JPH0659288B2 - Dental magnet body - Google Patents
Dental magnet bodyInfo
- Publication number
- JPH0659288B2 JPH0659288B2 JP7327386A JP7327386A JPH0659288B2 JP H0659288 B2 JPH0659288 B2 JP H0659288B2 JP 7327386 A JP7327386 A JP 7327386A JP 7327386 A JP7327386 A JP 7327386A JP H0659288 B2 JPH0659288 B2 JP H0659288B2
- Authority
- JP
- Japan
- Prior art keywords
- magnet
- case
- dental
- magnet body
- rare earth
- 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.)
- Expired - Lifetime
Links
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 14
- 150000002910 rare earth metals Chemical class 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 5
- 239000007769 metal material Substances 0.000 claims description 5
- 239000000696 magnetic material Substances 0.000 claims description 4
- 229910001172 neodymium magnet Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000000465 moulding Methods 0.000 description 3
- 229910020630 Co Ni Inorganic materials 0.000 description 2
- 229910002440 Co–Ni Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910001004 magnetic alloy Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 210000003456 pulmonary alveoli Anatomy 0.000 description 1
- 210000003296 saliva Anatomy 0.000 description 1
Landscapes
- Dental Preparations (AREA)
- Magnetic Treatment Devices (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は歯茎内に埋設した例えばＰｄ−Ｃｏ−Ｎｉ合金
等の磁性材料からなる根面板に，義歯を磁気吸引力によ
って密着固定するために義歯床内に埋設する希土類磁石
からなる歯科用磁石に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention is intended for closely fixing a denture to a root plate made of a magnetic material such as Pd-Co-Ni alloy embedded in the gum by magnetic attraction. The present invention relates to a dental magnet made of a rare earth magnet embedded in a denture base.
近年歯科用補綴技術の分野において，希土類磁石相互間
若しくは希土類磁石と歯科用磁性合金との間の吸引力を
利用して義歯を固定維持する技術が開発され，実用化の
域に到達しようとしている。すなわちこのような発想は
比較的古くから存在し，義歯の挿入および除去が容易で
あると共に，隣接する支持歯に対する側圧が小さい等の
利点があるためである。しかも最近極めて強力な希土類
磁石，例えばＳｍ−Ｃｏ系磁石，Ｎｄ−Ｆｅ−Ｂ系磁石
等の出現により，極めて小型の磁石によって義歯の維持
が行えるようになったことによるものである。In recent years, in the field of dental prosthesis technology, a technique for fixing and maintaining a denture by utilizing attractive force between rare earth magnets or between a rare earth magnet and a dental magnetic alloy has been developed, and is about to reach a practical stage. . This is because such an idea has existed for a relatively long time, and it is easy to insert and remove a denture, and there is an advantage that a lateral pressure on an adjacent supporting tooth is small. Moreover, due to the emergence of extremely strong rare earth magnets such as Sm-Co magnets and Nd-Fe-B magnets, it has become possible to maintain dentures with extremely small magnets.
第１図は上記のような義歯の一例を模式的に示す縦断面
図である。同図において歯槽１内の根２には，例えばＰ
ｄ−Ｃｏ−Ｎｉ合金からなる根面板３を埋設する。次に
４は義歯床であり，上部に義歯５を突設すると共に，前
記根面板３と対向して磁石６を，例えば義歯床４の下表
面から0.2mmの位置に埋設する。磁石６は例えばＳｍ−
Ｃｏ系磁石により，直径4.0mm厚さ1.5mmの円板状に形成
する。而して磁石６を前記根面板３と対向させて義歯床
４を歯槽１の根２に嵌着すれば，磁石６と根面板３との
間の吸引力によって義歯床４を固定維持することができ
るのである。この場合，磁石６と根面板３との間隔が小
さい程両者間に作用する固定維持力を大きくすることが
できる。従って厚さ0.2〜0.3mmのレジンケース内に予め
磁石６を収納し，これを成形型中に設置して義歯床４成
形用のレジンを注入固化する手段を採用していた。FIG. 1 is a vertical sectional view schematically showing an example of the above-described artificial tooth. In the figure, the root 2 in the alveolar 1 has, for example, P
A root plate 3 made of a d-Co-Ni alloy is embedded. Next, a denture base 4 is provided with a denture 5 protruding from the upper part thereof, and a magnet 6 is embedded facing the root plate 3 at a position of 0.2 mm from the lower surface of the denture base 4, for example. The magnet 6 is, for example, Sm-
A Co magnet is used to form a disc with a diameter of 4.0 mm and a thickness of 1.5 mm. If the denture base 4 is fitted to the root 2 of the alveolar 1 with the magnet 6 facing the root plate 3, the denture base 4 can be fixed and maintained by the attractive force between the magnet 6 and the root plate 3. Can be done. In this case, the smaller the space between the magnet 6 and the root plate 3 is, the larger the fixing maintenance force acting between the two can be. Therefore, the magnet 6 is housed in a resin case having a thickness of 0.2 to 0.3 mm in advance, and the magnet 6 is installed in a molding die to inject and solidify the resin for molding the denture base 4.
