Dental Anomalies Flashcards Preview

Dental Anatomy > Dental Anomalies > Flashcards

Flashcards in Dental Anomalies Deck (46)
Loading flashcards...
1

Classifications of Abnormalities

1. Abnormal Number
2. Abnormal Size
3. Abnormal Shape
4. Abnormal Calcification and Apposition

2

Developmental Stages

1. Dental Lamina and Bud Stage
2. Cap Stage
3. Bell Stage
4. Root Development

3

Dental Lamina and Bud Stage

- Epithelial thickening
- Dental lamina
- Enamel organ

4

Cap Stage

Inner and Outer Enamel Epithelium

5

Bell Stage

- Tooth Form Identified
- DEJ
- Enamel and Dentin Formation

6

Root Development

- CEJ formation
- Dentin and Cementum Formation

7

Physiological Processes of Development

1. Initiation
2. Proliferation
3. Histodifferentiation
4. Morphodifferentiation
5. Apposition

8

Initiation

- Dental Lamina and Bud Stage
- Existence of the teeth

9

Proliferation

- Bud, Cap, and Bell Stages
- General shape and size

10

Histodifferentiation

- Late Cap and Bell Stages
- Dentin and Enamel forming cells

11

Morphodifferentiation

- Bud, Cap, and Bell Stages
- Shape and size of teeth affected
- Dentin and enamel NOT affected

12

Apposition

- Bell Stage and Root Development
- Enamel and Dentin Formation

13

Intrinsic vs. Extrinsic Causes of Abnormalities

- Intrinsic: Hereditary and Metabolic Disturbances
- Extrinsic: Physical or Chemical Trauma, Nutrition, Environment

14

Congenital Abnormalities

Caused by Extrinsic or Intrinsic Factors and occurring at or before birth

15

Anodontia

- Complete and Partial
- 3rd molars, maxillary lateral incisors, and mandibular 2nd premolars

16

Supernumerary/Accessory Teeth

- Extra tooth buds
- Mesiodens: Maxillary midline
- Distodens: Posterior to 3rd molar

17

Abnormal Size of Teeth

Morphodifferentiation Stage

18

Abnormal Number of Teeth

Initiation Stage

19

Macrodontia (True and False)

- True: Gigantism
- False: Incisors, Canines, and Mandibular 3rd Molars

20

Microdontia (True and False)

- True: Dwarfism
- False: Maxillary lateral incisors, Maxillary 3rd molars

21

Abnormal Shape of Teeth

Morphodifferentiation and Appositional Stages

22

Taurodontism

- Crown greater proportion of tooth, CEJ lacks constriction
- Premolars and Molars

23

Dilaceration

- Nonlinear Crown AND Root
- Injury or Pressure

24

Flexion

- Nonlinear Root ONLY
- Injury or Pressure

25

Gemination and "Twinning"

- Incomplete Splitting of Tooth Bud
- Wide Mesio-distally
- Incisors
- "Twinning": Complete separation of tooth buds

26

Dwarfed Roots

- Small roots and curved crowns
- Maxillary Incisors

27

Hypercementosis

- Excess Cementum
- Trauma, pulp inflammation, metabolic causes

28

Accessory Cusps

Molars and Incisors (Talon Cusps)

29

Extra Roots

- 3rd Molars, Maxillary 1st Premolars, and Mandibular Anterior Teeth
- Trauma, Pressure, and Metabolic Causes

30

Fusion

- Union of Dentin and Enamel of Crown ONLY of 2 tooth buds with separate pulp chambers
- Anterior teeth