Posterior Palatal Seal in Dentures
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Questions and Answers

What is the purpose of a good posterior seal in a denture?

  • Improving speech clarity
  • Preventing accumulation of food between denture and palate (correct)
  • Reducing the gag reflex
  • Enhancing taste sensation

    • Which forces can a properly placed posterior palatal seal help resist?

  • Horizontal forces (correct)
  • Diagonal forces
  • Translational forces
  • Rotational forces

    • Where does the posterior palatal seal lie in relation to the vibrating lines?

  • Below the vibrating lines (correct)
  • Above the vibrating lines
  • On top of the vibrating lines
  • Adjacent to the vibrating lines

    • What is located at the junction of attached tissue overlying the hard palate and the movable tissue of the soft palate?

    <p>Anterior vibrating line</p> Signup and view all the answers

    Which of the following is NOT a function of a properly placed posterior palatal seal?

    <p>Impinging tissues of hard palate</p> Signup and view all the answers

    What makes up for shrinkage of acrylic that occurs during processing of a denture?

    <p>Properly placed posterior palatal seal</p> Signup and view all the answers

    Where does a good border seal help resist forces acting upon a denture?

    <p>Horizontal and translational forces</p> Signup and view all the answers

    What lies between the movable and immovable tissues of the soft palate?

    <p>Posterior palatal seal</p> Signup and view all the answers

    Which structure takes the shape of a cupid’s bow due to the projection of the posterior nasal spine?

    <p>Anterior vibrating line</p> Signup and view all the answers

    What is the recommended depth of the line scribed for the posterior palatal seal?

    <p>1/2 depth of #8 round bur</p> Signup and view all the answers

    How should the edges of the scribed line for the posterior palatal seal be treated?

    <p>Blended and rounded off</p> Signup and view all the answers

    Where should the arbitrary posterior palatal seal be scribed from?

    <p>Midline to hamular notch area</p> Signup and view all the answers

    What should be used to adjust the baseplate to coincide with the posterior edge of the posterior palatal seal?

    <p>Acrylic bur</p> Signup and view all the answers

    How should the baseplate be modified if it is already fabricated and needs adjustment at the posterior border?

    <p>Adjust with an acrylic bur</p> Signup and view all the answers

    Where should the mid portion of the posterior palatal seal be in relation to the posterior border?

    <p>Slightly forward from the edge</p> Signup and view all the answers

    What tool can be used to blend and round off the edges of the scribed line?

    <p>#7 wax spatula</p> Signup and view all the answers

    How far anterior to the posterior limit should the anterior portion of the posterior palatal seal be?

    <p>~3-4 mm</p> Signup and view all the answers

    What is used to scribe the line for the Posterior Palatal Seal?

    <p>#8 Round Bur on straight handpiece</p> Signup and view all the answers

    What should not happen with the baseplate at the posterior border during adjustment?

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

    Where is the posterior vibrating line located?

    <p>At the demarcation between the tensor veli palatini muscle and soft palate</p> Signup and view all the answers

    How is the posterior vibrating line visualized?

    <p>By asking the patient to say 'ah' normally, unexaggerated way in short bursts</p> Signup and view all the answers

    What does the posterior vibrating line demarcate?

    <p>The area with limited movement during function from the area markedly displaced during function</p> Signup and view all the answers

    When is the Arbitrary Posterior Palatal Seal placed?

    <p>After trimming and drying the master cast</p> Signup and view all the answers

    What anatomical structures determine the posterior length/edge of a denture?

    <p>Hamular notch and vibrating line</p> Signup and view all the answers

    How can you locate the Arbitrary Posterior Palatal Seal?

    <p>By drawing a line extending from fovea palatini to the hamular notch</p> Signup and view all the answers

    What is the purpose of placing the Arbitrary Posterior Palatal Seal?

    <p>To create a post dam area</p> Signup and view all the answers

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