OHS Exam 1 UPDATED QUESTIONS
AND CORRECT ANSWERS
occlusion - CORRECT ANSWER The contact between maxillary and mandibular teeth
Dentition - CORRECT ANSWER All teeth in our mouth
Diphydont - CORRECT ANSWER two sets of teeth (human dentition)
Heterodonts - CORRECT ANSWER multiple types of teeth - canines, incisors, molars,
pre-molars
How many teeth in primary dentition? - CORRECT ANSWER 20 (10 on each arch, 5
on each quadrant).
How many teeth in permanent dentition? - CORRECT ANSWER 32 (16 on each arch,
8 on each Quadrant).
What does primary dentition lack? - CORRECT ANSWER Premolars
Edentulous - CORRECT ANSWER no teeth
What time frame is edentulous? - CORRECT ANSWER Birth to 6 months
When is primary dentition only seen? - CORRECT ANSWER 6 months to 6 years
When is mixed dentition present? - CORRECT ANSWER from 6 to 12 years
When is adult/ permanent dentition seen? - CORRECT ANSWER 12 to 17 years
,When is 3rd molar eruption? - CORRECT ANSWER 17+
What adult teeth replace primary molars? - CORRECT ANSWER Permanent
premolars
How many of each tooth does primary dentition include? - CORRECT ANSWER 2
molars, 1 canine, 2 incisors
How many of each tooth does permanent dentition include? - CORRECT ANSWER 3
molars, 2 premolars, 1 canine, 2 incisors
How many roots do primary maxillary molars have? - CORRECT ANSWER 3 roots
How many roots do permanent maxillary molars have? - CORRECT ANSWER 3 roots
How many roots do permanent maxillary premolars have? - CORRECT ANSWER 1
root
What is the purpose of anterior teeth? - CORRECT ANSWER Pointed for biting and
tearing
Which teeth are classified as anterior teeth? - CORRECT ANSWER Incisors and
canines
What is the purpose of posterior teeth? - CORRECT ANSWER Flat for grinding and
chewing
What teeth are classified as posterior teeth? - CORRECT ANSWER Premolars and
molars
, How many incisors are in each arch? - CORRECT ANSWER 4
What is the difference between central and lateral incisors? - CORRECT
ANSWER Lateral are slightly smaller
What are the characteristics of incisors? - CORRECT ANSWER Single rooted, arched
crowns, 1 sharp Incisal edge, no cusps
Do incisors have cusps? - CORRECT ANSWER NO
What is the function of incisors? - CORRECT ANSWER To cut or incise food
How many canines in an arch? - CORRECT ANSWER 2
Which tooth has the longest root? - CORRECT ANSWER canine
How many cusps do canines have? - CORRECT ANSWER One
True or false: the only anterior tooth with a cusp is the canine? - CORRECT
ANSWER True
What is the function of the canine? - CORRECT ANSWER Hold, grasp, and tear food
What is the canine also called? - CORRECT ANSWER The cornerstone of the mouth
How many premolars in each arch? - CORRECT ANSWER Four
How many cusps do premolars have? - CORRECT ANSWER 2 cusps - bicuspid
AND CORRECT ANSWERS
occlusion - CORRECT ANSWER The contact between maxillary and mandibular teeth
Dentition - CORRECT ANSWER All teeth in our mouth
Diphydont - CORRECT ANSWER two sets of teeth (human dentition)
Heterodonts - CORRECT ANSWER multiple types of teeth - canines, incisors, molars,
pre-molars
How many teeth in primary dentition? - CORRECT ANSWER 20 (10 on each arch, 5
on each quadrant).
How many teeth in permanent dentition? - CORRECT ANSWER 32 (16 on each arch,
8 on each Quadrant).
What does primary dentition lack? - CORRECT ANSWER Premolars
Edentulous - CORRECT ANSWER no teeth
What time frame is edentulous? - CORRECT ANSWER Birth to 6 months
When is primary dentition only seen? - CORRECT ANSWER 6 months to 6 years
When is mixed dentition present? - CORRECT ANSWER from 6 to 12 years
When is adult/ permanent dentition seen? - CORRECT ANSWER 12 to 17 years
,When is 3rd molar eruption? - CORRECT ANSWER 17+
What adult teeth replace primary molars? - CORRECT ANSWER Permanent
premolars
How many of each tooth does primary dentition include? - CORRECT ANSWER 2
molars, 1 canine, 2 incisors
How many of each tooth does permanent dentition include? - CORRECT ANSWER 3
molars, 2 premolars, 1 canine, 2 incisors
How many roots do primary maxillary molars have? - CORRECT ANSWER 3 roots
How many roots do permanent maxillary molars have? - CORRECT ANSWER 3 roots
How many roots do permanent maxillary premolars have? - CORRECT ANSWER 1
root
What is the purpose of anterior teeth? - CORRECT ANSWER Pointed for biting and
tearing
Which teeth are classified as anterior teeth? - CORRECT ANSWER Incisors and
canines
What is the purpose of posterior teeth? - CORRECT ANSWER Flat for grinding and
chewing
What teeth are classified as posterior teeth? - CORRECT ANSWER Premolars and
molars
, How many incisors are in each arch? - CORRECT ANSWER 4
What is the difference between central and lateral incisors? - CORRECT
ANSWER Lateral are slightly smaller
What are the characteristics of incisors? - CORRECT ANSWER Single rooted, arched
crowns, 1 sharp Incisal edge, no cusps
Do incisors have cusps? - CORRECT ANSWER NO
What is the function of incisors? - CORRECT ANSWER To cut or incise food
How many canines in an arch? - CORRECT ANSWER 2
Which tooth has the longest root? - CORRECT ANSWER canine
How many cusps do canines have? - CORRECT ANSWER One
True or false: the only anterior tooth with a cusp is the canine? - CORRECT
ANSWER True
What is the function of the canine? - CORRECT ANSWER Hold, grasp, and tear food
What is the canine also called? - CORRECT ANSWER The cornerstone of the mouth
How many premolars in each arch? - CORRECT ANSWER Four
How many cusps do premolars have? - CORRECT ANSWER 2 cusps - bicuspid