上記のようにして形成した義歯床４は，磁石６を収納す
るレジンケース（図示せず）が根面板３と直接接触する
ため，使用中に摩耗して薄くなり，甚だしきは破損して
穴があいて磁石６が露出することがある。このような状
態においては磁石６に唾液その他が侵入し，磁石６が黒
変若しくは腐食することとなり，磁力の低下更には破損
の危険がある。The denture base 4 formed as described above is worn and thinned during use because the resin case (not shown) for housing the magnet 6 is in direct contact with the root plate 3, and the crevice is damaged and the holes are The magnet 6 may be exposed and exposed. In such a state, saliva or the like penetrates into the magnet 6 and the magnet 6 is blackened or corroded, and there is a risk of a decrease in magnetic force and further damage.
本発明は上記問題点を解決し，耐摩耗性および耐腐食性
の優れた歯科用磁石体を提供することを目的とするもの
である。It is an object of the present invention to solve the above problems and provide a dental magnet body having excellent wear resistance and corrosion resistance.
上記問題点を解決するため，本発明においては， Ａ．歯槽内に埋設した磁性材料からなる根面板と対向す
るように義歯床内に埋設する板状に形成した希土類磁石
からなる歯科用磁石体において。In order to solve the above problems, in the present invention, A. A dental magnet body made of a rare earth magnet formed in a plate shape to be embedded in a denture base so as to face a root plate made of a magnetic material embedded in an alveolus.
Ｂ．前記希土類磁石を非磁性金属材料からなるケース内
に希土類磁石端面とケース底面とを密着して収納する。B. The rare earth magnet is housed in a case made of a non-magnetic metal material in close contact with the end surface of the rare earth magnet and the bottom surface of the case.
Ｃ．ケース底面を前記根面板と対向して配設する。C. The bottom surface of the case is arranged so as to face the root plate.
Ｄ．前記ケースを縦断面形状を略Ｕ字形に形成する。D. The case is formed to have a substantially U-shaped vertical cross section.
Ｅ．ケースの開放端縁に係止用の突起を設ける。E. A locking protrusion is provided on the open edge of the case.
という技術的手段を採用したのである。It adopted the technical means.
本発明においてケース底部の厚さが0.1mm未満では耐摩
耗性が不足するため不都合であり，一方0.3mmを越える
と，磁石と根面板との間隔が大きすぎて吸引力を減退す
るため固定維持力が低下する。従って0.1〜0.3mmとする
のがよい。In the present invention, when the thickness of the bottom of the case is less than 0.1 mm, it is inconvenient because the wear resistance is insufficient. On the other hand, when it exceeds 0.3 mm, the distance between the magnet and the root plate is too large and the attraction force is reduced, so that fixing is maintained. The power decreases. Therefore, it is better to set it to 0.1 to 0.3 mm.
またケースの開放端縁に設ける係止用の突起は，ケース
側面外方に0.1mm以上突出させないと，係止作用が不足
するため不都合である。In addition, the locking projection provided on the open edge of the case is inconvenient because the locking action is insufficient unless it is projected more than 0.1 mm outside the side surface of the case.
