JPH0910231A - Production of tooth crown prosthetic appliance - Google Patents

Production of tooth crown prosthetic appliance

Info

Publication number
JPH0910231A
JPH0910231A JP19693195A JP19693195A JPH0910231A JP H0910231 A JPH0910231 A JP H0910231A JP 19693195 A JP19693195 A JP 19693195A JP 19693195 A JP19693195 A JP 19693195A JP H0910231 A JPH0910231 A JP H0910231A
Authority
JP
Japan
Prior art keywords
data
tooth
crown
shape data
crown shape
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
Application number
JP19693195A
Other languages
Japanese (ja)
Inventor
Yamahito Kogure
山人 小暮
Masaaki Negishi
政明 根岸
Hideki Ishizawa
秀樹 石澤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHIYUUKAI
Original Assignee
SHIYUUKAI
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SHIYUUKAI filed Critical SHIYUUKAI
Priority to JP19693195A priority Critical patent/JPH0910231A/en
Publication of JPH0910231A publication Critical patent/JPH0910231A/en
Pending legal-status Critical Current

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  • Dental Prosthetics (AREA)

Abstract

PURPOSE: To improve the fit of the margin line of an abutment tooth and a crown prosthetic appliance by forming the shape data between the max. built-up part of deformed crown shape data and the margin line obtd. from measurement data, forming the crown shape data fitting to the margin line and forming processing data. CONSTITUTION: The opposite teeth of the abutment tooth in the oral cavity and the tooth around the tooth are measured by a measuring means 2 and are inputted to a measuring data memory 7. A selecting means 9 compares and collates the abutment tooth from a surface model and the surface model of the tooth and crown shapes and selects a desired model. A margin fit curved surface forming means 12 forms the crown shape by forming the curved surface part consisting of the surface between the max. built-up part of the crown shape data deformed by a deforming means 10 and the margin line extracted by a margin line means 11. The processing data are formed by a processing data forming means 13 and the crown prosthetic appliance is produced by controlling the processing means 3.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明は、NCの切削加工、研削
加工又は光造形加工を行って歯冠補綴物を製作する方法
に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a dental prosthesis by performing NC cutting, grinding, or stereolithography.

【0002】[0002]

