TCDHA DENTAL MATERIALS MIDTERM
ACTUAL EXAM SCRIPT 2026 COMPLETE
QUESTIONS AND CORRECT ANSWERS
VERIFIED SOLUTIONS GRADED A+
⩥ The rate of abrasion is increased by use of:
Answer: -Greater pressure on the abrasive tool
-Greater speed on the tool
⩥ Final polishing of a dental amalgam to the smoothest surface is
achieved by:
Answer: Use of tin oxide
⩥ Which of the following statements about prophylactic pastes are true?
Answer: USE prophylactic paste before the application of fluoride gel to
make the enamel accessible and more reactive to the fluoride
⩥ Desirable effects of toothbrushing are:
Answer: -Reduction of incidence of dental caries
-Maintenance of a healthy gingival
-Reduction in intensity of mouth odors
-Enhancement of personal appearance
,⩥ The components in a dentrifice may include:
Answer: -An abrasive such as insoluble sodium metaphosphate
(bicarbonate)
-A therapeutic agent such as stannous fluoride
-A humectants such as glycerin
-A sweetening agent such as sorbitol
⩥ Which of the following surfaces are particularly susceptible to
abrasion by dentifrices?
Answer: o Cementum
o Dentin
o Acrylic denture resins
o Composite Resins
⩥ Which of the following statements about denture cleaners are true?
Answer: o Do not soak dentures in hot water because the heat may cause
the acrylic denture to become distorted
o Customary 15-min soaking of a denture with chemical cleansers is
effective neither on mature plaque nor on some stains and deposits
o Some chemical denture cleaners may cause corrosion of base metal
components of a denture
, ⩥ Which of the following statements are true?
Answer: o Bowing wax is used for forming a mold around an impression
before a gypsum cast is poured
o Utility wax must stick to itself
o Utility wax is used to prevent sag and distortion of an alginate
impression in a tray
o Sticky wax is used to assemble metallic of resin pieces in affixed
temporary position and is brittle at room temp
⩥ Which of the following statements apply to bite-registration waxes?
Answer: o They are used to articulate models of opposing quadrants
accurately
o These waxes can be distorted when removed from the mouth
⩥ Casting waxes possess useful properties such as
Answer: -tackiness
-No residue other than carbon
⩥ The noble metals used in dentistry include:
Answer: o Gold
o Platinum
o Palladium
ACTUAL EXAM SCRIPT 2026 COMPLETE
QUESTIONS AND CORRECT ANSWERS
VERIFIED SOLUTIONS GRADED A+
⩥ The rate of abrasion is increased by use of:
Answer: -Greater pressure on the abrasive tool
-Greater speed on the tool
⩥ Final polishing of a dental amalgam to the smoothest surface is
achieved by:
Answer: Use of tin oxide
⩥ Which of the following statements about prophylactic pastes are true?
Answer: USE prophylactic paste before the application of fluoride gel to
make the enamel accessible and more reactive to the fluoride
⩥ Desirable effects of toothbrushing are:
Answer: -Reduction of incidence of dental caries
-Maintenance of a healthy gingival
-Reduction in intensity of mouth odors
-Enhancement of personal appearance
,⩥ The components in a dentrifice may include:
Answer: -An abrasive such as insoluble sodium metaphosphate
(bicarbonate)
-A therapeutic agent such as stannous fluoride
-A humectants such as glycerin
-A sweetening agent such as sorbitol
⩥ Which of the following surfaces are particularly susceptible to
abrasion by dentifrices?
Answer: o Cementum
o Dentin
o Acrylic denture resins
o Composite Resins
⩥ Which of the following statements about denture cleaners are true?
Answer: o Do not soak dentures in hot water because the heat may cause
the acrylic denture to become distorted
o Customary 15-min soaking of a denture with chemical cleansers is
effective neither on mature plaque nor on some stains and deposits
o Some chemical denture cleaners may cause corrosion of base metal
components of a denture
, ⩥ Which of the following statements are true?
Answer: o Bowing wax is used for forming a mold around an impression
before a gypsum cast is poured
o Utility wax must stick to itself
o Utility wax is used to prevent sag and distortion of an alginate
impression in a tray
o Sticky wax is used to assemble metallic of resin pieces in affixed
temporary position and is brittle at room temp
⩥ Which of the following statements apply to bite-registration waxes?
Answer: o They are used to articulate models of opposing quadrants
accurately
o These waxes can be distorted when removed from the mouth
⩥ Casting waxes possess useful properties such as
Answer: -tackiness
-No residue other than carbon
⩥ The noble metals used in dentistry include:
Answer: o Gold
o Platinum
o Palladium
