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KMID : 0358920190460030274
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Journal of the Korean Academy of Pedodontics
2019 Volume.46 No. 3 p.274 ~ p.282
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Effect of Saliva Decontamination on Bond Strength of 1-step Self-etching Adhesives to Dentin of Primary Posterior Teeth
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Lee Jun-Hee
Kim Shin
Jeong Sung-Hee
Shin Jong-Hyun
Lee Eun-Gyung
Kim Ji-Yeon
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Abstract
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The purpose of this study was to evaluate effect of saliva decontamination procedures on microtensile bond strength (MTBS) of 1-step self-etching adhesives to dentin of primary posterior teeth.
63 sound primary-posterior teeth were randomly divided into 3 groups according to different kinds of 1-step selfetching adhesives: Scotchbond™ Universal Adhesive (SBU), All-Bond Universal® (ABU), and Tetric® N Bond Universal (TBU).
Each group was randomly categorized into 7 subgroups: (I) application of adhesive without saliva contamination (control); (II - IV) contamination by saliva before photopolymerization; (V - VII) contamination by saliva after photopolymerization; (II, V) decontamination by drying; (III, VI) decontamination by washing and drying; (IV, VII) decontamination by washing, drying, and reapplication of adhesive. All samples were cut into the blocks. At least 15 blocks were tested for each subgroup.
For SBU and ABU, the MTBS values of subgroups (I, IV, VII) were significantly higher than those of subgroups (II, III, V, VI). For TBU, the MTBS values of subgroups (I, IV) was significantly higher than those of subgroup (II, III, V, VI).
The MTBS of 3 adhesives was reduced by saliva contamination. The adhesive strength on dentin of primary posterior teeth was restored by reapplication of the adhesives after washing and drying.
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KEYWORD
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Saliva, Decontamination, Microtensile bond strength, Self-etching adhesive, Primary dentin
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