Method for reinforcing dental structures or prostheses

FIELD: medicine.

SUBSTANCE: method involves covering dental structures or prostheses with ribbon manufactured from fibers and coating it with filling material layer. The ribbon is manufactured from fluorine-containing copolymer monofiber of circular cross-section woven as ribbon as it is shown on dwg 1.

EFFECT: provided dental structure balanced life when splinting and high adhesion degree of prosthesis to filling material.

2 dwg

 

The invention relates to medicine, namely to prosthetic dentistry and can be used for splinting teeth with periodontitis.

An important factor in prosthetic dentistry is the choice of the system of fiber reinforcement, which would meet the following requirements: biocompatibility, ability to handling, durability and aesthetic appearance.

There is a method of splinting teeth with the locking thread (see RF patent №2151572, CL MKI And 61 With 13/00). In this way pre-make a circular cut in chinaswamy teeth, through which the locking thread is carried out around each shinerama tooth, then it is rigidly fixed and cut close with a filling material.

The disadvantages of this method are:

1. Do not want to cut on four tooth surfaces (circular cut), which leads to rapid wear of the tooth.

2. The need to use a thick layer of filling material, which leads to the formation of cracks, therefore, to rapid wear of tooth structure.

3. It is very difficult to evenly tension the floss around each tooth (almost impossible), a member of the bus, therefore, it is difficult to create ravnopolochnyy design and uniform distribution of the masticatory load.

There is also known a method of splinting teeth with the aid of the completion of the two locking threads (see RF patent №2157136, CL MKI And 61 With 8/00). In this way do the two circular cuts: one on the edge, as close as possible to the cutting edge and the second edge of the root part of the tooth.

This method has the same disadvantages as above described, only added another circular cut that enhances the above-mentioned disadvantages.

The closest analogue to the proposed technical solution to the technical essence and the achievable positive effect is "a Method of reinforcement of dental structures or prostheses (see U.S. patent No. 5176951, CL MKI And 61 With 13/09). The method consists in the fact that the teeth included in the bus, or dentures cause the fibers of aramid or high modulus polyethylene, pre-impregnated with resin, with subsequent closing of the fiber filling material. This patent describes the types of reinforcing materials, the choice of method of reinforcement depending on the topography of the dentition. Describe the two predominant types of fibers, which are widely used for reinforcement of dental structures and splinting of the teeth is fiberglass and cellulose fiber, it also describes the use of fibers made of heavy-duty polyethylene. Polyethylene fiber thus pretreated cold gas-discharge plasma, resulting in the preliminary oxidation of the surface is rnost fibers with the formation of hydroxyl and carboxyl groups on their surface. The presence on the surface of the fibers of these polar groups increases the adhesion to the resin and filling materials.

The disadvantages of the prototype is that:

1. Polyethylene fibers do not have sufficient adhesion to composite filling materials without special treatment of cold gas-discharge plasma. Economically disadvantageous to use such fibers, as special processing increases the cost of the fibers.

2. Most of the used fibers (aramid, polyethylene, cellulose) have a microfiber structure (staple), which makes uniform impregnation of the total volume of filaments ribbon with resin or restorative material, it makes possible the penetration of the fiber moisture and other liquids. All this leads to non-uniformity in the structure of the resulting tire and, therefore, to uneven distribution of load across the size of the tire. Tooth structure becomes neravnopolochny and short-lived. In addition, with this structure, the thread it can be split into separate fibers (cherepitsa), which leads to its rapid deterioration.

The technical result of the proposed technical solution is the creation of the tape, thereby providing shinirovanie teeth ravnopravnosti received dental designs or prosthesis with a high degree of adhesion to the sealing material when y is included preparation of hard tissue of teeth, and, as a result, increased durability, and therefore, the dental structures or dentures.

The technical result is achieved by the reinforcement of dental structures or prostheses performed using the tape, in which the fiber is made of fluorine-containing copolymer (based on the derivatives of floretina), while fibers in the ribbon woven a complex weave, there are unidirectional fibers, and between them is inserted intertwined fibers.

The use of fibers of the fluorine-containing copolymer gives the opportunity to increase their adhesion to all types of resins and filling materials without additional special handling cold gas-discharge plasma. This is achieved by the presence in the fluorine-containing copolymer of a large number of polar groups such as terminaciones group and not only on the surface, but throughout the fiber volume. The fiber is made of such a material is a monofilament, a round cross section. This provides a good impregnation resin and filling material total volume splinting ribbons.

The presence of fluorine atoms in the fiber material increases its thermal stability (above 100° (C) and chemical resistance with respect to the various active components of saliva and food. Thus, the table presents data on resistance of the fluorine-containing copolymer to some environments the M.

The resistance of fluorine-containing copolymer based on 1,1,5-trihydrateclavulanate to chemicals mouth.

Table
WednesdayThe indicator of strengthNote
salivaracks*
a solution of acetic acid 5%racks*
a solution of soda food 5-7%racks*
a solution of potassium permanganateracks*
alcohol 40%racks*
acetoneunstable**
sunflower oilracks*
Note:

* resistance is defined by the change of the strength properties of the fibers after 24-hour exposure in solutions. Were allowed to change in strength in the range of 2-3% of the original. The testing temperature of - 35°C.

** in acetone was swelling and destruction of the fiber. Data are shown for comparison.

The presence of polar groups on the surface and around the fiber volume provides a sufficient and stable adhesive strength of the impregnated tape to bond and plombe ovocnaru material. That is, the fiber is not withdrawn from the obtained model of the composite at his trial, but there was the destruction of the fibers in the area before or after the designated impregnation.

Complex weave in which weft threads are at an angle to the main thread, gives a material with higher strength characteristics, as there are fibers oriented relative to the main direction of the weave and do not have overlapping and bending of the fibers. This weave maximally prevents the development of cracks in the tooth structure, as it is dense and uniform network nodes at the intersections of the fibers.

The proposed tape for reinforcing dental structures or prosthesis depicted in the drawings, where:

figure 1 - the appearance of the finished tape,

figure 2 - cross section a-a, where it is shown that the fiber in cross section have a circular shape.

Example:

We experimentally was made a small sample of the proposed tape, monofilament which is made of fluorine-containing copolymer based on 1,1,5-trihydrateclavulanate and woven a complex weave. Produced reinforcement of tooth structure on the model in a known manner with the application of the proposed tape. Did the groove on the oral surface of the anterior teeth width used tape. Then this furrow protravel 37%orthophosphoric acid. Subsequently OST the TCA acid was washed away, the cavity is dried and impregnated bond. Next put in her pre-impregnated with the same bond our offered tape and closed it with a filling material.

The use of such tape, monofilament which is made of fluorine-containing copolymer can be obtained ravnopolochnyy durable tooth design. With long-term follow-up (more than one year) tooth design remained healthy, while the tooth structure using a known material of aramid yarns or high modulus polyethylene went out.

The method of reinforcement of dental structures or dentures by placing on them the tape, consisting of fibers, and coating it with a layer of filling material, wherein the tape is made of monofilament, of circular cross fluorine-containing copolymer, woven into the tape, as shown in figure 1.



 

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EFFECT: provided dental structure balanced life when splinting and high adhesion degree of prosthesis to filling material.

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