Cariology Lectures 1-5
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Questions and Answers

What is the primary purpose of filler particles in resin composites?

  • To enhance the aesthetic appearance
  • To initiate the curing process
  • To provide reinforcement and reduce polymerization shrinkage (correct)
  • To serve as coupling agents
  • Optical modifiers in resin composites are primarily used to improve the mechanical strength of the material.

    False

    What are the two main types of materials used in the matrix of resin composites?

    BIS-GMA and UDMA

    The process of improving the curing time of resin composites can involve using initiators such as _____ and accelerators like _____ .

    <p>Benzoyl Peroxide, Organic Amine</p> Signup and view all the answers

    Match the components of resin composites with their functions:

    <p>Matrix (Organic) = Glue for cohesion Filler Particles (Inorganic) = Reinforcement and reduction of shrinkage Coupling Agents (Silanes) = Connection between matrix and filler Optical Modifiers (Inorganic) = Shade matching and aesthetic adjustments</p> Signup and view all the answers

    What is the wavelength range for Valolight Light Cure?

    <p>395-415 nm and 440-480 nm</p> Signup and view all the answers

    Oxygen in the air reduces polymerization efficiency by oxidizing superficial acryloyl groups.

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

    What are the three steps of polymerization?

    <p>Initiation, Propagation, Chain Transfer</p> Signup and view all the answers

    The conversion rate during polymerization ranges from ___ to ___ percent.

    <p>50</p> Signup and view all the answers

    Match the polymerization inhibitors with their uses:

    <p>Eugenol = Temporary fillings/cements Peroxide = Bleaching Oxygen = Inhibiting polymerization Camphorquinone = Photoinitiator activating at 468 nm</p> Signup and view all the answers

    What type of polymerization is described as having three structural types?

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

    Class II cavities include all pit and fissure preps.

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

    As monomers get closer together during polymerization, ___ occurs.

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

    Which class of tooth preparation involves the proximal surfaces of anterior teeth including the incisal edge?

    <p>Class IV</p> Signup and view all the answers

    Abfraction is a defect caused by chemical action.

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

    What is the primary objective of tooth preparation?

    <p>To preserve healthy tooth structure and remove diseased structure.</p> Signup and view all the answers

    The angle at which the eyes are inclined downwards toward work is called the ______.

    <p>declination angle</p> Signup and view all the answers

    Match the following classes of tooth preparation with their definitions:

    <p>Class III = Proximal surfaces of anterior teeth not including incisal edge Class V = Gingival third of facial/lingual surfaces Class IV = Proximal surfaces of anterior teeth including incisal edge Class VI = Incisal and/or occlusal cusp tips</p> Signup and view all the answers

    What is the purpose of primary retention form in tooth preparation?

    <p>To prevent dislodgement of a crown</p> Signup and view all the answers

    The unaided eye can resolve distances as small as 100 um.

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

    What types of lenses are used in prismatic/Kepler loupes?

    <p>Multiple convex lenses.</p> Signup and view all the answers

    The steps for tooth preparation include initial depth, primary resistance form, primary ______ form, and convenience form.

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

    What is the main advantage of using a microscope in dental procedures?

    <p>Less eye convergence strain</p> Signup and view all the answers

    What causes the formation of a white spot in early dental lesions?

    <p>Acid traveling to dentin tubules</p> Signup and view all the answers

    The smear layer obstructs dentin tubules by approximately 50%.

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

    What is the role of the etchant in the dental adhesion process?

    <p>The etchant creates more surface area and decalcifies enamel.</p> Signup and view all the answers

    The __________ is created when a handpiece is used on dentin, producing a layer that obstructs tubules.

    <p>smear layer</p> Signup and view all the answers

    Match the dental materials with their functions:

    <p>Xylitol = Sorbitol alternative used for dental health HEMA = Bifunctional monomer for adhesion Phosphoric Acid = Used for etching enamel Photoinitiators = Initiate curing process in adhesives</p> Signup and view all the answers

    Which of the following statements accurately describe the role of fillers in adhesive bonding?

    <p>They increase the mechanical strength of the adhesive.</p> Signup and view all the answers

    Micromechanical adhesion is weaker than chemical adhesion.

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

    The __________ mechanism of adhesion involves penetrating resin monomers, whereas the __________ mechanism relies on chemical bonding.

    <p>micromechanical; chemical</p> Signup and view all the answers

    What is the primary setting mechanism of Calcium Sulfate (gypsum)?

    <p>Hygroscopic setting</p> Signup and view all the answers

    Enamel is composed of 50% inorganic material.

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

    What do ameloblasts secrete to form enamel rods?

    <p>Hydroxyapatite crystals</p> Signup and view all the answers

    The three stages of tooth development are the Bud, __________, and Bell.

