JP2010119420A

JP2010119420A - Artificial tooth and method of manufacturing the same

Info

Publication number: JP2010119420A
Application number: JP2008293028A
Authority: JP
Inventors: Fumio Sugata; 文雄菅田; Akitsugu Segawa; 彰継瀬川; Hiroshi Kado; 寛嘉戸; Seiji Hamano; 誠司濱野
Original assignee: Panasonic Corp
Current assignee: Panasonic Corp
Priority date: 2008-11-17
Filing date: 2008-11-17
Publication date: 2010-06-03

Abstract

<P>PROBLEM TO BE SOLVED: To improve the adhesion between an artificial tooth body and its surface layer, in the artificial tooth and a method of manufacturing the same. <P>SOLUTION: This artificial tooth includes the cylindrical artificial tooth body 4 having one end opened, and the surface layer 4a covering the artificial tooth body 4; a facing side face of the artificial tooth body 4 has spiral cutting grooves 8. The manufacturing method includes: rotating a columnar ceramic body 5, with a cutting blade 6 pushed towards the central part of the tip of the ceramic body 5; sequentially moving the cutting blade 6 to the outer peripheral side of the ceramic body 5 and in the rear end direction; next, sequentially moving the cutting blade 6 to the central side and in the rear end direction; then, separating a piece of the artificial tooth body 4 from the ceramic body 5; and forming the surface layer 4a on the surface of the separated artificial tooth body 4. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、義歯とその製造方法に関するものである。 The present invention relates to a denture and a manufacturing method thereof.

従来の義歯は、例えば図６に示すような製造方法により形成していた。 Conventional dentures are formed by a manufacturing method as shown in FIG. 6, for example.

すなわち、柱状のセラミック体１の先端部分に切削刃（図示せず）を押し当て、このセラミック体１の長手方向に直交する方向に、前記切削刃をこの図６の矢印のごとく移動させ、これにより、義歯体２を形成していた。つまり、切削刃による水平加工により、義歯体２を形成していたのである。 That is, a cutting blade (not shown) is pressed against the tip of the columnar ceramic body 1, and the cutting blade is moved in the direction perpendicular to the longitudinal direction of the ceramic body 1 as shown by the arrows in FIG. Thus, the denture body 2 was formed. That is, the denture body 2 was formed by horizontal processing with a cutting blade.

その後、この義歯体２をセラミック体１から個片へと分離し、その表面に表面層を形成することで、完成品としていた（例えば下記特許文献１）。
特開平７−１３８１２３号公報 Thereafter, the denture body 2 was separated from the ceramic body 1 into individual pieces, and a surface layer was formed on the surface thereof to obtain a finished product (for example, Patent Document 1 below).
JP 7-138123 A

上記従来例における課題は、個片の義歯体２とその表面層との密着性が低いと言うことであった。 The problem in the above conventional example is that the adhesion between the individual denture body 2 and its surface layer is low.

すなわち、上記のような切削刃による水平加工では、図７に示すごとく、義歯体２には、その対向する一側面（先端側と後端側）には、年輪状の切削溝が形成され、また、対向する他側面（前側と後ろ側）には、図６に示すような平行状の切削溝が形成されている。 That is, in the horizontal machining with the cutting blade as described above, as shown in FIG. 7, the denture body 2 is formed with annual ring-shaped cutting grooves on the opposing side surfaces (front end side and rear end side), Further, parallel cutting grooves as shown in FIG. 6 are formed on the opposite other side surfaces (front side and rear side).

従って、このような切削溝が形成された義歯体２の表面に表面層を形成する場合、この表面層は、上記切削溝に噛み合いにくく、よって、個片の義歯体２とその表面層との密着性が低くなってしまうのであった。 Therefore, when a surface layer is formed on the surface of the denture body 2 having such a cutting groove, the surface layer is unlikely to mesh with the cutting groove, and therefore, the individual denture body 2 and its surface layer Adhesion would be reduced.

この点を今少し具体的に説明すると、表面層に、図６、図７における上方側に向けての力が加わった場合、それを切削溝で噛み合うことで阻止する力が弱く、その結果として、個片の義歯体２とその表面層との密着性が低くなってしまうのであった。 This point will be explained more specifically. When a force directed upward in FIGS. 6 and 7 is applied to the surface layer, the force that prevents it from engaging with the cutting groove is weak, and as a result, The adhesion between the individual denture body 2 and its surface layer is reduced.

