WO1996019951A1 - Fixation de prothese dentaire - Google Patents
Fixation de prothese dentaire Download PDFInfo
- Publication number
- WO1996019951A1 WO1996019951A1 PCT/JP1995/002685 JP9502685W WO9619951A1 WO 1996019951 A1 WO1996019951 A1 WO 1996019951A1 JP 9502685 W JP9502685 W JP 9502685W WO 9619951 A1 WO9619951 A1 WO 9619951A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- yoke
- magnet
- keeper
- denture attachment
- denture
- Prior art date
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
- A61C8/0081—Magnetic dental implant retention systems
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C13/00—Dental prostheses; Making same
- A61C13/225—Fastening prostheses in the mouth
- A61C13/235—Magnetic fastening
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
Definitions
- the present invention relates to a denture attachment that detachably attaches a denture to a root portion using a magnetic attraction force. More specifically, the present invention improves the magnetic attraction force per unit body and has a thin and strong magnetic attraction force. About dentures. Background art
- a conventional denture using magnetic attraction force is attached to the denture root 102, which is the root of the natural tooth buried in the gum, with the denture root 102 attached to the denture.
- the foundation of 110 is formed.
- a keeper 103 made of a corrosion-resistant soft magnetic alloy is embedded and fixed in a recess provided in the center of the upper surface of the denture 102.
- the denture attachment 111 is buried.
- the denture attachment 111 is magnetically attracted to the keeper 103, and the denture 110 is denture root 110. It is fixed at 2.
- FIG. 25 disclose a denture attachment 111 whose vertical section is schematically shown.
- the conventional denture holder 1 1 1 is composed of a block-shaped magnet 1 1 2, a spacer 1 made of a corrosion-resistant non-magnetic alloy covering one side of the magnet 1, a magnet 1 1 2 and a spacer. It is composed of a pair of yokes 111, 115 made of a corrosion-resistant soft magnetic alloy sandwiching 113 from both sides, and a cap 116 made of a corrosion-resistant non-magnetic alloy for TO. As shown in Fig.
- this conventional denture attachment 1 1 1 has the N-S pole of the magnet 1 1 2 located parallel to the keeper 103, and the magnetic force lines coming out of the magnet 1 1 2 are the yoke 1 1 Through 4, enter the keeper 103, then return to the magnet 1 12 through the other yoke 1 15 A single magnetic circuit is formed, which exerts a relatively strong magnetic attraction.
- FIG. 26 shows an arrangement state of magnets
- FIG. 27 discloses a denture attachment 122 showing a denture fixed to a tooth.
- This denture attachment 1 2 1 consists of a permanent magnet 1 2 2 and a plurality of soft magnetic bodies 1 2 3 and a force, and a permanent magnet 1 2 2 and a soft 6S body 1 2 3 are alternately and adjacent to each other.
- the permanent magnets 122 are formed such that the same poles face each other.
- the present invention has been devised in view of the above problems, and has as its object to dramatically improve the value of the magnetic absorption per unit volume [FZV] to provide a thin and strong denture attachment. is there.
- the denture attachment of the present invention is a denture attachment that is planted on a denture base so as to face a keeper made of a soft magnetic material fixed to the keeper, and that is ducked with the keeper by magnetic attraction. At least three yokes made of a soft magnetic material are sandwiched between the yokes, and the HM surface parallel to the thickness direction magnetically forms the surface with the gap. The yoke overlaps and is fixed to the yoke in the thickness direction, the N-S pole extends in the thickness direction, and the two opposing poles that sandwich one yoke are the same pole.
- At least two plate-shaped magnets each of which is independently formed of one of the magnets, one of the yokes that sandwiches the magnet, the keeper, and the other that sandwiches the magnet.
- H / S 1/2 which is 3 ⁇ 4 from the area S and ⁇ 3 ⁇ 4 surface of the surface in the height H of the magnet extending vertically 0. Is 5 5 or less, and ⁇ I force is at 5 0 O gf or more That is 1 ⁇ . It is more preferable that H / S 1/2 be 0.50 or less.
- Atatsuchimen Bok of the present invention is' 0.7 5 or less, preferably a further 0 70 or less is good.
- This denture attachment has a HK image parallel to the thickness direction, a central yoke made of a soft magnetic material in the form of a plate, which serves as a central plane magnetically formed with the keeper, and a thickness direction with the central yoke.
- a first magnet having a plate-like shape having N-S poles extending in the thickness direction and fixed in contact with each other, and a surface of the central yoke opposite to the first magnet, the same as the pole of the first magnet.
- a plate-shaped second magnet having N-S poles extending in the thickness direction, which is overlapped and fixed in the thickness direction so that the poles face each other, and an HM surface parallel to the thickness direction, are connected to the keeper. It is a first side surface that is magnetically!
- the first lateral shock consisting of the body and the one parallel to the thickness direction are the second lateral magnetically with the keeper!
- a second side yoke made of a plate-shaped soft magnetic material and fixed in a thickness direction on the surface of the second magnet opposite to the surface fixed to the central yoke.
- the first magnetic loop can be formed by the above-mentioned 1 magnet, the central yoke, the keeper, and the 1st side yoke, and can be formed by the 2nd magnet, the center yoke, the keeper, and the 2nd side yoke. 2 Make a magnetic loop.
