Evaluation of Film Thickness and Microleakage in Fifth-Generation Adhesives
Objectives: This study aims to determine if there is a difference in film thickness between two different fifth-generation total etch adhesives and if that difference correlates with the amount of microleakage in restorations using those adhesives. A sixth generation self etch adhesive was used as the control. Methods: Thirty-nine class II slot preparations (3x3x3mm) were performed on non-carious human molars and randomly assigned into 3 groups (n=13): Group A-Peak® LC Bond (Ultradent), Group B-Excite® F (Ivoclar Vivadent), and Group C (Control)-ClearfilTM SE Bond (Kuraray). All adhesives were applied according to manufacturer’s instructions and the preparations were filled with FiltekTM Supreme Ultra (3M) composite. The completed restorations were thermocycled for 1000 cycles between 5°C and 55°C with a dwell time of 30 seconds. Samples were immersed in 2% methylene blue dye for 24 hours and then embedded in acrylic resin and sectioned mesio-distally. The film thickness of each bonding agent was evaluated under a stereomicroscope (Olympus, SZX16®) with Buehler OmniMet 9.0 software, A dye-penetration to axial wall scale was used on the gingival floor: 0=No dye penetration, 1=Penetration less than one-third of the gingival width, 2=Penetration beyond one-third of the gingival, 3=Penetration along the axial wall. Statistical analyses were performed using SAS program. The median of the microleakage and thickness were compared using Kruskal–Wallis tests. Further analyses were conducted to evaluate the differences between each pair of groups using Mann–Whitney U tests with Bonferroni correction. Results: The median film thickness was significantly lower in the Group A than in Groups B and C (p<0.0001, Table 1). However, there were no statistically significant differences in microleakage between the three groups (p=0.1290, Table 2). Conclusions: There was a difference in film thickness between the fifth-generation dental adhesives, however the film thickness did not correlate to microleakage.
AADR/CADR Annual Meeting
2016 AADR/CADR Annual Meeting (Los Angeles, California) Los Angeles, California
2016 1650 Dental Materials 4: Adhesion
Li, Diana
( Tufts University School of Dental Medcine
, Boston
, Massachusetts
, United States
)
Brown, Carrie
( Tufts University School of Dental Medcine
, Boston
, Massachusetts
, United States
)
Natto, Zuhair
( Tufts University School of Dental Medcine
, Boston
, Massachusetts
, United States
)
Eisen, Steven
( Tufts University School of Dental Medcine
, Boston
, Massachusetts
, United States
)
NONE
Poster Session
Bonding Performance of Adhesive Systems
Saturday,
03/19/2016
, 10:45AM - 12:00PM