30 Questions
What is the primary function of a major connector?
To join the components on one side of the arch to the opposite side
Which of the following is NOT a structural requirement for a major connector?
Flexibility to prevent stress concentration
What is the consequence of a flexible major connector?
Concentration of stresses on individual teeth or edentulous ridges
Why should the border of a major connector avoid the gingival margin?
Because the gingival margin is highly vascular and easily injured
Which of the following is NOT a function of a major connector?
Providing direct retention for the partial denture
Which statement about the termination of a major connector is correct?
The border should never terminate on gingival tissues
What is an advantage of using a lingual bar in dental prosthetics?
Allows natural gingival stimulation
What is a common contraindication for using a lingual bar in dental prosthetics?
Bilateral torus mandibularis
What is a disadvantage associated with a long lingual bar in dental prosthetics?
Flexibility if poorly constructed
In what situation would splinting of periodontally affected teeth be required in dental prosthetics?
When teeth have short clinical crowns
Why can lingual bars sometimes be considered unhygienic in dental prosthetics?
Cause food collection in open spaces
What modification can be made to lingual bars to provide more rigidity and strength?
Give indirect retention
Which statement about relief for mandibular major connectors is correct?
The amount of relief depends on the type of partial denture and lingual anatomy.
For a tooth-supported partial denture, what is the recommended relief for the mandibular major connector?
Minimal relief of 0.5 mm.
If the lingual tissue covering the alveolar ridge slopes towards the tongue, what is the recommended relief for the mandibular major connector?
Maximum relief of 1 mm.
If the lingual side of the alveolar ridge has an undercut, what is the recommended procedure for the mandibular major connector?
Block out the undercut in the laboratory.
What is the purpose of providing relief for mandibular major connectors?
To prevent lacerating the lingual mucosa during movement.
Which statement about the mandibular major connector is incorrect?
It should cross the palate in a straight line.
What is the minimum distance required between the border of the complete palatal plate and the gingival margin?
6 mm
Which of the following is NOT an advantage or indication for using a complete palatal plate?
Recommended for use in free-end cases
Which of the following materials can be used to fabricate a complete palatal plate?
All of the above
What is the primary advantage of using a complete palatal plate?
Provides maximum support and rigidity
Which of the following statements about the borders of a complete palatal plate is true?
Both A and B
Which of the following is a disadvantage of using a complete palatal plate?
All of the above
What is the purpose of the beading along the borders of maxillary major connectors?
To enhance retention, stability, and support
In what situation should relief be considered under maxillary major connectors?
In the absence of torus palatinus or prominent median palatine raphe
Why should both anterior and posterior borders of maxillary major connectors cross the midline at right angles?
To avoid diagonal contact with the soft tissue
What is a characteristic of the single palatal strap, a type of maxillary major connector?
Uniform thickness throughout
Why should relief generally be avoided under maxillary major connectors?
To enhance retention and stability
Why is it important for the metal on the tissue side of maxillary major connectors to be smooth but not highly polished?
To prevent food debris collection
Learn about the special structural requirements for maxillary major connectors in dental prosthetics, including the need for intimate contact with palatal soft tissue and specially prepared seals. Understand when relief is allowed under maxillary major connectors.
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