Effect of 2 % Chlorhexidine on Dentin Shear Bond Strength of Different Adhesive Systems: A 6 Months Evaluation

Abstract

; Lluis Giner 4 BRAVO, C.; SAMPAIO, C. S.; HIRATA, R.; PUPPIN-RONTANI, R. M. ; MAYORAL, J. R. & GINER, LL. Effect of 2 % chlorhexidine on dentin shear bond strength of different adhesive systems: A 6 months evaluation. Int. J. Morphol., 35(3):1140Morphol., 35(3): -1146Morphol., 35(3): , 2017. SUMMARY:This study evaluated the effect of chlorhexidine dentin treatment on shear bond strength (SBS) of adhesive systems after different storages. The work included 144 third molars that had their dentin exposed and were divided in 6 groups: G1 (ASB+CHX: Adper Scotchbond 1XT + chlorhexidine 2 % prior Primer); G2(ASB); G3 (APP+CHX: Adper Prompt L-Pop + CHX); G4(APP); G5 (SBU+CHX: Single Bond Universal + CHX); and G6(SBU). Resin build-up was performed and teeth were subdivided regarding storage times (n=8): 72 h, 3 and 6 months. Next, SBS test was performed. At 72 hours, all equivalent groups (same adhesive system, different dentin treatment) showed no significant difference in SBS (P≥.05). Self-etch adhesive groups (with or without CHX) presented lower SBS compared to other systems (P≤.05). After 3 and 6 months, all CHX-treated groups presented significantly higher SBS compared to equivalent non-treated groups (P≤.05). For both storage times, Single Bond Universal presented the highest SBS values within the same dentin treatment (P≤.05), while Adper Scotchbond and Adper Prompt-L-Pop were not significantly different among them, also within the same dentin treatments [3 months (with CHX: P=.966; without: P=.958) and 6 months (with CHX: P =.887; without: P=.990)]. CHX Dentin disinfection is indicated for all classes of adhesives studied.

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

“…In some of the studies other options for storage were considered such as artificial saliva [ 24 , 29 , 49 , 57 , 62 , 111 , 150 ], saline solution [ 37 , 125 ] and sodium hypochlorite [ 22 ]. Six authors [ 66 , 72 , 124 , 138 , 151 , 155 ] did not provide information on this matter. One of the authors, Silva et al [ 98 ], conducted a study on the effect of chlorhexidine and storage media on bond strength values.…”

“…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 ,…”

“…Regarding its performance as a cavity disinfectant, chlorhexidine presented with positive results in the majority of the studies [ 16 , 17 , 24 , 36 , 39 , 42 , 53 , 56 , 57 , 61 , 62 , 65 , 66 , 67 , 68 , 69 , 72 , 73 , 75 , 77 , 79 , 81 , 86 , 87 , 90 , 91 , 98 , 100 , 102 , 103 , 104 , 105 , 111 , 113 , 122 , 123 , 124 , 128 , 132 , 134 , 135 , 137 , 142 , 143 , 148 , 153 , 157 ], allowing for maintenance or even an increase in bond strength values. On the other hand, a few authors [ 14 , 15 , 26 , 27 ,…”

“…Say et al [ 39 ] and Campos et al [ 42 ] did not find differences between the use of an etch-and-rinse and a universal system as well as Akturk et al [ 157 ] who also did not find differences between a self-etch and a universal system. Bravo et al [ 123 , 124 ] also conducted studies testing the three different adhesive systems—etch-and-rinse, self-etch and universal—but find no differences between them. One other author tested the same universal system either as a self-etch or as an etch-and-rinse and concluded that bond strength values increased when using the universal system in etch-and-rinse mode and decreased when using it as a self-etch [ 102 ].…”

In vitro comparison of the immediate adhesive strength in dentin of three universal adhesive systems.

“…3 This pH range may be beneficial to adhesion to dentin. 2,5,9,11 These new materials can be applied with different techniques of acid etching (total etching, selective and selfetching) depending on the clinical situation and preference of the operator. 3,8,10 The technique of total engraving (for 20s) was used in the present study.…”