Dentistry Materials Quiz
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Questions and Answers

Which of the following is a primary use of Theracal?

  • For apexification procedures
  • For direct and indirect pulp capping (correct)
  • As a root canal filling material
  • As a periodontal regeneration material

    • Which of the following statements about Bioaggregate is true?

  • It is primarily used as a root canal filling material.
  • It is delivered as a pre-mixed paste in a syringe.
  • It contains aluminum, which stimulates human PDL fibroblast proliferation.
  • It is an aluminum-free formulation that aids in periodontal regeneration. (correct)

    • Which of the following is a component of Endosequence Root Repair Material (ERRM)?

  • Zirconium oxide (correct)
  • Aluminum oxide
  • Barium sulfate
  • Calcium chloride

    • Which of the following statements about Endosequence Root Repair Material (ERRM) is false?

    <p>It contains aluminum as a radiopacifier.</p> Signup and view all the answers

    Which of the following materials showed higher calcium release and lower solubility when compared to ProRoot MTA and Dycal?

    <p>Theracal</p> Signup and view all the answers

    What is the primary mechanism of hardening reaction when powder and liquid are blended in glass ionomer cements (GICs)?

    <p>Neutralization of the acidic group and significant release of fluorides</p> Signup and view all the answers

    What is the key component in bioactive glass formulations (such as 45S5 and S53P4) that provides bioactivity?

    <p>Bioactive glass</p> Signup and view all the answers

    Which of the following materials has been shown to be effective against Enterococcus faecalis, a common bacteria associated with persistent apical periodontitis?

    <p>A combination of glass ionomer cement and an antimicrobial silver-containing zeolite (ZUT)</p> Signup and view all the answers

    What is the key feature of Smart Dentin Replacement (SDR), a flowable composite material?

    <p>Low polymerization stress and shrinkage, high depth of cure, and ability to be placed in bulk up to 4 mm</p> Signup and view all the answers

    Which of the following materials is used for direct pulp capping, with the goal of promoting pulp healing and preventing the need for root canal treatment?

    <p>Calcium hydroxide</p> Signup and view all the answers

    Which bioceramic endodontic sealer is known for its high pH, hydrophilicity, and active calcium hydroxide release?

    <p>iRoot SP root canal sealer</p> Signup and view all the answers

    What type of nanoparticles are Gutta-Percha cones impregnated and coated with?

    <p>Bioceramic nanoparticles</p> Signup and view all the answers

    Which material is used in cariology, restorative dentistry, and periodontology, and has a pH-related antibacterial effect?

    <p>Bioactive Glass (BAG)</p> Signup and view all the answers

    What makes Bioactive Glass (BAG) a suitable material for pulp capping and periapical bone healing?

    <p>Biocompatibility and antibacterial property</p> Signup and view all the answers

    What characteristic allows Gutta-Percha cones with bioceramic sealers to achieve 'three-dimensional' bonded obturation?

    <p>Laser-verified tip and taper accuracy</p> Signup and view all the answers

    What is the primary advantage of using calcium hydroxide as a pulp-capping material?

    <p>Both A and B</p> Signup and view all the answers

    What is a limitation of long-term use of calcium hydroxide as an intracanal medicament?

    <p>Both A and B</p> Signup and view all the answers

    What is the purpose of developing controlled-release calcium hydroxide loaded microcapsules based on polylactic acid (PLA) and ethyl cellulose (EC)?

    <p>Both A and B</p> Signup and view all the answers

    What is the primary composition of the powder component in MTYA1-Ca, a resin-based direct pulp-capping agent?

    <p>89.0% microfiller, 10.0% calcium hydroxide, and 1.0% benzoyl peroxide</p> Signup and view all the answers

    Which of the following statements about MTYA1-Ca is true?

    <p>It developed dentine bridge formation without the formation of a necrotic layer</p> Signup and view all the answers

    Which of the following is NOT a key advantage of bioactive glass compared to Ca(OH)₂ for direct pulp capping?

    <p>Increased risk of abscess formation</p> Signup and view all the answers

    What is the main mechanism by which casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) aids in remineralization of tooth structure?

    <p>It increases the diffusion of calcium and phosphate ions into the tooth structure</p> Signup and view all the answers

    Which of the following is a key benefit of incorporating Galla chinensis extract into demineralized dentin (dDM) for use as an implant biomaterial?

    <p>Enhanced osteogenic and chemotactic potential</p> Signup and view all the answers

    What is the primary factor that influences the rate of apatite formation when using bioactive glass powders for pulp capping?

    <p>The size of the bioactive glass powder particles</p> Signup and view all the answers

    Which of the following effects is NOT associated with the incorporation of CPP-ACP nanoparticles into the cross-linked matrix of glass ionomer cements (GICs)?

    <p>Reduced risk of internal resorption and pulp necrosis</p> Signup and view all the answers

    What is the main advantage of Cercon over traditional porcelain fused to metal restorations?

    <p>Improved esthetics with no dark margins or artificial grey shadows</p> Signup and view all the answers

    What feature of biomimetic materials allows them to strengthen the root following obturation?

    <p>Ability to chemically bond to tooth structure</p> Signup and view all the answers

    What type of study is still needed to confirm the long-term success of biomimetic materials?

    <p>Randomized, double-blind studies of sufficient duration</p> Signup and view all the answers

    Which of the following is NOT a key feature of biomimetic materials mentioned in the passage?

    <p>Ability to promote tooth remineralization</p> Signup and view all the answers

    What is the main function of mineral trioxide aggregate (MTA) in root canal therapy?

    <p>All of the above</p> Signup and view all the answers

    Which of the following bioactive materials can stimulate reparative mineralization of the coronal pulp and occlusion of the root canal lumen?

    <p>Dentonin (peptide)</p> Signup and view all the answers

    What is the role of Emdogain, a biomaterial containing Porcine proteins, in dental procedures?

    <p>It promotes periodontal regeneration after injury</p> Signup and view all the answers

    Which of the following is an ideal property for a biomaterial used in dental reconstruction?

    <p>All of the above</p> Signup and view all the answers

    What is the purpose of coating dental implants with hydroxyapatite?

    <p>To promote osteogenesis and bone healing</p> Signup and view all the answers

    What is the primary function of Portland cement or MTA in pulp-capping and perforation repair procedures?

    <p>To maintain pulp and periodontal tissue vitality</p> Signup and view all the answers

    Which of the following biomaterials can promote the regeneration of tooth tissue?

    <p>Tissue regenerative gel</p> Signup and view all the answers

    What is the primary use of n-Butyl-2-cyanoacrylate in dentistry?

    <p>As a tissue adhesive</p> Signup and view all the answers

    Which of the following bioactive materials can promote reparative mineralization of the coronal pulp?

    <p>Dentonin (peptide)</p> Signup and view all the answers

    What is the primary function of synthetic bone materials used in craniomaxillofacial reconstruction?

    <p>To fill and repair bone defects</p> Signup and view all the answers

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