【従来の技術】クラウン、ブリッジ等の歯冠補綴物は埋
没鋳造法の原理を用いて製作されており、例えばクラウ
ン等歯冠補綴物の製作手順は、通法に従い支台歯形成
後、口腔内の前記支台歯およびその周囲と対合歯の印象
を採得し、咬合紙に咬合状態を記録する。次に歯科用硬
石膏を印象内に注入し分割歯型による作業模型を製作す
る。次に石膏模型の支台歯にマージンラインを描く。次
に咬合器および咬合紙を用いて作業模型上にワックスパ
ターンを形成する。この場合、マージンラインからワッ
クスがはみ出さないようにする。次にスプルーを設けて
耐火材で埋没する。次にワックスを焼成後、ワックスパ
ターン形状の空間にスプルーを通して溶融した金属を充
填し、冷却する。その後スプルーを取り除き、表面を研
摩して所望の歯冠補綴物を得る。ところで、上記製作方
法で得られたこの種補綴物の品質はその製作に携わる技
工士等技術力の負うところが大きく、技工士等の熟練度
の差により品質のバラッキがあり品質基準の設定が難し
い。近年三次元システムを用いて歯冠補綴物を製作する
方法の研究が進められ、これにより品質に対する技工士
等の熟練度の影響を軽減することにより品質の均一化を
確保できる傾向にある。三次元システムを用いて歯冠補
綴物を製作する方法は、、支台歯およびその周囲と対合
歯の印象を採得し、歯科用硬石膏を印象内に注入し硬化
させて作業模型を形成し、この作業模型の形状を三次元
測定技術により測定して治療した歯とその周囲のデータ
をコンピュータに格納し、そのデータから三次元モデル
を作製し、この三次元モデルにデータベースの中から選
択された一般的な補綴物形状を重ね合わせ、複製におい
て必要とされる形状と機能に適合するようにその一般的
な形状を変形し、この変形された形状のNCデータを作
成し、このNCデータによりフライス盤などのNC工作
機などを制御することにより歯冠補綴物を製作すものな
ど種々のものが提案されている。しかし、これらのもの
はいずれも支台歯と歯冠補綴物とのマージンラインの適
合が考慮されていない。
2. Description of the Related Art Crown prostheses such as crowns and bridges are manufactured by using the principle of the buried casting method. An impression of the abutment tooth inside and the surroundings and an opposing tooth is taken, and the occlusal state is recorded on an occlusal paper. Next, dental anhydrite is poured into the impression to make a working model with divided tooth molds. Next, draw a margin line on the abutment tooth of the plaster model. Next, a wax pattern is formed on the working model using an articulator and an articulating paper. In this case, make sure that the wax does not overflow from the margin line. Next, a sprue is provided and it is buried in a refractory material. Next, after burning the wax, the molten metal is filled into the space of the wax pattern shape through a sprue and cooled. The sprue is then removed and the surface is ground to give the desired prosthesis. By the way, the quality of this kind of prosthesis obtained by the above-mentioned manufacturing method is largely dependent on the technical skills of the technicians involved in its manufacturing, and the quality standards are difficult to set due to differences in technicians' skill levels . In recent years, research on a method for manufacturing a dental prosthesis by using a three-dimensional system has been advanced, and by doing so, it is apt to ensure uniform quality by reducing the influence of the skill level of a technician or the like on the quality. A method of manufacturing a crown prosthesis using a three-dimensional system is to take an impression of an abutment tooth and its surroundings and an opposing tooth, inject dental anhydrite into the impression and harden it to make a working model. The shape of this working model was measured by the three-dimensional measurement technology and the treated tooth and its surrounding data were stored in the computer, a three-dimensional model was created from the data, and this three-dimensional model was created from the database. The selected general prosthesis shape is overlaid, the general shape is deformed so as to match the shape and function required in the duplication, and NC data of this deformed shape is created. Various things have been proposed, such as one that manufactures a dental prosthesis by controlling an NC machine tool such as a milling machine based on data. However, none of them considers the matching of the margin line between the abutment tooth and the crown prosthesis.

【0003】[0003]

【発明が解決しようとする課題】上記従来技術において
は、支台歯と歯冠補綴物とのマージンラインの適合が悪
くなるという問題がある。
The above-mentioned prior art has a problem that the margin line between the abutment tooth and the crown prosthesis is poorly fitted.

【0004】そこで本発明は、支台歯と歯冠補綴物との
マージンラインの適合が良好な歯冠補綴物を製作する方
法を提供することを目的とする。
Therefore, it is an object of the present invention to provide a method for manufacturing a crown prosthesis in which the margin line between the abutment tooth and the crown prosthesis is well matched.

【0005】[0005]

【課題を解決するための手段】前記課題を解決するため
に本発明の歯冠補綴物の製作方法は、計測データに基づ
いてデータベースから所望の歯冠形状データを選択し、
かつ変形し、この歯冠形状データに基づいて加工データ
を作成し、この加工データよりNCの切削加工、研削加
工又は光造形加工を行って歯冠補綴物を製作する方法に
おいて、前記変形された歯冠形状データの最大豊隆部又
は最大豊隆部より下方部と前記計測データから得られた
マージンラインとの間の形状データを作成して、マージ
ンラインに適合する歯冠形状データを作成し、この歯冠
形状データから加工データを作成するものである。
In order to solve the above-mentioned problems, a method for manufacturing a dental prosthesis according to the present invention selects desired dental crown shape data from a database based on measurement data,
In addition, it is deformed, processing data is created based on this crown shape data, and in the method of manufacturing a dental prosthesis by performing NC cutting, grinding, or stereolithography from this processing data, Create the shape data between the maximum ridge of the crown shape data or the lower part of the maximum ridge and the margin line obtained from the measurement data to create crown shape data that fits the margin line. The processing data is created from the crown shape data.

【作用】本発明によれば、支台歯のマージンラインに合
わせた歯冠形状データが作成され、歯冠補綴物が製作さ
れる。
According to the present invention, the crown shape data matched with the margin line of the abutment tooth is created, and the crown prosthesis is manufactured.

