IADR Abstract Archives

Assessment of Dentin-resin Cement Interface after Acid-base Challenge

Objectives: The purpose of this study was to evaluate dentin bond strength and to observe the adhesive-dentin interface after acid-base challenge using three different adhesive resin cements.
Methods: CAD/CAM resin blocks (Estelite Block, Tokuyama Dental) were cut into slices of approximately 2 mm thickness. Thirty dentin surfaces from caries-free human premolars were ground and bonded to CRB with using one of three dual-cure resin cements: PANAVIA V5 (V5, Kuraray Noritake Dental), ESTECEM II (E II, Tokuyama Dental) or Rely X Ultimate (RXU, 3M ESPE) according to the manufacturer’s instruction. A microtensile bond strength (μ TBS) test was undertaken with 0, 5000 and 10,000 thermal cycles, and the interface of the bonded specimens after acid-base challenge was examined by SEM. μ TBS were statistically analyzed using 2-way ANOVA and t-test with Bonferroni correction at α=0.05.
Results: The μTBS of V5 exhibited a stable bond strength despite thermal cycling while the bond of EII and RXU after 10,000 cycles dropped significantly among all thermal cycle periods (p <0.05). An acid-base resistant zone (ABRZ) was observed in all groups, however, the morphology of the bonded interface differed among the tested cements.
Conclusions: V5 provided most reliable bonding performance to dentin of human premolars and presented durability against acid-base challenge.

Division: IADR/AADR/CADR General Session
Meeting: 2019 IADR/AADR/CADR General Session (Vancouver, BC, Canada)
Location: Vancouver, BC, Canada
Year: 2019
Final Presentation ID: 0691
Abstract Category|Abstract Category(s): Dental Materials 4: Adhesion

Authors

Aung, San San May Phyo ( Tokyo Medical and Dental University , Tokyo , Bunkyo-ku , Japan )

Takagaki, Tomohiro ( Tokyo Medical and Dental University , Tokyo , Bunkyo-ku , Japan )

Ko Ko, Aye ( Tokyo Medical and Dental University , Tokyo , Bunkyo-ku , Japan )

Halabi, Somayah ( Al-Hada Armed Forces Hospital , Al-Hada , Taif , Saudi Arabia )

Sato, Takaaki ( Tokyo Medical and Dental University , Tokyo , Bunkyo-ku , Japan )

Ikeda, Masaomi ( Tokyo Medical and Dental University , Tokyo , Bunkyo-ku , Japan )

Nikaido, Toru ( Tokyo Medical and Dental University , Tokyo , Bunkyo-ku , Japan ; Asahi University , Gifu , Mizuhio , Japan )

Tagami, Junji ( Tokyo Medical and Dental University , Tokyo , Bunkyo-ku , Japan )

Financial Interest Disclosure: NONE

SESSION INFORMATION

Poster Session
Adhesion
Thursday, 06/20/2019 , 11:00AM - 12:15PM

TABLES

Mean values and standard deviations of microtensile bond strength values of all groups

	V5	E II	RXU
0 TC	55.1 ± 6.1(10/70/20/0)	61.9 ± 6.3 A, B (10/80/10/0)	49.9 ± 5.5 D, E (20/70/10/0)
5000 TC	55.5 ± 5.1(0/90/10/0)	53.5 ± 5.2 A, C (0/80/20/0)	37.6 ± 6.0 D, F (30/30/40/0)
10000 TC	52.6 ± 4.8(10/60/20/10)	44.7 ± 5.7 B, C (30/20/50/0)	28.8 ± 4.7 E, F (50/30/20/0)

n=10 Data are shown as mean ± standard deviation. Same large superscript letters indicate statistically significant difference between bond strength (p <0.05). Percentage of failure mode (Adhesive failure at the resin-dentin interface/ Cohesive failure completely within the resin cement/ Partial adhesive failure, where remnants of resin remained on the dentin surface/ Cohesive failure in the dentin)