Experimental and clinical substantiation of the combined use of resin infiltrate and flowable composite material in minimally invasive treatment of dental fluorosis

BACKGROUND: To eliminate white spots in dental fluorosis, methods of remineralizing therapy, microabrasion, and infiltration are currently used, which have special features in this pathology because of the deep location of the hypomineralization zone.

AIM: To study the adhesive strength of a fluid composite filling material to the infiltrate ICON and tooth enamel in fluorosis and evaluate the results of the combined use of resin infiltration and composite material in the clinic.

MATERIALS AND METHODS: Adhesive tear strength tests of various materials were performed on 60 extracted teeth with fluorosis, such as lesions in the form of white spots. By random sampling, teeth with fluorosis were divided into four groups of 15 teeth each. To induce a defect that allowed for the study of adhesive strength using a sandblaster (Rondoflex, CAVO, Germany), an aluminum oxide powder with a particle size of 27 microns at a distance of 1 cm was treated in the center of the vestibular surface for 3 s.

RESULTS: The best indicators of adhesive tear strength were obtained using a universal adhesive system and a low-modulus composite material and combining an infiltrant and a low-modulus composite material containing a 10-methacryloyloxydecyl dihydrogen phosphate (MDP) monomer. The results of the experimental study indicated that the combination of an infiltrate and a low-modulus composite material based on MDP monomer can be a promising option in the minimally invasive treatment of dental fluorosis in the clinic. After the treatment following the previously described scheme, the examination after 1 month did not reveal disruption of the marginal fit and staining of the border and secondary caries; however, one case of sensitivity was noted. Upon examination after 1 year, no cases of violation of the marginal fit, development of caries along the boundaries of the treatment, and sensitivity were observed.

CONCLUSION: The results of the experimental clinical study indicated the high effectiveness of minimally invasive dental fluorosis treatment using a combination of infiltration and low-modulus composite material based on MDP monomer.