Introduction to Dental Materials Science Flashcards
what clinical stages does the behaviour of dental materials affect?
selection, preparation, placement, performance, patient expectations
what mark indicates that a material is safe to use?
CE mark
what are the different options for restorative materials?
amalgam, composites, glass ionomer cements, compomers, porcelain
what are the main types of impression materials?
impression compound, impression paste, hydrocolloids, elastomers
what type of impression material is alginate?
hydrocolloid
what are the different types of elastomers?
polysulphides, polyethers, silicones
what are the different types of metals/alloys?
amalgam, cobalt chromium, titanium, gold, stainless steel
what are the different groups of properties a material can have?
mechanical, chemical and physical
what does force applied to the material cause?
stretch/compress, deform, fracture
what are the different types of force?
compressive (vertical forces pushing material together), tensile (horizontal forces pulling material apart) and shear (force coming from one side pushing the material)
on the stress strain curve where is the proportional limit?
where the slope ends and starts to curve
on the stress strain curve what is the elastic modulus?
the angle between the slop and the strain
on the stress strain curve what is the fracture stress?
the end of the entire line at the curve
what are the mechanical properties of enamel?
brittle, hard, strong and rigid
what type of force is the tooth subjected to when biting
compressive
