DE102004036000B4 - Inlay for a root canal of a tooth root of a tooth - Google Patents

Abstract

inlay (I) for a root canal (2) of a tooth root (1) of a tooth (Z), comprising an inlay body (6) with a longitudinal axis, its outer surface itself along the longitudinal axis from a larger cross-sectional area to a narrower cross-sectional area tapered, being the inlay body (6) with the root canal (2) substantially parallel longitudinal axis retrograde from the tip of the tooth root (1) into a root canal (2) is usable, the interior thereof by means of an ultrasonic tool is machinable and shaped, and wherein the outer surface of the inlay body (6) a substantially with a tip of the ultrasonic tool corresponding shape and the wider end of the inlay body (6) a collar (8) which is attached to an edge (9) of the tooth root (1) fügbar is.

Description

The The invention relates to an inlay for a root canal of a tooth root of a tooth.

Under an inlay is subsequently a fixed insert for a Tooth understood.

in the Generally, after a root tip resection becomes a retrograde one Endeavored to occlusion of the root canal. This can ideally an inlay can be used.

The Root tip resection is a technique introduced over a century ago for the treatment of periapical ophthalmos. A problem of this technique is the bacterial density retrograde closure of Wurzelamputationsstümpfen at an existing orthograde root filling. Usually, for the retrograde Closure plastic filling materials used, which is a difficult processing, an individual Error source through mixing processes and the danger of incomplete Obturation of the entire retrograde treatment length have.

With the introduction ultrasonically assisted Mineral processing instruments could the retrograde treatment length and technology can be significantly improved. There are different cements used, but the complete retrograde obturation material-related do not make sure.

Furthermore be for the obturation metallic pin systems used. These pens, made of silver or titanium, for example, become retrograde Direction partially introduced into the root canal. The can Reprocessing instruments are easily distracted in their movement, for example, by a curved channel course. Continue to be while oval root canals on their largest diameter processed, which means a loss of tooth substance. This is true too to the so-called transdental fixation, at the longer pins orthograde be passed through the root canal. In both cases the protrusion of the pins into the jawbone problematic there the danger of bone regression exists when at lateral tooth movements relatively high leverage act on the pin and transferred from this to the jawbone become.

From the DE 295 14 988 U1 For example, a rotationally symmetrical packing for introduction into a cavity created by a rotating preparation instrument in the root canal of a tooth is known, which has a maximum length of 3 mm, so that it is suitable for insertion into a retrograde cavity of a root canal. The filling body and the cavity can have a conical shape. The filler may consist of titanium.

This Filler is only for wells suitable, which are formed with rotating reparation instruments. He is also only partially suitable, a safe obturation of the root canal to effect while maintaining the stability of the tooth root.

The DE 198 00 789 A1 shows orthograde root posts for the restoration of damaged teeth and associated preparation moldings. The preparation molding and the preparation tool are adapted to the root canal.

The WO 94/16 640 A1 discloses dental treatment instruments for the retrograde treatment of root canals by means of ultrasound.

Of the Invention is based on the object, a retrograde einzusetzendes Inlay specify with which a safe obturation of a root canal with little effort and relatively fast, with the stability of the tooth root, without destroying tooth crown and enamel, should be preserved and starting points for Deposits and adhesions should be avoided.

The Task is according to the invention with a Inlay having the features specified in claim 1, solved.

advantageous Embodiments of the invention are the subject of the dependent claims.

The Inventive inlay consists of an inlay body tapering along its longitudinal axis (also Filler or Inlay Body called) and is processed in a retrograde ultrasound and shaped root canal can be used. It may be used for retrograde obturation industrially prefabricated with small tolerances, since it is attached to the Shape of the tips of the ultrasonic processing instruments adapted is. The advantages of this inlay are the exclusion of individual Sources of error when manually mixing cements, an optimized filling the recycled channels Due to the rigidity of the material, high stability and tightness of the material retrograde obturation and a higher density of filling the metal core of the root filling and the reduction of cement content to a gap.

