Evaluation of Bonding Performance: A New One-step Self-etching Adhesive System

Objectives: Recently, a newly developed one-step self-etching adhesive system(Brush&Bond Universal) has been introduced to the market. In this study, shear bond strength to tooth, metal and ceramic and resin-coating durability were compared with other commercially available same class adhesives.
Methods: Three bonding systems were evaluated: (1)Brush&Bond Universal(BBU),Parkell, (2)Scotchbond Universal(SU),3M and (3)All Bond Universal(AU),Bisco.
For the shear bond strength(SBS) test by Ultradent-method, dentin from extracted human tooth, metal(gold alloy(G)) and ceramic (lithium disilicate(L)) were bonded with these adhesive systems according to the manufacture’s instruction and resin composite(Filtek Supreme,3M) was built up onto it (n=5/system/adherend). After visible-light irradiation, the specimens were tested for the SBS. Data were analyzed using one-way ANOVA and Tukey’s test.
For the resin-coating durability, light-cured coating film was prepared on the bovine dentin (n=2/system) as above and tooth brush abrasion test was conducted(30,000 round trips). Abraded dentin was stained(iron/tannin solution), then morphological micrographs(optical, x30) of entire surface were evaluated for the durability of resin-coating.
Results: BBU showed no significant difference in SBS to G, but had higher SBS if bonded to L(P<0.05). BBU and SU had significantly higher SBS to dentin than AU(P<0.05)(Table). The micrographs of tooth brush abrasion test revealed that dentin coated with BBU and SU were hardly exposed, whereas AU showed exposure.
Conclusions: These findings indicated that SBS of BBU to dentin or ceramic were better than AU and better or comparable to SU. In terms of resin-coating durability, BBU was comparable to SU and better than AU. It is suggested that BBU is useful adhesive system for clinical use.