Hybrid nano-resin esthetic crowns in primary teeth. Case report Coronas estéticas de nano-resina híbrida en dientes temporales. Reporte de caso

Within the field of dentistry, loss of primary teeth due to caries, pulp conditions and crown fractures has been recognized as one of the most severe etiological factors of dental problems in the pediatric dentistry fi eld. One of the greatest headways in dentistry in the last years encompasses the adhesion to enamel of primary teeth, this has led to the development of many techniques to restore the tooth. Obstacles that might be encountered are the presence of an aprismatic layer on the surface of primary teeth. This layer might reach 25 μ as well as the reduced amount of enamel present. Nevertheless, dentists might overcome these factors and manufacture esthetically-pleasing restorations. Crowns manufactured with composite resins and used in indirect techniques in the laboratory optimize physical and chemical characteristics and in general, polymerize with the use of physical means (light, heat, pressure, etc.). Therefore, they present smooth, pore-free surfaces, which allow for suitable esthetics, greater resistance to abrasion and proper adaptation. The aim of the present work was to present a clinical case of rehabilitation with indirect composite resin restoration (Signum-ceramis-Heraeus) and to show a technique for the rehabilitation of primary, upper anterior teeth which did not entail placement of provisional teeth. Rehabilitation of primary temporary teeth with nano-resin-hybrid crowns prefabricated in the lab represents a suitable option in the fi eld of pediatric dentistry.