Method for restoring lateral incisors having defects covering 2/3 of crown part with wire reinforcement being applied

FIELD: medicine.

SUBSTANCE: method involves reinforcing crown part defect with wave-shaped wires. The wires are taken in advance from gold-coated metal network, Ѕ tooth root length long wire portion is twisted and fixed in the canal. Free ends of the wires are distributed along vestibular surface of tooth cutting edge and bent towards vestibular tooth surface 1-1.5 mm below the cutting edge. Free ends of the wires are fixed in oval tooth cavity on the vestibular tooth surface side. Artificial enamel layer is produced from macrofilled composite material anatomically matching in shape the incisor crown part, fixing the wave-shaped wires in composite material. Artificial dentine is produced from microfilled composite material.

EFFECT: high strength of incisor walls; long service life under chewing loading.

 

The invention relates to medicine, namely to the dentist, and can be used in the restoration of the lateral incisor defects 2/3 of the crown part with the use of reinforcement wires.

From public sources of information on the priority date for the application is known that the causes of the defect coronal part of the lateral incisors can be: carious damage to the tooth, non-carious lesion, traumatic atlam, the effects of prosthetic metal-ceramic crowns.

To restore the crown of the tooth preserved root in dentistry used artificial crowns based on the core or pin tumbler construction, direct and indirect restorations of light-cured composite material, optionally reinforced by a variety of helical structures (1-9).

In the prior art (EPO No. 056589 A1, 1993) known way to restore the crown of the tooth by applying a material for seals and a reinforcing element made in the form of staples. It appears that the known method is the closest to the technical nature of the stated (10).

The disadvantages of this method appear:

1) in complex technological manufacturing a reinforcing element, due to the complex spatial configuration of the bracket (weld or seamless gutter and lateral teeth, etc.);

2) it is necessary to manufacture several sizes of staples and use only a certain size;

3) in a limited area of reinforcement restorable tooth surface, which is determined by the geometric dimensions of the bracket and its configuration.

4) in the presence of different strength characteristics of the restored areas of the tooth;

5) any additional areas of heightened tension caused by the formation in the body of the tooth elements for fastening the bracket;

6) subject to paragraphs 4 and 5, the increased likelihood chips filling material from the walls of the restored tooth.

The objective of the invention is to develop a simple method of restoration of the lateral incisors, including reinforcement of the restored walls easy to manufacture tools - wavy wires, in which the above disadvantages would not be excluded completely.

The use of wavy wires for the reinforcement of the walls of the lateral incisors during restoration allows the restoration of the incisors during one visit of the patient.

Achieved while implementing the claimed invention the technical result is to increase the strength of the restored walls of the cutters due to volumetric reinforcement wavy wires, and to increase their longevity and in the perception of masticatory loads.

The technical result is ensured by the following factors:

1) due to the wave-shaped wires, which increases the retention of composite materials used in the restoration of the tooth, are excluded chipped and split the restored walls;

2) by placing wavy reinforcing wires in the environment of the composite increases the area of contact with the composite and increases the efficiency of the reinforcement;

3) through the use of gold-plated metal wires is achieved by matching the color of the artificial dentin;

4) through the use of wavy wires decreases the shrinkage of the composite material and improved marginal seal of composite to the tooth hard tissues;

5) due to the flexibility of the wavy wire formed in accordance with the form of a recovered cutter that provides uniform distribution of voltage at the root of the functional loads on the tooth;

6) due to the flexibility of the wavy wires provided reinforcement of the tooth crown, even in cases of curvature of the root canal;

7) due to the flexibility of the wavy wires eliminating the defect occurs during one visit, because the fabrication, fitting and fixing wires directly when conducting restoration.

The essence of the invention.

Proposed the first method involves pre-endodontic treatment of the tooth. The root canal should be filled about 1/3 of the length of the root and not have periapical changes.

Determines the color of the future restoration on the VITA scale. Is retraction of the gingival retraction thread for more access to the cervical part of the tooth crown. After gingival retraction on the remaining coronal tooth structure is formed cavity oval.

Then carry out the next stage of restoration is the reinforcement of the tooth crown wires. To do this, use wire wave form, previously deleted from gold plated metal mesh. Thus the required length of the wire is defined as the sum of the length of the root canal of the tooth and twice the height of the tooth crown.

