Effects of cavity disinfectants on bond strength of an etch-and-rinse adhesive to water- or ethanol-saturated sound and caries-affected dentin

Abstract

Objective: To evaluate the effect of cavity disinfectants on the immediate microtensile bond strength (μTBS) of an etch-and-rinse adhesive to water-and ethanolsaturated sound and caries-affected dentin (CAD). Material and Methods: Thirty-six human molars were sectioned to expose 1/3 of the mid-coronal dentin surface. Sound (n = 18) and CAD (n = 18) specimens were divided into six groups each (n = 3): one positive control (sound), one negative control (CAD), and five experimental groups each. In the control group, dentin surfaces were bonded using an etch-and-rinse adhesive with a traditional water-wet bonding technique. In the experimental groups, ozone was applied before etching and chlorhexidine after etching. In the ethanol-wet bonding groups, acid-etched dentin surfaces were treated with ethanol. Following adhesive application and composite buildups, bonded specimens were sectioned to form sticks. Failure modes were analyzed using a stereomicroscope. Results: The water-wet bonded sound control group yielded the highest μTBS among all groups (p < 0.001). The lowest μTBS values were observed in the ozone groups (p < 0.05). The ethanol-wet bonded CAD group exhibited a higher μTBS than the water-wet bonded negative controls. Although compared to the positive control, chlorhexidine decreased the μTBS (p < 0.05), an increase with no significant difference was observed in the negative control (p > 0.05). Conclusions:The μTBS values of CAD were lower than those of sound dentin. Ethanol-wet bonding improved the μTBS of CAD. Ozone application reduced the μTBS in both sound and CAD; chlorhexidine improved the immediate μTBS after etching in CAD.

Effect of 2% Chlorhexidine Following Acid Etching on Microtensile Bond Strength of Resin Restorations: A Meta-Analysis

“…In the 24 h subgroup meta-analysis, as in the immediate follow-up group, chlorhexidine application did not influence microtensile bond strength. This is in agreement with the findings of several authors [24][25][26][27][28]30,31].…”

Effect of Cavity Disinfectants on Dentin Bond Strength and Clinical Success of Composite Restorations—A Systematic Review of In Vitro, In Situ and Clinical Studies

“…From all of the selected teeth, only dentin substrates were put to use in the experimental protocols and the majority of the authors used healthy dentin as a test substrate. However, some of the authors also used infected dentin [ 14 , 23 , 24 , 25 , 26 ] or dentin presenting with artificial caries [ 27 , 28 , 29 ] made possible by a laboratory caries-induction procedure. In addition, some studies referred the use of deep and/or superficial dentin [ 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 ], however in most of the included studies this differentiation was not pointed out.…”

“…As regards to the storage medium to preserve teeth after extraction until its use in the experimental procedures, most of the authors reported the use of thymol [ 15 , 17 , 18 , 25 , 28 , 35 , 36 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 , 69 , 70 , 71 , 72 , 73 , 74 , 75 , 76 , 77 , 78 , 79 ], chloramine [ 13 , 14 , 23 , 26 , 27 , 29 , 30 , …”

“…The majority of the authors [ 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 23 , 25 , 26 , 27 , 28 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 38 , 39 , 40 , 41 , 43 , 44 , 45 , 46 , 47 , 48 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 58 , 59 , 60 , 61 , 63 , 64 , 65 , 67 , 68 , 69 , 70 , 71 , 73 , 74 , 75 , 76 , 77 , 78 ,…”

“…Most of the studies reported results on the application of cavity disinfectant agents such as chlorhexidine [ 12 , 13 , 14 , 15 , 16 , 17 , 23 , 24 , 26 , 27 , 36 , 39 , 42 , 53 , 56 , 57 , 61 , 62 , 65 , 66 , 67 , 68 , 69 , 70 , 72 , 73 , 75 , 77 , 79 , 81 , 86 , 87 , 88 , 90 , 91 , 98 , 100 , 102 , 103 , 104 , 105 , 111 , 113 , 122 , 123 , 124 , 126 , 128 , 132 , 133 , 134 , 135 , 137 , 142 , 143 ,…”