TTT of CD problems P2

Question 1

Why does a V-shaped palate reduce retention?

Answer 1

Retention is diminished because acrylic denture bases tend to warp during curing, leading to imperfect fit.

Question 2

What treatment can improve retention for a V-shaped palate?

Answer 2

A cast metal plate may produce a more accurate fit.

Question 3

Why does a flat palate with shallow ridges cause difficulty during mastication?

Answer 3

Lack of ridge support causes the denture to be displaced during mastication.

Question 4

How can the peripheral seal be improved in a flat palate with shallow ridges?

Answer 4

Careful peripheral adaptation and balanced articulation or cuspless teeth can help improve the seal.

Question 5

What is the challenge with gross undercuts and large tuberosities?

Answer 5

Retention is reduced as the denture must be trimmed to pass over the bulbous ridge, causing loss of seal.

Question 6

How can gross undercuts and large tuberosities be managed?

Answer 6

Block out the undercuts, perform an alveoloplasty, or use soft liners to engage the undercuts.

Question 7

What issue does a knife-like lower ridge cause during mastication?

Answer 7

It causes pain during mastication due to its sharp nature.

Question 8

How can a knife-like lower ridge be treated?

Answer 8

Relief, resilient lining, or alveoloplasty can help alleviate pain.

Question 9

Why does a large torus palatinus affect denture retention?

Answer 9

The denture may rock across the midline, leading to fractures, and retention is reduced.

Question 10

How can a large torus palatinus be treated?

Answer 10

Relief in the area, compression impression technique, or using a metal plate to resist strain fatigue.

Question 11

Why do abnormal frena reduce denture retention?

Answer 11

Frena attached near the crest of the ridge make the denture easier to displace.

Question 12

What is the treatment for abnormal frena?

Answer 12

A frenectomy (surgical division of frena) is performed to improve retention.

Question 13

How does a tight lip affect the lower denture?

Answer 13

Lip pressure and vertical lift in the premolar and canine region cause instability and displacement.

Question 14

What are some treatments for a tight lip affecting the lower denture?

Answer 14

Lower the occlusal plane, extend the denture over retromolar pads, and keep the denture narrow.

Question 15

Why does a large tongue cause denture instability?

Answer 15

The denture is moved during function if the tongue is cramped or teeth overhang the tongue space.

Question 16

How can you accommodate a large tongue when fitting dentures?

Answer 16

Lower the occlusal plane, create space for the tongue, and set anterior teeth slightly forward.

Question 17

What is the issue with a close bite in denture construction?

Answer 17

There is a lack of interridge space, making it difficult to construct the denture.

Question 18

What is the treatment for a close bite?

Answer 18

Use acrylic posterior teeth to adapt to the reduced space.

Question 19

Why does superior protrusion cause denture difficulties?

Answer 19

A narrow and retrusive lower arch in relation to a normal upper arch leads to challenges in retention.

Question 20

How can superior protrusion be managed in denture construction?

Answer 20

Maintain a natural large overjet, use peripherally adapted impression techniques, and balance articulation.

Question 21

What is the difficulty with inferior protrusion?

Answer 21

A large lower arch compared to the upper leads to an unstable upper denture.

Question 22

What treatments can address inferior protrusion in denture construction?

Answer 22

Use peripherally adapted impressions, a metal plate, balanced articulation, and cross-bite setup.

Question 23

Why does peripheral seal become compromised in gross undercut areas?

Answer 23

The denture may need trimming to pass over the bulbous area, which causes loss of the peripheral seal.

Question 24

How does a shallow ridge with flat palate affect denture function?

Answer 24

It leads to instability of the denture during mastication due to lack of ridge support.

Question 25

Why does a metal plate improve retention in a V-shaped palate?

Answer 25

A metal plate provides a more accurate fit and resists warping during curing, which improves retention.