- the keeper which exerts a magnetic attraction force in opposition to the denture attachment, have a thickness approximately equal to that of the first and second side yokes. If it is too thin, the magnetic attachment will not be able to exhibit sufficient magnetic absorption I force, while if it is too thick, it will have a large overall thickness and will not be able to meet the demand for thinning. In the denture attachment with the above structure, the magnetism of the material is significant. Therefore, it is desirable to use the following materials. First, it is preferable that the magnets such as the first magnet and the second magnet are rare earth magnets having a maximum energy product of 2 OMG Oe or more. Rare earth fiber has a problem in corrosion resistance.
- the magnet material a material having high magnetic field and corrosion resistance is more preferable.
- the yoke material constituting the center yoke, the first side yoke, and the second side yoke is a corrosion-resistant soft magnetic material having a saturation magnetic flux density of at least 1,000 G and a magnetic permeability of at least 300,000. It is preferably formed of an alloy.
- the entire denture attachment In order to increase the corrosion resistance of the denture attachment of the present invention, it is preferable to cover the entire denture attachment with a high sensitivity.
- a corrosion resistant metal layer, a sputtering layer, a resin, or the like can be considered.
- the thickness of is preferably 5 m to 200 m. In particular, it is preferable to cover only the first and second magnets and the like, which are problematic in terms of corrosion resistance, with corrosion resistance.
- the center yoke, the first magnet, the second magnet, the first yoke, and the other surface of the second side yoke are covered except for the surface facing the keeper.
- the casing and spacer are welded to each of the above-mentioned yokes by electronic beam welding or laser welding.
- the side peripheral surfaces of the first and second magnets that are not in contact with the yokes may be covered with an annular cap made of a corrosion-resistant non-magnetic material. Preferred.
- the other ends of the first side yoke and the second side yoke, which are farther from the keeper, can be thinner than the fins near the keeper.
- the magnetic flux density is low, so even if the part is made thin, there will be no inconvenience such as reduced magnetic force.
- the center yoke can be made smaller by forming a V-shaped recess at the other end of the center yoke farther from the keeper.
- the caps covering these yokes also have a profile conforming to the shape of the yoke. These weaken the magnetic attachment.
- the denture attachment according to the invention is worn opposite the keeper.
- This denture attachment has a plate-shaped central yoke at the center, a first magnet and a second magnet sandwiching the central yoke from the fffi in the thickness direction, and a first magnet abutting the two magnets from both sides in the thickness direction. It consists of a lateral yoke and a second lateral yoke.
- the two magnets have magnetic poles in the thickness direction, and are arranged so that the poles face each other with the central yoke interposed therebetween.
- the magnetic lines of force coming out of the N pole of the first magnet pass through the half of the center yoke on the first side yoke side, the half of the keeper on the first side yoke side, and the first side yoke, and then return to the original It returns to the S pole of the first magnet and forms the first magnetic loop.
- the magnetic lines of force coming out of the N pole of the second magnet pass through the half of the central yoke on the second side yoke side, the half of the keeper on the second side yoke side, and the second side yoke. Then, the magnetic flux returns to the S pole of the original second magnet to form a second magnetic loop.
- the formation of the two magnetic circuits reduces the thickness of the side yokes, and the thickness of the keeper can be reduced to a thickness substantially equal to that of the side yokes. For this reason, the overall height including the denture attachment and the keeper can be reduced, and the thickness can be reduced.
- the denture attachment according to the present invention can have an extremely thin HZS 1/2 of 0.55 or less, which is defined by the area of the side in contact with the keeper, that is, the apparent surface area S and the height H of the magnet extending perpendicularly from this surface. Moreover, the suction force can be set to 500 gf or more.
- the denture attachment of the present invention has a low height H, that is, is thin. Nevertheless, a strong bowing force can be obtained because the unit ( ⁇ the number of magnets used per unit area is 2 or 3 or more, the number of magnets is large, and the size of each magnet used is 1 no 2 Alternatively, it can be as small as 13 and two or three or more independent magnetic loops are formed.
- the thickness of the keeper used for the denture attachment of the present invention is also 1/2 or 1/3. It can be thinner than the keeper used for denture attachments. The reason that the keeper can be made thinner is that the number of magnetic loops is dispersed to two or three or more, and the magnetic flux that constitutes one magnetic loop can be reduced.
- the magnetic pole area (total area) of the individual magnets used in the denture attachment of the present invention is substantially the same as the magnetic pole area of one large magnet of the denture attachment of Example 1 shown in FIG. Therefore, the total number of magnetic fluxes of the denture attachment of the present invention using two or more magnets is equal to the number of magnetic fluxes of one large magnet of the denture attachment of ⁇ . Since the number of magnetic fluxes is equal, the force of the denture attachment of the present invention is substantially equal to the force of the conventional denture attachment shown in FIG. That is, although the denture attachment of the present invention is thin, the same strong force as a thick denture attachment can be obtained.
- the number of magnets is sufficient to be two or three, and no more magnets are used except in special cases.
- the number of magnets is increased to 10 or 20 magnets, even thinner ones with HZS 2 of 0.1 or less can be easily obtained.
- the strength is almost the same as that of the conventional denture attachment.
