|
Intracellular collagen vacoules are seen in
|
Fibroblasts. In fibroblasts that are resorbing collagen, such
vacoules are seen |
|
During tooth eruption, PDL fibroblasts express, cytokeratin
|
19
|
|
In PDL, the epithelial cell rests are most commonly found on
|
This is age dependent. In first two decades, cell rests are most
commonly assoicated with apical region while from third decade they are intimately associated with cervically in gingiva |
|
The specific type of capillaries in PDL is
|
Fenestrated capillaries. Fibrous connective tissue often have
continous capillaries. In PDL this is fenestrated variant |
|
The sensory nerve fibers of PDL govern
|
nociception and mechanoreception
|
|
The autonomic nerve fibers of PDL govern
|
blood supply of PDL
|
|
Cell bodies of PDL Mechanoreceptor neurons lie in
|
trigeminal ganglion and mesencephalic nucleus
|
|
Formation of neural crest cell is induced by
|
Chordamesoderm
|
|
Organizational plan of of head is mediated by
|
Chordamesoderm
|
|
Positional relationship of various neural plates is governed by
|
Chordamesoderm
|
|
Notochord and prechordal plate arise initially within
|
Endoderm
|
|
Well organized mesodermally derived cells, caudal to ear is called
|
Somites
|
|
Less organized mesodermally derived cells, roustral to ear is
referred as |
Somitomeres
|
|
Inductive interaction of ventral forebrain and oral ectoderm leads to
formation of |
Pitutary gland
|
|
Mesodermal core of each visceral arch is primarily concerned with
|
formation of vascular channels
|
|
Origin of connective tissue components of tongue
|
anterior two third from first arch mesenchyme while the posterior
from third arch mesenchyme |
|
Enamel septum
|
when the enamel cord extends to meet the outer enamel epithelium, it
is enamel cord |
|
Enamel navel
|
the small depression at the meeting point of enamel septum and outer
enamel epithelium |
Prof. Rooban Thavarajah
Oral and Maxillofacial Pathologist
List