DE202005003745U1 - Grinding and polishing disk used for dental work has thin circular baseplate with central aperture and with abrasive coating on its outer portion and abrasive ring on its outside diameter - Google Patents

Abstract

The grinding and polishing disk for use on a patient's teeth has a thin circular baseplate (1) made of spring steel. A central aperture (4) accommodates a drive shaft on the axis of rotation (5). The outer portion of the disk has an abrasive coating (2) on either side. The abrasive coating consists of a substrate containing diamond particles. The abrasive ring (3) on the outside diameter of the circular baseplate may have a thickness equal to the baseplate or a thickness equal to the baseplate and the abrasive coating on either side of the disk.

Description

The The invention relates to a dental grinding wheel according to the preamble of the main claim.

in the Specifically, the invention relates to a dental grinding wheel with a thin, flexible, circular plate-shaped Carrier body, which at least in part on at least one surface with abrasive particles is occupied.

Dental grinding wheels Of the type mentioned are from the prior art in different ways embodiments known. They are used both for separating and separating as well used to work out contours. As abrasive particles become mostly diamond grains usually used be present in a galvanic bond or by means of a galvanic Process be attached.

The Diamond discs either have a central recess, in order to be fastened to a mandrel of a drive device or are firmly provided with a mandrel or shank to drive in a device to be clamped.

The Dental grinding wheels are driven at very high speeds. For this reason, the carrier body is customary Made of a metallic material, usually made of a spring steel sheet or similar, which has both a sufficient strength and sufficient flexibility having.

Around sufficiently thin Be able to make cuts is the carrier body accordingly thinly dimensioned, similar to one Metal foil or a metal sheet.

Of the The prior art knows dental grinding wheels, which one-sided or on both sides on its surface are coated with abrasive Par. The abrasive particles extend thereby also on the outer peripheral edge. Due to the particular conditions of use such However, dental grinding wheels only have a certain service life, until the abrasive particles are processed and the dental grinding wheel thus dull. Once the abrasive coating (the abrasive particles) is finished, leaves the cutting performance after. additionally there is a risk of discoloration due to the metallic contact on the surface to be machined.

Of the Invention is based on the object, a dental grinding wheel to create the type mentioned, which with a simple structure and easier, cheaper Producibility a high chip rate, especially in the edge area Has.

According to the invention Problem solved by the feature combination of the main claim, the under claims show further advantageous embodiments of the invention.

According to the invention is thus provided that arranged on the peripheral edge of the carrier body, an annular region is which comprises abrasive particles.

By additionally provided according to the invention Ring area it is possible at the peripheral edge of the carrier body additional To arrange abrasive particles, which increase the cutting performance and accordingly extend the service life. Very cheap It is there, if the ring area made of a material is, which is interspersed with abrasive particles. This results the opportunity to become one high volume of abrasive particles especially at the edge area to arrange at which at a separating, separating insert the dental grinding wheel or when working out contours a particularly high cutting performance is required.

According to the invention it can in cheaper Embodiment of the dental grinding wheel be advantageous if the Ring region has a thickness which is equal to the thickness of Carrier body. there Is it possible, the ring area additionally, as well as the metallic carrier body the already mentioned abrasive Coating particles which, for example, electrodeposited become. Thus, the ring area with an additional layer of abrasive Particles coated be.

In a cheap one Further development of the invention is provided that the with the additional abrasive Particles occupied annular region has the same thickness as that with the abrasive particles occupied carrier body. It follows thus a uniform thickness of the entire dental grinding wheel, wherein the electrodeposited abrasive particles first the provided according to the invention, additional Cover ring area and this is thus effective only when the abrasive particles of the galvanic assignment processed or worn. These Design of the dental grinding wheel is thus in particular with regard to the separation or Separierwirkung of particular advantage.

According to the invention, the support body can be covered either over the entire surface or at an annular region with abrasive particles. Furthermore, it can be advantageous according to the invention if the carrier body is provided with recesses which, on rotation of the carrier body during use, allow an optical view through the carrier body union. The recesses may be singular, but it is also possible to provide a uniform pattern of recesses, for example in individual rows, which are offset from each other, so that a densest packing similar to a honeycomb construction results, in which case the recesses may take different forms, namely round, hexagonal, rectangular or other design.

in the The invention will be described below on the basis of exemplary embodiments described with the drawing. Showing:

1 FIG. 2 a schematic side sectional view of a first embodiment of a dental grinding wheel according to the invention, FIG.

