Denture Retention and Stability Quiz

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Questions and Answers

What factor is directly proportional to the surface area covered for maxillary denture retention?

Cohesion

Interfacial surface tension

Adhesion (correct)

Viscosity

Which anatomical factor enhances retention by permitting excellent peripheral seal for the lower denture?

Soft palate anatomy

Arch relationship

Tongue size (correct)

Ridge height

What is considered retentive to the lower denture and displacing to the upper denture?

Gravity (correct)

Adhesion

Interfacial surface tension

Cohesion

What is the potential space where forces from the lips & cheeks on one side are neutralized by those of the tongue on the other side?

Neutral zone Signup and view all the answers

What surgical procedure involves deepening of the vestibule to gain ridge height?

Vestibuloplasty Signup and view all the answers

What psychological factor influences the ability of some patients to cope and use the denture?

Acquired muscle control - adaptation Signup and view all the answers

What is the first factor to consider for a denture to be stable?

Retention Signup and view all the answers

What type of palate provides the most favorable retention and stability for dentures?

U-shaped palate Signup and view all the answers

What action is known as 'lever balance' in denture stability?

Inclined plane action Signup and view all the answers

What factor decreases the amount of load falling on the denture by having a width less than the natural?

Width of the occlusal table Signup and view all the answers

What is the definition of retention in dentistry?

The ability of the denture to resist vertical tissue away movement Signup and view all the answers

What is the definition of stability in dentistry?

The quality of the denture to be firm and steady when functional forces are applied Signup and view all the answers

Which factor affects retention due to capillary attraction?

Interfacial surface tension Signup and view all the answers

What is the role of atmospheric pressure in denture retention?

Forms a partial vacuum between the mucosa and the denture Signup and view all the answers

What is the main factor contributing to adhesion in denture retention?

Physical attraction between unlike molecules (Denture-saliva-mucosa) Signup and view all the answers

What is the result of interfacial surface tension between well-adapted surfaces?

Resistance to separation Signup and view all the answers

How does capillary attraction affect denture retention?

The space filled with a thin film of saliva acts like a capillary tube and retains the denture Signup and view all the answers

What is the role of viscosity in denture retention?

Affects the ability of the fluid to wet surrounding surfaces Signup and view all the answers

What is the effect of gravity on denture retention?

Impacts the degree of adaptation between the denture base and the mucosa Signup and view all the answers

Which factor contributes to the formation of a partial vacuum between the mucosa and the denture?

Atmospheric pressure Signup and view all the answers

Study Notes

Surface Area

The surface area covered by the maxillary denture is directly proportional to its retention.

Anatomical Factors

The presence of a prominent buccal shelf enhances retention by providing a good peripheral seal for the lower denture.
The tongue, in the lower denture, is considered retentive, while it displaces the upper denture.

Vestibular Space

The potential space between the lips/cheeks and the tongue helps neutralize the forces on either side.

Surgical Procedures

Vestibuloplasty involves deepening the vestibule to increase ridge height.

Psychological Factors

Patient perception and coping skills significantly influence denture use and adaptation.

Stability and Retention

Stability is the first factor to consider for a denture to be stable.
A hard palate offers optimal retention and stability for dentures.
Lever balance refers to the concept of balancing forces during chewing and swallowing.
Width of the denture base, if smaller than the natural teeth, reduces the load on the denture.

Denture Definitions

Retention refers to the resistance to vertical displacement of the denture.
Stability refers to the resistance to horizontal or rotational movement of the denture.

Factors Affecting Retention

Salivary lubrication contributes to retention through capillary attraction.
Atmospheric pressure creates a partial vacuum between the denture and the mucosa, enhancing retention.
Adhesion is mainly influenced by surface tension between the denture and the mucosa.
Interfacial surface tension creates cohesiveness between properly adapted surfaces.
Capillary attraction allows the saliva to act as a cohesive force, holding the denture against the tissues.
Viscosity of saliva affects the rate and effectiveness of capillary attraction.
Gravity can negatively impact retention, particularly for lower dentures.

Other Factors

Partial Vacuum formation between the denture and the mucosa is due to the well- adapted surfaces and atmospheric pressure.

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Description

Test your knowledge of denture retention and stability with this quiz. Explore biological, physical, and mechanical factors that affect denture stability and retention, and understand the importance of psychological comfort and physiological support in denture design.