NTR University of Health Sciences (NTRUHS) 2006 B.D.S Dental Surgery -DENTAL MATERIALS AND METALLURGY-RUARY- - Question Paper

Dr. NTR University of Health Sciences

BDS-DENTAL MATERIALS AND METALLURGY-FEBRUARY-2006 Time:3hours -Marks: 70

Part-A
1. Classify composite resins and define in detail the composition, properties and uses of hybrid composites=9m
2. Write short answers on: four x four =16m; a) Free radical polymerization
b) Composition and properties of alginate impression material
c) Setting reaction and chemical stages in setting of gypsum d) Stress-Strain curve
3. Write briefly on: five x two =10m; a) Significance of fusion temperature of impression compound
b) Non-eugenol impression paste c) Fissure conditioners d) Activators and intiator in cold acrylic resins
e) Composition of Additions Silicone impression material
Part-B
4. Classify Dental cements according to the use and provide in detail the composition, setting reaction and properties
of zinc polycarboxylate cements=9m
5. Write short answers on: four x four =16m; a) Properties of Dental amalgam b) kinds of Direct filling gold
c) Stabilization and sensitization of stainless steel d) Porosites in dental casting
6. Write brief answers on: five x two =10m; a) Sticky wax b) Softening heat treatment c) Uses of Titanium
d) Polishing agents for cast restorations e) Giazing

Earning:   Approval pending.