Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Dental Anatomy and Occlusion > Unit 11 > Flashcards

Unit 11 Flashcards

1
Q

Active Eruption

A

Toot entry to oral cavity to contact w/ antagonist

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Passive Eruption

A

Continuing process of adaptation of the tooth.

No antagonist = supraerupt

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Nasmyth’s Membrane

A

When tooth erupts, keratinous membrane-like enamel cuticle surrounds the crown
-abbraded away

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Time lag btwn eruption and root ocompletion for deciduous teeth is….?

A

1 year

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Position of developing permanent teeth

A
  1. Perm teeth lingual to succedaneous teeth
  2. Premolars are in the root furcations of molars
  3. Perm molars are not succedaneous teeth - buds develop from dental lamina in the alv process, distal to deciduous dentition
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Growth causes extra space between teeth (anterior segment of arches), this is known as….

A

diastemas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is the first permanent tooth to emerge, and at what age?

A

Mandibular First Molar, age 6

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What are the cornerstones of occlusion in the permanent dentition

A

4 First molars
Serve as guide for eruption
Loosing deciduous teeth prematurely may cause a tilt/drift mesially - reducing space for canines and premolars

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What does changing the space available in the mouth possibly lead to..

A

Changing first molars relationship w/ antagonist, possible impaction, crowding, or malocclusion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Process by which root of tooth is “melted away”

A

Resorption

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Where does resorption begin

A

Apex then towards cervical, begins at least 1 year prior to exfoliation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Exfoliation

A

When root structure is absorbed, crown becomes loosened and is lost

  • occurs symmetrically (L/R)
  • Mandib teeth precede the same max teeth in exfoliation - exception = 2nd molars (all are lost simultaneously)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Ankylosis

A

When eruption ceases, tooth becomes fixed, and resorption cannot progress naturally

  • when root structure fuses w/ bone
  • remove as soon as its diagnosed
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Stages of tooth development (alternative)

A 
Initiation
Proliferation
Histodifferentiation
Morphodifferentiation
Apposition - laying enamel and dentin
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Initiation

A

Includes dental lamina and bud stages

Affects presence/absence of tooth buds

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Proliferation

A

During bud/ca/bell sages

Influences size and proportions of tooth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Histodiff

A

Advanced cap stage through bell stage

Formation of potential enamel and dentin forming cells

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Morphodiff

A

Shape and size of tooth, takes place during bud/cap/bell stages
No effect on enamel and dentin forming process

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Which dentition is more prone to abnormaliites?

A

Permanent

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Abnormal number of teeth

A

Anodontia

Supernumerary Teeth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Anodontia

A

“complete lack of teeth” - missing any teeth
Should be hypodontia
Total or Partial Anodontia

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Partial Anodontia

A 
Hereditary Factors
Dental lamina may be below threshold
~5%
Permanent Max and Mandib 3rd molars > max lat incisor > man 2nd premol
In deciduous = man central incisor
23
Q

Supernumerary

A 
Extra tooth buds diff from dental lam = Genetic
Both decid and perm teeth
1. Mesiodens - btwn max central incisors
2. Distodens - 3rd molar region
~1-2%
24
Q

Abnormal Size of Teeth

A

Macrodontia

Microdontia

25
Q

Macrodontia

A

(Gigantism)

  1. True macrodontia - pituitary gigantism - all teeth
  2. False Macrodontia - individual teeth - incisors, canines, man 3rd molars
26
Q

Microdontia

A

(Dwarfism)

  1. True Microdontia - pituitary dwarfs - all teeth
  2. Individual teeth - max lat incisor (PEG LATERALS), and max 3rd molars
27
Q

Abnormal Shape of Teeth

A
  • during morphodiff and appositional stages*
    1. Taurodontism
    2. Dilaceration
    3. Flexion
    4. Germination
    5. Fusion
    6. Concrescence
    7. Segmented Root
    8. Dwarfed roots
    9. Hypercementosis
    10. Accessory Cusps and Roots
    11. Missing Cusps
    12. Enamel Pearls
    13. Hutchinson’s Teeth
    14. Dens in dente
    15. Odontoma
28
Q

