Title: 0468 - Performance of Universal-adhesives in Class V Cavities After Four-year Water-storage
Uwe Blunck (Presenter)
Paul Zaslansky, Charite University
Sebastian Paris, Charite University
Objectives: Evaluation of the effect on marginal adaptation of four universal-adhesive systems in Class-V-cavities after four-year-waterstorage.
Methods: Class-V-cavities were prepared in 80 extracted human teeth, 8 per group (approximately 4 mm high, 3 mm wide and 1.5 mm deep, one half of margin length located in dentin). Four universal-adhesives were used in self-etch (SE) and etch&rinse (E&R) applications: Scotchbond Universal (SU-S, SU-E), Adhese Universal (AU-S, AU-E), Futurabond U (FU-S, FU-E), Futurabond M (FM-S, FM-E). OptiBond FL (OF), and Clearfil SE Bond (CF) were used as control. All teeth were restored with the composite resin Filtek Z250.
To assess the marginal fit after 21 days of waterstorage (WS), after a first thermocycling of 2000 cycles, 5° to 55°C (TC1), after additional four-year WS, and after a 2nd thermocycling (TC2), impressions were made to produce replicas for quantitative margin analysis in the SEM, performed at a magnification of 200X using defined criteria.
Results: After TC1/TC2, median values of ”continuous margin” (% of total margin length in dentin) were: OF(100.0/95.1), CF(100.0/97.0), SU-E(100.0/93.2), SU-S(97.7/93.1) AU-E(97.2/93.6), AU-S(93.1/90.3) FU-E(97.4/92.1), FU-S(67,9.7/61,2) FM-E(96.5/91.0), FM-S(81.0/77.2). Kruskal-Wallis- and Bonferroni-tests analyses of TC2 revealed a statistically significant decrease in the amount of ”continuous margin” for FU and FM, when applied in the self-etching (SE) mode.
Conclusions: With the exception of FU-S and FM-S, all the tested universal-adhesives showed similar marginal adaptation results in dentin after 4 years of WS, with a performance that was as good as the “gold standard” products CF and OF.
The submitter must disclose the names of the organizations with which any author have a relationship, the nature of the relationship, and the clinical or research area involved. The following is submitted: None