By a collar on the larger cross-sectional area having the end of the inlay body is attachable to a formed in the tooth root edge, whereby on the one hand, the tightness of the root filling is improved and on the other a seamless transition between root tip and inlay body is very easy. Thus there are no attachment sites for bone adhesions the ones that could affect the bone loss just like pins. In addition, a defined position of the inlay body can be achieved by joining edge and collar.

A Size of the inlay body of 3 mm or more possible on the one hand the safe handling and processing of the inlay as well on the other hand a high strength stability of the filled tooth root with even force absorption and distribution of or on the natural tooth substance with chewing and grinding movements.

For as possible good adhesion of the inlay in the root canal and a sufficient Tightness of obturation is at least partially around the inlay body a filling arranged. At the same time lying within the root canal filling compound when pasting of the inlay body optimally compressed. A preferred filling compound is cement, the cheap in different variants is available.

The flush To lock of the inlay body his having a larger cross-sectional area End with the end of the tooth root prevents the formation of lobes Adhesions.

Preferably is the inlay body shaped essentially rotationally symmetrical, which makes it very easy is to produce. In addition, when inserting not on a special Situation, which speeds up the treatment.

In the case an oval root canal with appropriate preparation of the tooth root or root tip, the inlay body may be oval shaped. Also in this Shape is the inlay body easy to prepare and easy to insert into the tooth root.

One Inlay Body made of titanium causes a high so-called biocompatibility of the root canal filling, with In other words a good compatibility in the organism.

The Prefabricate the inlay body in several sizes, the on the outer shape turned off the tips of ultrasonic processing instruments are possible the cost-effective Production of inlays.

One Gap between the inside of a root canal and the inlay body (also Called packing) allows improving the adhesion of the body in the root canal, since adhesion-enhancing at these points filling compound can be arranged.

The Invention will be explained in more detail below with reference to exemplary embodiments.

In the associated Drawings show:

1 an inlay in a maxillary tooth,

2 an inlay with collar in a maxillary tooth,

3 an inlay with a rounded collar
and

4 an inlay with device for inserting the inlay.

1 shows a tooth root 1 a tooth Z with root canal 2 in the upper jaw 3 , In the upper jaw 3 becomes an access cavity 4 created for the inlay I through which the root tip resection at the tooth root 1 he follows. By means of an ultrasonic treatment instrument, the root canal is cleaned and brought into a regular, approximately conical shape, which corresponds to the outer shape, in particular the tip of the ultrasonic treatment instrument. The root canal 2 becomes retrograde with cement 5 filled. Subsequently, a body 6 (also inlay body 6 or packing called) in the root canal 2 pressed. Excess cement 5 is doing through the gap 7 pushed out and then preferably removed. The inlay body 6 is made of one-piece titanium, such as pure titanium or a titanium alloy, or gold, and is flush with the end of the tooth root 1 which prevents subsequent bone loss on the jawbone due to tooth movement. The inlay body 6 tapers off from a larger cross sectional area after insertion at the end of the tooth root 1 Towards a smaller cross-sectional area at the end of the retrograde prepared by the ultrasonic treatment instrument and shaped interior of the tooth root 1 lies. The larger cross-sectional area also forms the conclusion of the inlay body 6 and represents a flat, circular surface. The inlay body 6 is formed at a length of 4 mm in total rotationally symmetrical about its longitudinal axis. In case of oval root canals 2 and corresponding oval preparation of the root tip can also oval shaped inlay body 6 manufactured and used.

The gap 7 results from the manual processing of the root canal 2 with the ultrasonic processing instrument, since its outer shape dictates the shape of the interior. Any deviations in shape of the interior due to incorrect machining are caused by the cement 5 balanced.

In 2 an alternative embodiment for an inlay I is shown. The inlay body 6 also has a circumferential, edged collar 8th on, the one with his bottom 8.2 just on a corresponding, in the tooth root 1 incorporated edge 9 rests and so the gap 7 Bacteria seal closes. A change in position of the inlay body 6 relative to the root canal 2 , in particular further into this, is also excluded.