【0006】[0006]

【実施例】以下、本発明の実施例を添付図面を参照して
説明する。図1は歯科用綴物を製作するために構成され
た装置の実施例であり、三次元CAD/CAM1と、計
測手段2と、NCによる工作機または光造形装置いわゆ
るレーザーリソグラフィーからなる加工手段3と、ディ
スプレイ4と、入力手段5からなっている。三次元CA
D/CAM1は歯冠形状データベース6と、計測データ
メモリ7と、モデル処理部8と、選択手段9と、変形手
段10と、マージン抽出手段11と、マージン適合曲面
形成手段12と、加工データ作成手段13より構成され
ており、モデル処理部8は計測手段2により得られた三
次元座標値計測データより歯牙欠損部位の周囲情報とな
るサーフェスモデルを作成し、マージン抽出手段11は
このサーフェスモデルからマージンラインを抽出する。
選択手段9は欠損部位とその周囲情報であるサーフェス
モデルと歯冠形状データベース6の歯冠形状データとを
比較照合し所望の歯冠形状データを選択する。変形手段
10は選択された歯冠形状データ16を比較した前記サ
ーフェスモデルに適合するように変形する。マージン適
合曲面形成手段12は変形された歯冠形状データの最大
豊隆部又はそれより下方部とマージンラインとの間のサ
ーフェスを形成してマージンラインに適合する歯冠形状
のサーフェスモデルを作成するものである。計測手段2
は計測データメモリ7に支台歯およびその周囲と対合歯
などの計測データを入力可能な適宜装置を用いることが
でき、例えば接触式又は非接触式の三次元測定機を用い
る場合は、従来通り支台形成された支台歯、窩洞形成さ
れた支台歯またはコア形成された支台歯およびその周囲
と対合歯の印象を採得し、歯科用硬石膏を印象内に注入
し硬化させて作業模型を形成し、この作業模型の形状を
三次元測定機により測定して計測データメモリ7に格納
する。この場合、計測データは点列データをワイヤーフ
レーム化しスムージング処理を施したデータとして格納
するのが望ましい。CTスキャンを用いる場合も同様に
前記作業模型を通法により測定した三次元データとして
計測データメモリ7に格納する。歯冠形状データベース
6には例えば多種標準モデルの模型を作成し、これを上
述した三次元の計測手段により計測して三次元座標値デ
ータを得、この三次元座標値データに基づき三次元CA
D/CAMを用いて通法により作成されたサーフェスモ
デルなどの形状データが格納されている。そしてこの歯
冠形状データは、前歯、臼歯の区別、上下左右の区別、
さらに第1小臼歯、第2小臼歯、第1大臼歯、第2大臼
歯、第3大臼歯などの歯牙種類別にグループ化されて保
存され、歯牙情報を入力することにより所望のグループ
を読み出し可能になっている。また歯冠形状データは図
3に示すように咬頭部14から最大豊隆部15までの歯
冠形状16として作成されている。本実施例ではディス
プレイ4の表示内容との対話方式で操作するもので、例
えばクラウンの製作手順は、図6,図9に示すように歯
を治療した後、その歯を削って支台歯17を形成し、口
腔内の前記支台歯17およびその周囲の歯18,19と
対向歯20,21,22を計測手段2により計測して計
測データメモリ7に入力する。また入力手段5により欠
損部位の属性データ、例えば右下第1大臼歯であること
などを入力する。次にモデル処理部8は計測データから
ワイヤフレームモデルを作成し、このモデルからサーフ
ェイスモデルからなる支台歯17,歯18,19,2
0,21,22を作成する。またマージン抽出手段11
は支台歯17からマージンライン23を抽出する。選択
手段9は図6,図9に示すようにサーフェスモデルから
なる支台歯17、歯18,19,20,21,22と歯
冠形状のサーフェスモデル16とを比較照合し所望のモ
デル16を選択し、変形手段10は選択されたモデルを
上記サーフェスモデルに合わせて拡大又は縮小あるいは
回転するものである。マージン適合曲面形成手段12は
図4,図7,図10に示すように変形された歯冠形状デ
ータ16の最大豊隆部15とマージンライン23の間に
サーフェスからなる曲面部24を作成して図5,図8,
図11に示すようにマージンライン23に適合する歯冠
形状データ16Aを作成し、加工データ作成手段13に
より加工データを作成し、加工手段3を制御することに
より歯冠補綴物を製作する。この場合、マージン適合曲
面形成手段12は例えばマージンライン23と最大豊隆
部15とを選択してこの間のサーフェス形成を実行する
ものであり、マージン抽出手段11は例えば支台歯17
の形状データからマージンに相当する点を選択してこの
点によるワイヤーフレーム形成を実行する。歯冠形状デ
ータベース6に登録する形状データを当該患者の欠損前
の歯牙を計測した形状データにすることにより変形手段
10による変形量を少なくできる、また、歯冠形状デー
タは図12に示すように最大豊隆部15より下方まで延
出形成したものでもよく、この場合は延出端15Aとマ
ージンライン23との間に曲面を形成する。このよう
に、本実施例においては計測データから得られたマージ
ンラインと選択された歯冠形状データとに基づきマージ
ンに適合する歯冠形状データを形成できるため、マージ
ンに適合した歯冠補綴物を容易に製作できる。なお本発
明は上記実施例に限定されるものではなく本発明の要旨
の範囲内において種々の変形実施が可形状データはサー
フェスを説明たがソリッドなどでもよい。また、本発明
でいう支台歯とは、支台形成された支台歯、窩洞形成さ
れた支台歯またはコア形成された支台歯をいう。
Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows an embodiment of an apparatus configured for manufacturing a dental binding, which includes a three-dimensional CAD / CAM 1, a measuring means 2, and a machining tool 3 by NC such as a machine tool or stereolithography apparatus, so-called laser lithography. And a display 4 and an input means 5. Three-dimensional CA
The D / CAM 1 has a crown shape database 6, a measurement data memory 7, a model processing unit 8, a selecting unit 9, a deforming unit 10, a margin extracting unit 11, a margin conforming curved surface forming unit 12, and processing data creation. The model processing unit 8 creates a surface model serving as peripheral information of the tooth defect site from the three-dimensional coordinate value measurement data obtained by the measuring unit 2, and the margin extracting unit 11 uses the surface model. Extract the margin line.
The selection means 9 compares and collates the defective portion and the surface model, which is the surrounding information, with the crown shape data of the crown shape database 6 and selects the desired crown shape data. The deforming means 10 deforms the selected crown shape data 16 so as to fit the surface model that has been compared. The margin conforming curved surface forming means 12 forms a surface between the margin line and the maximum ridge portion or the lower portion of the deformed crown shape data to create a crown-shaped surface model conforming to the margin line. Is. Measuring means 2