そこで本発明は、義歯体とその表面層との密着性を高くすることを目的とするものである。 Then, this invention aims at making the adhesiveness of a denture body and its surface layer high.

そして、この目的を達成するために本発明は、一端が開口した筒状の義歯体と、この義歯体を覆った表面層とを備え、前記義歯体の対向する一側面には、渦巻き状の切削溝を設け、これにより所期の目的を達成するものである。 In order to achieve this object, the present invention comprises a cylindrical denture body with one end opened, and a surface layer covering the denture body, and one side surface of the denture body has a spiral shape. Cutting grooves are provided to achieve the intended purpose.

以上のように本発明は、一端が開口した筒状の義歯体と、この義歯体を覆った表面層とを備え、前記義歯体の対向する一側面には、渦巻き状の切削溝を設けたものであるので、義歯体とその表面層との密着性を高くすることができるものである。 As described above, the present invention includes a cylindrical denture body with one end opened and a surface layer covering the denture body, and spiral cutting grooves are provided on one side surface of the denture body facing each other. Therefore, the adhesion between the denture body and its surface layer can be increased.

すなわち、本発明においては、前記義歯体の対向する一側面には、渦巻き状の切削溝を設けたものであるので、表面層は、この対向する一側面に設けた渦巻き状の切削溝に噛み合うこととなり、その結果として、義歯体とその表面層との密着性を高くすることができるものである。 That is, in the present invention, spiral cutting grooves are provided on one opposing side surface of the denture body, so that the surface layer meshes with the spiral cutting grooves provided on the opposing one side surface. As a result, the adhesion between the denture body and its surface layer can be increased.

以下、本発明の一実施形態を添付図面を用いて説明する。 Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

図１において３は義歯で、この義歯３は、図２、図４に示す義歯体４の表面にセラミックなどの表面層４ａを設けて形成したものである。 In FIG. 1, 3 is a denture, and this denture 3 is formed by providing a surface layer 4a such as ceramic on the surface of the denture body 4 shown in FIGS.

義歯体４は、図３に示す方法で製造される。 The denture body 4 is manufactured by the method shown in FIG.

すなわち、特開２００６−２７１４３５号公報の段落００１９に示されたセラミック製の柱状のセラミック体５を、この図３に示す切削刃６で切削することで、製造したものである。 That is, the ceramic columnar ceramic body 5 shown in paragraph 0019 of JP-A-2006-271435 is manufactured by cutting with the cutting blade 6 shown in FIG.

具体的には、この図３に示すように、柱状のセラミック体５の先端の中部に、切削刃６を押しつけた状態で、このセラミック体５を回転させるとともに、前記切削刃６をこのセラミック体５の外周側へ、かつ後端方向へと順次移動させ、次に、この切削刃６を中部側へ、かつ後端方向へと順次移動させると、図２、図４に示すような義歯体４が形成される。 Specifically, as shown in FIG. 3, while the cutting blade 6 is pressed against the middle portion of the columnar ceramic body 5, the ceramic body 5 is rotated and the cutting blade 6 is moved to the ceramic body. When the cutting blade 6 is sequentially moved toward the outer peripheral side and toward the rear end, and then the cutting blade 6 is sequentially moved toward the middle side and toward the rear end, the denture body as shown in FIGS. 4 is formed.

なおこの時まだ、図３、図４に示すように、義歯体４と柱状のセラミック体５とは支え部７によって連結されている。 At this time, as shown in FIGS. 3 and 4, the denture body 4 and the columnar ceramic body 5 are connected by the support portion 7.

従って、この状態で図５に示すごとく、義歯体４を仰向け状態とし、この状態で義歯体４の上方から、たとえば、ドリル形状の他の切削歯（図示せず）で掘り込み作業を行い、これにより、義歯体４を一端が開口した図１のような筒状とし、その後、この筒状の義歯体４をセラミック体５から分離する。 Therefore, in this state, as shown in FIG. 5, the denture body 4 is placed in a supine state, and in this state, for example, excavation work is performed with other cutting teeth (not shown) in the shape of a drill, Thereby, the denture body 4 is formed into a cylindrical shape as shown in FIG. 1 with one end opened, and then the cylindrical denture body 4 is separated from the ceramic body 5.

