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NBDHE May 2022 > Dental Anatomy > Flashcards

Dental Anatomy Flashcards

1
Q

Primary Eruption - Max Anteriors

A

Central - 8-12mo
Lateral - 9-13mo
Canine - 16-22mo

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2
Q

Primary Eruption - Mand Anteriors

A

Central - 6-10 mo
Lateral - 9-13mo
Canine - 17-23mo

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3
Q

Primary Eruption - Max Posterior

A

1st Molar - 13-19mo

2nd Molar - 25-33mo

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4
Q

Primary Eruption - Mand Posterior

A

1st Molar - 14-18mo

2nd Molar - 23-31mo

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5
Q

Permanent eruption - Max Anteriors

A

Central - 7-8yrs
Lateral - 8-9yrs
Canine - 11-12yrs

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6
Q

Permanent Eruption - Mand Anteriors

A

Central - 6-7yrs
Lateral - 7-8yrs
Canine - 9-10yrs

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7
Q

Permanent Eruption - Max Posterior

A 
1st Premolar - 10-11yrs
2nd Premolar - 10-12yrs
1st Molar - 6-7yrs
2nd Molar - 12-13yrs
3rd Molar - 17-21yrs
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8
Q

Permanent Eruption - Mand Posterior

A 
1st Premolar - 10-12yrs
2nd Premolar - 11-12yrs
1st Molar - 6-7yrs
2nd Molar - 11-13yrs
3rd Molar - 17-21yrs
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9
Q

Primary Eruption Order

A

Central

Laterals

1st Molar

Canine

2nd Molars

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10
Q

Permanent Eruption Order

A

1st Molar

Centrals

Laterals

Canines

1st PM

2nd PM

1st Molar

2nd Molar

3rd Molars

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11
Q

International vs Universal vs Palmar Notations

A
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12
Q

Endogenous Intrinsic Stain

A

Occurs during tooth development

fluorosis - excessive Fluoride consumption
tetracycline - ingestion by mother

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13
Q

Exogenous Intrinsic Stain

A

Occurs after eruption

Pulp necrosis - dark
Pulpitis - pink discolouration

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14
Q

Exogenous Intrinsic Stain

A

After tooth eruption

green: poor OSC, nasmyths membrane
black: iron
yellow/grey/brown: chlorohexadine
grey/green: marijuana
yellow: biofilm

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15
Q

Blacks Caries Classification

A
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16
Q

pH of enamel and cementum

A

enamel - 5.5

cementum - 6.0-6.7

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17
Q

Normal Occlusion

A

MB cusp of max 1st molar fits in buccal groove of mand 1st molar

Normal overbite and overjet

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18
Q

Class 1 Malocclusion

A

MB cusp of max 1st molar fits in buccal groove of mand 1st molar

Crowding, crossbite, etc. is present

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19
Q

Class 2 Occlusion

  • div 1
  • div 2
A

MB cusp of max 1st molar is mesial to buccal groove of mand 1st molar

Div 1: incisors on max protruded

Div 2: incisors on max retruded

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20
Q

Class 3 Occlusion

A

MB cusp of max 1st molar is distal to buccal groove of mand 1st molar

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21
Q

Curve of Spee

A

Upward smile line seen from buccal aspect

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22
Q

Curve of Wilson

A

Upward smile line seen from frontal aspect due to posterior teeth bring higher up

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23
Q

Fossa

A

Depression on tooth

if on lingual termed “developmental pit”

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24
Q

Cingulum

A

Rounded elevation at cervical third of lingual surface

Max anterior - large, well developed
Mand anterior - smooth and round

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25
Q

Max central incisor feature(s)

A

largest crown of all incisors

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26
Q

Mand central incisor feature(s)

A

smallest and most symmetrical of entire dentition

27
Q

Max lateral incisors feature(s)

A
  • most often fails to develop (and 8’s)
  • most affected by microdontia (peg lateral)
  • may present with talon cusp
  • most likely to present develop lingual caries (pronounced fossa, cingulum, ridges)
  • root curves distally, pointed apex
28
Q

Mand lateral incisors feature(s)

A

curved incisor edge; otherwise similar to central

29
Q

Max canine feature(s)

A

longest root in dentition

  • 2 ling fossa, 1 ling ridge
  • crown is narrower, can be shorter than central
30
Q

Mand canine feature(s)

A

smaller and smoother than max

  • can be bifurcated
31
Q

Max 1st premolar feature(s)

A

2 roots - buccal/lingual

  • 2 cusps
  • most pronounced root concavity
32
Q

Mand 1st premolar feature(s)

A

non-functional lingual cusp

  • 1 root
  • 2 cusps
33
Q

Max 2nd premolar feature(s)

A

resembles 1st PM

  • 1 root
  • 2 cusps
34
Q

Mand 2nd premolar feature(s)

