TCDHA DM Theory Test 1 & Midterm-questions with correct solutions

Hydrocolloid a water-based, used as an elastic impression material sources of flouride water, toothpaste, food galvanic shock when two fillings of dissimilar metal are placed too close together and cause an electric charge Percolation space between tooth and restoration amalgam restoration silver filling composite restoration Tooth colored filling Restorative material functions when hard, strong (yeild strength) and stiff (modulus strength) most dense tooth structure enamel most dense restorative material Gold ultimate strength the maximum amount of stress a material can withstand without breaking silicone must not be mixed with latex gloves ductility dimensional change without breaking retainer fits over abutment metamerism colors appear different in different light pontic artificial tooth Cavitron is a high frequency sound wave scaler Mechanical retention Allows material to be locked into place when doing an undercut detection of restorative material tactile sensitivity, appearance, location, radiographs ________is harder than_________ composite resin, enamel Thixotropic materials material that flow more easily under mechanical forces Initial set time 20mins Periodontal dressing Bandage applied to protect a surgical site as it heals Gypsum products positive reproductions type _____ impression plaster 1 type _____ model plaster 2 type ____ dental stone 3