Week 2 Flashcards
Factors that affect what dental materials are chosen (5)
Extend of decay
Type of defect in tooth
Condition of mouth
Location of restoration
Cost factors
Most common restorative + esthetic dental materials (7)
Amalgam
Composite resin
Glass ionomer
Temporary restorative materials
Tooth-whitening products
Gold alloy
Ceramic castings
Restorative dental materials
Bring back the proper functionality of the tooth
Esthetic dental materials
Improves the appearance of teeth by camouflaging defects and whitening teeth
Who regulates the marketing of dental materials (2)
The council on Dental Materials, Instruments and Equipment
American Dental Association (ADA)
Criteria for new dental material (6)
Non harmful
Non irritating
Help tooth and tissues
Resemble natural dentition + esthetically pleasing
Easily formed + placed in mouth
Confirm + function despite limited access in wet conditions with poor visibility
Mechanical properties of DMs
Force
Stress
Strain
Force
Any push or pull on matter that produces stress and strain
Stress
Internal resistance / force that can cause distortion
Strain
The change / deformation of a material as the result of stress
3 types of stress and strain + the type of force exerted
Tensile (pull/stretch)
Compressive (compression)
Shear (cutting, shaving)
Ductility
Capacity of a metal to be stretched by tensile force (wire)
Malleability
Capacity of a metal to be extended in all directions by a compressive force (metal sheet)
Dangers of thermal change in the mouth (2)
Contraction + expansion of dental materials
Pulp can get thermal shock from extreme changes
Micro leakage / faulty restoration
When DM fails causing it to pull away from the tooth and let fluids, debris and microorganisms enter
