Push-out bond strength of a self-adhesive resin cement used as endodontic sealer

Abstract

ObjectivesThe aim of the present study was to investigate the bond strength of RelyX Unicem (3M) to root canal dentin when used as an endodontic sealer.Materials and MethodsSamples of 24 single-rooted teeth were prepared with Gates Glidden drills and K3 files. After that, the roots were randomly assigned to three experimental groups (n = 8) according to the filling material, (1) AH Plus (Dentsply De Trey GmbH)/Gutta-Percha cone; (2) Epiphany SE (Pentron)/Resilon cone; (3) RelyX Unicem/Gutta-Percha cone. All roots were filled using a single cone technique associated to vertical condensation. After the filling procedures, each tooth was prepared for a push-out bond strenght test by cutting 1 mm-thick root slices. Loading was performed on a universal testing machine at a speed of 0.5 mm/min. One-way analysis of variance and Tukey test for multiple comparisons were used to compare the results among the experimental groups.ResultsEpiphany SE/Resilon showed significantly lower push-out bond strength than both AH Plus/Gutta-Percha and RelyX Unicem/Gutta-Percha (p < 0.05). There was no significant difference in bond strength between AH Plus/Gutta-Percha and RelyX Unicem/Gutta-Percha (p > 0.05).ConclusionsUnder the present in vitro conditions, bond strength to root dentin promoted by RelyX Unicem was similar to AH Plus. Epiphany SE/Resilon resulted in lower bond strength values when compared to both materials.

Influence of infected root dentin on the bond strength of a self-adhesive resin cement

“…The BS values obtained for specimens in the control group ranged from 6.35 MPa to 7.13 MPa, in agreement with previous studies that reported values between 4.56 MPa[ 23 ] and 9.3 MPa. [ 24 ] The presence of an intact dentin, clean and with unaltered structure, allows adequate entanglement of materials, which is fundamental for formation of the hybrid layer, characterized as the space corresponding to resin infiltration within the collagen matrix.…”

Effect of photon induced photoacoustic streaming (PIPS) on bond strength to dentine of two root canal filling materials

“…The difference in bond strengths between the two sealer systems tested was not unexpected. Previous literature has identified higher bond strengths of gutta‐percha and AH Plus compared to Resilon and RealSeal SE to dentin . The AH Plus sealer has a strong wetting effect, allowing it to penetrate into irregularities in the instrumented dentin and the open tubules in the root canal .…”

Push-out Bond Strength of Two Types of Dental Post Luted with Two Types of Cement at Two Different Root Levels

“…A research conducted by Yahya et al also showed that the highest bond strength was attained by RelyX TM Unicem as compared to Elite 100 ® zinc phosphate cement, Calibra and RelyX ARC resin cement ( 27 ). Apart from that, a good bond strength was obtained for RelyX TM Unicem ( 28 ). There are many possible explanations behind the superior bond strength of RelyX TM Unicem as compared to several other luting cements.…”