このように分離された義歯体４には、その対向する一側面（そのセラミック体５の先端側と後端側）には、図２のごとく、連続する渦巻き状の切削溝８が形成され、また、対向する他側面（前面側と後面側）には、図４に示すように、平行状の切削溝９が形成されている。 In the denture body 4 separated in this way, continuous spiral cutting grooves 8 are formed on one side surface (the front end side and the rear end side of the ceramic body 5) as shown in FIG. Moreover, as shown in FIG. 4, the parallel cutting groove 9 is formed in the other side surface (front side and rear surface side) which opposes.

従って、義歯体４の表面にセラミックよりなる表面層４ａを形成する場合、特に先端側と後端側の渦巻き状の切削溝８は、表面層４ａが図１、図２の上方側にずれようとするのを渦巻きの上線８ａ、下線８ｂが効果的に噛み合うことで阻止し、その結果として、義歯体４の表面に対する表面層４ａの密着性が極めて高くなる。 Accordingly, when the surface layer 4a made of ceramic is formed on the surface of the denture body 4, the surface layer 4a is shifted upward in FIGS. 1 and 2 particularly in the spiral cutting grooves 8 on the front end side and the rear end side. Is prevented by effectively meshing the upper line 8a and the lower line 8b of the spiral, and as a result, the adhesion of the surface layer 4a to the surface of the denture body 4 becomes extremely high.

なお、表面層４ａは、液状体を義歯体４の表面に付着後、焼成して一体化するものであり、上述のごとく渦巻きの上線８ａ、下線８ｂが効果的に噛み合っているので、この焼成時において、表面層４ａが収縮するのを効果的に抑制し、これによって表面層４ａとしての出来栄えも極めて美しい仕上がりとなり、義歯としての評価も高いものとなる。 The surface layer 4a is formed by adhering the liquid material to the surface of the denture body 4 and then firing and integrating. As described above, the upper line 8a and the lower line 8b of the spiral are effectively meshed with each other. In some cases, the surface layer 4a is effectively prevented from shrinking, and as a result, the surface layer 4a has a very beautiful finish and is highly evaluated as a denture.

従って、義歯としての活用が大いに期待されるものである。 Therefore, the use as a denture is greatly expected.

本発明の一実施形態にかかる義歯の斜視図The perspective view of the denture concerning one Embodiment of this invention その義歯体の側面図Side view of the denture body 本発明の一実施形態の製造方法を示す正面図The front view which shows the manufacturing method of one Embodiment of this invention その一部正面図Partial front view 本発明の一実施形態の製造方法を示す斜視図The perspective view which shows the manufacturing method of one Embodiment of this invention 従来例の斜視図Perspective view of conventional example 従来例の側面図Side view of conventional example

Explanation of symbols

１セラミック体
２義歯体
３義歯
４義歯体
４ａ表面層
５セラミック体
６切削刃
７支え部
８渦巻き状の切削溝
８ａ渦巻きの上線
８ｂ渦巻きの下線
９平行状の切削溝 DESCRIPTION OF SYMBOLS 1 Ceramic body 2 Denture body 3 Denture 4 Denture body 4a Surface layer 5 Ceramic body 6 Cutting blade 7 Support part 8 Spiral cutting groove 8a Spiral upper line 8b Spiral underline 9 Parallel cutting groove

Claims

A denture provided with a cylindrical denture body having one end opened and a surface layer covering the denture body, and provided with spiral cutting grooves on one opposing side surface of the denture body.

The denture according to claim 1, wherein a parallel cutting groove is provided on the opposite side surface of the denture body.

With the cutting blade pressed against the middle of the tip of the columnar ceramic body, the ceramic body is rotated, and the cutting blade is sequentially moved toward the outer peripheral side of the ceramic body and toward the rear end. The cutting blade is sequentially moved toward the middle side and toward the rear end, and then the individual denture body is separated from the ceramic body, and then a surface layer is formed on the surface of the separated denture body. A method for manufacturing a denture.

Prior to separating the denture body from the ceramic body, the denture body is dug into the denture body, thereby forming the denture body into a cylindrical shape with one end open, and then separating the cylindrical denture body from the ceramic body. Item 4. A method for producing a denture according to Item 3.