Root development + tooth eruption Flashcards
What does Hertwig’s epithelial root sheath (HERS)
Map out:
Initiates:
Breaks-down initiates:
root shape
root odontoblast differentiation
cementum + PDL formation
What two structures both grow down and fuse together into the dental papilla to form …….
IEE + OEE
root shape
Odontoblast differentiation:
The cells become ……… + ……..
secrete …… and turn into dentin once ……..
elongated
polarised
predentin
mineralised
What is the two cementum that form the root
acellular (coronal 2/3)
cellular (apical 1/3)
How do cell rests of malassez occur and what can they cause
HERS fragments leave clusters
dental cysts
In multirooted teeth what fuses together to form roots
epithelial diaphragm
In tooth eruption what occurs after reduced enamel epithelium
primary junctional epithelium
What occurs to primary teeth when secondary dentition is eruption
reabsorption
shredding of crown
What is not required for tooth eruption but accelerates speed
PDL tension
Root lengthing is not the cause for ……. ……..
tooth eruption
What occurs too teeth and roots in dentin dysplasia type I
very small teeth
very small roots
What is required for tooth eruption
alveolar bone metabolism
What controls alveolar bone metabolism during tooth eruption
dental follicle
The dental follicle is formed in two parts:
osteoclastic
osteogenic
What can sponastrime dysplasia cause in teeth and body
short roots
dwarfism
