Mechanism Of Tooth Eruption Flashcards
Having one set of teeth
Animals like beluga whale dolphin, porpoise and the narwhal
Monophyodont
Having two sets of teeth
Two dentitions. The deciduous and permanent
Diphyodont
Month of emergence of deciduous teeth
6months ( mandi central incisor ) - 2 1/2 yo second molar
20 teeth total
Age where emergence of permanent teeth starts
6yo - 21 above
Permanent mandibular central incisor , wisdom tooth same ra (17-21)
32 total teeth
Age where mixed dentition occur
6yo to 11 1/2 yo
Endless succession of teeth
Teeth are exfoliated or lost are soon be replaced
Polyphyodont
3 broad categories of tooth eruption
Continuously growth tooth
Continuously extruding tooth
Continuously erupting tooth
Type of broad cat:
There is a continuous growth of the tooth at the apex and continuous eruption throughout the life of the animal
Continuously growing tooth
Type of broad cat:
No gross separation between the anatomical crown and anatomical root
Continuously growing tooth
This form of tooth is characteristics of animals with rapid occlusal wear and eruption
Continuously growing tooth
Type of broad cat:
Has a defined crown and anatomical root
Continuously extruding tooth
Continuously extruding tooth cannot form new tooth structure, this results to an?
Gradual loosening and final exfoliation of the tooth
Type of broad cat:
No new tooth structure is being formed, results to gradual loosening and final exfoliation of the tooth
Continuously extruding tooth
This tooth form is characteristics of the lower incisors of sheep and cattle
Continuously extruding tooth
Type of broad cat:
As the tooth is worn, more of the anatomical cron extrudes and epithelial attachment migrates apically
Continuously extruding tooth
Type of broad cat:
Eruption does not occur by enlargement of the anatomical crown but rather by addition of the alveolar process
Continuously erupting tooth
Characteristic of human teeth
Continuously erupting tooth
Difference of tooth emergence and tooth eruption
EMERGENCE: refers to the initial stage of tooth development where it begins from beneath, the gum tissue, deep within the jawbone
EMERGENCE: occurs before tooth becomes visible or erupts through the gum tissue
EMERGENCE: formation of the tooth bud an the development of tooth crown, root and surrounding structure
ERUPTION: a fully developed tooth starts to move and break through the gum tissue, becoming visible in the mouth
ERUPTION: is a process by which a tooth “emerges” from the gum and takes its place in the dental arch
PHASE
The enamel organ lying within the developing jaw reaches full size along with completion of tooth crown calcification
Pre eruptive phase
PHASE
Movement of the developing and growing tooth germs within the alveolar process before tooth formation
Pre eruptive phase
Shift of the entire tooth germ
Bodily movement
Part of the tooth continues to grow while the rest of the tooht remains constant
Eccentric growth
Direction in which the primary tooth moves
Occlusal and facial direction
Direction in which the permanent tooth moves
Lingual to primary
All movement within this phase takes place with the cryptos of the developing an growing crowns before root formation
Pre eruptive phase
Begins with root formation, PDL and dentinogingival junction
Eruptive or pre functional phase