Taurodontism

A 
Premolars and Molars
Crown occupies greater proportion of the tooth bulk than normal
-No CEJ constriction
-Furcation  - apical half of tooth
- Hereditary - w/ other syndromes
29
Q

Dilaceration

A

Distortion of the root and crown

- Trauma, injury, pressure

30
Q

Flexion

A

Distortion of root portion only

Sharp Bends

31
Q

Germination

A

Incomplete splitting of single tooth germ

Wide MD, usually incisor (twinning)

32
Q

Fusion

A

Union of two adjacent tooth buds

  • Enamel & dentin
  • 2 identifiable pulp cav’s
  • only the crowns
  • ANT teeth
  • Deciduous
33
Q

Concrescence

A

Unions of root structure through cementum only

  • Permanent molars (max)
  • After eruption, never involves dentin or enamel
34
Q

Segmented root

A

disturbance during root development, seperated root segment

-Break in hertwig’s sheath?

35
Q

Dwarfed Roots

A

Root = dwarfed
Crowns = abnormal contour –> great incisocerv convexity on labial surace
- Max Central (bilateral)
- Hereditary?

36
Q

Hypercementosis

A

XS cementum

  • Perm Molars
  • Trauma, metabolic disturb, CHRNOIC INFLAM of PULP
37
Q

Accessory Cusps

A

3rd Molars or if anterior - talon cusp (phillips screwdriver)

38
Q

Accessory Roots

A

Trauma, pressure, metabolic disease

3rd Molars

39
Q

Missing Cusps

A

Usually dimunitive

40
Q

Enamel Pearls

A

aka Enamelomas
B/L of Man Molars
M/D on Max Molars
~2%

41
Q

Hutchinson’s teeth

A

Hypoplastic Defects (enamel dysplasia)
Prenatal Syphilis
Screwdriver shape w/ deep notch, mulberry appearance w/ gnarled enamel

42
Q

Dens in Dente

A

Small tooth w/in tooth
Perm Max Lat Incisor
Lingual Pit–> leads to enamel and dentin in the pulp caivty

43
Q

Odontoma

A

Benign Tumor
Complex Odontoma - no dental form - calcified dental tissues
Compound Odontoma - arranged in shape that resembles tooth

44
Q

Abnormal Calcification and Apposition

A

Enamel Dysplasia

Dentinal Dysplasia

45
Q

Enamel Dysplasia

A

Catchall label - all enamel developmental abnormalities

  1. Enamel Hypoplasia - during enamel matrix formation
  2. Enamel hypocalcification - time of disturbance is later than for hypoplasia (during enamel matrix maturation)
46
Q

Types of Enamel Dysplsia

A

Amelogenesis Imperfeca
Dental Fluorsis
Focal Hypomaturation
Turner’s Teeth

47
Q

Dentinal Dysplasia

A

Tetracycline Staining

Dentinogenesis Imperfecta

48
Q

Amelogenesis Imperfecta

A
  • Hereditary
  • Range: almost no enamel, to depositied to immature enamel
  • rampant caries, excessive attrition
  • rough surface
49
Q

Dental Flurosis

A

XS fluoride

  • Hypocalcification problem
  • Chalky white bands, pigmented w/ brown or yellow
  • resistant to caries
50
Q

Focal Hypomaturation

A
  • similar to enamel dysplasias
  • chalky white and opaque area (circular)
  • susceptible to caries
51
Q

Turner’s Teeth

A

Individual Teeth

  • injury to dev perm tooth follicle
  • assymetrical
52
Q

Tetracycline Staining

A

Admin of wide-spec antibiotic tetracyclines to mother during prenatal periods or to an infant

  • intrinsic color change of dentin
  • primary and perm teeth
  • yellowing cast, may be gray or purple
53
Q

Dentinogenesis Imperfecta

A

Genetic disturbance of dentin formation

  • bluish-brown crown = Opalescent dentin
  • normal enamel, but fractures easily

Dental Anatomy and Occlusion (4 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions