Can Dentin Surfaces Be Bonded Safely With Ozone and Boric Acid?

Abstract

The aim of this study is to evaluate the effect of different cavity disinfectants on shear bond strength. In this study, 60 caries-free human molar teeth were used. Smooth dentin surfaces were revealed by cutting occlusal enamel and a standard smear layer was obtained by using 600-grid sandpaper. Specimens were randomly assigned to four groups according to the disinfectant used: Group 1: Control (no disinfectant); Group 2: Ozone; Group 3: Chlorhexidine, Group 4: Boric acid. Specimens were bonded using S3 Plus Bond and the composite buildups were created by using composite resin according to the manufacturer's instructions. After specimens were kept for 24 h, at 37 • C in distilled water, the shear bond strength test was measured with a universal test machine. The highest bond strength values were observed in the control group. The bond strength was significantly lower in the chlorhexidine, and boric acid-treated groups than it was in the control group (respectively, p = 0.046 and p = 0.028); however, no significant difference in the bond strength was observed between the ozone group and the control group (p = 0.444). The ozone group was detected as having the best shear bond strength values in groups which were applied to cavity disinfectants.

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

“…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 ,…”

“…The use of ozone as a cavity disinfectant was reported in five of the included studies [ 26 , 48 , 93 , 133 , 143 ]. Garcia et al [ 93 ] and Ercan et al [ 133 ] did not report a decrease in bond strength regarding restorations performed in ozone disinfected cavities. However, Rodrigues et al [ 48 ] reported a decrease in bond strength when the ozone was either used after or before the phosphoric acid application, describing a higher decrease in the latter.…”

“…Boric acid was reported in two of the studies [ 133 , 157 ]. Akturk et al [ 157 ], which evaluated its effects on adhesion when using it before a self-etch or a universal adhesive system, reported that there was a decrease in bond strength only when the boric acid was used before the universal system.…”

“…Akturk et al [ 157 ], which evaluated its effects on adhesion when using it before a self-etch or a universal adhesive system, reported that there was a decrease in bond strength only when the boric acid was used before the universal system. However, Ercan et al [ 133 ] reported a decrease in bond strength when testing the boric acid with a self-etch adhesive.…”

“…Ozone has also been proposed as a cavity disinfection method prior to restorative procedures since due to its oxidative and antimicrobial activity, it has the capacity to oxidize proteins in carious lesions and consequently diffusing and depositing calcium and phosphate ions into the demineralized dental tissues, hence leading to remineralization [ 48 , 143 ]. However, the results of the five included studies regarding the use of ozone are inconsistent since two authors [ 93 , 133 ] did not report a decrease in bond strength and the other three authors [ 26 , 48 , 143 ] reported opposite results even when testing either in healthy or infected dentin [ 26 , 143 ]. This might be due to the fact that ozone is an unstable molecule and rapidly dissociates into oxygen molecules which will react with free radicals and may cause the inhibition of polymerization of adhesive systems and thus reduce bond strength [ 26 , 48 ].…”