NTR University of Health Sciences (NTRUHS) 2008 B.D.S Dental Surgery -DENTAL MATERIALS

Dr. NTR University of Health Sciences

B.D.S. DEGREE exam – FEBRUARY, 2008
FIRST BDS exam
DENTAL MATERIALS & METLLURGY

Time : three Hours Max. Marks : 70
Note: ans Part A & B in separate ans books. ques. in Part’A’ should not be answered in Part’B’ and vice versa. Otherwise they will not be valued.
ans all ques..
PART – A (35 MARKS)

Classify Impression Materials. define the Composition, setting 9
reaction, manipulation of Impression Compound.

WRITE SHORT NOTES ON: 4x4=16
Light cure Composite resin
Hygroscopic setting Expansion
Composition of Alginate Impression material
Duplicating Materials

WRITE BRIEFLY ON: 5x2=10
Crosslinking agents for Acrylic resin
Separating Media
Polyurethane polymer
Soft liner
Ductility and Malleability

PART – B (35 MARKS)

Classify Dental Cements. Add a note on Glass ionomer Cement. 9

WRITE SHORT NOTES ON: 4x4=16
Zinc Oxide Eugenol Cement
Stages of firing of Dental Porcelain
Metal-Ceramics
Abrasives and Polishing agents

WRITE BRIEFLY ON: 5x2=10
Annealing
Mechanical Trituration
Divestment
Flux
Nitinol
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Earning:   Approval pending.