希土類磁石を非磁性金属材料からなるケース内に収納し
た状態で義歯床内に埋設することによって，歯科用磁石
体の耐摩耗性および耐食性を大幅に向上する作用があ
る。この場合ケースを非磁性金属材料で形成してあるか
ら，磁石と根面板との間に作用する磁界には全く影響が
なく，吸引力は正常に作用する。またケースの開放端縁
に係止用の突起を設けたことにより，義歯床内への埋設
固着が充分に確保されると共に，根面板とケース底面と
の密着状態も充分に保証されるのである。By embedding a rare earth magnet in a denture base while being housed in a case made of a non-magnetic metal material, it has the effect of significantly improving the wear resistance and corrosion resistance of the dental magnet body. In this case, since the case is made of a non-magnetic metal material, there is no influence on the magnetic field acting between the magnet and the root plate, and the attractive force acts normally. In addition, by providing a locking projection on the open edge of the case, it is possible to secure sufficient embedding and fixing in the denture base, and also to ensure the close contact between the root plate and the case bottom. .
第２図は本発明の実施例を示す拡大縦断面図である。同
図において７はケースであり，例えばステンレス鋼等の
非磁性金属材料によって，帽子状若しくは縦断面形状を
略Ｕ字形に形成する。而してケース７の開放端縁には係
止用の突起８を設ける。次にケース７内に円板状に形成
したＳｍ−Ｃｏからなる磁石６を収納する。この場合磁
石６の端縁部に丸みを設けるとケース７との密着性を向
上させることができる。また磁石６とケース７との間に
は接着剤を介在させて一体に接着する。次に上記のよう
に形成した歯科用磁石体９を第１図に示す義歯床４を形
成すべき成形型内にケース７底面が根面板３と対向する
ように配設し，成形用レジンを注入固化するのである。
而してケース７の開放端縁に設けた突起８が前記成形用
レジン中に係止することによって，前記歯科用磁石体９
の義歯床４内への固着が確実になるのである。FIG. 2 is an enlarged vertical sectional view showing an embodiment of the present invention. In the figure, reference numeral 7 denotes a case, which is made of a non-magnetic metal material such as stainless steel and has a hat shape or a vertical cross-section formed into a substantially U shape. A protrusion 8 for locking is provided on the open end of the case 7. Next, the disk-shaped magnet 6 made of Sm-Co is housed in the case 7. In this case, if the edge of the magnet 6 is rounded, the adhesion with the case 7 can be improved. An adhesive is interposed between the magnet 6 and the case 7 to integrally bond them. Next, the dental magnet body 9 formed as described above is placed in a forming die for forming the denture base 4 shown in FIG. 1 so that the bottom surface of the case 7 faces the root plate 3, and the forming resin is formed. It is injected and solidified.
Then, the protrusion 8 provided on the open end of the case 7 is locked in the molding resin, whereby the dental magnet body 9 is formed.
The fixation to the denture base 4 is ensured.
本実施例においては，磁石およびケースの横断面形状を
円形に形成した例を示したが，角形その他の形状であっ
ても作用は同一であると共に，外形寸法および厚さ寸法
もまた自由に選定することができる。またケースを構成
する材料は歯科用の耐食性材料であればステンレス鋼に
限らず，Ｎｉ−Ｃｒ，Ａｕ−Ａｇ−Ｐｄ等の他の非磁性
材料を使用することができる。なお透磁率の高い材料を
使用すると永久磁石の吸引力が低下するため不都合であ
るが，１０％程度の低下であれば支障がないためこの限
りでは僅かに磁性を有する材料であっても使用可能であ
る。更に歯科用磁石体を構成する磁石は，Ｓｍ−Ｃｏ以
外にＮｄ−Ｆｅ−Ｂ等の他の希土類磁石を使用できるこ
とは勿論である。In this embodiment, an example in which the magnet and the case are formed to have a circular cross-sectional shape is shown. However, the same effect is obtained even if the magnet and the case have other shapes, and the outer dimension and the thickness dimension can be freely selected. can do. The material constituting the case is not limited to stainless steel as long as it is a corrosion resistant material for dental use, and other non-magnetic materials such as Ni-Cr and Au-Ag-Pd can be used. Use of a material with a high magnetic permeability is inconvenient because the attractive force of the permanent magnet is reduced, but if it is reduced to about 10%, there is no problem, so even a material with a slight magnetic property can be used. Is. Further, as a magnet constituting the dental magnet body, it is needless to say that other rare earth magnets such as Nd-Fe-B can be used in addition to Sm-Co.
