DE29604657U1 - Sulcus opener - Google Patents

Description

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12 March 1996 MN/wi

Applicant: DEVE Dental-Vertrieb GmbH, D-78532 Tuttlingen

Name: Sulcus opener

Description

The invention relates to a dental instrument consisting of a rod-shaped handle part and at least one working part which is arranged at the end of the handle part.

In dentistry, cracks in the gums often occur when a tooth is extracted. These cracks in the gums during extraction are caused by fiber bundles running through the gums, the so-called gingival fibers, which create a connection between the gums and the root surface. During extraction, the fiber bundles are not severed directly at the root surface or the neck of the tooth, but because of their strong adhesion to the root cement and the gums, the gums are torn at the gum line before the fiber bundles are torn off. These cracks in the gums or the gum line prevent smooth healing after a tooth is extracted.

Furthermore, these fiber bundles prevent the jaws of extraction forceps from being placed in the immediate root area or the tooth neck area, as these areas are covered by the gums via the gingival fibers. However, it is particularly important to place the jaws as deeply as possible in order to avoid crown fractures, for example. Furthermore, such a deep placement in the area of the tooth neck or as close to the tooth root as possible is also desirable in the case of deeply fractured teeth, in order to be able to extract teeth that are damaged in this way without, for example, having to be chiseled out and removed in individual pieces.

The invention is therefore based on the object of creating a dental instrument by means of which injuries to the gums can be safely prevented during tooth extraction.

The object is achieved according to the invention in that the working part is formed on a holding section of the handle part that tapers towards the end and forms a curved spatula-like cutting blade that has a curved cutting edge that lies in a cutting plane that runs obliquely to the longitudinal center axis of the handle part, the curvature of the cutting blade with its cutting edge being adapted approximately to the shape of a tooth neck and

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used to cut through the connecting fibers that connect the gums and the tooth surrounded by the gums or the connecting fibers that connect two adjacent teeth.

With the spatula-like cutting blade according to the invention, the fiber bundles between the gums and the root surface can be easily and controlledly severed. This controlled severing of the fiber bundles before the extraction of a tooth reliably prevents the gums surrounding the tooth to be extracted from being torn by the fiber bundles during the extraction. The curved design of the cutting blade and the correspondingly curved course of the cutting edge ensure that the shape is adapted to the respective tooth shape, so that the fiber bundles can be severed by simply inserting the cutting blade between the tooth and gums. After this separation process using the dental instrument according to the invention, the affected tooth can be gripped extremely deeply with the jaws of the extraction forceps, since the gums, which are no longer connected to the root element, can be pushed downwards along the root element towards the tooth root and the tooth can thus be gripped extremely deeply. This reliably prevents crown fractures. Furthermore, this procedure also makes it possible to treat a deeply fractured tooth

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deeply gripped, so that no chiseling out of the tooth is necessary.

The double-angled design of the holding section and the course of the cutting plane of the blade at a working angle α of approximately 30 to 90° to the longitudinal center axis of the handle part according to claim 2 as well as the right-angled course of the cutting edge of the cutting blade to the longitudinal center axis of the cutting blade ensure optimal handling of the dental instrument.

The one-piece design of the handle part, the holding section and the cutting blade according to claim 4 ensures extremely cost-effective production.

The design of the dental instrument according to claim 5, in particular the mirror-symmetrical arrangement of the two cutting blades, ensures that all fiber bundles between the gums and a tooth to be extracted are severed by simply turning the dental instrument, i.e. by alternately using one or the other cutting blade, with one cutting blade preferably being used, for example, to severe the outer fiber bundles and the other cutting blade to severe the inner fiber bundles.

The invention is explained in more detail below with reference to the drawing. It shows:

Fig. 1 shows a dental instrument according to the invention in plan view;

Fig. 2 is a side view II of Fig. 1;

Fig. 3 one of the cutting blades of the dental instrument from Fig. 1 in perspective view.

Fig. 1 shows an embodiment of a dental instrument 1 according to the invention, which has a central, rod-shaped handle part 2, at the two ends 3, 4 of which a holding section 5 or 6 is arranged. The holding sections 5, 6 taper in their respective cross-section towards the respective outer end 7 or 8 of the holding sections 5, 6 and have a wire-shaped, approximately circular cross-section at this respective end 7 or 8.

A spatula-like cutting blade 9 or 10 is integrally formed on the respective outer ends 7 and 8 of the respective holding section 5 and 6. Each of the cutting blades has a cutting edge 11 or 12, which lies in an associated cutting plane 13 or 14, which is each at a working angle α to the longitudinal center axis 15 of the handle part 2.

which in the present embodiment is 37.5°. This working angle α can take on values between 30° and 90°, whereby the choice of the working angle α depends on the location of the dental instrument. This means that, for example, when using the dental instrument to cut through fiber bundles of a molar lying deeper in the oral cavity, a working angle of, for example, 30° can preferably be provided in order to ensure optimal handling of the instrument.

