A device for vibrational mechanical activation of a composite material in direct or indirect layer by layer composite restoration, the device comprising at least one working part for applying the composite material to a defect area of a tooth or upon a surface of a previously applied and polymerized composite layer, wherein the at least one working part is fixedly attached to a handle, wherein the handle is formed as a tubular body provided with a button of an activating element for actuating a battery power supply, electrically connected to a micromotor, generating vibrations, which through the at least one working part are transmitted to a layer of the composite material through its distribution over the entire surface of a defect of the tooth or upon the surface of the previously applied and polymerized layer and simultaneous surface plastic deformation,
- wherein the battery power supply and the micromotor are placed in a framework, removably attachable to the tubular body by a fixing appliance in an opening of a window made on a lateral surface of the tubular body.