Affect of Salivary Contamination on Shear Bond Strength to Dentin
Objectives:
Despite the remarkable advances in adhesive dentistry, salivary contamination continues to be problematic. Some universal adhesives (UA) available on the market report that salivary contamination is not detrimental to success with adhesively bonded restorations. Salivary contamination can influence the effectiveness of dental adhesives. Previous work has shown the effects of dried artificial saliva on bonding to dentin. Existing salivary contamination models do not standardize the ratio of saliva to adhesive, but the ratio of saliva to adhesive may impact SBS. Objective: The purpose of this study was to evaluate the 24-hour shear bond strength (SBS) of composite resin to dentin contaminated with artificial saliva (AS) containing mucin and amylase. Methods: Methods: Flat bonding surfaces were prepared on extracted human molars (320 grit surface). Using adhesive tape, a 4.5mm bonding window was prepared on the dentin surfaces. Groups (n=12) were prepared using the etch & rinse (ER) or self-etch (SE) modes for Prime & Bond active (PB), Scotchbond Universal Plus (SB) and Adhese Universal (AU) dental adhesives (DA). For the control (C) groups the adhesives were applied per IFU. For the saliva contaminated groups 1.0µl of AS was applied in the bonding window followed by application of 3.0µl of the adhesive. After the adhesive film was air dried and light cured using an Ultradent bonding fixture Spectrum TPH3 was bonded to the prepared surfaces. After water storage for 24 hours at 37°C the specimens were debonded and SBS was calculated (MPa). 2-way ANOVA and LSD post-hoc test was used for determining group differences at p<0.05. Condition and adhesive were significant factors (p≤0.0005). 1-way ANOVA was used to identify differences per adhesive (capital letter) or condition (letter) at p<0.05. Results: Reference table for results Conclusions:
Conclusion: Salivary contamination was a factor in the SBS of composite to dentin placed with Universal adhesives.
Division: Meeting:2024 IADR/AADOCR/CADR General Session (New Orleans, Louisiana) Location: New Orleans, Louisiana
Year: 2024 Final Presentation ID:1957 Abstract Category|Abstract Category(s):Dental Materials 4: Adhesion
Authors
Latta, Mark
( Creighton University
, Omaha
, Nebraska
, United States
)
Seibert, Melissa
( United States Air Force
, Langley Air Force Base
, Virginia
, United States
; Creighton University
, Omaha
, Nebraska
, United States
)
Radniecki, Scott
( Creighton University School of Dentistry
, Omaha
, Nebraska
, United States
)