- the denture attachment disclosed in the above-mentioned published patent publication shown in FIG. 57-164604 uses a plurality of magnets like the denture attachment of the present invention. ing. However, this patent does not teach reducing the pole area of each magnet. For this reason, the effect that the denture attachment can be made thin has not been achieved.
- the area of the denture attachment of the present invention is 20.0 mm 2 or less, more preferably. It is preferably 14 mm 2 or less, more preferably 1 1.4 mm 2 or less.
- the long side is 5.0 mm or less
- the short side is 4.0 mm or less
- the long side is 4.2 mm or less
- the short side is 3.4 mm or less.
- the long side is 3.8 mm or less and the short side is 3.0 mm or less.
- the value of the magnetic attraction force FZV per unit ⁇ is dramatically improved by adopting a new structure for forming two magnetic loops. By doing so, a thin and powerful denture attachment can be obtained. At the same time, it is possible to increase the adhesion to the denture while satisfying the corrosion resistance and wear resistance.
- Figure 1 is a plan view of the m ⁇ denture attachment and keeper.
- FIG. 2 is a horizontal sectional view of the denture attachment of Example 1.
- FIG. 3 is a longitudinal sectional view of the denture attachment and the keeper of the embodiment.
- FIG. 4 is a horizontal sectional view of the denture attachment of Example 4.
- FIG. 5 is an exploded perspective view of the denture attachment of Example 6S.
- FIG. 6 is a perspective view illustrating the structure of the cap according to the fourth embodiment.
- FIG. 7 is a longitudinal sectional view of a denture attachment and a kino, a modified example of mm 4 o
- FIG. 8 is a horizontal sectional view of a denture attachment of a modification of Example 4.
- FIG. 9 is a longitudinal sectional view of a denture attachment and a keeper according to another modification of the fourth embodiment.
- FIG. 10 is a longitudinal sectional view of a denture attachment and a keeper of still another modified example of Example 4.
- FIG. 11 is a horizontal sectional view of a denture attachment according to a modification of the fourth embodiment.
- FIG. 12 is a longitudinal sectional view of the denture attachment of Example 5.
- FIG. 13 is a longitudinal sectional view of the denture attachment of Example 6 of 5S.
- FIG. 14 is an example of a horizontal sectional view of the embodiment of the present invention.
- FIG. 15 is an example of a horizontal sectional view of the embodiment of the present invention. '
- Fig. 16 is a performance comparison graph of the denture attachment.
- FIG. 17 is a graph showing the relationship between the spacer thickness and the magnetic attraction force per unit ⁇ .
- FIG. 18 is a graph showing the relationship between the deleted volume ratio of the side yoke shoulder and the magnetic attraction force per unit volume.
- FIG. 19 is a longitudinal sectional view of the denture attachment and the keeper of the tenth embodiment.
- FIG. 20 is a horizontal sectional view of the denture attachment of Example 10;
- FIG. 21 is a plan view of the denture attachment and the keeper of Example 11;
- FIG. 22 is a longitudinal sectional view of the denture attachment and the keeper of Comparative Example 1.
- FIG. 23 is a cross-sectional view showing a denture attachment state using a denture attachment.
- FIG. 24 is an exploded perspective view of a conventional denture attachment.
- FIG. 25 is a longitudinal sectional view of the denture attachment of ⁇ .
- FIG. 26 is a schematic diagram showing a combination of a permanent magnet and a soft magnetic material and a magnetic loop of the artificial tooth attachment of the present invention.
- FIG. 27 is a plan view showing a use state of the denture attachment of FIG. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 27 is a plan view showing a use state of the denture attachment of FIG. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1 is a plan view and FIG. 2 is a cross-sectional view of the denture attachment according to the first embodiment of the present invention.
- this denture attachment one side parallel to the thickness direction T is a central surface 109 that magnetically interacts with the keeper 103. Have.
- a plate-shaped first magnet 1 having an N-S pole extending in the thickness direction T, which is overlapped with and fixed to the center yoke 10 in the thickness direction T, and a center of the first magnet 1 and the side.
- one side surface parallel to the thickness direction T becomes a first side t3 ⁇ 4 «surface 1 19 which is magnetic with the keeper 103, and is fixedly abutted on the central yoke 10 of the first magnet 1.
- a first side yoke 11 made of a soft magnetic material and fixed in a thickness direction T is provided.
- a plate-shaped soft magnetic material fixed in a thickness direction T on the surface opposite to the surface fixed in contact with the center yoke 10 of the second magnet 2 Has a second lateral yoke 12 consisting of:
- the central yoke 10, the first and second magnets 1, 2, the first and second side yokes 11, 12 are put into a case 3 made of a non-magnetic alloy.
- the center yoke 10 facing the keeper 103, the center of the first and second side yokes 11 and 12 [ ⁇ face 109 and the first side suction face 1 19, the second side suction face 1 2 9 is at the same position as the opening surface of case 3 and is exposed from case 3.
- the first and second magnets 1 and 2 facing the keeper 103 are covered with spacers 21 and 22 formed of a nonmagnetic alloy.
- the boundary surfaces of the case 3 facing the keeper 103, the spacers 21 and 22 and the central yoke 10 and the first and second side yokes 11 and 12 are saliva.
- they are completely sealed by being watertight with an electron beam or a laser.
- HZS 1/2 defined by the area S of the surface and the height H of the attachment vertically extending from the surface is 0.45, achieving the extremely thin attachment of 0.55 or less which is the object of the present invention. are doing.
- THZS 1/2 calculated by the total height TH including the gap is 0.69, which is smaller than 0.75 which is the object of the present invention.
- Example 3 Even with the denture attachment of Example 3, the same material and the same as in Example 1 ⁇ : The force of taking the structure, as shown in Table 3, the thickness of the rare earth mfiS stones as magnets 1 and 2 was increased and the height was increased. Reduced to 1.3 mm. As a result, a magnetic attraction force of 564 gf was exhibited in a flatter shape.
- the HZS 1/2 is 0. 3 7
- THZS 2 is 0.5 8 next, have achieved very thin attachment.
- the denture attachment of the fourth example has a different structure from the first to third embodiments. That is, the first magnet 1 is brought into contact with the center yoke 10 and the first side yoke 11 as shown in FIG. 3, its longitudinal sectional view, its transverse sectional view in FIG. 4, and its exploded perspective view in FIG. An annular cap 5 made of a corrosion-resistant non-magnetic material is integrally formed on the side peripheral surface that is not provided. Similarly, the second magnet 2 is covered with a similar cap 5 on the ffll peripheral surface that is not in contact with the center yoke 10 and the second side yoke 12.
- a case that covers the magnets 1 and 2 and the yokes 10, 11, and 12 except for the surface that contacts the keeper, and a spacer that protects the bottom surfaces of the magnets 1 and 2 are not used.
- the joints between the caps 5 and the yokes 10, 11, and 12 are all water-tightly joined by electron beam welding or laser welding, and the corrosion of the magnets 1 and 2 due to the intrusion of saliva etc. Has been prevented.
- the cap 5 is assembled from a U-shaped member 51 surrounding the first magnet 1 or the second magnet 2 in U and a flat plate member 52 closing and closing the upper surface thereof.
- the parts are joined watertight by electron beam welding or laser welding.
- the assembling structure of the cap 5 is not limited to this, and may be joined by joining the same shape members from the left and right, or by joining the four sides of the corner by covering the four sides with a flat plate member. Alternatively, a single flat plate may be used, and the ends may be butt-joined and joined.
- the cap 5 may be formed by first forming the structure, and then fitting the magnet 1 or 2 therein.
- the cap 5 is made of a material with the lowest possible magnetic permeability (permeability of 1.2 or less), and the corrosion resistance and the minimum thickness of the welding process allow the magnetic attachment to exhibit strong magnetic attraction. It is important above.
- Table 4 shows the shape, magnetic properties, and materials of each component of the present example. Unlike the previous embodiment, there is no spacer and case, and a cap 5 is used instead.
- FIG. 7 As a modified example of the denture attachment of the fourth embodiment, as shown in a sectional view of FIG. 7, the opposite upper ends of the first side yoke 11 and the second side yoke 12 are shown.
- the corner may be chamfered.
- the center of the upper surface of the center yoke 10 may be a V-shaped recess.
- the upper end corners of the first side yoke 11 and the second side yoke 12 and the center of the upper surface of the center yoke 10 have lower magnetic flux densities than the other parts, so that the corners are dropped or grooves are formed. be able to.
- grooves can be formed on the side surfaces of the first side yoke 11 and the second side yoke 12. This groove serves as an anchor when fixing the denture attachment.
- the resin for ⁇ enters this groove, and the attachment can be securely fixed by the denture.
- the denture attachment can be fixed by forming a ⁇ -shaped thin groove on all or part of the surface.
- a cross section of the first side yoke 11 and the second side yoke 12 may be formed at four corners of the side surface.
- This example has the same magnetic layer and material as Example 1 as shown in Table 5. The only difference is that, as shown in FIG. 12, the shoulders of the side yokes 11 1 and 12 opposite to the magnets 1 and 2 are cut away. As a result, while the amount of ⁇ * ⁇ was slightly reduced and the teeth were worn inside the denture, the magnetic absorption I-force exhibited 63 gf, which was comparable to that of 6 gf in Example 1. . HZS 1/2 is 0.45 and TH / S 2 is 0.66, achieving an extremely thin attachment.
- the present embodiment is made up of structural members having the same shape, magnetic field, and material as those of the 6S example 1.
- Table 6 shows the specifications. The difference from Example 1 is that, as shown in Fig. 13, the surface of the central yoke 10 opposite to the surface facing the keeper is cut off, and the bridge member 4 is bridged in the valley to improve the adhesion to the denture. This is because it was raised to prevent falling off.
- the bridge member 4 may be formed by bridging several rod-shaped members, or may be formed by cross-linking a plate having a large number of holes.
- Example 5 As in Example 5, the yoke was cut so as not to block the flow of the lines of magnetic force, so that the magnetic attraction force was hardly reduced, and the power of 61 gf was exhibited. And HZS 2 became 0.45, TH / S 1/2 force, '0.66, achieving an extremely thin attachment.
- the magnetic attraction force is changed by changing the materials of the first and second magnets 1 and 2 and the spacers 21 and 22 and the case 3 as compared with the first embodiment.
- 66 6 gf the highest value so far.
- the HZS '/ 2 is 0. 4
- THZS 1 2 is 0.6 9, and the that have achieved a very thin attachment.
- This embodiment is a denture attachment having the same configuration, dimensions, and shape as those in Embodiment 1 as shown in Table 8. The difference is that the material of each yoke 10, 11, and 12 was changed and the saturation magnetic flux density was increased from 16 000 G to 24 000 G using an iron-cobalt alloy (trade name: Permendur). It is. As a result, the magnetic attraction force was dramatically increased to 110 gf, which is the highest in this embodiment. And HZS 1 2 0.45, Ding 14 Bruno 3 2 0.63, and the have achieved very thin attachment. To protect the corrosive pure iron, a 20 m high chromium surface modification layer is provided on the surface of the denture attachment facing the keeper.
- the present example is a denture attachment having the same structural dimensions as Example 1 as shown in Table 9. The difference is that i ⁇ is used for each of the yokes 10, 11, 12 and the keeper as the keeper 103 to obtain a saturation magnetic flux density of 22000 G and a magnetic permeability of 10000.
- a 20-zm high-chromium surface-modified layer is provided on the surface of the denture attachment facing the keeper to protect it from corrosion.
- a high magnetic attraction force of 818 gf could be exerted, which is second only to that of Embodiment 8.
- HZS 1/2 is 0.45 and TH / S 1/2 is 0.63, achieving an extremely thin attachment.
- the horizontal cross-sectional shape is rectangular as shown in Fig. 2.
- the external shape is devised so that it can easily fit into the denture. be able to.
- the shape can be a cross section with a corner dropped as shown in FIG. 14, a circle as shown in FIG. 15, a polygon, an oval, or a substantially circular shape.
- the three-dimensional shape can be devised according to, for example, by sharpening the shoulders of the yokes 1 1 and 1 2 on both sides shown in Fig. 12 to a greater extent near the surface in contact with the keeper 103
- the longitudinal yokes 11 and 12 on both sides may be shaped like a triangle.
- the outer shape of the entire denture attachment can be devised such as to be trapezoidal or trapezoidal conical. (: Example 10)
- FIG. 9 is a longitudinal sectional view of a denture attachment of Example 10 of the present invention
- FIG. 20 is a transverse sectional view thereof.
- this denture attachment one parallel to the thickness direction ⁇ ⁇ is magnetic with the keeper 103! It has two central yokes 10 in the center, which are plate-shaped and made of a soft magnetic material and serve as a central attracting surface 109.
- the central yoke 10 is overlapped and fixed in the thickness direction ⁇ in the thickness direction ⁇ , and the S- ⁇ pole extends in the thickness direction ⁇ .
- the same direction as the pole of the medium stone 100 is opposed to the surface of one central yoke 10 opposite to 100 0 in the thickness direction ⁇ ⁇ .
- the plate-shaped first magnet 1 with the ⁇ -S pole extending and the same pole as the pole of the central magnet 100 oppose the surface of the other central yoke 10 on the other side.
- a plate-shaped second magnet 2 fixedly abutted and having a ⁇ -S pole extending in the thickness direction ⁇ . Further, a ⁇ surface parallel to the thickness direction ⁇ ⁇ ⁇ becomes a first lateral!
- one side surface parallel to the thickness direction ⁇ ⁇ ⁇ is a second side surface 1 29 that is magnetically formed with the keeper 103, and is a surface fixed to abut the central yoke 10 of the second magnet 2.
- a second side yoke 12 made of a soft magnetic material and fixed on the opposite side in the thickness direction ⁇ ⁇ .
- central yokes 10 and 10 the intermediate stone 100 and the second magnets 1 and 2, the first and second side yokes 11 and 12 are formed in a case 3 made of a non-magnetic alloy.
- the central yokes 10 and 10 facing the keeper 103 and the first and second lateral yokes 11 and 12 and the central upper faces 109 and 109 and the first lateral faces 119 and The two side surfaces 1 2 9 are at the same position as the opening surface of case 3 and are exposed from case 3.
- the first and second magnets 1 and 2 facing the keeper 103 and the intermediate stone 100 are covered with a spacer 21, 22, 23 formed of a non-magnetic alloy.
- Example 10 Denture attachment of example 10 and stones constituting it 10 o, first and second magnets 1 and 2, first and second side yokes 11 and 12, central yoke 10 and 1 Table 17 shows the shapes, magnetic fields, and materials of 0, spacers 21, 22, 23, case 3, and keeper 103.
- a third magnetic loop is formed with the yokes 1 and 2.
- the center yokes 10 and 10 have approximately 1.66 times the thickness of the side yokes 1K12 in order to pass the two magnetic loops with »J. It is.
- This denture attachment forms three magnetic loops that were not present in the ⁇ denture attachment, and can be made even thinner. Specifically, it exhibits a suction force of 5 gf and has a performance exceeding the 50 O gi required for a denture attachment, and the height of the denture attachment alone is only 1.0 mm. And can be thinner.
- the HZS 1 2 is 0.3 1 becomes to be ⁇ extending perpendicularly from the area S and! Plane surface evening at a height H of Tsu Chimento ⁇ , shall be the object in the present invention 0.5 5 following thinner attachment Have achieved.
