TY - JOUR
T1 - Dentin-composite bond strength measurement using the Brazilian disk test
AU - Carrera, Carola A.
AU - Chen, Yung Chung
AU - Li, Yuping
AU - Rudney, Joel
AU - Aparicio, Conrado
AU - Fok, Alex
N1 - Funding Information:
This study was partially supported by the National Institute of Dental and Craniofacial Research (NIDCR), USA through Grant No. 1 R01 DE021366 and the CONICYT Becas Chile Scholarship Program , Chilean Government. The authors of this manuscript declare that no benefits in any form have been received or will be received from a commercial party related directly or indirectly to the subject of this article.
Publisher Copyright:
© 2016 Elsevier Ltd
PY - 2016/9/1
Y1 - 2016/9/1
N2 - Objectives This study presents a variant of the Brazilian disk test (BDT) for assessing the bond strength between composite resins and dentin. Methods Dentin-composite disks (ϕ 5 mm × 2 mm) were prepared using either Z100 or Z250 (3M ESPE) in combination with one of three adhesives, Adper Easy Bond (EB), Adper Scotchbond Multi-Purpose (MP) and Adper Single Bond (SB), and tested under diametral compression. Acoustic emission (AE) and digital image correlation (DIC) were used to monitor debonding of the composite from the dentin ring. A finite element (FE) model was created to calculate the bond strengths using the failure loads. Fracture modes were examined by scanning electron microscopy (SEM). Results Most specimens fractured along the dentin-resin composite interface. DIC and AE confirmed interfacial debonding immediately before fracture of the dentin ring. Results showed that the mean bond strength with EB (14.9 ± 1.9 MPa) was significantly higher than with MP (13.2 ± 2.4 MPa) or SB (12.9 ± 3.0 MPa) (p < 0.05); no significant difference was found between MP and SB (p > 0.05). Z100 (14.5 ± 2.3 MPa) showed higher bond strength than Z250 (12.7 ± 2.5 MPa) (p < 0.05). Majority of specimens (91.3%) showed an adhesive failure mode. EB failed mostly at the dentin-adhesive interface, whereas MP at the composite-adhesive interface; specimens with SB failed at the composite-adhesive interface and cohesively in the adhesive. Conclusions The BDT variant showed to be a suitable alternative for measuring the bond strength between dentin and composite, with zero premature failure, reduced variability in the measurements, and consistent failure at the dentin-composite interface. Clinical significance The new test could help to predict the clinical performance of adhesive systems more effectively and consistently by reducing the coefficient of variation in the measured bond strength.
AB - Objectives This study presents a variant of the Brazilian disk test (BDT) for assessing the bond strength between composite resins and dentin. Methods Dentin-composite disks (ϕ 5 mm × 2 mm) were prepared using either Z100 or Z250 (3M ESPE) in combination with one of three adhesives, Adper Easy Bond (EB), Adper Scotchbond Multi-Purpose (MP) and Adper Single Bond (SB), and tested under diametral compression. Acoustic emission (AE) and digital image correlation (DIC) were used to monitor debonding of the composite from the dentin ring. A finite element (FE) model was created to calculate the bond strengths using the failure loads. Fracture modes were examined by scanning electron microscopy (SEM). Results Most specimens fractured along the dentin-resin composite interface. DIC and AE confirmed interfacial debonding immediately before fracture of the dentin ring. Results showed that the mean bond strength with EB (14.9 ± 1.9 MPa) was significantly higher than with MP (13.2 ± 2.4 MPa) or SB (12.9 ± 3.0 MPa) (p < 0.05); no significant difference was found between MP and SB (p > 0.05). Z100 (14.5 ± 2.3 MPa) showed higher bond strength than Z250 (12.7 ± 2.5 MPa) (p < 0.05). Majority of specimens (91.3%) showed an adhesive failure mode. EB failed mostly at the dentin-adhesive interface, whereas MP at the composite-adhesive interface; specimens with SB failed at the composite-adhesive interface and cohesively in the adhesive. Conclusions The BDT variant showed to be a suitable alternative for measuring the bond strength between dentin and composite, with zero premature failure, reduced variability in the measurements, and consistent failure at the dentin-composite interface. Clinical significance The new test could help to predict the clinical performance of adhesive systems more effectively and consistently by reducing the coefficient of variation in the measured bond strength.
UR - http://www.scopus.com/inward/record.url?scp=84991806330&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84991806330&partnerID=8YFLogxK
U2 - 10.1016/j.jdent.2016.07.002
DO - 10.1016/j.jdent.2016.07.002
M3 - Article
C2 - 27395367
AN - SCOPUS:84991806330
SN - 0300-5712
VL - 52
SP - 37
EP - 44
JO - Journal of Dentistry
JF - Journal of Dentistry
ER -