PMID- 35980241 OWN - Quintessenz Verlags-GmbH CI - Copyright Quintessenz Verlags-GmbH OCI - Copyright Quintessenz Verlags-GmbH TA - J Adhes Dent JT - The Journal of Adhesive Dentistry IS - 1757-9988 (Electronic) IP - 1 VI - 24 PST - epublish DP - 2022 PG - 325-333 LA - en TI - Effect of Light Emission Through an Optical Fiber Device on the Bond Strength of a Hollow Experimental Intraradicular Post LID - 10.3290/j.jad.b3240659 [doi] FAU - Inagati, Cristiane Mayumi AU - Inagati C FAU - Grangeiro, Manassés Tercio Vieira AU - Grangeiro M FAU - Rossi, Natália Rivoli AU - Rossi N FAU - Tribst, João Paulo Mendes AU - Tribst J FAU - Nakano, Leonardo Jiro Nomura AU - Nakano L FAU - de Carvalho, Paula Carolina Komori AU - de Carvalho P FAU - Paes Junior, Tarcisio José de Arruda AU - Paes Junior T CN - OT - dental posts OT - finite element analysis OT - light-curing of dental adhesives OT - luting OT - optical fiber. AB - Purpose: To evaluate the effect of irradiation with an optical-fiber device on the bond strength of hollow and partially opaque intraradicular posts. Materials and Methods: An optical-fiber accessory tip was attached to a light-curing unit to emit light through the central hollow of an experimental fiberglass post. The samples were divided into 4 groups (n = 80) according to the protocol (Variolink N [light cured] or Multilink N [dual-curing luting material]) and the light-curing mode (performed conventionally or with the optical fiber): GF: light-curing luting material; GFF: light-curing luting material and optical fiber; GD: dual-curing luting material; GDF: dual-curing luting material and optical fiber. The samples were tested immediately or after aging. Push-out bond strength, failure mode, degree of conversion (DC, assessed at the peak of 1750 cm-1), and stress distribution by finite element analysis were performed. Quantitative data were analyzed using 3-way ANOVA (luting material x light curing x depth) and 2-way ANOVA (aging x luting material), followed by Tukey’s test. Results: Bond strength was significantly affected by the luting material protocol (p < 0.001), depth (p = 0.010), and light curing mode (p = 0.031). The GFF group revealed higher bond strength in the middle and apical portions. The most frequent failure modes were adhesive in the apical portion for the GFF and GDF groups. The DC was higher for GF and GFF groups. Conclusion: Using the optical-fiber device led to superior bond strength results when a dual-curing luting material was used. AID - 3240659