Experimental evaluation of the galvanophoretic dentin nanoimpregnation for recurrent caries prevention

Abstract

Aim to study the dentine galvanophoretic impregnation with nanoparticles of coppercalcium hydroxide (CCH) in the teeth with carious cavities. Material and methods. The study was conducted on 21 teeth removed for various medical indications, with a concomitant diagnosis "dental caries". After mechanical treatment, the cavities were washed with saline solution, then CCH paste was placed on the cavity floor, covered with aluminum foil, drained and isolated with temporary fillings. To maintain the osmotic balance, the teeth were placed in a laboratory model: a plastic bath with saline solution and a melamine sponge, for a period of 1, 14 and 30 days. Then the longitudinal teeth sections were prepared for the electron microscopic examination. Results. During the CCH galvanophoresis, the dentine impregnation with copper nanoparticles in the area of cavity floor occurred already during the first day of the procedure. The penetration depth reached 10.1 microns. The maximum depth of penetration of particles into the dentin (up to 30 microns) was detected after the 30-days-galvanophoresis. The maximum values of the diffusion coefficient and its velocity were recorded after the first day. With an increase in the time of galvanophoresis to 14 and 30 days, these indicators decreased. Conclusion. The described method may be used as an option of choice for the prevention of recurrent dental caries, especially in the presence of deep cavities.