Esthetic & Direct Composite Dentistry: A Student's Guide
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17 cards
Question: What is the first step of bonding to enamel and what visual change does it produce?
Answer: Conditioning the enamel with phosphoric acid; it produces a frosty-looking surface.
Question: How does enamel conditioning improve bonding?
Answer: It increases surface energy and surface area by creating microretentive zones.
Question: What factors determine the amount of inorganic material removed during acid etching of enamel?
Answer: Acid concentration, duration of etching, and the chemical composition of the etchant.
Question: What are the effects of acid etchants on dentin?
Answer: They demineralize dentin exposing connective tissue, open collagen fibers in dentinal tubules to expose micropores for resin infiltration, and remove
Question: Why is removal of the smear layer important for bonding to dentin?
Answer: It allows bonding agent access to tubules so it can flow in, creating greater micromechanical interlock and increased resistance to microleakage.
Question: List the generations of adhesive systems mentioned and one distinguishing feature of the three-component systems.
Answer: First through seventh generations are mentioned. Three-component systems require separate application of a primer and an adhesive following etching.
Question: What is the distinguishing feature of fifth-generation adhesive systems?
Answer: The primer and adhesive are combined into a single component.
Question: How do sixth- and seventh-generation adhesive systems differ?
Answer: Sixth-generation systems use a self-etching primer and an adhesive; seventh-generation systems are described as all-in-one systems.
Question: Name the main types of materials available for direct dental restorative use.
Answer: Resin composites, glass-ionomers, and hybrid materials that combine substances from both.
Question: Which restorative material is described as occupying a paramount position among direct restorative materials?
Answer: Composite resins.