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Boards - Dental Anatomy Facts from videos > Dental Anatomy Facts Part 3 > Flashcards

Dental Anatomy Facts Part 3 Flashcards

1
Q

When the mandible moves from CO to edge to edge, what do the condyles do

A

Condyles move forward and downward

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2
Q

when the mandible moves from CO to edge to edge, what does the non-working condyle do

A

moves downward, forward, and medial

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3
Q

What plays the greatest role in discluding the posterior teeth in latero-protrusive movements

A

Anterior guidance

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4
Q

Teeth are in contact in intercuspal position during non masticatory swallowing or during masticatory swallowing

A

Non masticatory swallowing

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5
Q

What almost exclusively determines intercuspal position

A

Tooth contact

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6
Q

What is a tooth guided position and what is a ligament guided position

A

Tooth guided - Centric occlusion or intercuspal position

Ligament guided - Centric relation

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7
Q

In Posselt’s envelope, what is the most superior point

A

Maximum intercuspal position = intercuspal position = CO

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8
Q

Bennet Movement

A

Side shift of the mandible toward the working condyle, the side it’s moving to

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9
Q

When does Bennet movement occur

A

During the earliest stage of lateral movement

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10
Q

What is postural position

A

Physiological rest position

About 2mm lower than CO

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11
Q

Is Postral position a border position

A

no

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12
Q

Mandibular postral position determined almost exclusively by what

A

mandibular musculature

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13
Q

If you move from postral position to CO, use what muscle

A

Use anterior fibers of temporalis

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14
Q

Curve of Spee

A

the Anterior-posterior curvature of the occlusal surfaces as seen in a facial/buccal view
- think weeee, sliding down the teeth

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15
Q

Curve of Wilson

A

Curved bridge from left to right side inside the mouth

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16
Q

Overjet

A

Horizontal overlap

  • Usual overjet is 2-4 mm
  • think jet on the horizon
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17
Q

Overbite

A

Vertical overbite

-think, you bite up and down

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18
Q

The main component of enamel

A

inorganic matter

not collagen

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19
Q

Direction of enamel rods in permanent teeth in cervical third

A

Gingival direction or not towards the incisal/occlusal

rods in cervical third of deciduous teeth run incisal-cervically

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20
Q

Perikymata

A

Result from the normal enamel apposition - seen on outside surface
-Manifestation of striae of Retzius on enamel surface

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21
Q

Striae of Retzius

A

Developmental disturbances inside tooth in the enamel

-run obliquely from DEJ to enamel surface

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22
Q

For multi-rooted teeth, where does dentin most rapidly form

A

at the floor and roof of pulp chamber

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23
Q

Caries stimulates production of what

A

tertiary dentin

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24
Q

Percentage of dentin that is organic

A

20-30%

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25
Q

Primary function of dental pulp is

A

to form dentin

-not to nourish or provide sensation

26
Q

What is the dentin and pulp formed from

A

Dental Papilla

-think D.P. - dental papilla and dentin pulp

27
Q

Dentin that is most highly mineralized is

A

Intra or peritubular dentin

  • Peritubular - right around the odontoblastic process
  • INTERtubular dentin is in between two processes
28
Q

The DEJ occurs at what two structures during development

A

dental papilla and inner enamel epithelium

-DP cells in contact with IEE = odontoblasts

29
Q

Softest dental tissue

A

cementum

30
Q

2 types of cementum, where are they

A

Acellular - coronal 2/3

-Cellular - apical 1/3, think that the cells are down where the blood supply is coming from

31
Q

When viewed from the occlusal, the arrangement of the teeth are what shape,
however, the 4 or 5 posterior teeth are aligned in what shape

A

all teeth in parabolic shape

posterior teeth aligned in straight line

32
Q

All teeth develop from how many lobes

What are the exceptions

A

All teeth develop from 4 lobes

  • Except permanent first molars - 5 lobes
  • And mandibular 2nd premolar 3 cusp type - 5 lobes
33
Q

Marginal ridges of mand first premolar

A

mesial marginal ridge more cervical than the distal

34
Q

All teeth have distal and mesial marginal ridges - true or false

A

true

35
Q

What separates cusp ridges from marginal ridges

A

developmental grooves

36
Q

Union of a facial and lingual triangular ridge

A

Transverse ridge

37
Q

How many teeth in permanent dentition normally have a cingulum, which are they

A

All 12 anterior teeth

38
Q

What percent of the total F-L dimension is made up by the occlusal table of posterior teeth

A

55-65%

39
Q

What makes up the periodontium

A

Gingiva, PDL, Cementum, Alveolar bone (junctional epithelium is often included)
-epithelial attachment - junctional epithelium

40
Q

How wide is PDL normally and with age

A

PDL is 0.2 mm wide

-Old age decreases to 0.1 due to deposition of cementum and bone

41
Q

Attachments of PDL fibers

A

tooth (cementum) to dental alveolar bone

42
Q

Attachments of gingival fibers

A

tooth (cementum) to gingiva

43
Q

What is the predominant connective tissue for PDL fibers

A

Type 1 collagen

44
Q

What fibers provide the major support for a tooth during function

A

Oblique fibers

45
Q

Which fiber reduces the likelihood of forceful impaction into alveolus

A

Oblique fibers

46
Q

Group of fibers most likely found in middle third of root

A

Oblique fibers

47
Q

Most prevalent type of PDL fiber

A

Oblique fibers

48
Q

Transseptal fibers are PDL or gingival fibers

A

Gingival fibers

49
Q

Attachments of transseptal fibers

A

Tooth to tooth

50
Q

About how much of permanent root is formed when tooth erupts

A

50%

51
Q

When is the apex of a tooth fully formed after it erupts

A

about 2-3 years

52
Q

Function of the pulp

A

form dentin - primary function

  • supply nutrients to dentin
  • transmit sensory stimuli
53
Q

Which teeth have facial heights of contour in cervical third

A

All except mandibular molars

54
Q

Lingual heights of contour found where

A

Anterior teeth - cervical third

-Posterior teeth - middle third except MD 2nd premolar is in occlusal third

55
Q

Location of lingual height of contour on mand 2nd premolar

A

occlusal third

56
Q

Where is the greatest depth of curvature of the cervical line of permanent teeth

A

Mesial aspect

57
Q

Where does the CEJ dip deeper

A

Ant teeth than post
Max than mand
Mesial than distal
Greatest on mesial of max central incisor

Think max central incisor as model for all of these

58
Q

Supernumerary teeth commonly where

A

between maxillary centrals

or as a 4th molar sometimes

59
Q

Concrescence

A

when cementum of two teeth join together

60
Q

Oligodontia

A

presence of fewer than normal teeth - 6?

61
Q

Which aspect of mand central opposes the which part of max central

A

distoincisal aspect of mand central opposes lingual fossa of max central

62
Q

Exceptions to picket fence drawing

A

Lingual cusps of max premolars contact the distal fossa of respective mand premolars because of mesial slant of lingual cusp
(max 2nd premolar lingual cusp contacts distal fossa of mand 2nd premolar)

In a cusp to fossa contacting relationship in ICP, max first premolar is most likely to articulate with mand first premolar - this is due to lingual inclination of max first premolar. Mand second premolar is not involved in cusp to fossa manner

Boards - Dental Anatomy Facts from videos (7 decks)

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