The internal pressure on the tooth root 1 is basically due to the contact pressure during insertion of the inlay body 6 in the root canal 2 certainly. Preferably, the contact pressure and thus the internal pressure by a collar 8th on the inlay body 6 limited. In both cases, the cement is 5 both in the gap 7 as well as in the remainder of the root canal 2 well compacted.

In 3 is the collar 8th at least partially rounded, with its top 8.1 flat for a flat finish and its bottom 8.2 rounded to the inclusion in a corresponding with the rounding, in the tooth root 1 worked recess. Such a recess has the advantage of being the inlay body 6 easily fixed when inserting.

Preferably, the inlay body 6 prefabricated in sizes and shapes, which corresponds to the outer shape of an ultrasonic processing instrument.

Also a slightly convex or concave curvature of the launching surface of the inlay body 6 at its end with a larger cross-sectional area is possible without the risk of serious bone loss. Essential, however, is the flush completion of the edge of the inlay body 6 with the end of the tooth root 1 (Root tip), so as not to create attachment points for deposits or adhesions.

Instead of cement 5 In principle, other fillers can be used if they are suitable for root fillings.

The insertion of the inlay may be exemplary as in 4 with the help of one with the inlay body 6 connected wire 10 take place, which preferably consists of the same material as the inlay body 6 , The wire 10 advantageously has a predetermined breaking point 11 on, on the wire 10 is disconnected after insertion. After curing the cement 5 becomes the inlay body 6 remaining remainder of the wire 10 at a separation point 12 largely separated. This procedure leaves a remnant of the wire 10 on the inlay body 6 which does not affect the healing process.

1

tooth root

2

root canal

3

upper jaw

4

access cavity

5

cement

6

Inlay Body

7

gap

8th

collar

8.1

top

8.2

bottom

9

edge

10

wire

11

Breaking point

12

separation point

I

inlay

Z

tooth

Claims (12)

Inlay (I) for a root canal (I) 2 ) of a tooth root ( 1 ) of a tooth (Z) comprising an inlay body ( 6 ) having a longitudinal axis, the outer surface of which tapers along the longitudinal axis from a larger cross-sectional area to a narrower cross-sectional area, wherein the inlay body ( 6 ) to the root canal ( 2 ) substantially parallel longitudinal axis retrograde from the apex of the tooth root ( 1 ) into a root canal ( 2 ), whose interior is machinable and shaped by means of an ultrasonic tool, and wherein the outer surface of the inlay body ( 6 ) a substantially corresponding with a tip of the ultrasonic tool shape and the wider end of the inlay body ( 6 ) a collar ( 8th ), which adjoins an edge ( 9 ) of the tooth root ( 1 ) is available. Inlay (I) according to claim 1, characterized in that the inlay body ( 6 ) along the longitudinal axis has a length of 3.0 mm or more. Inlay (I) according to claim 1 or 2, characterized in that around the inlay body ( 6 ) At least partially a filling material is arranged. Inlay (I) according to claim 3, characterized in that the filling compound is a cement ( 5 ). Inlay (I) according to one of the preceding claims, characterized in that the end of the inlay body ( 6 ) with the wider cross-sectional area along its circumference substantially level with the end of the tooth root ( 1 ) can be arranged. Inlay (I) according to claim 5, characterized in that the end of the inlay body ( 6 ) with the wider cross-sectional area as a flat surface is trained. Inlay (I) according to one of claims 1 to 6, characterized in that the inlay body ( 6 ) is formed substantially rotationally symmetric about the longitudinal axis. Inlay (I) according to one of claims 1 to 6, characterized in that the inlay body ( 6 ) is formed substantially oval. Inlay (I) according to one of the preceding claims, characterized in that the inlay body ( 6 ) consists of titanium. Inlay (I) according to one of the preceding claims, characterized in that the inlay body ( 6 ) is prefabricated in one of several sizes. Inlay (I) according to one of the preceding claims, characterized in that the inlay body ( 6 ) in a root canal ( 2 ) of a tooth root ( 1 ) can be arranged. Inlay (I) according to claim 11, characterized in that a between the inlay body ( 6 ) and the tooth root ( 1 ) formed gap ( 7 ) can be filled with filling material.