- THZS 1 2 which is free meth total height ⁇ ⁇ the Kiba is summer extremely thinner than 0.7 5 aimed at 0.4 4 next invention. Paving example 1 1)
- FIG. It consists of a stone 1, a second magnet 2, a center yoke 10, a first side yoke 11 and a second side yoke 12, and uses a case and a suniser to protect the bottom surfaces of both magnets 1 and 2.
- Table 1 the first magnet 1, the second magnet 2 by using the same N d 1 4 F e 77 B 8 magnet material as used in Example 7, and reduced shape.
- the denture attachment of the present embodiment uses the configuration of the fourth embodiment and the strong neodymium magnet of the seventh embodiment to exhibit a suction force of 600 gf without increasing the number of magnets to two.
- the height of the denture attachment alone is reduced to only 1.2 mm.
- FIG. 22 shows a plan view of the denture attachment of Comparative Example 1.
- the denture attachment of Comparative Example 1 was prepared to demonstrate the effect of the number of magnets of the denture attachment using two magnets of Example 11 and the denture attachment using one magnet. It is.
- the denture attachment of Comparative Example 1 is designed to exhibit the same suction force of 6200 gf as the denture attachment of Example 11.
- Table 12 shows the shape and dimensions of each component of the denture attachment of Comparative Example 1.
- the thickness of the denture attachment of Comparative Example 1 was 2.4 mm, and the thickness of the keeper was 1.2 mm. Therefore, the ratio H / S 1/2 is 0.78, which is larger than 0.55 or less, which is the target of the present invention.
- the total height TH including the gap is TH ⁇
- the resulting THZS 1/2 is also 1.16, which is considerably thicker than 0.75, which is the object of the present invention.
- This conventional example is a commercial product A.
- the structure is as shown in Fig. 24 and Fig. 25, and a spacer 113 made of a corrosion-resistant non-magnetic alloy covering one side of the magnet and a magnet 111 It is composed of a pair of yokes 114, 115 made of a corrosion-resistant soft magnetic alloy sandwiching the spacer 113 from both sides, and a cap 116 made of a non-magnetic, corrosion-resistant alloy for TO. It has a structure in which a single magnet is sandwiched between yokes from both sides, and has a material of magnetic 14 and ⁇ as shown in Table 13. Its overall length is as large as 2.5 mm in height and 12.0 mm 2 in cross-sectional area.
- the magnetic force is 605 gf, which is as large as JW with the present embodiment, but too large compared to the standard height of 1.5 mm of the present embodiment, and the range of use as a denture attachment is It has to be limited.
- H / S 1/2 is 0.72
- THZS 2 is 1.01, and it is not a thin denture attachment.
- This conventional example is a commercial product B, which has the same basic structure as that of Example 1 described above, but the height of Comparative Example 1 is reduced to 1.5 mm as shown in Table 14 It is. Its aspiration drops to 40 O gf, less than 500 gf, which is considered to be the suction power of the denture attachment. [Table 14] Example 3)
- This conventional example is a commercial product C, and its specifications are shown in Table 15.
- the structure of this denture attachment is such that a single cylindrical magnet is installed in the direction in which one magnetic pole faces the keeper, and the line of magnetic force from the other magnetic pole on the opposite side of the keeper is shaped like a force. In this way, the magnet is detoured around the magnet and guided to the keeper.
- a magnetic attraction force of 352 gf is obtained as a result, and performance that is even worse than that of Conventional Example 2 described above can be exhibited. Absent.
- Example 4 is a denture attachment that consists of a single rare earth stone sandwiched between two side yokes from both sides. As shown in Table 16, the specifications have the same outer diameter and material of the constituent members as in Example 1 of the present application, and the magnets are the same as the first and second magnets 1 and 2 of Example 1. It has the thickness according to one. That is, this is a case in which the configuration according to the present invention is compared with the configuration using a single magnet.
- the magnetic absorption I force is 335 gf, which is far from the denture attachment with two magnetic loops of the present invention. It has been clarified whether the present invention is superior.
- Example 8 has the best magnetic absorption I force and the best per unit job.
- Example 9 it is clear that even if inexpensive ⁇ is used instead of a special alloy such as iron cobalt vanadium as a material for each yoke, the magnetic attraction force can be exerted next to the most excellent Example 8. became.
- Example 10 Even if the height is reduced to 1.3 mm in Example 3 and the cross-sectional area is reduced to 9.8 mm 2 in Example 4, the height exceeds 500 gf required for denture attachment It has been demonstrated that it can exert a strong magnetic attraction.
- Example 10 the use of three magnets allowed the denture attachment height to be extremely low at 1.03 mm.
- Example 11 an extremely thin denture attachment was obtained with two magnets having an attractive force of 6.20 gf, an H / S 1/2 of 0.39, and a TH / S l of 0.58. ing.
- FIG. 16 is a graph comparing these excellent examples of the present invention with conventional products and the like in terms of magnetic attraction force per unit. It is clear from the figure that the denture attachment of the present invention is much better than the conventional product.
- the spacers 21 and 22 are applied under both magnets.
- the effect of the thickness of the stirrer on the magnetic attraction force was determined experimentally. As shown in Fig. 17, the results showed that it was important to make the spacers 21 and 22 thinner in order to secure a strong magnetic attraction.
