Brainscape's Knowledge GenomeTM

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


See full index

Paediatrics > Chapter 6: Dental Eruption, Tooth Resorption, Mechanisms > Flashcards

Chapter 6: Dental Eruption, Tooth Resorption, Mechanisms Flashcards

1
Q

Eruption represents?

A

A series of phenomena by which the tooth migrates from its site of formation to its functional position in the oral cavity and lasts the whole tooth life

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

Dental emergence is defined as? And is it the same as eruption?

A

The moment when the tooth appears in the mouth
No

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

The process starts with? But the relatively quick axial movements are due to?

A

Odontogenesis or formation of tooth germs and maturation and calcification
Root development

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

IEE + OEE=

A

HERS

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

What determines the shape and size of the root and influences tooth eruption?

A

HERS

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What happens to the HERS, as the root grows?

A

Gets fragments and disappears

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

If epithelial rests of the HERS remain, its called? And might lead to?

A

Epithelial rests of Malassez, radicular cysts

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

When does the alveolar septa and the development of the PDL start?

A

When the root growth exceeds 1-2mm

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

What happens when the root length reaches 2/3 of its final length?

A

The crown is close to the oral cavity and both epithelia fuse to allow the tooth to apear

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

What allows the tooth to appear without ulcerating the gums?

A

The fusion of both epithelia (oral and dental)

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

Factors involved in dental eruption:

A
  1. Root growth
  2. HERS proliferation
  3. Alveolar bone growth and apposition phenomena at the bottom
  4. Resorption of the alveolar crest and development of the alveolar septa
  5. Force exerted by the vascular tissues around the root
  6. Dentin growth and pulp constriction, and growth of the periodontal membrane by collagen maturation in the ligament
  7. Muscle pressure
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

The stages of tooth eruption are?

A
  1. Pre eruptive stage
  2. Pre functional eruptive stage
  3. Functional eruptive stage
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

The two phases of the pre-eruptive stage are?

A
  1. Movement of the germ to achieve a position to erupt
  2. Movement to erupt
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What happens during the pre eruptive stage?

A
  • crown calcified, beginning of root formation and Intra alveolar migration to the surface
  • combination of mesiodistal and vertical movements will take place
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Movement of the germ to achieve a position to erupt: in what direction does the follicle move at first befe moving up?

A

Laterally, from the innermost part of the maxillary or mandibular bone to the outermost part

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

Movement of the germ to achieve a position to erupt: what kind of growth do the follicle and germ experience?

A

Centrifugal (away from the center), until the formation of the crown is completed and the root begins to develop

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

Movement to erupt: when the root begins to develop the forming tooth begins what kind of movement towards the surface of the gum?

A

Vertical movement

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

Movement to erupt: the distance covered (vertical) is equal to?

A

The growth that the forming root is experiencing

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

When the tooth is in the mouth without making contact with the antagonist, which stage is it in?

A

Pre functional eruptive stage

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

Prefucntional eruptive stage:
- crown is?
- root is?

A
  • crown is calcified
  • root is 2/3 formed
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

The emergence of the crown in the oral cavity is called?

A

Active eruption

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

Displacement of the epithelial attachment simultaneous to active eruption is called?

A

Passive eruption

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Clinical emergence movements within the bone occur until?

A

Its erupts completely and contacts the antagonist in occlusion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Functional eruptive stage: what happens

A

the tooth sets its occlusion with the antagonsit, and the movements that occur will. Last for the lifetime of the tooth, trying to compensate for for tooth wear or abrasion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

Post eruptive movements keep the tooth in occlusion, compensating for?

A
  • the movement of the jaws: a movement towards occlusal occurs to offset the growth of the jaws
  • the occlusal wear
  • the proximal wear
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

The proximal wear:

A
  • Inter proximal wear: offset by several forces that will tend to join the teeth in the mesial and distal sides
  • occlusal force
  • soft tissue pressures
  • contraction of the transeptal ligament
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

When can the vertical eruption resume?

A

At any time of life if contact with the antagonists disappears, due to the tooth loss or imbalance of occlusion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

What happens alongside active eruption in adults?

A

Passive eruption , its not the vertical displacement of the tooth but a progressive retraction of the gingiva and the rest of the structures around the tooth
This makes the tooth crown lengthen with age

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

Theories of eruptive movement: root formation theory states?

A

The tooth erupts because the root is formed—>as the tooth length increases, it must be accommodated by occlusal movements of the crown

30
Q

Theories of eruptive movement: root formation theory counterarguments ?

A
  • there are teeth that erupt without having the root formed
  • there are teeth with the root formed that sometimes dont erupt
31
Q

Theories of eruptive movement: hydrostatic theory states?

A

The existence of a larger pressure system in the tooth results in the eruption

32
Q

Theories of eruptive movement: vascular hypothesis theory states?

A

The blood vessels of follicular apical tissue produce a high pressure in this area responsible for the eruptive movement

33
Q

Theories of eruptive movement: vascular hypothesis theory counterarguments

A
  • removing the pulp in incisors of rodents and found that the eruptive rates of these teeth were not modified
  • it has been seen that even excising apical tissue, tooth eruption still occurs
34
Q

Theories of eruptive movement: bone apposition and resorption around the tooth theory states?

A

Phenomena of apposition and bone resorption around the tooth in the pre eruptive and eruptive phases occur, leading to the eruption of the tooth

35
Q

Theories of eruptive movement: bone apposition and resorption around the tooth theory counterarguments

A

It has been said that the apposition and resorption are a result of the eruption and not the cause

36
Q

Theories of eruptive movement: PDL theory states?