本発明の歯科用磁石体は以上記述のような構成および作
用であるから，義歯床内への埋設固着性を向上すると共
に，耐食性および耐摩耗性を大幅に向上させ得るという
効果がある。Since the dental magnet body of the present invention has the structure and operation as described above, it has the effects of improving the immobilization property in the denture base and significantly improving the corrosion resistance and wear resistance.
第１図は本発明の対象である義歯の例を模式的に示す縦
断面図，第２図は本発明の実施例を示す拡大縦断面図で
ある。 ３：根面板，６：磁石，７：ケース。FIG. 1 is a vertical sectional view schematically showing an example of a denture which is an object of the present invention, and FIG. 2 is an enlarged vertical sectional view showing an embodiment of the present invention. 3: root plate, 6: magnet, 7: case.
Claims (6)
と対向するように義歯床内に埋設する板状に形成した希
土類磁石からなる歯科用磁石体において，前記希土類磁
石を非磁性金属材料からなるケース内に希土類磁石端面
とケース底面とを密着して収納し，ケース底面を前記根
面板と対向して配設すると共に，前記ケースを縦断面形
状を略Ｕ字形に形成すると共に，ケースの開放端縁に係
止用の突起を設けたことを特徴とする歯科用磁石体。1. A dental magnet body made of a rare earth magnet formed in a plate shape to be embedded in a denture base so as to face a root plate made of a magnetic material embedded in an alveolar chamber, wherein the rare earth magnet is a nonmagnetic metal material. The end face of the rare-earth magnet and the bottom face of the case are housed in close contact with each other, the bottom face of the case is disposed so as to face the root plate, and the case is formed to have a substantially U-shaped vertical cross section. A dental magnet body having a locking projection provided on the open end of the.
の範囲第１項記載の歯科用磁石体。2. The dental magnet body according to claim 1, wherein the rare earth magnet is an Sm—Co system.
請求の範囲第１項記載の歯科用磁石体。3. The dental magnet body according to claim 1, wherein the rare earth magnet is an Nd-Fe-B system.
請求の範囲第１項〜第３項何れかに記載の歯科用磁石
体。4. The dental magnet body according to any one of claims 1 to 3, wherein the case bottom has a thickness of 0.1 to 0.3 mm.
1mm以上外方に突出している特許請求の範囲第１項〜第
４項何れかに記載の歯科用磁石体。5. The protrusion for locking is 0.
The dental magnet body according to any one of claims 1 to 4, which projects outward by 1 mm or more.
る特許請求の範囲第１項〜第５項何れかに記載の歯科用
磁石体。6. The dental magnet body according to any one of claims 1 to 5, wherein the material forming the case is stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7327386A JPH0659288B2 (en) | 1986-03-31 | 1986-03-31 | Dental magnet body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7327386A JPH0659288B2 (en) | 1986-03-31 | 1986-03-31 | Dental magnet body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62231653A JPS62231653A (en) | 1987-10-12 |
| JPH0659288B2 true JPH0659288B2 (en) | 1994-08-10 |
Family
ID=13513383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7327386A Expired - Lifetime JPH0659288B2 (en) | 1986-03-31 | 1986-03-31 | Dental magnet body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0659288B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1989011835A1 (en) * | 1988-06-01 | 1989-12-14 | Aichi Steel Works, Limited | Artificial tooth attachment |
| US4997372A (en) * | 1989-10-27 | 1991-03-05 | Js & R Inc. | Magnetic dental retention appliance |
-
1986
- 1986-03-31 JP JP7327386A patent/JPH0659288B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62231653A (en) | 1987-10-12 |
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