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168 THE MICRO-ORGANISMS OF THE HUMAN MOUTH.
Preparations of enamel are to be stained in the same manner
as those of dentine, (See page 173.)
b. Appearances under the 3Iicroscope.
Microscopic examination of preparations of decayed enamel
brings to light in many preparations nothing more than a de-
pression (a loss of substance)
Ftq. G8.
with uneven margins (Fig.
63), a more or less pro-
nounced pigmentation of the
enamel in tlie vicinity of the
depression, and a distinct
appearance of the transverse
striation of the enamel-
prisms (Fig. 64).
Proxousced Striation
THK Prisms in Decay
OF Enamel.
250:1.
\ Ml L Dk
I \ I I 1 \l 1 \ 1 S 1 \ \'i
In other better prepared
o, Masses of bacteria lining the cavity. Circa 50 :
specimens the depression is
seen to be filled with masses of micro-organisms which readily
take on coloring-matter ; the margin of the cavity is indented, the
enamel cracked, the prisms falling to pieces. The spaces between
the loosened prisms are, in these cases, often filled with the same
fungal masses, whereas the latter never penetrate between the
prisms of normal enamel. In grinding, the masses of bacteria,
as well as the loosened prisms, are generally torn away.
168 THE MICRO-ORGANISMS OF THE HUMAN MOUTH.
Preparations of enamel are to be stained in the same manner
as those of dentine, (See page 173.)
b. Appearances under the 3Iicroscope.
Microscopic examination of preparations of decayed enamel
brings to light in many preparations nothing more than a de-
pression (a loss of substance)
Ftq. G8.
with uneven margins (Fig.
63), a more or less pro-
nounced pigmentation of the
enamel in tlie vicinity of the
depression, and a distinct
appearance of the transverse
striation of the enamel-
prisms (Fig. 64).
Proxousced Striation
THK Prisms in Decay
OF Enamel.
250:1.
\ Ml L Dk
I \ I I 1 \l 1 \ 1 S 1 \ \'i
In other better prepared
o, Masses of bacteria lining the cavity. Circa 50 :
specimens the depression is
seen to be filled with masses of micro-organisms which readily
take on coloring-matter ; the margin of the cavity is indented, the
enamel cracked, the prisms falling to pieces. The spaces between
the loosened prisms are, in these cases, often filled with the same
fungal masses, whereas the latter never penetrate between the
prisms of normal enamel. In grinding, the masses of bacteria,
as well as the loosened prisms, are generally torn away.
