21. Retention of a denture mainly depends on:
A. Tooth shape
B. Peripheral seal
C. Patient age
D. Denture color
Answer: B
22. Adhesion refers to:
A. Attraction between saliva molecules
B. Attraction between denture and saliva
C. Mechanical locking
D. Muscle activity
Answer: B
23. Cohesion is:
A. Attraction between unlike molecules
B. Attraction between saliva molecules
C. Atmospheric pressure
D. Tissue rebound
Answer: B
24. Mechanical interlock is related to:
A. Smooth surfaces
B. Undercuts
C. Saliva viscosity
D. Denture weight
Answer: B
25. Which factor greatly influences denture retention?
A. Eye color
B. Muscle control
C. Hair type
D. Height
Answer: B
26. The mandibular basal seat differs from the maxillary because of:
A. Color
B. Size and form
C. Taste
D. Temperature
Answer: B
27. The tongue complicates impressions for:
A. Maxillary denture
B. Mandibular denture
C. Partial denture
D. Fixed prosthesis
Answer: B
28. Support area for edentulous mandible is approximately:
A. 24 cm²
B. 30 cm²
C. 14 cm²
D. 10 cm²
Answer: C
29. Support area for edentulous maxilla is approximately:
A. 14 cm²
B. 24 cm²
C. 10 cm²
D. 40 cm²
Answer: B
30. The main support for mandibular denture comes from:
A. Tongue
B. Body of mandible
C. Lips
D. Cheeks
Answer: B
🔸 Questions 31–40
31. Mucostatic impression technique records tissues:
A. Under pressure
B. At rest
C. During chewing
D. During speech
Answer: B
32. Border molding in mucostatic technique is:
A. Essential
B. Not done
C. Done twice
D. Done with wax only
Answer: B
33. Mucostatic technique uses material with:
A. High viscosity
B. Low viscosity
C. Hard consistency
D. Metal base
Answer: B
34. A disadvantage of mucostatic technique is:
A. Good retention
B. Poor peripheral seal
C. Tissue damage
D. Overcompression
Answer: B
35. Mucocompressive technique records tissues:
A. At rest
B. Without tray
C. Under functional pressure
D. Digitally
Answer: C
36. Functional impression technique records tissues:
A. In anatomical form
B. In displaced functional form
C. Without pressure
D. With no material
Answer: B
37. A problem with pressure technique is:
A. Improved blood circulation
B. Tissue rebound causing displacement
C. Increased ridge height
D. No retention
Answer: B
38. Selective pressure technique applies pressure to:
A. Non-bearing areas
B. Primary stress-bearing areas
C. Frenum
D. Tongue
Answer: B
39. Relief in selective pressure technique is greater in:
A. Stress-bearing areas
B. Non-bearing areas
C. Posterior palate
D. Retromolar pad
Answer: B
40. Selective pressure technique aims to:
A. Eliminate retention
B. Optimize stability and retention
C. Reduce denture size
D. Change occlusion
Answer: B
41. Open mouth impression is made when:
A. Mouth closed tightly
B. Mouth open without pressure
C. Patient chewing
D. During sleep
Answer: B
42. Open mouth technique provides:
A. Tissue compression
B. Clearance for movable tissues
C. Increased ridge height
D. Digital scanning
Answer: B
43. Closed mouth impression requires:
A. No trays
B. Wax occlusal rims
C. Metal crowns
D. Digital scanner
Answer: B
44. Closed mouth technique helps form borders by:
A. Sleeping
B. Tissue manipulation like swallowing
C. Talking only
D. Removing tray
Answer: B
45. Primary impression is:
A. Final impression
B. Preliminary impression
C. Digital impression
D. Functional impression
Answer: B
46. Secondary impression is also called:
A. Preliminary impression
B. Final impression
C. Digital impression
D. Diagnostic cast
Answer: B
47. Alginate is commonly used for:
A. Final impression only
B. Primary impression
C. Crown fabrication
D. Denture polishing
Answer: B
48. Zinc oxide eugenol is used for:
A. Primary impression
B. Final impression
C. Temporary crowns
D. Orthodontics
Answer: B
49. Elastomeric materials belong to:
A. Rubber base materials
B. Metals
C. Ceramics
D. Acrylics
Answer: A
50. Border seal areas function to:
A. Support denture weight
B. Limit denture extension
C. Change occlusion
D. Improve esthetics only
Answer: B
2February 28, 2026 273 7
