Dental Prosthetics Design Quiz
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Questions and Answers

What is the primary function of a major connector?

  • To join the components of the denture on one side to the opposite side (correct)
  • To prevent impingement of the free gingival margin
  • To provide retention for the denture
  • To distribute occlusal forces evenly across the supporting structures
  • Which of the following is NOT a structural requirement for a major connector?

  • Termination away from the gingival tissues
  • Avoidance of impingement on the free gingival margin
  • Flexibility (correct)
  • Rigidity
  • Why is rigidity an important requirement for a major connector?

  • To prevent stress concentration on individual teeth or supporting structures (correct)
  • To reduce the overall weight of the denture
  • To provide indirect retention for the denture
  • To allow for easier removal and insertion of the denture
  • What is the consequence of a flexible major connector?

    <p>Stress concentration on individual teeth or supporting structures</p> Signup and view all the answers

    Why should the border of a major connector never terminate on the gingival tissues?

    <p>To avoid injury or irritation to the highly vascular gingival margin</p> Signup and view all the answers

    Which of the following is NOT a function of a major connector?

    <p>Providing direct retention for the denture</p> Signup and view all the answers

    What is one of the advantages of a lingual bar?

    <p>It prevents decalcification of tooth surfaces</p> Signup and view all the answers

    What is the primary purpose of providing relief for mandibular major connectors?

    <p>To prevent the connectors from lacerating the lingual mucosa</p> Signup and view all the answers

    Which of the following is a contraindication for a lingual bar?

    <p>Bilateral tori mandibularis</p> Signup and view all the answers

    What is a potential disadvantage of a lingual bar?

    <p>It can become flexible if poorly constructed</p> Signup and view all the answers

    What factor determines the amount of relief required for mandibular major connectors?

    <p>The type of partial denture design</p> Signup and view all the answers

    Which anatomical feature of the lingual side of the alveolar ridge requires maximum relief for mandibular major connectors?

    <p>A tissue surface sloping towards the tongue</p> Signup and view all the answers

    Which modification can be made to a lingual bar?

    <p>Splinting periodontally affected teeth</p> Signup and view all the answers

    What is the purpose of avoiding sharp angles or corners in the design of mandibular major connectors?

    <p>To reduce stress concentration</p> Signup and view all the answers

    What is a potential issue with a lingual bar modification?

    <p>It may cause discomfort to the tongue</p> Signup and view all the answers

    What is a potential issue with an unmodified lingual bar?

    <p>It may cause food entrapment and discomfort</p> Signup and view all the answers

    What design feature is required for maxillary major connectors according to the text?

    <p>They should be symmetric on both sides and cross the palate in a straight line</p> Signup and view all the answers

    How should the presence of an undercut on the lingual side of the alveolar ridge be addressed in the laboratory?

    <p>Block out the undercut</p> Signup and view all the answers

    What is the swing-lock labial bar used for in partial dentures?

    <p>Engaging tooth undercuts for retention</p> Signup and view all the answers

    Why is a step-back design used in cases of diastema between anterior teeth?

    <p>To prevent metal display</p> Signup and view all the answers

    What is a major concern associated with the lingual major connector in partial dentures?

    <p>Lack of normal physiologic stimulation of the gingiva</p> Signup and view all the answers

    Why is metal considered difficult in terms of adjustments and acceptance in partial dentures?

    <p>It may cause gingival &amp; periodontal diseases</p> Signup and view all the answers

    In what situation can a swing-lock labial bar be particularly useful in partial dentures?

    <p>Severe bone resorption and few remaining natural teeth</p> Signup and view all the answers

    What function does the double lingual bar serve in partial dentures?

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

    What is the primary function of the closed horseshoe or antroposterior palatal strap?

    <p>To distribute occlusal load</p> Signup and view all the answers

    What is a potential issue with an anterior thickened strap in a closed horseshoe or antroposterior palatal strap design?

    <p>It may interfere with phonetics</p> Signup and view all the answers

    What is the recommended minimum width for the posterior strap component in a closed horseshoe or antroposterior palatal strap design?

    <p>8 mm</p> Signup and view all the answers

    Which type of palatal bar is typically used when a large number of teeth are missing, and a torus is present?

    <p>Single palatal bar</p> Signup and view all the answers

    Which type of palatal bar is recommended for interim partial dentures or when replacing one or two teeth on each side?

    <p>Single palatal bar</p> Signup and view all the answers

    What is the recommended cross-sectional shape for the posterior bar component in an antroposterior or double palatal bar design?

    <p>Half-oval</p> Signup and view all the answers

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