2 an enlarged view of the edge area (detail Y),

3 a representation of another embodiment, analog 1 , and

4 an enlarged view of the detail X according to 3 ,

The two embodiments each show a disk-shaped, thin, metallic, flexible carrier body 1 , which has a central recess 4 is provided. The dental grinding wheel is about a rotation axis 5 rotatable, the recess 4 for attachment to a mandrel, shank or the like is used. Since this corresponds to the prior art, has been dispensed with the corresponding representation.

At a circular ring area are on the two surfaces of the carrier body 1 each abrasive particles 2 arranged, for example by galvanic deposition. It is also possible to use the abrasive particles 2 to fix by means of a solder joint. This also corresponds to the state of the art, so that it is possible to dispense with a further detailed discussion. Usually, the abrasive particles are in the form of diamond chips or diamond grains.

As the 1 and 2 show, is at the peripheral region of the carrier body 1 a ring area 3 provided, which is made of a material which is interspersed by abrasive particles (for example, diamond grains). For the sake of clearer illustration was based on the reproduction of each abrasive particles in the ring area 3 as well as the reproduction of the abrasive particles 2 , These are also shown only schematically in the coating.

As the 2 shows, in this embodiment, the ring area 3 formed with the same thickness as the carrier body 1 , The abrasive particles 2 thus also extend over the two surfaces of the ring area 3 and also cover the peripheral surface or face 6 from.

In the embodiment of the 3 and 4 indicates the ring area 3 a thickness equal to the total thickness of the support body 1 as well as the two layers of abrasive particles 2 (see in particular 4 ). Thus, the ring area 3 not separate from a layer of abrasive particles 2 covered, leaving the ring area 3 may have a greater thickness and thus a larger volume. It is understood that the representations have been changed in scale for purposes of illustration.

typical Move thicknesses of the carrier body between 0.05 mm and 0.30 mm. The one with the abrasive particles penetrated ring area, for example, a thickness between 0.2 and 2.0 mm (in the radial direction). The thickness in axial Direction (relative to the axis of rotation of the dental grinding wheel) results resulting from the above-mentioned thickness of the carrier body.

In the context of the invention, various modifications and modifications are possible, in particular with regard to the axial and radial extent of the annular region 3 ,

1

support body

2

abrasive particle

3

ring area

4

recess

5

axis of rotation

6

Circumferential / face

Claims (10)

Dental grinding wheel with a thin, flexible, circular plate-shaped carrier body ( 1 ), which at least partially on at least one surface with abrasive particles ( 2 ) is occupied, characterized in that at the peripheral edge of the carrier body ( 1 ) a ring area ( 3 ), which comprises abrasive particles. Dental grinding wheel according to claim 1, characterized in that the annular region ( 3 ) is made of a material which is interspersed with abrasive particles. Dental grinding wheel according to claim 1 or 2, characterized in that the annular region ( 3 ) has a thickness which is equal to the thickness of the carrier body ( 1 ). Dental grinding wheel according to claim 3, characterized in that the annular region ( 3 ) is coated on at least one surface with abrasive particles. Dental grinding wheel according to claim 4, characterized in that the ring area occupied by the additional abrasive particles ( 3 ) has the same thickness as that with the abrasive particles ( 2 ) occupied carrier body ( 1 ). Dental grinding wheel according to claim 1 or 2, characterized in that the annular region ( 3 ) has a thickness which is the same as the thickness of the abrasive particles ( 2 ) occupied carrier body ( 1 ). Dental grinding wheel according to one of claims 1 to 6, characterized in that the carrier body ( 1 ) is made of metal. Dental grinding wheel according to one of claims 1 to 7, characterized in that the carrier body ( 1 ) is coated on both sides with the abrasive particles. Dental grinding wheel according to one of claims 1 to 8, characterized in that the carrier body ( 1 ) is coated in an annular region with the abrasive particles. Dental grinding wheel according to one of claims 1 to 9, characterized in that the carrier body ( 1 ) is provided with at least one recess.