A

Eruptive force is generated by the contractile property of the PDL fibroblasts

37
Q

Theories of eruptive movement: PDL theory counterarguments

A

Other conditions must be met for this contraction to result in tooth movement

38
Q

Shedding of primary teeth happens when?

A

The start of eruption of permanent teeth

Exfoliation of the temporary teeth—> emergence of the permanent tooth (alveolar bone and PDL formation)

39
Q

Two types of cells involved in the shedding of primary teeth?

A

Odontoclasts
Osteoclasts

40
Q

Odontoclasts:

A

Resorption of dental hard tissue (Cement and root dentin)

41
Q

Osteoclasts:

A

Alveolus resorption (apical bone, cervical bone, and epithelial attachment)

42
Q

Temporary teeth complete their root formation ___ years after its emergence in the mouth?

A

1.5 years

43
Q

What is an intermittent process where active resorption processes alternate with other longer rest period where the periodontal insertion of the resorbed zone is restored and on the resorbed areas, cementum is set?

A

Resorption

44
Q

How does ankylosis occur?

A

If apposition processes exceed the resorption processes, ankylosis happens with consequent infra occlusion of the tooth

45
Q

Stages of resorption:

A
  1. Active
  2. Rest
  3. Repair (characterised by the apposition of cellular cement matrix on dentinal resorption lacunae)
46
Q

What happens first cement or dentin resorption?

A

Cement then dentin

47
Q

Teeth resorption mechanism theories: the mechanical theory states that?

A

Permanent germ pressure is responsible for resorption , influencing the differentiation and activation of Odontoclasts

48
Q

Teeth resorption mechanism theories: the mechanical theory counterarguments?

A

It has been seen that there are deciduous teeth with no successor that suffer resorption

49
Q

Teeth resorption mechanism theories: the chemical/retzius theory states that?

A

The resorption is caused by an underlying acid reaction associated with permanent enamel organ germ

50
Q

Teeth resorption mechanism theories: the biological theory states that?

A

There are some cells called cementoclasts responsible for tissue resorption
The permanent tooth germ stimulates the formation of cementoclasts which produces bone resorption first then cement and dentin

51
Q

The 2 resorption centres in temporary molars are?

A
  • interradicular surfaces
  • root apex areas
52
Q

Few complications during the exfoliation process. Possibly low variation in size between the first premolar and the temporary predecessor which allows root resorption and minimises any complications associated with the exfoliation of the first primary molar: refers to the resorption of which temporary tooth?

A

1st lower temporary molar

53
Q

Roots strongly curved and divergent. Crown of the permanent successor small compared to
the greater inter radicular distance, therefore the force applied to the roots might be insufficient for the root resorption process to be uniform. Consequently it is not uncommon to find retained root fragments: refers to the resorption of which temporary tooth?

A

2nd temporary lower and upper molars

54
Q

Possible consequences of the resorption of the 2nd temporary lower and upper molars:

A
  • ectopic eruption of permanent teeth
  • possible source of cystic development
  • space problems for the permanent teeth
55
Q

minimal difference in size between the successor and predecessor. The permanent tooth development begins palatal to its predecessor and with the growth, the tooth is positioned between the divergence of the root, the palatal side is usually not resorbed: refers to the resorption of which temporary tooth?

A

1st temporary upper molar

56
Q

2 resorption centres for temporary incisors and canine resorption:

A
  • middle third of the lingual root surface
  • root apex area
57
Q

The permanent successor will erupt lingual to the temporary ones and the tongue thrusting will displace the temporary teeth labially, causing their exfoliation: refers to which permanent successor?

A

Lower permanent incisors

58
Q

The ? incisors have a more buccal path than lowers: which incisors?

A

Upper

59
Q

The mesiodistal (MD) diameter of its permanent successor is greater, so its correct resorption and eruption will depend on the space available in the arch. A determinant key of space utilisation is a good eruption sequence: refers to the resorption of which primary tooth?

A

Canines

60
Q

The rotations of premolars sometimes occur by

A

uneven resorption of the molars root

61
Q

Causes of uneven molar root resorption:

A
  • A Loss of inter-proximal contact
  • Lack of space
  • Widespread loss of dental arch
  • Permanent tooth impaction
  • Retained primary tooth fragment
62
Q

Normal resorption teething start time: temporary central incisor:
Temporary lateral incisor:
1st temporary molar:
2nd temporary molar:
Temporary canine:

A

-Temporary central incisor: 3-4 years old
-Temporary lateral incisor: 4-5 years old
-1st temporary molar: 5-6 years old
-2nd temporary molar: 6-7 years old
-Temporary canine: 8-9 years old

63
Q

Temporary tooth retention causes:

A
  • Impacted permanent tooth.
  • Ectopic eruption pathway.
  • Supernumerary.
  • Odontogenic tumour.
  • Permanent tooth agenesis.
64
Q

Nolla stages that refer to the pre eruptive stage are?

A

0-6

65
Q

Nolla stages that refer to the pre functional stage are?

A

7-8

66
Q

Nolla stages that refer to the functoinal stage are?

A

9-10

67
Q

2nd upper and lower molar, upper and lower canine exfoliation:

A

10-12 years old

68
Q

1st upper and lower molar exfoliation:

A

9-11 years

69
Q

Upper and lower lateral incisor exfoliation:

A

7-8 years old

70
Q

Upper and lower central incisor exfoliation:

A

6-7 years old

Paediatrics (11 decks)

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