Page 840 - My FlipBook

850 PATHOLOGY OF THE DENTAL PULP. ;

Fig. 448 I give an illustration, with a high power, taken from the
margin of a iielcl of inflammation, showing the inflammatory elements
distributed among the normal tissue-cells, a, a point out the normal
cells of the part ; these are all more or less swollen, especially their pro-
FiG. 448.

Inflammation of Dental Pulp: a,n, normal cells; 6, 6,6, 6, inflammatory elements; r, cells in process
of division (^^ in.).
cesses. At 6, b,b,b L have pointed out the inflammatory elements ; these
are leucocytes in the process of development and self-division, derived
from the blood (white corpuscles) or from the rejuvenation of the original
cells of the part. I have draAvn the outline of each individual cell and
its relation to its neighbors as perfectly as possible by aid of the camera
lucida, and it will serve to show of what the inflammatory change con-
sists, and how clearly it is seen by this mode of preparation.
As the inflammatory process proceeds, the normal cells of the part
disappear and are replaced by the inflammatory elements, which are in
fact young cells destined to develop and re-form the tissue, or degener-
ate and form pus, as they are
Fig. 449. more or less favorably placed.
The mode of origin of these ele-
ments is discussed at length in the
article on General Pathology. In
some instances we may see in our
sections, if not the actual diape-
desis of the white globules from
the veins, the results of this dia-
pedesis in the most unmistakable
manner. In Fig. 449 I give
an illustration of this as it ap-
^ pears in a section of a pulp that
seems to have been caught with
Section oT Dental Pulp, showing the invasion of the the inflammatory process rapidly
inflaiiiniatoi y process along the course of the veins
—the diapedesis of the white blood-corpuscles. invading its substance. The illus-
tration shows a group of distended
veins at a point just before they enter the root portion of the pulp
and the tissue immediately around each of the veins is thickly studded