- the denture attachment of the present invention by adopting a new structure for forming a plurality of magnetic lubes, the limited volume required for the denture attachment, especially the overall height including the keeper, is improved. Under the severe restrictions, it is possible to demonstrate a powerful magnetic absorption 1 power that is twice that of conventional technology.
- Example 1 commercial product A
- Example 8 the denture attachment height 2.5 mm is 1.5 mm and the keeper thickness 1.0 O mm is 0.8. mm
- the overall height of the combined denture attachment and keeper has been reduced from 3.5 mm to 2.3 mm, which is less than two-thirds.
- the cross-sectional area was reduced from 12.0 mm 2 to 11.0 mm 2
- the magnetic attraction was able to double from 60.5 g to 10 17 g. . If this is converted into a magnetic attraction force FZV per unit ⁇ , it is clear how excellent the invention of the present application is, in fact, in a three-fold improvement in performance.
- H / S 1 2 0.45 No. Height Width Thickness Product 3 ⁇ 4 ⁇ 3 a 2 1.2 ⁇ 3.0 0.45 3 (M30e 3 ⁇ 4 2 2C les o U17 central yoke height width thickness
- mice 4000 19Cr-Ran Job (mm) mm Attachment Height H s
- HZS 1 2 0.72 Height Width Thickness: O product
Landscapes
- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Dentistry (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Dental Prosthetics (AREA)
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/702,491 US5931676A (en) | 1994-12-27 | 1995-12-26 | Dental attachment |
JP52035996A JP3539568B2 (ja) | 1994-12-27 | 1995-12-26 | 義歯アタッチメント |
EP95941889A EP0747018B1 (en) | 1994-12-27 | 1995-12-26 | Denture attachment |
CA002183987A CA2183987C (en) | 1994-12-27 | 1995-12-26 | Dental attachment |
AU43158/96A AU687657B2 (en) | 1994-12-27 | 1995-12-26 | Denture attachment |
KR1019960704721A KR970701023A (ko) | 1994-12-27 | 1995-12-26 | 의치 어태치먼트(Dental attachment) |
DE69534427T DE69534427D1 (de) | 1994-12-27 | 1995-12-26 | Befestigung einer zahnprothese |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JPPCT/JP94/02228 | 1994-12-27 | ||
PCT/JP1994/002228 WO1996019948A1 (fr) | 1994-12-27 | 1994-12-27 | Attachement de prothese dentaire |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1996019951A1 true WO1996019951A1 (fr) | 1996-07-04 |
Family
ID=14098914
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1994/002228 WO1996019948A1 (fr) | 1994-12-27 | 1994-12-27 | Attachement de prothese dentaire |
PCT/JP1995/002685 WO1996019951A1 (fr) | 1994-12-27 | 1995-12-26 | Fixation de prothese dentaire |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1994/002228 WO1996019948A1 (fr) | 1994-12-27 | 1994-12-27 | Attachement de prothese dentaire |
Country Status (9)
Country | Link |
---|---|
US (1) | US5931676A (ja) |
EP (1) | EP0747018B1 (ja) |
KR (1) | KR970701023A (ja) |
CN (1) | CN1148330A (ja) |
AU (2) | AU1281595A (ja) |
CA (1) | CA2183987C (ja) |
DE (1) | DE69534427D1 (ja) |
TW (1) | TW261524B (ja) |
WO (2) | WO1996019948A1 (ja) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6200134B1 (en) | 1998-01-20 | 2001-03-13 | Kerr Corporation | Apparatus and method for curing materials with radiation |
CN1248658C (zh) * | 1998-02-05 | 2006-04-05 | 爱知制钢株式会社 | 义齿磁固位体及其固定方法和固定用隔片 |
JP2002102258A (ja) * | 2000-09-29 | 2002-04-09 | Aichi Steel Works Ltd | バータイプインプラント用義歯アタッチメント |
KR100401044B1 (ko) * | 2000-10-25 | 2003-10-10 | 최한철 | 치과 어태치먼트용 자석구조체의 제조방법 |
US7182597B2 (en) | 2002-08-08 | 2007-02-27 | Kerr Corporation | Curing light instrument |
US20060040234A1 (en) * | 2004-08-17 | 2006-02-23 | Orange County Cosmetic Dental Lab, Inc. | Denture device |
JP4692873B2 (ja) * | 2004-09-16 | 2011-06-01 | 日立金属株式会社 | 磁性アタッチメント |
US8113830B2 (en) | 2005-05-27 | 2012-02-14 | Kerr Corporation | Curing light instrument |
US9066777B2 (en) | 2009-04-02 | 2015-06-30 | Kerr Corporation | Curing light device |
US9072572B2 (en) | 2009-04-02 | 2015-07-07 | Kerr Corporation | Dental light device |
