavity. By making the color of the opaque adhesive that adheres to the abutment tooth of the same, the color tone of the crown restoration on the working model and the color tone of the crown restoration when adhered to the abutment tooth in the oral cavity It is possible to prevent an error from occurring between the two. As a result, the aesthetics of the crown restoration can be remarkably improved, and a remarkable effect can be obtained.
【図１】本発明の歯冠修復物の色調調整方法を適用した
歯冠修復物を作業模型に装着した状態を示す斜視図。FIG. 1 is a perspective view showing a state where a crown restoration to which a color tone adjusting method for a crown restoration of the present invention is applied is mounted on a working model.
【図２】本発明の歯冠修復物の色調調整方法を適用した
歯冠修復物を作業模型に装着した状態を示す断面図。FIG. 2 is a cross-sectional view showing a state where a crown restoration to which the color tone adjusting method for a crown restoration of the present invention is applied is attached to a working model.
１１…作業模型、１２…支台歯部分、１３…歯肉部分、
１４…土台部、１５…歯冠修復物。11 ... Working model, 12 ... Abutment tooth part, 13 ... Gingival part,
14 ... Base part, 15 ... Crown restoration.
Claims (4)
定して該歯冠修復物の色調を調整する歯冠修復物の色調
調整方法であって、前記作業模型の少なくとも支台歯に
対応する部分の色調と、前記歯冠修復物を口腔内の支台
歯の上に接着するために用いる不透明接着剤の色調とを
同一にすることを特徴とする歯冠修復物の色調調整方
法。1. A method for adjusting the color tone of a crown restoration by fixing a translucent crown restoration on a working model to adjust the color tone of the crown restoration, comprising at least an abutment of the working model. A color tone of a crown restoration characterized in that the color tone of a portion corresponding to a tooth is the same as the color tone of an opaque adhesive used to bond the crown restoration onto an abutment tooth in the oral cavity. Adjustment method.
物用作業模型であって、少なくとも前記支台歯に対応す
る部分の色調が、前記歯冠修復物を口腔内の支台歯の上
に接着するために用いる不透明接着剤と同一であること
を特徴とする歯冠修復物用作業模型。2. A working model for a crown restoration having a portion corresponding to an abutment tooth, wherein the color tone of at least the portion corresponding to the abutment tooth is such that the crown restoration is an abutment tooth in the oral cavity. A working model for a crown restoration, characterized in that it is the same as the opaque adhesive used for bonding on top of.
が、歯肉と同一である請求項２記載の歯冠修復物用作業
模型。3. The working model for a crown restoration according to claim 2, wherein the color tone of the part of the working model corresponding to the gingiva is the same as that of the gingiva.
上に接着するために用いる不透明接着剤であって、作業
模型の前記支台歯に対応する部分と同一の色調を有する
歯冠修復物用接着剤。4. An opaque adhesive used for adhering a translucent crown restoration onto an abutment tooth in the oral cavity, which has the same color tone as that of a portion of the working model corresponding to the abutment tooth. An adhesive for a restoration having a crown.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3187685A JPH0531127A (en) | 1991-07-26 | 1991-07-26 | Color tone adjustment of crown restoration and working model and adhesive for crown restoration used therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3187685A JPH0531127A (en) | 1991-07-26 | 1991-07-26 | Color tone adjustment of crown restoration and working model and adhesive for crown restoration used therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0531127A true JPH0531127A (en) | 1993-02-09 |
Family
ID=16210356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3187685A Pending JPH0531127A (en) | 1991-07-26 | 1991-07-26 | Color tone adjustment of crown restoration and working model and adhesive for crown restoration used therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0531127A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023032728A1 (en) * | 2021-09-06 | 2023-03-09 | 株式会社トクヤマデンタル | Crown appearance color confirmation method, appliance kit, and appliance for demonstration |
-
1991
- 1991-07-26 JP JP3187685A patent/JPH0531127A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023032728A1 (en) * | 2021-09-06 | 2023-03-09 | 株式会社トクヤマデンタル | Crown appearance color confirmation method, appliance kit, and appliance for demonstration |
| JPWO2023032728A1 (en) * | 2021-09-06 | 2023-03-09 |
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