Influence of Tooth-storage in Chloramine-T Solution on Bovine Dentin TBS.
Objectives: To examine the influence of teeth storage in chloramine-T trihydrate solution on tensile bond strength (TBS) of universal adhesives to bovine dentin in direct and indirect approaches. Methods: Ninety-six bovine teeth were divided into 8 groups (n=12), half of them were immersed in distilled-water and the other half in 1% chloramine-T trihydrate aqueous solution for 1 week. After storage, the teeth were embedded in acrylic resin and ground with #600-SiC paper to expose flat dentin surfaces (ø= 3 mm). Four subgroups were distinguished in each storage condition based on the two restorative approaches, two of them were adhesively cemented using Tokuyama Universal Bond with ESTECEM II (Tokuyama Dental), or Scotchbond Universal with Rely-X Ultimate (3M), according to manufacturers` instructions in self-etch mode. The other two subgroups were applied with Tokuyama Universal Bond in self-etch self-cure mode followed by placement of resin composite, Estelite Sigma Quick (both Tokuyama Dental), or Scotchbond Universal in self-etch mode with light curing (20s) followed by placement of resin composite, Filtek Supreme Ultra (both 3M). After water storage (37oC, 24h), all specimens were subjected to a conventional tensile strength (TBS) test using a universal testing machine (crosshead speed; 1mm/min). The data were statistically analyzed using a two-way ANOVA and Student`s t-test with Bonferroni correction for multiple comparison, significance was set at 0.05. Results: Chloramine-T significantly decreased TBS for the tested groups compared to water (p<0.05), however, for Scotchbond Universal/Rely-X Ultimate, not statistically significant difference was exhibited between water and chloramine-T groups (p=0.097). There were no significant differences among the materials (p>0.05). Conclusions: The storage of bovine teeth in 1% chloramine-T trihydrate solution for 1 week affected the TBS to bovine dentin in direct and indirect approaches using the two universal adhesives.
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:0699 Abstract Category|Abstract Category(s):Dental Materials 4: Adhesion
Authors
Luz Madrigal, Erick
( Tokyo Medical and Dental University
, Tokyo
, Japan
)
Hosaka, Keiichi
( Tokyo Medical and Dental University
, Tokyo
, Japan
)
Nakajima, Masatoshi
( Tokyo Medical & Dental University
, Tokyo
, Japan
)
Ikeda, Masaomi
( Tokyo Medical and Dental University
, Tokyo
, Japan
)
Abdou, Ahmed
( Tokyo Medical and Dental University
, Tokyo
, Japan
)
Tichy, Antonin
( Tokyo Medical and Dental University
, Tokyo
, Japan
)
Tagami, Junji
( Tokyo Medical and Dental University
, Tokyo
, Japan
)