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

    Match the following cement types with their characteristics:

    <p>Glass Ionomer Cements = Seal tubules and pulp Resin Modified Glass Ionomer = Dual-cured, resin-modified Calcium Sulfate = Hygroscopic setting Light-cured Resin = For temping inlays/onlays</p> Signup and view all the answers

    Which of the following is NOT a property of Glass Ionomer Cements?

    <p>Fast setting without water</p> Signup and view all the answers

    Fluoride released from Glass Ionomer Cements remains effective indefinitely.

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

    What components are primarily present in enamel?

    <p>Inorganic materials, organic materials, and water</p> Signup and view all the answers

    During tooth development, the __________ stage involves the enlargement of the bud into a cap shape.

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

    What is the depth of cure for Fuji 2LC resin?

    <p>1.8 mm</p> Signup and view all the answers

    The outer enamel layer is known for having pronounced enamel rods.

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

    What is the mixing time for Fuji 2LC resin?

    <p>10 seconds</p> Signup and view all the answers

    Enamel rods are arranged __________ to the Dentin-Enamel Junction (DEJ).

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

    Which of the following describes the main function of a cavity liner made of glass ionomer?

    <p>Seals tubules and pulp</p> Signup and view all the answers

    What structures extend from the DEJ and provide cushioning due to their hypomineralized and protein-rich nature?

    <p>Enamel Tufts</p> Signup and view all the answers

    What is the condition called that results from genetic defects affecting enamel formation?

    <p>Amelogenesis Imperfecta</p> Signup and view all the answers

    The _____ provides a barrier to protect exposed pulp by forming reparative dentin.

    <p>Dentin Bridge</p> Signup and view all the answers

    Match the types of dentin with their corresponding descriptions:

    <p>Primary = Initial dentin formed after eruption Secondary = Dentin formed throughout the life of the tooth Tertiary = Dentin formed in response to injury or exposure Sclerotic = Dentin formed due to hypermineralization of tubules</p> Signup and view all the answers

    Which disorder is characterized by hypomineralized lesions caused by excessive fluoride?

    <p>Dental Fluorosis</p> Signup and view all the answers

    Enamel has a higher modulus of elasticity than dentin.

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

    What do we call the process that forms dentin in response to pulp exposure?

    <p>Reparative Dentin Formation</p> Signup and view all the answers

    The structural appearance of the DEJ is described as having a _____ appearance.

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

    What type of dentin is characterized by a reaction to stimuli like caries or abrasion?

    <p>Tertiary Dentin</p> Signup and view all the answers

    Study Notes

    Cariology Lectures 1-5

    • Lecture 1: Introduction to Cariology, PPE:
      • PPE protocol, including donning (gown, mask, goggles/loupes, face shield, gloves) and doffing (gloves, face shield, goggles/loupes, mask, gown) procedures.

    Burs and Handpieces

    • Lecture 2: Burs and Handpieces:
      • Bur anatomy (head, neck, shank).
      • Handpiece materials (carbide, diamond, steel, ceramic).
      • Grit size (diamond grit, v-microns, carbide grit, and # of blades).
      • Handpiece primer for various bur widths (1.6 mm-1.5, 2.35mm -1:1).
      • Speed range and corresponding torque (0.7-3.5 Ncm) for respective FG and RA.

    Rubber Dam

    • Lecture 3: Rubber Dam:
      • Explains that rubber dam use is frequently performed in practice.. approximately 50 billion times.

    Tooth Nomenclature

    • Lecture 4: Tooth Nomenclature:
      • Maxillary and mandibular tooth nomenclature, including primary/deciduous (20) and permanent (32) dentition.
      • Tooth numbering systems (Universal, FDI, etc).
      • Succedaneous teeth (permanent teeth that replace deciduous ones).

    Natural Tooth Curvatures

    • Natural Tooth Curvatures:
      • Curve of Spee (anteroposterior curve).
      • Curve of Wilson (mesiolateral curve).
      • Explains these curves as natural aspects of the development of teeth in a mandible/maxilla.

    Tooth Numbering Systems

    • Tooth Numbering Systems:
      • Universal and FDI numbering systems.
      • Explains importance of various numbering systems.

    Resin Composites

    • Resin Composites:
      • Composition of resin composites (Bis-GMA, TEGDMA, UDMA).
      • Filler particles (inorganic reinforcement, ie quartz, lithium aluminum silicate, zirconia, glasses such as barium, strontium).

    Other Materials/Processes

    • Other Materials/Processes:
      • Additional material/process descriptions (reduces polymerization shrinkage, water absorption, and coefficient of thermal expansion, size decrease + percentage of FP in composite over the years increase, coupling agents, optical modifiers.)

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    Cariology 1 - Lectures 1-5 PDF

    Description

    This quiz covers the key concepts from the first five lectures in Cariology. It includes essential topics such as PPE protocols, bur and handpiece knowledge, rubber dam usage, and tooth nomenclature. Test your understanding of these foundational elements in dentistry.

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