Premium
The effect of resin infiltration and oxidative pre‐treatment on microshear bond strength of resin composite to hypomineralised enamel
Author(s) -
Chay Pui Ling,
Manton David J.,
Palamara Joseph E.A.
Publication year - 2014
Publication title -
international journal of paediatric dentistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.183
H-Index - 62
eISSN - 1365-263X
pISSN - 0960-7439
DOI - 10.1111/ipd.12069
Subject(s) - enamel paint , sodium hypochlorite , bond strength , adhesive , dentistry , composite number , composite material , infiltration (hvac) , materials science , resin composite , medicine , chemistry , organic chemistry , layer (electronics)
Background Reduced bond strengths of resin composites to hypomineralised enamel increase restorative failure. Aim To investigate if the adhesion of resin composite to hypomineralised enamel can be improved by pre‐treatments: resin infiltration, oxidative pre‐treatment followed by a resin infiltration, or oxidative pre‐treatment. Design Twenty‐one enamel specimens in each of five Groups: 1) Normal enamel; 2) Hypomineralised enamel; 3) Hypomineralised enamel pre‐treated with a resin infiltrant, (Icon ® ); 4) Hypomineralised enamel pre‐treated with 5.25% sodium hypochlorite then treatment with resin infiltrant; 5) Hypomineralised enamel pre‐treated with 5.25% sodium hypochlorite. A resin composite rod was bonded to each specimen using Clearfil™ SE bond as the adhesive (hereafter termed ‘routine bonding’), then subjected to microshear bond strength ( MSBS ) testing. Results Overall, the mean MSBS between the five groups differed significantly ( P = 0.001). Pre‐treatment of hypomineralised enamel with 5.25% sodium hypochlorite with or without subsequent resin infiltration in Groups 4 and 5 prior to routine bonding resulted in increased mean MSBS compared to Groups 2 and 3, with mean MSBS values not differing significantly when compared to routine bonding to normal enamel. Conclusion Increased bond strength of resin composite to hypomineralised enamel was obtained by pre‐treatment of hypomineralised enamel specimens with 5.25% sodium hypochlorite with or without subsequent resin infiltration.