* Effects of Er:YAG and Er,Cr:YSGG laser irradiation on the adhesion to eroded dentin.
- Limited information is available regarding the adhesion to eroded dentin. This study aims to evaluate the effect of different surface treatments on eroded dentin morphology and on microtensile bond strength (μTBS) of adhesive systems to this substrate. Ninety-six extracted third molars were randomly divided into eight groups (n = 12) according to the type of surface treatment and the adhesive system: G1 = Control + Clearfil SE Bond [SE], G2 = Diamond bur [DB] + SE, G3 = Er:YAG laser (60 mJ, 2 Hz, 0.12 W, 19.3 J/ cm(2)) + SE, G4 = Er,Cr:YSGG laser (50 mJ, 30 Hz, 1.5 W, 4.5 J/ cm(2)) + SE, G5 = Control + Single Bond [SB], G6 = DB + SB, G7 = Er:YAG + SB, G8 = Er,Cr:YSGG + SB. The erosive cycling was performed by immersion in 0.05 M citric acid (pH 2.3, 10 min, 6x/day) and in supersaturated solution (pH 7.0, 1 h, between acid attacks), during 5 days. Blocks of composite were bonded to the samples according to the manufacturers' instructions. After 24 h-storage in distilled/deionized water (37 °C), stick-shaped samples were obtained and submitted to μTBS test. Each surface treatment was analyzed under scanning electron microscopy (n = 4) and the bond strength values (megapascal) were analyzed by two-way ANOVA and Tukey tests (α = 0.05). All surface treatments lead to changes on eroded dentin. G4 showed the highest bond strength mean (28.3 ± 9.2 MPa), which was statistically significant higher than all the other groups (p < 0.05). The surface treatment with Er,Cr:YSGG laser irradiation (4.5 J/cm(2)/50 mJ/30 Hz/140 μs) prior to bonding with a self-etching adhesive system significantly increases adhesion to eroded dentin, as compared to conventional treatment.
Overview of verb show
The verb show has 12 senses (first 11 from tagged texts)
1. (136) show, demo, exhibit, present, demonstrate -- (give an exhibition of to an interested
audience; "She shows her dogs frequently"; "We will demo the new software in Washington")
2. (63) prove, demonstrate, establish, show, shew -- (establish the validity of something, as by an
example, explanation or experiment; "The experiment demonstrated the instability of the compound";
"The mathematician showed the validity of the conjecture")
3. (57) testify, bear witness, prove, evidence, show -- (provide evidence for; "The blood test
showed that he was the father"; "Her behavior testified to her incompetence")
4. (43) show -- (make visible or noticeable; "She showed her talent for cooking"; "Show me your
etchings, please")
5. (32) picture, depict, render, show -- (show in, or as in, a picture; "This scene depicts country
life"; "the face of the child is rendered with much tenderness in this painting")
6. (24) express, show, evince -- (give expression to; "She showed her disappointment")
7. (24) indicate, point, designate, show -- (indicate a place, direction, person, or thing; either
spatially or figuratively; "I showed the customer the glove section"; "He pointed to the empty
parking space"; "he indicated his opponents")
8. (11) show, show up -- (be or become visible or noticeable; "His good upbringing really shows";
"The dirty side will show")
9. (7) read, register, show, record -- (indicate a certain reading; of gauges and instruments; "The
thermometer showed thirteen degrees below zero"; "The gauge read `empty'")
10. (6) show -- (give evidence of, as of records; "The diary shows his distress that evening")
11. (2) usher, show -- (take (someone) to their seats, as in theaters or auditoriums; "The usher
showed us to our seats")
12. show -- (finish third or better in a horse or dog race; "he bet $2 on number six to show")
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