To use the dental instrument, for example in the area of the freely accessible incisors, it can be advantageous to select a working angle α of 90° or at least approximately 90° in order to ensure optimal handling of the dental instrument according to the invention. In order to further ensure optimal handling of the dental instrument, the cutting blades are designed to be approximately trapezoidal and widen towards their cutting edge 11 or 12.

As can be seen from Fig. 2, the cutting blades 10 and 11 are arranged mirror-symmetrically at the respective end 7 and 8 to each other with respect to the longitudinal center plane 16 of the handle part 2. The curved design of the cutting blades 9 and 10 can also be seen from Fig. 2, whereby

the cutting edges 11 and 12 have a corresponding curved course. This curved design of the cutting blades 9 and 10 and the curved course of the cutting edges 11 and 12, whose radius of curvature or curvature radius is approximately adapted to the tooth shape of a tooth to be extracted, enable a safe cutting of the fiber bundles between the gums and the tooth to be extracted by simply inserting them between the gums and the corresponding tooth, whereby the curved course does not cause any injuries to the gums. The corresponding radii of curvature or curvature that can be provided depend essentially on the tooth shape, whereby different radii of curvature or curvature can be provided for different dental instruments, so that the different design of these radii means that the dental instrument can also be used for different tooth shapes.

Fig. 3 shows the perspective view of the cutting blade 10, which is arranged at the outer end 8 of the holding section β. The cutting blade is widened towards its cutting edge 12. Furthermore, the curved course of the cutting edge 12 is also evident from Fig. 3. The cutting blade 10 is integrally formed on the holding section 6, whereby the production of the

Cutting edge 10 can be achieved by a simple pressing or forging process.

The individual components of the dental instrument according to the invention, namely the handle part 2, its two holding sections 5 and 6 as well as the cutting blades 9 and 10 formed on the holding sections 5 and 6, can be formed in one piece.

As can be seen from Fig. 1, in order to further improve the optimal handling of the dental instrument according to the invention, the holding section 5 or the holding section 6 is designed with a double angle so that even deeper teeth in the oral cavity can be reached without any problem. The cutting edges 11 and 12 run at right angles to the longitudinal center axis 17 or 18 of the respective associated cutting blade.

The dental instrument 1 according to the invention provides an instrument with which it is possible in the simplest way to cut through the fiber bundles that connect the gums to the tooth in a controlled manner, so that no cracks can form in the gums during the subsequent extraction process of the tooth. This advantageously ensures that the subsequent healing process of the resulting wound proceeds optimally. Furthermore, the controlled cutting through of the fiber bundles prevents the tooth from being pushed back.

gums along the tooth up to its root area or neck area, so that the jaws of an extraction forceps can be placed extremely deep into the root area of the tooth for extraction, so that crown fractures, for example, can be safely avoided. Furthermore, by placing the jaws of the forceps so deep on the tooth to be extracted, even a deeply fractured tooth can be extracted, as it can be grasped in its still healthy, unaffected area with the extraction forceps.

Claims (5)

12 March 1996 MN Applicant: DEVE Dental-Vertrieb GmbH, D-78532 Tuttlingen Description: Sulcus opener Protection claims 1. Dental instrument consisting of a rod-shaped handle part and at least one working part which is arranged at the end of the handle part, characterized in that that the working part (9, 10) is formed on a holding section (5, 6) of the handle part (2) that tapers towards the end and forms a curved spatula-like cutting blade (9, 10) that has a curved cutting edge (11, 12) that lies in a cutting plane (13, 14) that runs obliquely to the longitudinal central axis (15) of the handle part (2), the curvature of the cutting blade (9, 10) with its cutting edge (11, 12) being adapted approximately to the shape of a tooth neck and serving to sever the connecting fibers that connect the gums and the tooth that is surrounded by the gums or the connecting fibers that connect two adjacent teeth. 2. Instrument according to claim 1, characterized in that the holding section (5, 6) is bent twice —2— . V '♦ 5 - 2 - is formed and the cutting plane (13, 14) of the cutting edge (11, 12) runs at a working angle (α) of approximately 30° to 90° to the longitudinal central axis (15) of the handle part (2). 3. Instrument according to claim 1 or 2, characterized in that the cutting edge (11, 12) of the cutting blade (9, 10) runs approximately at right angles to the longitudinal central axis (17, 18) of the cutting blade (9, 10). 4. Instrument according to one of claims 1 to 3, characterized in that the handle part (2), the holding section (4, 5) and the cutting blade (9, 10) are formed in one piece. 5. Instrument according to one of claims 1 to 4, characterized in that a holding section (5, 6) with a cutting blade (9, 10) is provided at each end (3, 4) of the handle part (2), the two cutting blades (9, 10) with their curvatures being arranged approximately mirror-symmetrically with respect to a longitudinal center plane (16) of the handle part (2).