COMPLEATE DENTURE

A complete denture (also known as a full denture, false teeth or plate) is a removable appliance used when all teeth within a jaw have been lost and need to be prosthetically replaced. In contrast to a partial denture, a complete denture is constructed when there are no more teeth left in an arch, hence it is an exclusively tissue-supported prosthesis. A complete denture can be opposed by natural dentition, a partial or complete denture, fixed appliances or, sometimes, soft tissues.

BASIC REQUIREMENTS FOR IMPRESSION MAKING
  1. Knowledge of Basic anatomy
  2. Knowledge of basic reliable technique
  3. Knowledge and understanding of impression materials
  4. Skill
  5. Patient management
OBJECTIVES OF IMPRESSION MAKING
  1. RETENTION
  2. STABILITY
  3. SUPPORT
  4. ESTHETICS
  5. PRESERVATION OF REMAINING STRUCTURES

RETENTION

  1. Retention is defined as the ability of denture to resist the displacement against vertical forces
  2. Retention resists the adhesiveness of food, the force of gravity, & the forces associated with the opening of jaws.
  3. Retention begins with the impression. It depends upon factors that produce attachment of the denture to the mucosa.

Factors affecting Retention

  1. Anatomical factors
  2. Physiological factors
  3. Physical factors
  4. Mechanical factors
  5. Muscular factors

Factors affecting RetentionAnatomical factors

  1. Size of the denture bearing area
  2. Quality of the denture bearing area.

Factors affecting RetentionPhysiological factors

  1. Saliva and its quality

Factors affecting RetentionPhysical factors

  1. Cohesion
  2. Adhesion
  3. Interfacial surface tension
  4. Capallarity and capillary attraction
  5. Atmospheric pressure and peripheral seal
Impression techniques may be classified depending on:

Amount of pressure used

  1. Pressure technique
  2. Minimal pressure technique
  3. Selective pressure techniqueb
  4. Based on the position of the mouth while making impression

  5. Open mouth
  6. Close mouth
  7. Based on the method of manipulation for border molding.

  8. Hand manipulation
  9. Functional movements