dentistry terms

Question 1

what is a normal occlusion?

Answer 1

scissor bite
upper incisors are rostral to the mandibular incisors
lower canines fit in the “diastema” between the upper maxillary canine and third incisor (should not touch)
lower first premolar are more ROSTRAL w/ the upper arcade fitting into spaces and forming a zig zag patter

Question 2

Mesocephalic

Answer 2

well-proportioned skull width and maxillary length

Question 3

Class I malocclusion

Answer 3

also known as “neutrocclusion”

maxillary and mandible correctly proportioned BUT one or more teeth are misaligned

Question 4

Rostral crossbite (RXB)

Answer 4

also known as “anterior cross bite”

one or more of the maxillary INCISORS are LINGUAL to the mandibular INCISORS

Question 5

Caudal crossbite (CXB)

Answer 5

also known as “posterior cross bite”

mandible is WIDER than maxilla in the area of the PREMOLARS

normal relationship of CARNASSIALS is reversed: the MAXILLARY 4th premolar is now LINGUAL to the MANDIBULAR first molar

Question 6

Dolichocephalic breeds tend to have a ______ crossbite

Answer 6

caudal

Question 7

Linguoversion (LV)

Answer 7

also known as BASE-NARROWED CANINES

mandibular canines are in correct anatomic position BUT are lingually displaced

can cause trauma to palatal tissue such as indentation of palate

Question 8

mesioversion (MV)

Answer 8

also known as SPEARING CANINES

tooth is in its anatomically correct position in the dental arch BUT is abnormally angled in mesial direction

Question 9

labioversion (LABV)

Answer 9

incisor or canine tooth is abnormally angled in a labial direction

Question 10

distoversion (DV)

Answer 10

tooth that is abnormally angled in a distal direction

Question 11

buccoversion (BV)

Answer 11

tooth that is abnormally angled in the buccal direction

Question 12

All class I malocclusions can be a part of class II and class III. True or False?

Answer 12

True

Question 13

Class II Malocclusion

Answer 13

DISTOCLUSION

Teeth in the maxilla occlude rostral to the mandible

Maxillary prognathism (maxilla is forward) and mandible retrognathism (mandible is caudal)

Referred to as:
-brachygnathism
-overshot jaw
-overbite
-parrot mouth

Question 14

Class II Malocclusions are more commonly to occur in what type of breeds?

Answer 14

Dolichocephalic (narrow skulls and long maxillas = collies)

Question 15

Class III Malocclusion

Answer 15

MESIOCCLUSION

mandibular teeth occlude rostral to maxillary equivalent
maxillary retrognathism (maxilla is caudal) and mandibular prognathism (mandible is forward)

Referred to as:
-prognathism
-underbite
-undershot jaw

Often associated w/ rostral cross bite

Question 16

Class III malocclusion is typical of what breed?

Answer 16

brachycephalics (wide skulls w/ short maxillas)

Question 17

Level bite

Answer 17

end to end bite of incisors

generally a degree of prognathism

Question 18

Wry mouth

Answer 18

nonspecific term that refers to a variety of unilateral occlusal abnormalities

Question 19

Oligodontia

Answer 19

only a few teeth present

Question 20

Anodontia

Answer 20

congenital absence of teeth

Question 21

Hypodontia

Answer 21

one or a few teeth missing

Question 22

polydontia

Answer 22

more teeth than normal
supernumerary

Question 23

abnormal dental interlock

Answer 23

deciduous teeth that errupt in an abnormal pattern

Question 24

what breeds develop caries?

Answer 24

rabbits and chinchillas

Question 25

gingivitis

Answer 25

inflammation of the gingiva caused by plaque

Question 26

periodontitis

Answer 26

inflammation of the supporting structures of the teeth, periodontal ligament, alveolar bone, cementum

Question 27

gemini

Answer 27

two teeth that arise from one enamel origin (two crowns w/ one single root canal)

Question 28

fusion

Answer 28

two tooth buds grow together to form one larger tooth

Question 29

dilaceration

Answer 29

sharp end, curve, or angulation in the root or crown

Question 30

in bisecting angle technique, what causes FORESHORTENING of the tooth?

Answer 30

if the beam is more perpendicular to the film

Question 31

in bisecting angle technique, what causes ELONGATION of the tooth?

Answer 31

if the beam is more perpendicular to the tooth axis

Question 32

for incisors and canine teeth, where should you be standing?

Answer 32

to the patient’s side

Question 33

for premolars and molars, where should you be standing?

Answer 33

in front of the patient

Question 34

in your dental xray machine, what are two variables that are CONSTANT?

Answer 34

kvp, mAs

Question 35

what makes the periodontium?

Answer 35

alveolar bone
cementum
periodontal ligament
gingiva