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NBDHE May 2022 > Dental Anatomy > Flashcards

Dental Anatomy Flashcards

(64 cards)

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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
Max central incisor feature(s)
largest crown of all incisors
26
Mand central incisor feature(s)
smallest and most symmetrical of entire dentition
27
Max lateral incisors feature(s)
- 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
Mand lateral incisors feature(s)
curved incisor edge; otherwise similar to central
29
Max canine feature(s)
longest root in dentition - 2 ling fossa, 1 ling ridge - crown is narrower, can be shorter than central
30
Mand canine feature(s)
smaller and smoother than max - can be bifurcated
31
Max 1st premolar feature(s)
2 roots - buccal/lingual - 2 cusps - most pronounced root concavity
32
Mand 1st premolar feature(s)
non-functional lingual cusp - 1 root - 2 cusps
33
Max 2nd premolar feature(s)
resembles 1st PM - 1 root - 2 cusps
34
Mand 2nd premolar feature(s)
can have 2 or 3 cusps (2 lingual) - y-shaped grooves with central pit on occlusal
35
Max 1st Molar feature(s)
- can have 4-5 cusps (5th cusp termed cusp of carabelli - largest root of all molars - 3 roots (2 buccal, 1 lingual)
36
Mand 1st molar feature(s)
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
Max 2nd molar feature(s)
- 3 roots (2 buccal, 1 lingual) | - 3-4 cusps
38
Mand 2nd molar feature(s)
- 4 cusps | - 2 roots
39
Max 3rd Molar feature(s)
usually fused roots small crown, supplemental grooves
40
Mand 3rd molar feature(s)
usually fused roots - smallest crown of molars - more supplemental grooves
41
Amelogenesis Imperfecta
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
Dentinogenesis Imperfecta
hereditary opalescent dentin (blue-brown) - primary teeth affected more than permanent - no pulp; no pulp chambers/root canals on rads - mesodermal disturbance
43
Dentin Dysplasia
genetic disorder - abnormally short roots that exfoliate prematurely - total or partial lack of pulp - oddly shaped pulp chambers and root canals on rads
44
Anodontia
congenital lack of all teeth
45
Hypodontia
lack of 1+ teeth congenitally
46
oligodontia
6+ teeth missing due to underlying syndrome - most commonly 3rd molars and max laterals
47
Supernumerary Teeth
extra teeth, often remain unerupted - most common: mesiodens (between centrals on max) - 2nd common: distomolar (distal of 8's) - associated with many syndromes
48
Natal Teeth
Erupt at birth
49
Microdontia
Small Teeth - associated with hypodontia - most common: peg lateral (maxillary) and 8's - associated with down syndrome and pituitary drawfism
50
Macrodontia
1+ teeth are larger than normal - most common: incisors and canines - localized: facial hemihypertrophy/ hemifacial hyperplasia - associated with pituitary gigantism and pineal hyperplasia
51
Gemination
Single tooth germ attempts to divide - shared roots and pulp - most common: deciduous mand incisors and permanent max incisors
52
Fusion
2 teeth joined by cementum | - most common max 7 & 8's
53
Enamel Pearl
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
Dilaceration
sharp curve/bend in root - most common : mand 8's, max 5's, 7's
55
Dens in Dente
tooth grows enamel organ in crown before mineralization - most common in max laterals - susceptible to caries
56
Taurodontism
in multirooted teeth, "bull" teeth - enlarged pulp chambers, short roots - associated with amelogenesis imperfecta, down syndrome, ectodermal dysplasia
57
Talon Cusp
Accessory cusp in cingulum area of permanent incisors | - can interfere with occlusion
58
Dens Evaginatus
Accessary enamel cusp on occlusal - most common mand premolars - pulp horn can extend into cusp
59
Enamel Hypoplasia
incomplete development of enamel - ameloblast disturbance during enamel matrix formation - can be caused by fluorosis
60
Enamel Hypocalcification
Disturbance of maturation of enamel matrix - chalky white or dark spots - susceptible to caries
61
Hypercementosis
excessive cementum deposition at apex - cementicles: free cementum in PDL - mand molars, mand premolars, max 7's
62
Abfraction
mechanical destruction | - wedge-shape lesion at cervical 3rd
63
Abrasion
Mechanical Destruction - improper brushing, parafunctional habits - V-shape notch
64
Ankylosed Teeth
Teeth fused to bone - deciduous molars - extraction necessary - appears submerged, has solid sound when percussed

NBDHE May 2022 (12 decks)

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