Dentine Structure and Function
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Questions and Answers

Who is credited with defining the term 'dentine' in the 1840s?

  • Charles Darwin
  • Galileo Galilei
  • Sir Richard Owen (correct)
  • Sir Isaac Newton
  • What was the previous term used to describe the tissue that forms the bulk of the teeth?

  • Tooth bone
  • Os dentale
  • Dental tissue
  • All of the above (correct)
  • What is the main component of the tooth that dentine forms?

  • The root
  • The enamel
  • The pulp
  • The chief part or body of the tooth (correct)
  • What is the name of the book where Sir Richard Owen proposed the term 'dentine'?

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

    What is another notable achievement of Sir Richard Owen?

    <p>He founded the Natural History Museum in South Kensington</p> Signup and view all the answers

    What is the term that Sir Richard Owen is also credited with inventing?

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

    What is the percentage of inorganic material in mature dentine?

    <p>70%</p> Signup and view all the answers

    What is the effect of etching on enamel and dentine during treatments?

    <p>Etching leaves behind a roughened surface for bonding on enamel, but a soft collagen layer on dentine</p> Signup and view all the answers

    What is the primary function of dentine and pulp in each tooth?

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

    What is the characteristic feature of dentine?

    <p>Dentinal tubules</p> Signup and view all the answers

    What is the difference in radiopacity between dentine and bone in radiographs?

    <p>Dentine is more radiopaque than bone</p> Signup and view all the answers

    What type of collagen is the main component of organic material in mature dentine?

    <p>Type 1 collagen</p> Signup and view all the answers

    What is the characteristic of root dentine?

    <p>Has a mantle dentine</p> Signup and view all the answers

    What is the purpose of the hyaline layer?

    <p>To bond dentine to cementum</p> Signup and view all the answers

    What is the characteristic of the granular layer of Tomes?

    <p>It is hypomineralized</p> Signup and view all the answers

    What is the result of neighbouring calcospherites failing to merge?

    <p>Formation of globular dentine</p> Signup and view all the answers

    What is the thickness of the hyaline layer?

    <p>Around 10 microns thick</p> Signup and view all the answers

    What is the appearance of the hyaline layer in thin section?

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

    What is the most characteristic feature of dentine?

    <p>Dentinal tubules</p> Signup and view all the answers

    What is found in the dentinal tubules?

    <p>Odontoblast processes, peritubular fluid, nerve filaments, and more dentine</p> Signup and view all the answers

    What is unique about dentine compared to enamel?

    <p>It is a living tissue, even after tooth eruption</p> Signup and view all the answers

    What happens to the odontoblasts as they produce dentine?

    <p>They migrate away from the dentine secretory front</p> Signup and view all the answers

    What is one type of dentine curvature?

    <p>Primary (S-bends)</p> Signup and view all the answers

    What is one type of dentine based on its properties?

    <p>Intertubular dentine</p> Signup and view all the answers

    What is the main difference between primary and secondary dentine?

    <p>Rate of development</p> Signup and view all the answers

    What triggers the deposition of reactionary dentine?

    <p>External stimuli such as caries or trauma</p> Signup and view all the answers

    What is the characteristic of reparative dentine?

    <p>Irregular and tubule-poor</p> Signup and view all the answers

    What is the result of sclerotic/translucent dentine formation?

    <p>Decreased permeability of dentine</p> Signup and view all the answers

    What is the appearance of sclerotic/translucent dentine?

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

    When does sclerotic/translucent dentine typically occur?

    <p>Naturally with age</p> Signup and view all the answers

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