02447nab a2200277 a 4500003000900000005001700009008004100026100002200067700002300089700002500112245008400137264000900221300001600230520163200246650003501878650002701913650002101940650004301961650002702004773005402031942000802085035001502093001000702108999001902115040003502134AR-ReUNN20260702004756.0260701s2023    ag |||||||||||||||||spa  1 aBaena, E.91994661 aFlores, A.91392811 aCeballos, L.919946710aInfluence of root dentin treatment on the push-out bond strength of fiber posts 1c2023  a8 páginas  aThe aim of the present study was to assess whether different dentin conditioning protocols with different acids [phosphoric acid, ethylene diamine tetra acetic acid (EDTA), and polyacrylic acid (PAA)] influence the bond strength of fiber posts along the radicular depth when luted with self-adhesive resin cement. Twenty single-rooted teeth were randomly divided into four experimental groups (n = 5) according to dentin treatment: Group 1: no treatment; Group 2: etching with 35 % phosphoric acid for 10 s; Group 3: 17 % EDTA application for 60 s; and Group 4: conditioning with 25 % PAA for 30 s. RelyX Fiber Posts were luted with the self-adhesive resin cement RelyX Unicem 2 Automix (3M ESPE). Roots were transversally sectioned into nine 1-mm thick specimens, three corresponding to each root third and a push-out test was performed. Data were analyzed by two-way ANOVA and Tukey test (p < 0.05). Failure mode was determined and specimens with representative failures for each group were observed under scanning electron microscopy. According to the results, dentin treatment influenced the bond strength (p < 0.001), whereas the root third did not (p > 0.05). Fiber posts luted after treating dentin with phosphoric acid, and PAA exhibited the highest push-out bond strength values, while the lowest were obtained after EDTA application. Intermediate results were obtained when dentin was not conditioned. In conclusion, the bond strength of the self-adhesive resin cement RelyX Unicem 2 improves when root dentin is treated with 35 % phosphoric acid or 25 % PAA, before fiber posts luting irrespective of the root depth. 4aTratamiento de Dentina9199468 4aPoste de Fibra9199006 4aExpulsar9199469 4aCemento de Resina Autoadhesivo9199470 4aCapa de Frotis91994710 tOdontologyx1618-1247gv. 105 n. 2 (2017)w257190  cART  a(ODN)65693266532  c266532d266532  aAR-ReUNNbspacAR-ReUNNeaacr2