US20110223564A1 (en) * | 2010-03-11 | 2011-09-15 | Donald Lee West | Magnetic connector |
CN102030560B (zh) * | 2010-11-13 | 2012-10-03 | 上海交通大学 | 水性混凝土密封硬化剂及其制备方法 |
US10170971B1 (en) * | 2017-06-30 | 2019-01-01 | Oracle International Corporation | Dual pole dual bucking magnet linear actuator |
CN109542254B (zh) * | 2018-10-31 | 2022-03-22 | 广州三星通信技术研究有限公司 | 手写笔以及包含该手写笔的电子装置 |
Citations (7)
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JPS57164054A (en) * | 1981-03-31 | 1982-10-08 | Hitachi Metals Ltd | Apparatus for stabilizing and holding denture |
JPS62211061A (ja) * | 1986-03-11 | 1987-09-17 | 日立金属株式会社 | 歯科用磁石 |
JPH01303145A (ja) | 1988-06-01 | 1989-12-07 | Aichi Steel Works Ltd | 義歯アタッチメント |
JPH02295557A (ja) | 1989-05-10 | 1990-12-06 | Aichi Steel Works Ltd | 義歯アタッチメント |
JPH05285160A (ja) * | 1992-04-14 | 1993-11-02 | Hitachi Metals Ltd | 歯科用磁気アタッチメント |
JPH0678939A (ja) * | 1992-09-03 | 1994-03-22 | Hitachi Metals Ltd | 義歯固定用磁性アタッチメントおよびキーパー |
JPH0678938A (ja) * | 1992-09-03 | 1994-03-22 | Hitachi Metals Ltd | 義歯固定用磁性アタッチメント |
Family Cites Families (5)
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FR2614656B1 (fr) * | 1987-04-30 | 1989-06-16 | Comadur Sa | Dispositif magnetique d'assemblage, notamment pour prothese dentaire |
JPH0732785B2 (ja) * | 1989-05-10 | 1995-04-12 | 愛知製鋼株式会社 | 義歯アタッチメント |
DE4244718C2 (de) * | 1992-08-27 | 1998-12-17 | Dental Labor Hartmut Stemmann | Magnetanordnung für therapeutische Zwecke |
DE69530469T2 (de) * | 1994-07-15 | 2004-02-26 | Hitachi Metals, Ltd. | Struktur zur stabilisierung eines kunstzahns mit einem permanentmagneten, kunstzahnstabilisierungshalterung und magnetische kunstzahnbefestigung |
JP3368729B2 (ja) * | 1995-03-20 | 2003-01-20 | 愛知製鋼株式会社 | 義歯アタッチメント |
-
1994
- 1994-12-27 AU AU12815/95A patent/AU1281595A/en not_active Abandoned
- 1994-12-27 WO PCT/JP1994/002228 patent/WO1996019948A1/ja active Application Filing
-
1995
- 1995-03-30 TW TW084103083A patent/TW261524B/zh active
- 1995-12-26 EP EP95941889A patent/EP0747018B1/en not_active Expired - Lifetime
- 1995-12-26 AU AU43158/96A patent/AU687657B2/en not_active Ceased
- 1995-12-26 US US08/702,491 patent/US5931676A/en not_active Expired - Fee Related
- 1995-12-26 DE DE69534427T patent/DE69534427D1/de not_active Expired - Lifetime
- 1995-12-26 CA CA002183987A patent/CA2183987C/en not_active Expired - Fee Related
- 1995-12-26 CN CN95191819A patent/CN1148330A/zh active Pending
- 1995-12-26 WO PCT/JP1995/002685 patent/WO1996019951A1/ja active IP Right Grant
- 1995-12-26 KR KR1019960704721A patent/KR970701023A/ko not_active Application Discontinuation
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JPS57164054A (en) * | 1981-03-31 | 1982-10-08 | Hitachi Metals Ltd | Apparatus for stabilizing and holding denture |
JPS62211061A (ja) * | 1986-03-11 | 1987-09-17 | 日立金属株式会社 | 歯科用磁石 |
JPH01303145A (ja) | 1988-06-01 | 1989-12-07 | Aichi Steel Works Ltd | 義歯アタッチメント |
JPH02295557A (ja) | 1989-05-10 | 1990-12-06 | Aichi Steel Works Ltd | 義歯アタッチメント |
JPH05285160A (ja) * | 1992-04-14 | 1993-11-02 | Hitachi Metals Ltd | 歯科用磁気アタッチメント |
JPH0678939A (ja) * | 1992-09-03 | 1994-03-22 | Hitachi Metals Ltd | 義歯固定用磁性アタッチメントおよびキーパー |
JPH0678938A (ja) * | 1992-09-03 | 1994-03-22 | Hitachi Metals Ltd | 義歯固定用磁性アタッチメント |
Non-Patent Citations (1)
Title |
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See also references of EP0747018A4 * |
Also Published As
Publication number | Publication date |
---|---|
DE69534427D1 (de) | 2005-10-13 |
AU4315896A (en) | 1996-07-19 |
WO1996019948A1 (fr) | 1996-07-04 |
EP0747018A4 (en) | 2000-02-23 |
TW261524B (en) | 1995-11-01 |
AU1281595A (en) | 1996-07-19 |
CA2183987A1 (en) | 1996-07-04 |
KR970701023A (ko) | 1997-03-17 |
EP0747018B1 (en) | 2005-09-07 |
CA2183987C (en) | 2000-09-12 |
US5931676A (en) | 1999-08-03 |
AU687657B2 (en) | 1998-02-26 |
EP0747018A1 (en) | 1996-12-11 |
CN1148330A (zh) | 1997-04-23 |
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