Can use an appropriate device capable of inputting measurement data such as an abutment tooth and its surroundings and a counter tooth to the measurement data memory 7. For example, when a contact type or non-contact type three-dimensional measuring machine is used, Take an impression of an abutment tooth with a street abutment, an abutment tooth with a cavity, or an abutment tooth with a core and its surroundings and an opposing tooth, and inject dental anhydrite into the impression to cure it. Then, the working model is formed, and the shape of the working model is measured by the coordinate measuring machine and stored in the measurement data memory 7. In this case, it is desirable that the measurement data be stored as data in which point sequence data is wireframed and smoothed. Similarly, when using a CT scan, the working model is also stored in the measurement data memory 7 as three-dimensional data measured by the conventional method. In the crown shape database 6, for example, a model of various standard models is created, this is measured by the above-mentioned three-dimensional measuring means to obtain three-dimensional coordinate value data, and the three-dimensional CA is based on this three-dimensional coordinate value data.
Shape data such as a surface model created by a conventional method using D / CAM is stored. And this crown shape data is used to distinguish front teeth, posterior teeth, top and bottom, left and right,
Further, the first premolar, the second premolar, the first molar, the second molar, the third molar, etc. are grouped and stored according to the tooth type, and the desired group can be read by entering the tooth information. It has become. Further, as shown in FIG. 3, the crown shape data is created as a crown shape 16 from the cusp 14 to the maximum ridge 15. In the present embodiment, the operation is performed in an interactive manner with the display contents of the display 4. For example, in the manufacturing procedure of the crown, after the tooth is treated as shown in FIG. 6 and FIG. Is formed, and the abutment tooth 17 in the oral cavity, the teeth 18 and 19 around it, and the opposing teeth 20, 21 and 22 are measured by the measuring means 2 and input to the measurement data memory 7. Further, the input means 5 inputs attribute data of the defective portion, for example, the lower right first molar. Next, the model processing unit 8 creates a wire frame model from the measurement data, and from this model, an abutment tooth 17, a tooth 18, 19, 2 composed of a surface model.
Create 0, 21, 22. Further, the margin extracting means 11
Extracts the margin line 23 from the abutment tooth 17. As shown in FIGS. 6 and 9, the selection means 9 compares and compares the abutment tooth 17, the teeth 18, 19, 20, 21, and 22 formed of the surface model with the crown-shaped surface model 16 to obtain the desired model 16. The selecting and transforming means 10 enlarges or reduces or rotates the selected model according to the surface model. The margin conforming curved surface forming means 12 creates a curved surface portion 24 composed of a surface between the maximum ridge portion 15 and the margin line 23 of the transformed crown shape data 16 as shown in FIGS. 4, 7 and 10. 5, Figure 8,
As shown in FIG. 11, the crown shape data 16A that fits the margin line 23 is created, the processing data creation means 13 creates the processing data, and the processing means 3 is controlled to manufacture the dental prosthesis. In this case, the margin conforming curved surface forming means 12 selects, for example, the margin line 23 and the maximum ridge portion 15 and executes the surface formation therebetween, and the margin extracting means 11 makes the abutment tooth 17 for example.
A point corresponding to the margin is selected from the shape data of and the wire frame formation is executed by this point. The amount of deformation by the deforming means 10 can be reduced by using the shape data registered in the crown shape database 6 as the shape data obtained by measuring the teeth of the patient before the loss, and the shape data of the crown is as shown in FIG. It may be formed so as to extend below the maximum bulge portion 15, and in this case, a curved surface is formed between the extension end 15A and the margin line 23. As described above, in the present embodiment, the crown shape data conforming to the margin can be formed based on the margin line obtained from the measurement data and the selected crown shape data. Easy to make. Note that the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the gist of the present invention. The surface has been described as the shape data, but it may be a solid or the like. Further, the abutment tooth in the present invention means an abutment tooth having an abutment, an abutment tooth having a cavity, or an abutment tooth having a core.

