HOSA DENTAL SCIENCE CERTIFICATION
EXAMINATION 2026 QUESTIONS WITH
SOLUTIONS GRADED A+
◉ Roentgen (R). Answer: basic unit of exposure to radiation; C/kg
◉ Rad (radiation absorbed dose). Answer: unit of absorbed radiation; Gy
◉ Rem (roentgen equivalent measure). Answer: unit of radiation needed
to produced same biological effect of one R; Sv
◉ Erythema Dose. Answer: radiation overdose that produces redness of
the skin
◉ Dosimeter. Answer: device to measure the amount of stray/secondary
radiation
◉ Lead Barriers, Shields. Answer: device that blocks out scattered
radiation
,◉ Phantom. Answer: device used for practice in learning radiation-
exposure techniques; Dexter
◉ Express Contract. Answer: Verbal or written words that are agreed on
in an established contract
◉ Liner applicator. Answer: To place calcium hydroxide or glass
ionomer in cavity preparation.
◉ Amalgam plugger. Answer: used to pack amalgam into tooth
◉ Sterilize. Answer: the process where ALL forms of life are completely
destroyed. This includes all microorganisms; bacteria, fungi, viruses and
bacterial spores. (Eg - autoclave, chemical vapor sterilization and dry
heat sterilization)
◉ Disinfect. Answer: the process where SOME forms of
microorganisms are destroyed. it does not destroy spores and resistant
viruses.
◉ Sanitize. Answer: the process that cleans and destroys FEW
microorganisms
◉ Distal. Answer: farthest from the midline
,◉ Root Canal Therapy. Answer: process of removing pulp of a tooth and
filling it with an inert material.
◉ palate. Answer: hard and soft tissue forming the roof of the mouth
◉ Broad-spectrum activity. Answer: capable of killing a wide variety of
microbes
◉ Bioburden. Answer: any visible organic debris, blood saliva and other
body fluids
◉ Unerupted tooth. Answer: a tooth that has not pushed through the gum
and assumed its correct position in the dental arch
◉ quadrant. Answer: 1/2 of one dental arch
◉ abfraction. Answer: loss of tooth surface in cervical area
◉ ameloblast. Answer: enamel forming cells
◉ angle of the mandible. Answer: area from which the ramus ascends on
the lower border of the mandible
, ◉ apex. Answer: root end of tooth
◉ biteblock. Answer: device used to hold radiation film in mouth for
exposure
◉ biteloop. Answer: encircles periapical film
◉ buccinator. Answer: principal cheek muscle
◉ cnaliculi. Answer: small channels or canals may be present in
cementum
◉ candidiasis. Answer: infection of mouth, thrush
◉ cantilever bridge. Answer: only one side of device attatched
◉ cheilosis. Answer: inflammation of lips
◉ cingulum. Answer: smooth, convex, or rounded bump on lingual of
maxillary anteriors
EXAMINATION 2026 QUESTIONS WITH
SOLUTIONS GRADED A+
◉ Roentgen (R). Answer: basic unit of exposure to radiation; C/kg
◉ Rad (radiation absorbed dose). Answer: unit of absorbed radiation; Gy
◉ Rem (roentgen equivalent measure). Answer: unit of radiation needed
to produced same biological effect of one R; Sv
◉ Erythema Dose. Answer: radiation overdose that produces redness of
the skin
◉ Dosimeter. Answer: device to measure the amount of stray/secondary
radiation
◉ Lead Barriers, Shields. Answer: device that blocks out scattered
radiation
,◉ Phantom. Answer: device used for practice in learning radiation-
exposure techniques; Dexter
◉ Express Contract. Answer: Verbal or written words that are agreed on
in an established contract
◉ Liner applicator. Answer: To place calcium hydroxide or glass
ionomer in cavity preparation.
◉ Amalgam plugger. Answer: used to pack amalgam into tooth
◉ Sterilize. Answer: the process where ALL forms of life are completely
destroyed. This includes all microorganisms; bacteria, fungi, viruses and
bacterial spores. (Eg - autoclave, chemical vapor sterilization and dry
heat sterilization)
◉ Disinfect. Answer: the process where SOME forms of
microorganisms are destroyed. it does not destroy spores and resistant
viruses.
◉ Sanitize. Answer: the process that cleans and destroys FEW
microorganisms
◉ Distal. Answer: farthest from the midline
,◉ Root Canal Therapy. Answer: process of removing pulp of a tooth and
filling it with an inert material.
◉ palate. Answer: hard and soft tissue forming the roof of the mouth
◉ Broad-spectrum activity. Answer: capable of killing a wide variety of
microbes
◉ Bioburden. Answer: any visible organic debris, blood saliva and other
body fluids
◉ Unerupted tooth. Answer: a tooth that has not pushed through the gum
and assumed its correct position in the dental arch
◉ quadrant. Answer: 1/2 of one dental arch
◉ abfraction. Answer: loss of tooth surface in cervical area
◉ ameloblast. Answer: enamel forming cells
◉ angle of the mandible. Answer: area from which the ramus ascends on
the lower border of the mandible
, ◉ apex. Answer: root end of tooth
◉ biteblock. Answer: device used to hold radiation film in mouth for
exposure
◉ biteloop. Answer: encircles periapical film
◉ buccinator. Answer: principal cheek muscle
◉ cnaliculi. Answer: small channels or canals may be present in
cementum
◉ candidiasis. Answer: infection of mouth, thrush
◉ cantilever bridge. Answer: only one side of device attatched
◉ cheilosis. Answer: inflammation of lips
◉ cingulum. Answer: smooth, convex, or rounded bump on lingual of
maxillary anteriors
