Roseman 2012 Dental Anatomy And Occlusion

Front 1

What does late mesial shift mean?

Back 1

mesial drift specifically of the permanent 1st molars into the leeway space.

Front 2

What does "centric" mean with regard to occlusion?

Back 2

a supporting cusp that stops you from biting down further

Front 3

Which of the following BEST describes a centric holding cusp of a mandibular left second molar?

a.It is the distofacial cusp and occludes in the embrasure between maxillary first and second molars.
b.It is the distofacial cusp and occludes in the central fossa of a maxillary second molar.
c.It is the distolingual cusp and occludes in the embrasure between maxillary first and second molars.
d.It is the distolingual cusp and occludes in the central fossa of a maxillary second molar.

Back 3

b.It is the distofacial cusp and occludes in the central fossa of a maxillary second molar.

Front 4

What's the difference between occlusion and articulation?

Back 4

occlusion is the static relationship of teeth
articulation is the dynamic relationship of teeth

Front 5

What does it mean that babies are obligate nasal breathers?

Back 5

They position jaw forward to lower tongue to breath through nose.

Front 6

What does it mean that babies have reflex suckling?

Back 6

They position tongue on lower lip to take milk on tongue back to the throat.

Front 7

What accounts for the creation of interdental space on the mand. and
lengthening of the jaw?

Back 7

Permanent teeth erupt lingually to primary teeth.

Front 8

What are the opposing contacts of the primary max. central incisor?

Back 8

mand. Central incisor, mesial 1/3 of lateral incisor

Front 9

What are the opposing contacts of the primary max. lateral incisor?

Back 9

distal 2/3 mand. lateral incisor, part of canine mesial to cusp tip

Front 10

What are the opposing contacts of the primary max. canine?

Back 10

part of mand. canine distal to cusp tip, mesial part of MB cusp of mand. 1st molar

Front 11

What are the opposing contacts of the primary max. 1st molar?

Back 11

distal 2/3 of mand. 1st molar, MMR & MTF of 2nd molar

Front 12

What are the opposing contacts of the primary max. 2nd molar?

Back 12

all of mand. 2nd molar except its MMR & MTF

Front 13

What are the opposing contacts of the primary mand. central incisor?

Back 13

mesial 2/3 of max. central incisor

Front 14

What are the opposing contacts of the primary mand. lateral incisor?

Back 14

distal 1/3 of max. central incisor
mesial part of max. lateral incisor

Front 15

What are the opposing contacts of the primary mand. canine?

Back 15

distal part of max. lateral incisor
mesial part of canine

Front 16

What are the opposing contacts of the primary mand. 1st molar?

Back 16

distal part of max. canine
mesial 2/3 of max. 1st molar

Front 17

What are the opposing contacts of the primary mand. 2nd molar?

Back 17

distal 1/3 of max. 1st molar
max. 2nd molar

Front 18

Which of the primary teeth have only one opposing tooth?

Back 18

Max. 2nd molar and mand. central.

Front 19

"Step Relationships" refer to what tooth?

Back 19

primary mand. 2nd molar

Front 20

Where are the primate spaces found?

Back 20

mesial to the canines in the maxilla
distal to the canines in the mandible

Front 21

What changes occur to the maxilla during facial growth?

Back 21

bone is added at the sutures and tuberosity posteriorly
maxilla is translated downward and forward
bone is remodeled away from anterior surfaces (except for anterior nasal spine)

Front 22

Who came up with the Functional Matrix Theory, and what does that theory state?

Back 22

Melvin Moss

Facial bones grow in response to function not genes.
Determinant of growth is in soft tissues.

Front 23

Which arch is the diagnostic arch when looking at primary dentition to predict crowding?

Back 23

mandibular

Front 24

What is incisal liability?

Back 24

transient crowding in mandibular permanent incisors due to their being larger mesiodistally than their deciduous counterparts

Front 25

What is the difference in m-d dimension in the primary incisors vs. permanent incisors?

Back 25

1.6 mm

Front 26

By what age is arch form and width established?

Back 26

9 months

Front 27

Arch width is basically established by 9 months of age, but a change in arch widths comes later in life. When does this occur and by how much?

Back 27

when the permanent canines erupt

~ 2mm increase in width (boys>girls, max.>mand.)

Front 28

Who is Edward H. Angle?

Back 28

The father of modern orthodontics
Instructor of Prosthodontics
Founder of the Angle Schools of Orthodontia
Responsible for the permanent molar relationship classifications

Front 29

How much Leeway space is there in the mand. arch?

Back 29

5mm

Front 30

What can Leeway Space be used for?

Back 30

mesial movement of the molars
alignment of mand. incisors (incisal liability)

Front 31

From where to where is arch length/depth measured?

Back 31

from the mesial surface of the permanent 1st molars to a point between the central incisors

Front 32

What is the definition of arch circumference and what are its values for the mand. and max. arches?

Back 32

the sum of the M-D diameters of the teeth of an arch

mand: 126mm
max: 128mm

Front 33

What permanent molar relationships can distal step lead to?

Back 33

class II and end-on-end

Front 34

What permanent molar relationships can flush terminal plane lead to?

Back 34

end-on-end and class I

Front 35

What permanent molar relationships can mesial step lead to?

Back 35

class I and class III