【0007】[0007]

【発明の効果】本発明はマージンに適合した歯冠補綴物
を製作可能な方法を提供できる。
Industrial Applicability The present invention can provide a method capable of manufacturing a crown-shaped prosthesis that fits a margin.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の実施例を示すブロック図である。FIG. 1 is a block diagram showing an embodiment of the present invention.

【図2】フローチャート図である。FIG. 2 is a flowchart.

【図3】歯冠形状データを示す概略説明図である。FIG. 3 is a schematic explanatory view showing tooth crown shape data.

【図4】歯冠形状データをを示す概略説明図である。FIG. 4 is a schematic explanatory view showing tooth crown shape data.

【図5】歯冠形状データを示す概略説明図である。FIG. 5 is a schematic explanatory view showing tooth crown shape data.

【図6】歯冠形状データ作成状態を示す概略説明図であ
る。
FIG. 6 is a schematic explanatory diagram showing a state of creating tooth crown shape data.

【図7】歯冠形状データ作成状態を示す概略説明図であ
る。
FIG. 7 is a schematic explanatory view showing a state of creating tooth crown shape data.

【図8】歯冠形状データ作成状態を示す概略説明図であ
る。
FIG. 8 is a schematic explanatory view showing a state of creating tooth crown shape data.

【図9】歯冠形状データ作成状態を示す概略説明図であ
る。
FIG. 9 is a schematic explanatory diagram showing a state of creating tooth crown shape data.

【図10】歯冠形状データ作成状態を示す概略説明図で
ある。
FIG. 10 is a schematic explanatory view showing a state of creating tooth crown shape data.

【図11】歯冠形状データ作成状態を示す概略説明図で
ある。
FIG. 11 is a schematic explanatory view showing a state of creating tooth crown shape data.

