87 complete denture. elements. retention and stabilisation of complete dentures

what is complete denture

removable dental prosthesis, that replaces the entire dentition and associated structures of the maxillae or mandible; called also a complete removable dental prosthesis or a full denture.

elemenst of complete denture

• denture base - part of denture that rests on foundation tissues and to which teeth are attached

• artificial teeth

• denture base saddle - part of denture that rests on oral mucosa and to which teeth are attached

• denture supporting structure - tissue that serve as the foundation for removable partial or complete dentures

• denture foundation area - surface of oral structures available to support the denture

• denture border - margin of denture base at the junction of polished surface and impression surface

• denture space - portion of oral cavity that is or may be occupied by maxillary and/or mandibular denture

indications for complete denture

• edentulous patient

• extensive bone loss and periodontal disease

• lack of financial resources for alternative treatments

main function for complete dentures is?

restores:

form

function

esthetics

what is denture retention

resistance in the movement of a denture away from its tissue foundation especially in a vertical direction

what is denture stability

resistance of a denture to movement on its tissue foundation, especially to lateral (horizontal) forces as opposed to vertical displacement

factors effecting degree of retention

• anatomical

  • Size of the denture bearing area

  • Quality of the denture bearing area

  • Parallel ridge walls

• physiological

  • saliva

• physical

  • adhesion (saliva)

  • cohesion

  • interfacial surface tension

• mechanical

  • undercuts

  • retentive springs

  • magnetic forces

• muscular

  • oral musculature

  • facial musculature

types of retention

• primary retention

  • physical means

  • mechanical means

• secondary retention

  • surrounding musculature

  • shape of denture borders and flanges

  • psychological factors

dislodging of complete dentures factors

• mastication

• adhesive food

• gravity

• surrounding musculature

• occlusal prematurity

• parafunctional habits