TTT of CD problems P2 Flashcards
Why does a V-shaped palate reduce retention?
Retention is diminished because acrylic denture bases tend to warp during curing, leading to imperfect fit.
What treatment can improve retention for a V-shaped palate?
A cast metal plate may produce a more accurate fit.
Why does a flat palate with shallow ridges cause difficulty during mastication?
Lack of ridge support causes the denture to be displaced during mastication.
How can the peripheral seal be improved in a flat palate with shallow ridges?
Careful peripheral adaptation and balanced articulation or cuspless teeth can help improve the seal.
What is the challenge with gross undercuts and large tuberosities?
Retention is reduced as the denture must be trimmed to pass over the bulbous ridge, causing loss of seal.
How can gross undercuts and large tuberosities be managed?
Block out the undercuts, perform an alveoloplasty, or use soft liners to engage the undercuts.
What issue does a knife-like lower ridge cause during mastication?
It causes pain during mastication due to its sharp nature.
How can a knife-like lower ridge be treated?
Relief, resilient lining, or alveoloplasty can help alleviate pain.
Why does a large torus palatinus affect denture retention?
The denture may rock across the midline, leading to fractures, and retention is reduced.
How can a large torus palatinus be treated?
Relief in the area, compression impression technique, or using a metal plate to resist strain fatigue.
Why do abnormal frena reduce denture retention?
Frena attached near the crest of the ridge make the denture easier to displace.
What is the treatment for abnormal frena?
A frenectomy (surgical division of frena) is performed to improve retention.
How does a tight lip affect the lower denture?
Lip pressure and vertical lift in the premolar and canine region cause instability and displacement.
What are some treatments for a tight lip affecting the lower denture?
Lower the occlusal plane, extend the denture over retromolar pads, and keep the denture narrow.
Why does a large tongue cause denture instability?
The denture is moved during function if the tongue is cramped or teeth overhang the tongue space.
How can you accommodate a large tongue when fitting dentures?
Lower the occlusal plane, create space for the tongue, and set anterior teeth slightly forward.
What is the issue with a close bite in denture construction?
There is a lack of interridge space, making it difficult to construct the denture.
What is the treatment for a close bite?
Use acrylic posterior teeth to adapt to the reduced space.
Why does superior protrusion cause denture difficulties?
A narrow and retrusive lower arch in relation to a normal upper arch leads to challenges in retention.
How can superior protrusion be managed in denture construction?
Maintain a natural large overjet, use peripherally adapted impression techniques, and balance articulation.
What is the difficulty with inferior protrusion?
A large lower arch compared to the upper leads to an unstable upper denture.
What treatments can address inferior protrusion in denture construction?
Use peripherally adapted impressions, a metal plate, balanced articulation, and cross-bite setup.
Why does peripheral seal become compromised in gross undercut areas?
The denture may need trimming to pass over the bulbous area, which causes loss of the peripheral seal.
How does a shallow ridge with flat palate affect denture function?
It leads to instability of the denture during mastication due to lack of ridge support.
Why does a metal plate improve retention in a V-shaped palate?
A metal plate provides a more accurate fit and resists warping during curing, which improves retention.
