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Objective Questions

Latest BTSC Dentist Exam Question (Objective Questions), MCQ in English

Subjects : Dentist

Question Bank BTSC Dentist Exam - English
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Dentist

Question 1Single Answer
Which of the following is a common root canal sealer?
  1. A
    Zinc oxide eugenol
  2. B
    Glass ionomer cement
  3. C
    Composite resin
  4. D
    Amalgam
Question 2Single Answer
What is the primary purpose of root canal irrigants?
  1. A
    To provide thermal insulation
  2. B
    To disinfect and remove debris
  3. C
    To enhance bonding
  4. D
    To provide radiopacity
Question 3Single Answer
Which irrigant is known for its ability to dissolve organic tissue?
  1. A
    Saline
  2. B
    EDTA
  3. C
    Sodium hypochlorite
  4. D
    Chlorhexidine
Question 4Single Answer
What is the most common obturation material used in endodontics?
  1. A
    Composite resin
  2. B
    Amalgam
  3. C
    Gutta-percha
  4. D
    Zinc phosphate cement
Question 5Single Answer
Which advance in endodontic materials improves the sealing ability of root canal obturation?
  1. A
    Traditional gutta percha.
  2. B
    Cold lateral condensation.
  3. C
    Bioceramic sealers
  4. D
    ZOE sealers.
Question 6Single Answer
What is the purpose of using EDTA in root canal irrigation?
  1. A
    To dissolve organic tissue
  2. B
    To remove the smear layer
  3. C
    To provide lubrication
  4. D
    To act as an anesthetic
Question 7Single Answer
Which material is used for apexification in immature teeth?
  1. A
    Gutta-percha
  2. B
    Mineral trioxide aggregate (MTA)
  3. C
    Zinc oxide eugenol
  4. D
    Composite resin
Question 8Single Answer
What is the role of a root canal sealer?
  1. A
    To provide structural support
  2. B
    To fill voids and seal the root canal space
  3. C
    To stimulate bone growth
  4. D
    To provide anesthesia
Question 9Single Answer
Which irrigant is used for its substantivity and antimicrobial properties?
  1. A
    Saline
  2. B
    EDTA
  3. C
    Sodium hypochlorite
  4. D
    Chlorhexidine
Question 10Single Answer
What is the significance of using warm gutta-percha techniques?
  1. A
    Decreased sealing ability
  2. B
    Improved adaptation to canal walls
  3. C
    Increased risk of root fracture
  4. D
    Increased postoperative pain
Question 11Single Answer
What is the primary mechanism of fluoride in caries prevention?
  1. A
    Antibacterial action
  2. B
    Strengthening enamel by forming fluorapatite
  3. C
    Blocking dentinal tubules
  4. D
    Reducing plaque accumulation
Question 12Single Answer
Which material is commonly used as a pit-and-fissure sealant?
  1. A
    Amalgam
  2. B
    Composite resin
  3. C
    Glass ionomer cement
  4. D
    Zinc phosphate cement
Question 13Single Answer
What is the role of pit-and-fissure sealants?
  1. A
    To provide fluoride release
  2. B
    To create a physical barrier against bacteria
  3. C
    To strengthen dentin
  4. D
    To reduce tooth sensitivity
Question 14Single Answer
Which material releases fluoride and is used for high caries risk patients?
  1. A
    Composite resin
  2. B
    Glass ionomer cement
  3. C
    Amalgam
  4. D
    Zinc oxide eugenol
Question 15Single Answer
What is the benefit of fluoride-releasing materials in caries prevention?
  1. A
    They provide a long-term source of fluoride
  2. B
    They enhance bonding
  3. C
    They reduce plaque accumulation
  4. D
    They provide thermal insulation
Question 16Single Answer
What is the purpose of acid etching before sealant application?
  1. A
    To provide fluoride release
  2. B
    To increase surface roughness for bonding
  3. C
    To reduce plaque accumulation
  4. D
    To provide thermal insulation
Question 17Single Answer
Which type of fluoride is commonly used in dental varnishes?
