TY - JOUR
T1 - Assessment of current adhesives in class I cavity
T2 - Nondestructive imaging using optical coherence tomography and microtensile bond strength
AU - Makishi, Patricia
AU - Thitthaweerat, Suppason
AU - Sadr, Alireza
AU - Shimada, Yasushi
AU - Martins, Adriano Luis
AU - Tagami, Junji
AU - Giannini, Marcelo
N1 - Funding Information:
This study was supported in part by grants from the São Paulo State Research Foundation (FAPESP Nos. 2011/22093-5 and BEPE 2012/18583-0), a Grant-in-Aid for Scientific Research (Nos. 23390432 and 24792019) from the Japan Society for the Promotion of Science , and by a Research Grant for Longevity Sciences (21A-8) from the Ministry of Health , Labor, and Welfare. The diamond burs used in this study were kindly donated for research purposes by the manufacturer KG Sorensen. The authors are also grateful to Dr. Yasunori Sumi, Dr. Baba Bista and Dr. Luiz Fernando Kruszielski for their assistance. The funding bodies had no role in study design; collection, analysis, and interpretation of data; writing of the report; or in the decision to submit the article for publication.
Publisher Copyright:
© 2015 Academy of Dental Materials.
PY - 2015/9/1
Y1 - 2015/9/1
N2 - Abstract Objectives To evaluate the sealing ability and the microtensile bond strength (MTBS) of different adhesive systems bonded to dentin in class I cavities. Methods Round tapered dentin cavities (3-mm diameter, 1.5-mm height) prepared in extracted human molars were restored using composite resin (Clearfil Majesty Posterior) with two-step etch-and-rinse adhesive system (Adper Single Bond 2: ASB2), two-step self-etch adhesive (Clearfil SE Bond: CSEB), all-in-one adhesives (G-Bond Plus: GBP; Tri-S Bond Plus: TSBP), or no adhesive (Control), or bonded using low-shrinkage composite with its proper adhesive (Filtek Silorane, Silorane Adhesive System: FSS). After 24-h water storage or 10,000 cycles of thermal stress, the specimens were immersed into a contrast agent. Two and three-dimensional images were obtained using optical coherence tomography (OCT). The mean percentage of high brightness (HB%) at the interfacial zone in cross-sectional images was calculated as an indicator of contrast agent or gap at the interface. The specimens were then sectioned into beams and the MTBS measured. Results The HB% (ASB2 = TSBP = CSEB < FSS = GBP) and MTBS (CSEB = ASB2, CSEB > TSBP = GBP = FSS, ASB2 > FSS) differed significantly among the adhesives. After aging, HB% increased for GBP and FSS specimens, and the MTBS decreased for FSS specimens (ANOVA, Tukey's post hoc, p < 0.05). The HB% and MTBS were significantly and negatively correlated (p = 0.002). Confocal laser scanning and scanning electron micrographs confirmed contrast agent infiltration within the gap. Significance There was a significant correlation between sealing performance and bond strength of the adhesives in the whole cavity. After aging, the two-step systems showed equal or superior performance to the all-in-one and Silorane systems.
AB - Abstract Objectives To evaluate the sealing ability and the microtensile bond strength (MTBS) of different adhesive systems bonded to dentin in class I cavities. Methods Round tapered dentin cavities (3-mm diameter, 1.5-mm height) prepared in extracted human molars were restored using composite resin (Clearfil Majesty Posterior) with two-step etch-and-rinse adhesive system (Adper Single Bond 2: ASB2), two-step self-etch adhesive (Clearfil SE Bond: CSEB), all-in-one adhesives (G-Bond Plus: GBP; Tri-S Bond Plus: TSBP), or no adhesive (Control), or bonded using low-shrinkage composite with its proper adhesive (Filtek Silorane, Silorane Adhesive System: FSS). After 24-h water storage or 10,000 cycles of thermal stress, the specimens were immersed into a contrast agent. Two and three-dimensional images were obtained using optical coherence tomography (OCT). The mean percentage of high brightness (HB%) at the interfacial zone in cross-sectional images was calculated as an indicator of contrast agent or gap at the interface. The specimens were then sectioned into beams and the MTBS measured. Results The HB% (ASB2 = TSBP = CSEB < FSS = GBP) and MTBS (CSEB = ASB2, CSEB > TSBP = GBP = FSS, ASB2 > FSS) differed significantly among the adhesives. After aging, HB% increased for GBP and FSS specimens, and the MTBS decreased for FSS specimens (ANOVA, Tukey's post hoc, p < 0.05). The HB% and MTBS were significantly and negatively correlated (p = 0.002). Confocal laser scanning and scanning electron micrographs confirmed contrast agent infiltration within the gap. Significance There was a significant correlation between sealing performance and bond strength of the adhesives in the whole cavity. After aging, the two-step systems showed equal or superior performance to the all-in-one and Silorane systems.
KW - Adhesive
KW - Bond strength
KW - Contrast agent
KW - Marginal adaptation
KW - Optical coherence tomography
KW - Silver staining
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U2 - 10.1016/j.dental.2015.06.013
DO - 10.1016/j.dental.2015.06.013
M3 - Article
C2 - 26183294
AN - SCOPUS:84938275858
SN - 0109-5641
VL - 31
SP - e190-e200
JO - Dental Materials
JF - Dental Materials
IS - 9
M1 - 2584
ER -