Test 3 Ch 9&11 Flashcards
What is a high noble?
Over 60% noble metal, 40% gold, resists tarnish and corrosion.
What is a noble?
Has at least 25% noble metal.
What is a non-noble?
Base metal, 0-25% noble metal, contains nickel (allergy), silver, tin copper. etc. subject to tarnish and corrode.
Pressed to metal porcelain or pressed over metal
Uses a synthetic porcelain, usually lithium disilicate, less likely to fracture, single piece construction, no black line bcs can be full ceramic on facial aspect.
CAD/CAM system
chairside procedure, one visit, no impressions needed, scan preparation, no lab fees or temp crown, only one anesthetic.
What are the three components of CAD/CAM system?
scanner, design software, milling device.
What are purposes of vaneers?
Can be used to lighten color of teeth, cover stains, repair chips/defects, lengthen worn teeth, inc size of teeth, close spaces.
What are some disadvantages of vaneers?
A lot of enamel of teeth must be removed, require deeper preparation, can be hard to hide dark teeth, not super strong if made thin.
What is glazing?
Provides smooth/shiny surface to teeth.
Maintaining of ceramics intraorally involves
Tin oxide
Maintaining ceramics extraorally involves
Rouge (in lab)
Some restoration failure factors are
Caries and fracture to ceramic material.