  1. A
    Sodium fluoride
  2. B
    Stannous fluoride
  3. C
    Acidulated phosphate fluoride
  4. D
    Silver diamine fluoride
Question 18Single Answer
What is the primary role of fluoride in remineralization?
  1. A
    To kill bacteria
  2. B
    To enhance the precipitation of calcium and phosphate ions
  3. C
    To block dentinal tubules
  4. D
    To reduce plaque accumulation
Question 19Single Answer
What is the benefit of using glass ionomer sealants?
  1. A
    They provide high strength
  2. B
    They release fluoride and bond chemically to tooth structure
  3. C
    They are highly esthetic
  4. D
    They are easy to polish
Question 20Single Answer
What is the significance of using sealants on newly erupted molars?
  1. A
    To provide fluoride release
  2. B
    To prevent caries in susceptible pits and fissures
  3. C
    To strengthen dentin
  4. D
    To reduce tooth sensitivity
Question 21Single Answer
What is the purpose of using bonding agents in adhesive dentistry?
  1. A
    To provide thermal insulation
  2. B
    To create a strong bond between restorative material and tooth structure
  3. C
    To stimulate bone growth
  4. D
    To provide anesthesia
Question 22Single Answer
Which layer is created by acid etching enamel?
  1. A
    Hybrid layer
  2. B
    Smear layer
  3. C
    Resin tags
  4. D
    Etched enamel surface
Question 23Single Answer
What is the hybrid layer in dentin bonding?
  1. A
    A layer of composite resin
  2. B
    A layer of etched enamel
  3. C
    A layer of resin and dentin collagen
  4. D
    A layer of smear layer debris
Question 24Single Answer
Which component of bonding agents provides chemical bonding to dentin collagen?
  1. A
    Resin monomers
  2. B
    Solvents
  3. C
    Primers
  4. D
    Acid etchants
Question 25Single Answer
What is the mechanism of adhesion to enamel?
  1. A
    Chemical bonding
  2. B
    Micromechanical retention
  3. C
    Macromechanical retention
  4. D
    Ionic bonding
Question 26Single Answer
What is the mechanism of adhesion to dentin?
  1. A
    Chemical bonding
  2. B
    Micromechanical retention and hybrid layer formation
  3. C
    Macromechanical retention
  4. D
    Ionic bonding
Question 27Single Answer
Which generation of bonding agents involves a three-step technique (etch, prime, bond)?
  1. A
    Fourth generation
  2. B
    Fifth generation
  3. C
    Sixth generation
  4. D
    Seventh generation
Question 28Single Answer
Which generation of bonding agents involves a simplified two-step technique (self-etch, bond)?
  1. A
    Fifth generation
  2. B
    Sixth generation
  3. C
    Seventh generation
  4. D
    Eighth generation
Question 29Single Answer
Which component of bonding agents enhances wetting and penetration into dentin?
  1. A
    Resin monomers
  2. B
    Solvents
  3. C
    Primers
  4. D
    Acid etchants
Question 30Single Answer
What is the significance of the smear layer in dentin bonding?
  1. A
    It enhances bonding.
  2. B
    It inhibits bonding.
  3. C
    It provides fluoride release.
  4. D
    It reduces plaque accumulation.
Question 31Single Answer
What is the purpose of using a dentin conditioner (mild acid) in self-etch systems?
  1. A
    To remove the smear layer and demineralize dentin
  2. B
    To provide fluoride release
  3. C
    To reduce plaque accumulation
  4. D
    To provide thermal insulation
Question 32Single Answer
What is the primary component of resin monomers in bonding agents?
  1. A
    Water
  2. B
    Methacrylate
  3. C
    Calcium hydroxide
  4. D
    Zinc oxide
Question 33Single Answer
What is the purpose of light curing in resin bonding systems?
  1. A
    To provide fluoride release
  2. B
    To polymerize the resin and harden the bonding agent
  3. C
    To reduce plaque accumulation
  4. D
    To provide thermal insulation
Question 34Single Answer
What is the advantage of using universal bonding agents?
  1. A
    They provide high strength only
  2. B
    They are compatible with various restorative materials and techniques
  3. C
    They are highly esthetic only
  4. D
    They are difficult to polish
Question 35Single Answer
What is the significance of using a silane coupling agent in ceramic restorations?
