TY - JOUR
T1 - Sealing performance of resin cements before and after thermal cycling
T2 - Evaluation by optical coherence tomography
AU - Turkistani, Alaa
AU - Sadr, Alireza
AU - Shimada, Yasushi
AU - Nikaido, Toru
AU - Sumi, Yasunori
AU - Tagami, Junji
N1 - Funding Information:
This research was supported in part by the Global Center of Excellence Program, International Research Center for Molecular Science in Tooth and Bone Diseases at Tokyo Medical and Dental University , partly by grants-in-aid for scientific research no. 24792019 from the Japan Society for the Promotion of Science and partly by King Abdulaziz University .
PY - 2014/9
Y1 - 2014/9
N2 - Objectives Self-adhesive resin cements have been recently introduced; however, there is little data available on their long-term performance. In this in vitro study, swept-source optical coherence tomography (OCT) at 1310 nm center wavelength was used for monitoring adaptation of indirect resin restorations after thermal cycling. Methods Resin inlays were luted to class-I cavities of extracted human teeth using three resin cements; Clearfil SA Luting (SA; Kuraray), Bistite II DC or Multibond II (Tokuyama Dental). Each cement was applied with or without pre-coating of dentin by a self-etch adhesive (Clearfil SE Bond) and a low-viscosity microfilled resin. OCT imaging was performed after 24 h, after 2000 and after 10,000 thermocycles (n = 5). Selected samples were sectioned for interfacial observation by confocal laser scanning microscope (CLSM). Floor adaptation (percentage) was analyzed by software on 20 B-scans throughout each specimen, and subjected to statistical analysis by three-way ANOVA test at a significance level of 0.05. Results Resin cement type, resin coating and thermal aging all significantly affected adaptation (p < 0.05). Initially, SA showed the highest adaptation; however, thermal aging significantly affected its sealing. The best results for all the cements were consistently achieved when the resin coating technique was applied where no deterioration of interfacial integrity was observed in the coated groups. CLSM closely confirmed OCT findings in all groups. Significance OCT could be used for monitoring of composite inlays with several interfacial resin layers. The application of a direct bonding agent in the resin-coating technique improved interfacial sealing and durability of all resin cements.
AB - Objectives Self-adhesive resin cements have been recently introduced; however, there is little data available on their long-term performance. In this in vitro study, swept-source optical coherence tomography (OCT) at 1310 nm center wavelength was used for monitoring adaptation of indirect resin restorations after thermal cycling. Methods Resin inlays were luted to class-I cavities of extracted human teeth using three resin cements; Clearfil SA Luting (SA; Kuraray), Bistite II DC or Multibond II (Tokuyama Dental). Each cement was applied with or without pre-coating of dentin by a self-etch adhesive (Clearfil SE Bond) and a low-viscosity microfilled resin. OCT imaging was performed after 24 h, after 2000 and after 10,000 thermocycles (n = 5). Selected samples were sectioned for interfacial observation by confocal laser scanning microscope (CLSM). Floor adaptation (percentage) was analyzed by software on 20 B-scans throughout each specimen, and subjected to statistical analysis by three-way ANOVA test at a significance level of 0.05. Results Resin cement type, resin coating and thermal aging all significantly affected adaptation (p < 0.05). Initially, SA showed the highest adaptation; however, thermal aging significantly affected its sealing. The best results for all the cements were consistently achieved when the resin coating technique was applied where no deterioration of interfacial integrity was observed in the coated groups. CLSM closely confirmed OCT findings in all groups. Significance OCT could be used for monitoring of composite inlays with several interfacial resin layers. The application of a direct bonding agent in the resin-coating technique improved interfacial sealing and durability of all resin cements.
KW - Adaptation
KW - Optical coherence tomography
KW - Resin cement
KW - Resin coating
KW - Resin inlay
UR - http://www.scopus.com/inward/record.url?scp=84906322008&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84906322008&partnerID=8YFLogxK
U2 - 10.1016/j.dental.2014.05.010
DO - 10.1016/j.dental.2014.05.010
M3 - Article
C2 - 24946983
AN - SCOPUS:84906322008
VL - 30
SP - 993
EP - 1004
JO - Dental Materials
JF - Dental Materials
SN - 0109-5641
IS - 9
ER -