Influence of tooth age and application time on the microtensile bond strengths of different adhesive systems to dentin Public Deposited

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Last Modified
  • March 21, 2019
Creator
  • Oliveira, Greice Costa Borges
    • Affiliation: School of Dentistry, Department of Operative Dentistry
Abstract
  • This study evaluated the effect of tooth age and application time on the microtensile bond strengths (μTBS) of different adhesives to dentin. One-hundred twenty intact human teeth were mechanically ground to expose mid-coronal dentin and randomized to three groups (n=40) according to subject’s age in years: 15-25, 35-45, and ≥55. Within each group, specimens were further randomized to 8 experimental subgroups according to adhesive (etch-and-rinse 3- and 2-step; selfetch 2- and 1-step) and application time (instructions vs. extended). Composite resin was applied to the treated surfaces and after storage for 24 hours all specimens were processed for μTBS testing. Data were analyzed by factorial ANOVA and post-hoc tests (p=0.05). μTBS values ranged from 10.9 MPa (2-step self-etch, extended application time, age group 15-25) to 50.7 MPa (1-step self-etch, extended application time, age group ≥55). Tooth age and application time had no significant effect on μTBS of the adhesives tested.
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  • In Copyright
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  • "... in partial fulfillment of the requirements for the degree of Master of Science in the Department of Operative Dentistry."
Advisor
  • Ritter, Andre
Degree granting institution
  • University of North Carolina at Chapel Hill
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Place of publication
  • Chapel Hill, NC
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  • Open access
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