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Effect of solvent evaporation strategies on regional bond strength of one‐step self‐etch adhesives to root canal dentine
Author(s) -
Thitthaweerat S.,
Nakajima M.,
Foxton R. M.,
Tagami J.
Publication year - 2013
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/iej.12093
Subject(s) - bond strength , adhesive , materials science , root canal , evaporation , composite material , root (linguistics) , dentistry , medicine , physics , thermodynamics , linguistics , philosophy , layer (electronics)
Aim To evaluate the efficacy of different solvent evaporation strategies on bonding of one‐step self‐etch adhesives to root canal dentine. Methodology Two dual‐cure resin core systems ( C learfil DC B ond/ C learfil DC C ore A utomix and C learfil T ri‐ S B ond P lus/ C learfil DC C ore P lus; K uraray N oritake D ental, T okyo, J apan) were equally applied in 24 post spaces from extracted human mandibular premolars. After the adhesive application, specimens were randomly assigned into four water/solvent evaporation strategies as follows ( I ) insertion of absorbent paper point for 10 s: P , ( II ) 10 s air‐blowing: A , ( III ) as ( II ) followed by insertion of absorbent paper point: AP , ( IV ) as ( III ) followed by 10 s additional air‐blowing: APA . Then, the adhesives were light cured, and resin core materials were placed into the post space, followed by light curing for 60 s. After water storage for 24 h, 0.6 × 0.6 mm‐thick beams were prepared to measure the regional μ TBS . The mode of failure was also observed. The μ TBS values were statistically analysed using three‐way anova and D uncan HSD test ( α = 0.05). Results In the coronal region, there were no significant differences in μ TBS between each evaporation strategy ( P > 0.05), except P group. However, in the apical region, APA and AP groups significantly increased in μ TBS compared with A and P groups ( P < 0.05). Only in the APA group of C learfil T ri‐ S B ond P lus/ C learfil DC C ore P lus, was there no significant difference in μ TBS between the coronal and apical regions ( P > 0.05). Conclusion The use of paper points with additional air‐blowing for removing excessive adhesive and evaporating residual water/solvent would be effective in producing higher bond strength for the tested one‐step self‐etch adhesives and fewer blister formations in deeper regions of the post space.