(E1) 6 - Eruptive Movements Part 1 Flashcards
Exam 1 - BARRITT
All eruptive movements begin during _______ and continue throughout __________
- tooth development
- functional tooth occlusion
Positional changes in the tooth due to movement facilitate ________ or
allow the tooth to maintain functional occlusion
eruption
___________ controls eruption
Reciprocal signaling
What are the 3 phases of eruptive movements?
Image of Eruptive Movements
Pre-Eruptive Movements: Time, Function, Purpose, Outcome
What are the two stages of pre-functional movements?
- intraosseous
- supraosseous
Eruptive, Pre-functional Movements: Time, Function, Purpose
Post-Eruptive Movements: Time, Purpose, Position
What is the function of pre-eruptive movements?
Where do pre-eruptive movements occur?
within bony crypts that surround growing tooth germ crown
Hard tissues of the tooth recognized during _______ stage : enamel / primary coronal dentin
pre-eruptive
Pre-Eruptive Movements: What are the types of movements occurring?
Describe what is happening during the different forms of Jaw Development
Describe the movement of anterior permanent teeth
Describe the movement of posterior permanent teeth
All eruptive movements are ______
pre-functional
Rate of movement between eruptive stages
What is required to establish an eruption pathway?
What is required for penetration of a tooth through oral mucosa/emergence into oral cavity?
Fusion of REE to Oral Epithelium
What is required for differentiation/remodeling of alveolar bone and PDL?
Mechanism of Action for the creation of an eruption pathway
What is the outcome as osteoclasts are stimulated to create an eruptive pathway?
_____ continues as the tooth moves axially.
- Root Elongation
What is occurring during clinical eruption?
What is occurring during active eruption?
What does clinical eruption mean?
Outcomes of Clinical Eruption
What is the Junctional Epithelium and what is its function?
What is the DGJ?
Dentogingival Junction - the junction between the tooth surface and future gingiva
What is active eruption?
Mechanism of Action for Active Eruption
What are the outcomes of Active Eruption?
Define Clinical Crown
the exposed crown extending from the cusp
tip to the area of the dentogingival (JE) attachment.
Define Anatomical Crown
refers to the entire crown, extending
from the cusp tip to the cementoenamel junction.
Define Dentogingival Junction
is the point where the free gingival
margin, sulcular epithelium and junctional epithelium meet
__________ refers to continued
exposure of anatomical crown due to an
apical shift of gingiva and Junctional
epithelium (no tooth movement)
Passive eruption
_________________ due to periodontal
disease/ inflammation will expose
more cementum as JE moves below
CEJ due to loss of attachment
epithelium:
Gingival recession
What does signaling lead to in the coronal region?
signaling leads to bone resorption→eruption path
What does signaling lead to in the apical region?
signaling leads to bone deposition and cellular
differentiation of root structures→ maintain jaw height
The stellate reticulum cells of EO/REE secrete______ binds to receptor ________ on Dental Follicle (DF) cells
- PTHrP
- PTH1R
Impact of PTHrP binding to PTH1R on DF:
________ occurs in the coronal region of the developing tooth to create eruption pathway → necessary for intraosseous eruptive phase
Osteoclastogenesis
Eruption Pre-Functional: Mechanisms of Action
The outcome of signaling disruption on eruptive
movements:
Tooth fails to emerge but a clear eruption
pathway exists