  1. A
    It enhances bonding to composite resin
  2. B
    It improves bonding to silica-based ceramics
  3. C
    It provides fluoride release
  4. D
    It reduces plaque accumulation
Question 36Single Answer
What is nanotechnology in dental materials?
  1. A
    The use of large particles in dental restorations
  2. B
    The use of materials at the nanoscale level
  3. C
    The use of traditional materials only
  4. D
    The use of materials without any enhancement
Question 37Single Answer
What is a benefit of using nanoparticles in dental composites?
  1. A
    Reduced strength
  2. B
    Improved esthetics and polishability
  3. C
    Increased plaque accumulation
  4. D
    Reduced biocompatibility
Question 38Single Answer
What is a smart material in dentistry?
  1. A
    A material that changes color only
  2. B
    A material that responds to environmental changes
  3. C
    A material that is difficult to use
  4. D
    A material that is only used for esthetics
Question 39Single Answer
Which smart material is used for drug delivery in periodontal therapy?
  1. A
    Amalgam
  2. B
    Composite resin
  3. C
    Nanoparticles loaded with antibiotics
  4. D
    Zinc phosphate cement
Question 40Single Answer
What is the purpose of using bioactive materials in dental restorations?
  1. A
    To provide thermal insulation only
  2. B
    To stimulate tissue regeneration and release therapeutic ions
  3. C
    To reduce plaque accumulation only
  4. D
    To enhance esthetics only
Question 41Single Answer
What is the benefit of using nano-filled glass ionomer cements?
  1. A
    Reduced fluoride release
  2. B
    Improved strength and esthetics
  3. C
    Increased plaque accumulation
  4. D
    Reduced biocompatibility
Question 42Single Answer
What is the role of self-healing materials in dental restorations?
  1. A
    To provide thermal insulation only
  2. B
    To repair microcracks and extend the lifespan of restorations
  3. C
    To reduce plaque accumulation only
  4. D
    To enhance esthetics only
Question 43Single Answer
Which material is used for bone regeneration in implant dentistry?
  1. A
    Amalgam
  2. B
    Composite resin
  3. C
    Nanohydroxyapatite
  4. D
    Zinc phosphate cement
Question 44Single Answer
What is the benefit of using antimicrobial nanoparticles in dental materials?
  1. A
    Reduced biocompatibility
  2. B
    Prevention of bacterial colonization and biofilm formation
  3. C
    Increased plaque accumulation
  4. D
    Reduced esthetics
Question 45Single Answer
What is the significance of using CAD/CAM technology in dental material fabrication?
  1. A
    Reduced accuracy
  2. B
    Improved precision and efficiency
  3. C
    Increased plaque accumulation
  4. D
    Reduced biocompatibility
Question 46Single Answer
What is the role of using piezoelectric materials in dental devices?
  1. A
    To provide thermal insulation only
  2. B
    To convert mechanical stress into electrical energy
  3. C
    To reduce plaque accumulation only
  4. D
    To enhance esthetics only
Question 47Single Answer
What is the benefit of using 3D-printed dental materials?
  1. A
    Reduced accuracy
  2. B
    Customized fabrication and reduced waste
  3. C
    Increased plaque accumulation
  4. D
    Reduced biocompatibility
Question 48Single Answer
What is the purpose of using shape memory alloys in orthodontics?
  1. A
    To provide thermal insulation only
  2. B
    To provide constant and gentle forces for tooth movement
  3. C
    To reduce plaque accumulation only
  4. D
    To enhance esthetics only
Question 49Single Answer
What is the significance of using bioceramics in dental implants?
  1. A
    Reduced biocompatibility
  2. B
    Improved osseointegration and tissue response
  3. C
    Increased plaque accumulation
  4. D
    Reduced esthetics
Question 50Single Answer
What is the role of using tissue engineering in dental materials?
  1. A
    To provide thermal insulation only
  2. B
    To regenerate damaged dental tissues
  3. C
    To reduce plaque accumulation only
  4. D
    To enhance esthetics only
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