Wire gather in a bunch, approaching to each other, and by clamping the braid from one end. The length of the twisted portion of the wires is not more than 1/2 the length of this channel. The diameter of the locking part of the wires form corresponding to the diameter of the root canal. If necessary, the diameter of the locking part can be adjusted in accordance with the size of the diameter of the root canal.

Thus, the hook part is formed of a bundle of wires, which is designed for fixing wires in the root canal of the tooth. Due to the flexibility of the wire-formed retaining portion also has the flexibility that is allows you to set the hook part even in the root canal with curvatures.

Next, adjust and try fixing this part. Thus the free ends of the wires are distributed in a “rolling” manner along the cutting edge of the tooth, approximately equal distance from each other. Using cement perform fixation fixing parts in the root canal and begin restoration of the tooth crown.

Distributed wire bent in the direction of the vestibular surface of the tooth so that the bend was 1-1 .5 mm below the cutting edge of the tooth. The free ends of the wires are placed in the previously formed cavity of the tooth crown. Due to the elasticity of the ends of the wires are fixed in the cavity by the vestibular surface of the tooth.

Of mechanically strong (microfilaraemia) composite from the oral surface of the tooth form of artificial enamel layer in accordance with the anatomical shape of the tooth. This “fan” distributed wires are placed in the environment of the composite artificial enamel layer and form repeat oral surface of the tooth crown. The space of the tooth crown, formed curved wires, fill microfilament composite, forming artificial dentin.

From microfilaraemia composite form of artificial enamel layer from the side of the vestibular surface of the crown h is I.

Thus, a restored crown part of the tooth consists of artificial enamel layer, reinforced curved wavy wires, and artificial dentin.

Renovated declared by way of teeth capable of chewing load. Due to the reinforcement of wavy wires, the strength of its walls increases are excluded chipped and split walls.

References

1. Borovsky E.V. and other Therapeutic dentistry. M.: Medicine, 1997. - Pp.163-168, 177-178, 196.

2. Galimov IU // Clinical experience with anchoring pegs to restore the crown of the tooth. Dentist practices. 2001. No. 1. - P.28-30.

3. Griban A.M. Elimination of traumatic defects crowns front teeth composite materials using parabolani pins. Dentistry. The Republican interdepartmental collection of the MOH of the USSR, 1988. - P.106-109.

4. George Friedman. // Aesthetic treatment using recovery methods on the pin. Clinical dentistry. 2001. No. 2. A. - P.10-15.

5. Kopeikin VP Guide prosthetic dentistry. M., 1998 - S.

6. Nikolaev A.I. Tsepov L.M. // Practical therapeutic stomatology St. Petersburg - 2001

7. Svetlov AV, kosicina SR // Experience with root pins system COSMOPOST. Scientific - practical journal Tool is here dentistry - 2000. No. 1. - P.28-30.

8. Olesov V.N., // Biomechanical and clinical rationale pin design on fiberglass. Panorama prosthetic dentistry. 2000. - P.4-6.

9. Jordan R.E. // Composite filling and lining materials in dentistry. Averina, Vinesparc. / Kyiv - 2001 - C.200.

10. Patent application EPO No. 0565899 A1, CL And 61 With 5/00, 1993 - close equivalent.

The way of restoration of the lateral incisor defects 2/3 of the tooth crown with the use of reinforcing wires, including pre-endodontic treatment of the tooth, the gingival retraction and formation of the oval cavity on the remaining coronal tooth structure, the fixation in the root canal wavy wires, pre-extracted from gold-plated metal mesh and twisted between a length of not more than 1/2 the length of the root canal, the distribution of free wires along the cutting tooth and the bending of the free ends in the direction of the vestibular surface of the tooth by 1-1 .5 mm below the cutting edge, and placing the free ends of the wires in the oval cavity of the tooth from the vestibular surface, and fixing the wires placed in the coronal part of the tooth in the environment of artificial enamel layer formed in accordance with the anatomical shape of the coronal part of the cutter from microfilaraemia composite material, and shaping the s in the space between the wires of the artificial dentin from microfilariae composite material.



 

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