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

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

<p>Dinosaur (A)</p> Signup and view all the answers

What is the percentage of inorganic material in mature dentine?

<p>70% (A)</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 (C)</p> Signup and view all the answers

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

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

What is the characteristic feature of dentine?

<p>Dentinal tubules (C)</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 (A)</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 (D)</p> Signup and view all the answers

What is the characteristic of root dentine?

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

What is the purpose of the hyaline layer?

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

What is the characteristic of the granular layer of Tomes?

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

What is the result of neighbouring calcospherites failing to merge?

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

What is the thickness of the hyaline layer?

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

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

<p>Clear (B)</p> Signup and view all the answers

What is the most characteristic feature of dentine?

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

What is found in the dentinal tubules?

<p>Odontoblast processes, peritubular fluid, nerve filaments, and more dentine (C)</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 (B)</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 (D)</p> Signup and view all the answers

What is one type of dentine curvature?

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

What is one type of dentine based on its properties?

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

What is the main difference between primary and secondary dentine?

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

What triggers the deposition of reactionary dentine?

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

What is the characteristic of reparative dentine?

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

What is the result of sclerotic/translucent dentine formation?

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

What is the appearance of sclerotic/translucent dentine?

<p>Glassy (B)</p> Signup and view all the answers

When does sclerotic/translucent dentine typically occur?

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

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