【図12】歯冠形状データを示す概略説明図である。FIG. 12 is a schematic explanatory view showing tooth crown shape data.

【符号の説明】[Explanation of symbols]

2 計測手段 3 加工手段 6 歯冠形状データベース 9 選択手段 10変形手段 11 マージン適合曲面形成手段 2 measuring means 3 processing means 6 crown shape database 9 selecting means 10 deforming means 11 margin conforming curved surface forming means

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】計測データに基づいてデータベースから所
望の歯冠形状データを選択し、かつ変形し、この歯冠形
状データに基づいて加工データを作成し、この加工デー
タによりNCの切削加工、研削加工又は光造形加工を行
って歯冠補綴物を製作する方法において、前記変形され
た歯冠形状データの最大豊隆部又は最大豊隆部より下方
部と前記計測データから得られたマージンラインとの間
の形状データを作成して、マージンラインに適合する歯
冠形状データを作成し、この歯冠形状データから加工デ
ータを作成することを特徴とする歯冠補綴物の製作方
法。
1. A desired crown shape data is selected from a database based on measurement data and deformed, processing data is created based on this crown shape data, and NC cutting and grinding are performed by this processing data. In the method of manufacturing a crown prosthesis by performing working or stereolithography, between the maximum ridge portion of the deformed crown shape data or a portion below the maximum ridge portion and a margin line obtained from the measurement data. The method for producing a dental prosthesis is characterized in that the dental crown shape data that conforms to the margin line is created, and the machining data is created from the dental crown shape data.
JP19693195A 1995-06-28 1995-06-28 Production of tooth crown prosthetic appliance Pending JPH0910231A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19693195A JPH0910231A (en) 1995-06-28 1995-06-28 Production of tooth crown prosthetic appliance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19693195A JPH0910231A (en) 1995-06-28 1995-06-28 Production of tooth crown prosthetic appliance

Publications (1)

Publication Number Publication Date
JPH0910231A true JPH0910231A (en) 1997-01-14

Family

ID=16366048

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19693195A Pending JPH0910231A (en) 1995-06-28 1995-06-28 Production of tooth crown prosthetic appliance

Country Status (1)

Country Link
JP (1) JPH0910231A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0872389A2 (en) 1997-04-18 1998-10-21 Toyota Jidosha Kabushiki Kaisha Air bag apparatus for passenger seat
DE102017208951A1 (en) 2016-05-30 2017-11-30 Fujitsu Limited Tooth axis estimation program, tooth axis estimation device and method thereto, tooth profile data generation program, tooth profile data generation device and methods thereof
KR20170135731A (en) 2016-05-30 2017-12-08 후지쯔 가부시끼가이샤 Tooth type judgment program, crown position judgment device and method of the same
US10285781B2 (en) 2015-03-09 2019-05-14 Fujitsu Limited Method for acquiring tooth crown shape information from data relating to oral cavity shape to automatically construct a database for tooth crown shapes

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0872389A2 (en) 1997-04-18 1998-10-21 Toyota Jidosha Kabushiki Kaisha Air bag apparatus for passenger seat
US10285781B2 (en) 2015-03-09 2019-05-14 Fujitsu Limited Method for acquiring tooth crown shape information from data relating to oral cavity shape to automatically construct a database for tooth crown shapes
DE102017208951A1 (en) 2016-05-30 2017-11-30 Fujitsu Limited Tooth axis estimation program, tooth axis estimation device and method thereto, tooth profile data generation program, tooth profile data generation device and methods thereof
KR20170135731A (en) 2016-05-30 2017-12-08 후지쯔 가부시끼가이샤 Tooth type judgment program, crown position judgment device and method of the same
US10262417B2 (en) 2016-05-30 2019-04-16 Fujitsu Limited Tooth axis estimation program, tooth axis estimation device and method of the same, tooth profile data creation program, tooth profile data creation device and method of the same
DE102017208951B4 (en) 2016-05-30 2022-11-17 Fujitsu Limited Tooth axis estimation program, tooth axis estimation device and method thereof, tooth profile data generation program, tooth profile data generation device and method thereof

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