Method and Device for the Vibrational Mechanical Activation of Composite Materials

Abstract

The invention relates to the field of dentistry and is used for reinforcing composite materials to eliminate various defects of dental hard tissues of carious and non-carious origin in the process of direct / indirect and reinforced / non-reinforced composite restorations. The claimed method includes vibrational mechanical activation of composite materials by vibrationally acting upon portions of composite material shaped by manual mechanical activation (e.g., roll / ball) and applied layer-by-layer to the region of a defect. A device for vibrational mechanical activation of a composite material includes at least one working portion for applying a composite material to the region of a defect, the working portion fixedly attached to a handle, which is connected by a framework to a micromotor that creates vibrations which are transferred via the working portion to a layer of composite material by distributing the same across the entire surface of the defect and achieving the simultaneous surface plastic deformation thereof.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation of U.S. patent application Ser. No. 15 / 082,140, filed on Mar. 28, 2016, which is a continuation-in-part of International Patent Application No. PCT / RU2014 / 000975, filed on Dec. 23, 2014, which claims priority to and benefit of Russian Patent Application No. 2013147270, filed on Oct. 23, 2013, the disclosures of which are incorporated herein by reference in their entirety.BACKGROUND[0002]Field[0003]The invention relates to the field of dentistry and can be used to repair defects of dental hard tissues of the carious and non-carious origin, in the process of direct or indirect restorations with reinforced and non-reinforced composites.[0004]Related Art[0005]Continuous development of adhesive technologies facilitated popularization of the usage of composite materials in stomatological practice. Currently, there are many chemical and light curing composite materials.[0006]In clinical practice, light-curing c...

AI Technical Summary

Benefits of technology

VMA significantly reduces porosity by 70%, decreases critical pore size by 45%, and increases the load limit by 22.5%, resulting in stronger, more durable composite restorations with reduced complications and extended functional life.

Problems solved by technology

Despite the obvious advantages, composite materials have a number of drawbacks typical to any artificial material used in stomatological practice.

There are a number of complications possible after repairing of defects of dental hard tissues by using composite materials.

One of the main reasons for occurrence of splits of composite restorations is large (critical) defects of the type of pores.

The polymerization reaction is not possible in the layer, since the formation of the polymer matrix occurs only through the oxygen bonds, which are already occupied with oxygen in this layer.

If there is a non-polymerized layer between the layers of the composite, then the portions of the composite do not join to each other, so the junction interface becomes the place of mechanical weakness of the restoration and subsequent dissection of the restoration under the load of chewing.

At high loads, they may be unstable, capable of rapid growth and merging with each other with the formation of major cracks that lead to the destruction of composite restorations.

It is known from the literature that the main difficulties in applying of the first layer of the composite material to the bottom of the tooth cavity are associated with sticking of the composite to the tool and with the formation of voids between the composite material and the adhesive layer.

This method does not provide the maximal squeezing of air with the tool out of the pores of the applied composite layer surface.

The disadvantage of this method is that during its implementation the pores are redistributed, as a rule, within the material due to their displacement by the smoothing mechanical action of the tool.

At the same time, the insignificant squeezing of the air out of the pores is non-uniform over the entire surface of the deformable material due to the lack of the uniformly controlled force impact of the restoration tool upon the surface of the applied composite material.

The disadvantage of this method of manual mechanical activation lies in that shaping the composite material in the form of a roll in the course of the restoration is applied mainly during the restoration of missing walls of the crown part of the tooth, or during the repairing defects in the cutting edge of the tooth.

The effect of increasing the strength of the composite restoration, achieved by using the known method, is not sufficient to obtain monolithic composite restoration (MCR).

In the course of the repairing defects of dental hard tissues using the composite material by way of applying the claimed method, the layers of the composite material are subjected to vibrational impact (vibrational surface plastic deformation).

the probability of complications and prolongs the operational life of the composite restoration;

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