D514 - Lecture 6: Tooth Eruption and Exfoliation
| Questions with Complete Solutions
tooth eruption
-movement of a tooth from its site of development within the alveolar process to its
functional position in the oral cavity
-first clinically detectable stage of tooth development
-begins only after crown formation is complete
active eruption
-movement from the developmental position inside the alveolar process to functional
occlusion
-includes minor eruptive movement to maintain occlusal contact
passive eruption
-(receding) movement of the gingiva, exposing more of the tooth or clinical crown
-tooth not actually moving but rather gingiva is receding making more of the tooth
visible in the oral cavity
3 stage of tooth eruption
1. pre-eruptive phase
2. eruptive phase
3. post-eruptive phase
Pre-eruptive phase
-1st phase of tooth eruption
-movements of developing teeth within the alveolar process before they begin to erupt
, -total bodily movement of the tooth germ (move lingual to buccal)
-eccentric growth
-A-B in image
eccentric growth
-growth in which one part of the tooth germ remains fixed while the rest continues to
grow, leading to a change in the center of the tooth germ (i.e. root elongation)
-occurs during pre-eruptive phase
-image: A-C shows bodily movements while D-E shows eccentric growth
eruptive phase
-2nd phase of tooth eruption
-begins with tooth located in the bony compartment, ends with occlusal contact
-from developmental position to its final functional position once crown formation is
complete
-intraosseous and supraosseous events
-C-E in image
4 major events within the eruptive phase
root formation (bc only 1/2 was completed)
movement (up/down)
penetration (break through the epithelium)
occlusal contact
root formation within the eruptive phase
| Questions with Complete Solutions
tooth eruption
-movement of a tooth from its site of development within the alveolar process to its
functional position in the oral cavity
-first clinically detectable stage of tooth development
-begins only after crown formation is complete
active eruption
-movement from the developmental position inside the alveolar process to functional
occlusion
-includes minor eruptive movement to maintain occlusal contact
passive eruption
-(receding) movement of the gingiva, exposing more of the tooth or clinical crown
-tooth not actually moving but rather gingiva is receding making more of the tooth
visible in the oral cavity
3 stage of tooth eruption
1. pre-eruptive phase
2. eruptive phase
3. post-eruptive phase
Pre-eruptive phase
-1st phase of tooth eruption
-movements of developing teeth within the alveolar process before they begin to erupt
, -total bodily movement of the tooth germ (move lingual to buccal)
-eccentric growth
-A-B in image
eccentric growth
-growth in which one part of the tooth germ remains fixed while the rest continues to
grow, leading to a change in the center of the tooth germ (i.e. root elongation)
-occurs during pre-eruptive phase
-image: A-C shows bodily movements while D-E shows eccentric growth
eruptive phase
-2nd phase of tooth eruption
-begins with tooth located in the bony compartment, ends with occlusal contact
-from developmental position to its final functional position once crown formation is
complete
-intraosseous and supraosseous events
-C-E in image
4 major events within the eruptive phase
root formation (bc only 1/2 was completed)
movement (up/down)
penetration (break through the epithelium)
occlusal contact
root formation within the eruptive phase