A

can have 2 or 3 cusps (2 lingual)

  • y-shaped grooves with central pit on occlusal
35
Q

Max 1st Molar feature(s)

A
  • can have 4-5 cusps (5th cusp termed cusp of carabelli
  • largest root of all molars
  • 3 roots (2 buccal, 1 lingual)
36
Q

Mand 1st molar feature(s)

A

2 roots, 4-5 cusps

  • mesial root can have 2 pulp canals
  • largest tooth in permanent dentition
  • wider m-d than b-l
  • 1st to erupt in permanent dentition
37
Q

Max 2nd molar feature(s)

A
  • 3 roots (2 buccal, 1 lingual)

- 3-4 cusps

38
Q

Mand 2nd molar feature(s)

A
  • 4 cusps

- 2 roots

39
Q

Max 3rd Molar feature(s)

A

usually fused roots

small crown, supplemental grooves

40
Q

Mand 3rd molar feature(s)

A

usually fused roots

  • smallest crown of molars
  • more supplemental grooves
41
Q

Amelogenesis Imperfecta

A

hypoplastic: thin enamel, ameloblasts failed to lay enamel matrix properly (pitting)

  • hypocalcification
  • hypomaturation: normal thickness of enamel but chips easily
  • not due to a systemic disorder; due to ectodermal disturbance
42
Q

Dentinogenesis Imperfecta

A

hereditary opalescent dentin (blue-brown)

  • primary teeth affected more than permanent
  • no pulp; no pulp chambers/root canals on rads
  • mesodermal disturbance
43
Q

Dentin Dysplasia

A

genetic disorder

  • abnormally short roots that exfoliate prematurely
  • total or partial lack of pulp
  • oddly shaped pulp chambers and root canals on rads
44
Q

Anodontia

A

congenital lack of all teeth

45
Q

Hypodontia

A

lack of 1+ teeth congenitally

46
Q

oligodontia

A

6+ teeth missing due to underlying syndrome

  • most commonly 3rd molars and max laterals
47
Q

Supernumerary Teeth

A

extra teeth, often remain unerupted

  • most common: mesiodens (between centrals on max)
  • 2nd common: distomolar (distal of 8’s)
  • associated with many syndromes
48
Q

Natal Teeth

A

Erupt at birth

49
Q

Microdontia

A

Small Teeth

  • associated with hypodontia
  • most common: peg lateral (maxillary) and 8’s
  • associated with down syndrome and pituitary drawfism
50
Q

Macrodontia

A

1+ teeth are larger than normal

  • most common: incisors and canines
  • localized: facial hemihypertrophy/ hemifacial hyperplasia
  • associated with pituitary gigantism and pineal hyperplasia
51
Q

Gemination

A

Single tooth germ attempts to divide

  • shared roots and pulp
  • most common: deciduous mand incisors and permanent max incisors
52
Q

Fusion

A

2 teeth joined by cementum

- most common max 7 & 8’s

53
Q

Enamel Pearl

A

Small enamel projection in furcation of molars

  • radiographically detected
  • Mand bifurcation most common (Man Buys Woman Pearls)
  • can cause periodontal problems - bone loss, plaque retention
54
Q

Dilaceration

A

sharp curve/bend in root

  • most common : mand 8’s, max 5’s, 7’s
55
Q

Dens in Dente

A

tooth grows enamel organ in crown before mineralization

  • most common in max laterals
  • susceptible to caries
56
Q

Taurodontism

A

in multirooted teeth, “bull” teeth

  • enlarged pulp chambers, short roots
  • associated with amelogenesis imperfecta, down syndrome, ectodermal dysplasia
57
Q

Talon Cusp

A

Accessory cusp in cingulum area of permanent incisors

- can interfere with occlusion

58
Q

Dens Evaginatus

A

Accessary enamel cusp on occlusal

  • most common mand premolars
  • pulp horn can extend into cusp
59
Q

Enamel Hypoplasia

A

incomplete development of enamel

  • ameloblast disturbance during enamel matrix formation
  • can be caused by fluorosis
60
Q

Enamel Hypocalcification

A

Disturbance of maturation of enamel matrix

  • chalky white or dark spots
  • susceptible to caries
61
Q

Hypercementosis

A

excessive cementum deposition at apex

  • cementicles: free cementum in PDL
  • mand molars, mand premolars, max 7’s
62
Q

Abfraction

A

mechanical destruction

- wedge-shape lesion at cervical 3rd

63
Q

Abrasion

A

Mechanical Destruction

  • improper brushing, parafunctional habits
  • V-shape notch
64
Q

Ankylosed Teeth

A

Teeth fused to bone

  • deciduous molars
  • extraction necessary
  • appears submerged, has solid sound when percussed

NBDHE May 2022 (12 decks)

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