|
No.
|
Question
|
Answer
|
|
1
|
What is eruption?
|
The movement of the tooth
from its place of formation to its place of function in oral cavity |
|
2
|
Physiologic tooth movement
includes |
Pre eruptive tooth
movement; Post eruptive tooth movement; Eruptive tooth movement. But not circumeruptive movements |
|
3
|
The initial crowding in
developing teeth in infant jaw’s anterior segment is relieved by the |
Growth in length of jaws
|
|
4
|
The permanent incisors
tooth germ first develop _______ to the deciduous tooth germ |
Lingual
|
|
5
|
The permanent incisor and
deciduous tooth germ develop in a |
Same bony crypt
|
|
6
|
The permanent incisor tooth
germ get their own bony crypt |
When their predecessor deciduous
teeth erupt |
|
7
|
Permanent premolar begin
their development |
Lingual to deciduous molar
|
|
8
|
The upper permanent molars
develop in the maxillary tuberosity initially have their occlusal surfaces facing |
Distally
|
|
9
|
The mandibular permanent
molars develop with their occlusal surfaces inclined |
Mesially
|
|
10
|
The principal direction of
tooth movement in eruptive phase are |
Occlusal or axial
|
|
11
|
The principle post eruptive
movement (s) that maintain the position of erupted teeth with growing jaws is |
Axial
|
|
12
|
The tooth movement that
compensates for occlusal & proximal wear? |
Post eruptive tooth
movement |
|
13
|
The principle post eruptive
movement (s) that compensates for occlusal & proximal wear is (are) |
Axial and mesial migration
|
|
14
|
The positioning of the
developing tooth germ is achieved in pre-eruptive phase is by |
Bodily movement and
eccentric growth |
|
15
|
The periodontal ligament
formation is coincident with the onset of |
Eruptive tooth movement
|
|
16
|
The histological entities
in periodontal ligament that accounts for eruptive movements? |
Zona adherens between
fibroblasts; Rapid remodeling of fibers; Presence of fibronexus |
|
17
|
What is Fibronexus
|
The morphological
relationship between microfilaments of fibroblasts, cell membrane, extracellular filaments and fibronectin. |
|
18
|
The dentogingival junction
is formed during the |
Eruptive tooth movement
|
|
19
|
The reason (s) for absence
of hemorrhage during eruption of teeth is that |
Reduced enamel epithelium
and oral epithelium fuse and degenerate; Epithelium is avascular ; Loss of intervening connective tissue between reduced enamel and oral epithelium |
|
20
|
Rapid eruptive movement is
observed till the tooth |
Reaches occlusal plane and
meets its antagonist |
|
21
|
The small connective tissue
filled canal lying apical to the successional tooth germs is referred to as |
Gubernacular canal
|
|
22
|
The gubernacular cord
contains remnants of |
Dental lamina
|
|
23
|
The tooth makes movements
primarily to accommodate the growth of the jaws in |
Post eruptive tooth
movement |
|
24
|
Post eruptive tooth
movement occurs most actively between the ages of |
14- 18 years
|
|
25
|
Post eruptive tooth
movement is associated with |
Condylar growth
|
|
26
|
What does bone remodeling
theory of tooth eruption? |
The theory that states that
the selective deposition and Resorption of bone brings eruption is the |
|
27
|
What is root growth theory?
|
The theory that proposes
that proliferating root impinges on a fixed case thus converting the apically directed force into occlusal movement. |
|
28
|
The theory that supposes
that the cells and fibers of ligament pull teeth in to occlusion is |
Ligament traction theory
|
|
29
|
Cushion hammock ligament is
associated with |
Root growth theory
|
|
30
|
Axial tooth movement during
compensation of occlusal wear does not require |
Bone remodeling
|
|
31
|
When the jaws are clenched
bringing teeth into contact, force is generated in a |
Mesial direction
|
|
32
|
The mesial drift of teeth
is achieved by the |
Contraction of the
transeptal fibers |
|
33
|
Minor progressive occlusal
wear can be treated by proper |
Selective grinding
|
|
34
|
The deciduous maxillary
canine erupts by |
18 months of age
|
|
35
|
The deciduous mandibular
lateral incisor erupts by |
7 months of age
|
|
36
|
Permanent maxillary canine
erupt by |
11 -12 years
|
|
37
|
Permanent maxillary second premolar erupts
by |
10-12 years
|
|
38
|
Permanent mandibular second
premolar erupts by |
11 -12 years
|
|
39
|
Which phase of tooth
movement has an intraosseous & extraosseous component? |
Eruptive tooth movement
|
|
40
|
The periodontal ligament
develops only after |
Root formation has been
initiated |
|
41
|
The property of
contractility is especially well developed in |
Periodontal ligament
fibroblasts |
|
42
|
The rate of eruption of a
tooth during the intraosseous phase averages |
1to 10 micrometers/ day. In
the extraosseous phase rate of eruption is estimated to be 75 micrometer per day. |
|
43
|
A sustained muscular force
sufficient to move a tooth is |
4-5 gram
|
|
44
|
What structure(s) is (are)
necessary to permit the bone remodeling that occurs with tooth movement |
Dental follicle
|
Prof. Rooban Thavarajah
Oral and Maxillofacial Pathologist
List