Vascular pathways of human deciduous dental pulp

Abstract
The transition from deciduous to permanent teeth is a unique and dynamic process in which the development
and eruption of permanent teeth is coordinated with the resorption of deciduous teeth.
The vascularisation in pulp tissue of human deciduous teeth has not been as well studied as that within
human permanent teeth. Such information is useful to those who diagnose and treat children’s teeth.
In order to examine the reparatory pulp ability of deciduous teeth, it was our aim to determine vascular
structures in contrast to the histological appearance of noncarious human primary teeth with root completion and
physiological resorption, because the dental pulp is an active component in the life of the tooth.
Histological examinations of blood vessels in deciduous dental pulp were performed on a light microscope
and on a Transmission Electron Microscope.
When the process of physiological root resorption in deciduous teeth is initiated, blood vessels in pulp
tissue show some disturbances. Another area in which information is lacking involves changes in the blood vessels of
the deciduous teeth during the period of root resoption. Endothelial cells of arterioles, venules and capillaries are
cuboidal, with large pinocytotic vesicles, progressive reduction of luminal capacity, and reduction of the wall of the
pulp blood vessels.
Key words: deciduous teeth, dental pulp, root resorption, blood vessels, ultrastructure
Introduction
The transition from deciduous to permanent
teeth is a unique and dynamic process in which the
development and eruption of permanent teeth is
coordinated with the resorption of deciduous teeth.
Primary teeth contrary to permanent ones, have a relatively
short lifetime and functional duration, and are
subordinated to an early physiological resorption of the
roots.
In the past human primary teeth has received
little attention compared to similar research on permanent
teeth, because they are smaller and short lived, and due
to the belief that the pulps are similar. Now a days,
deciduous dental pulp is the origin of stem cells and is
progenitor for tissues with therapeutic expectations in
much disease in future1, 4.
Dental pulp is a unique tissue, responsible for
the tooth vitality, and when this tissue is damaged by
disease; it reacts in an attempt to defend by production of
protective dentine. From its non-specific and specific
defensive mechanisms, depends the survival of the tissue
in pathological conditions. This tissue passes three
phases: phase of root formation, phase of functional
duration and phase of physiological resorption of the root.
The vascularisation in pulp tissue of human
deciduous teeth has not been as well studied as that within
human permanent teeth. Such information is useful to
those who diagnose and treat children’s teeth.
Another area in which information is lacking
involves changes