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Can viscosity of acid etchant influence the adhesion of fibre posts to root canal dentine?
Author(s) -
Salas M. M. S.,
Bocangel J. S.,
Henn S.,
PereiraCenci T.,
Cenci M. S.,
Piva E.,
Demarco F. F.
Publication year - 2011
Publication title -
international endodontic journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.988
H-Index - 119
eISSN - 1365-2591
pISSN - 0143-2885
DOI - 10.1111/j.1365-2591.2011.01918.x
Subject(s) - bond strength , phosphoric acid , root canal , materials science , smear layer , scanning electron microscope , dentistry , composite material , layer (electronics) , adhesive , medicine , metallurgy
Salas MMS, Bocangel JS, Henn S, Pereira‐Cenci T, Cenci MS, Piva E, Demarco FF. Can viscosity of acid etchant influence the adhesion of fibre posts to root canal dentine? International Endodontic Journal , 44 , 1034–1040, 2011. Abstract Aim To evaluate the influence of acid viscosity, endodontic sealer and root canal region on the push‐out bond strength of a glass fibre post. Methodology Seventy‐eight single‐rooted human teeth were selected (60 for push‐out and 18 for scanning electron microscopy characterization, SEM, n = 13 per group). The root canals were prepared with a step‐back technique and then filled with Endofill or AH Plus sealer. Teeth without root fillings were used as controls. The preparation of the post‐space was to a length of 11 mm using standardized rotary instruments. The root dentine was treated with 37% phosphoric acid (gel or liquid). The fibre posts (Reforpost) were silanized, and resin cement (Enforce) was used for luting procedures. Each root was cross‐sectioned, and samples from the cervical and apical regions were subjected to a push‐out bond strength test. Specimens from each group were sectioned longitudinally and subjected to SEM characterization for the dentine/cement/post interface. Statistical analysis for push‐out tests was carried out using factorial anova followed by Tukey’s test ( P < 0.05). Results The three factors under evaluation (acid, endodontic sealer and region) and their interaction significantly influenced bond strength values ( P < 0.05). In general, liquid phosphoric acid had significantly higher bond strength values in the apical region ( P < 0.05), with hybrid layer formation, while endodontic sealers reduced bond strength values compared to the control ( P < 0.05). Conclusion The use of a liquid acid etchant created higher bond strength values in the apical region.