Page 156 - My FlipBook
P. 156
—;
there was the beginning of decay, either upon the gingivo-
Hngual or upon the gingivo-buccal or labial angle of the fill-
ing, and in most of them upon both. They all must be re-
moved and replaced because the extension had not been
properly made. And in every one of these three patients the
same thing was occurring, while otherwise the fillings seemed
to have been well done." Now don't fall into this error.
Study your cases with reference to the areas of liabihty and
prepare your cavities to meet the dangers. Knowing these
facts, you will be able to guard against these errors. Some
of the happiest experiences of my practice have been the num-
ber of persons who have grown up under my care to adult
life, who could say that they had never lost a tooth, had never
lost a filling, had never had to have a filling removed
grown up in families that were extremely susceptible to caries,
and for whom many fillings had to be made. And it will be
among the happiest experiences of your practice, each of you,
when patients can come to you and say that they have grown
up from childhood to manhood and womanhood without los-
ing a tooth, and without losing a filling that you have made
for them. If you do this you must do it by studying the
habits of caries, by studying the areas of liability, by studying
your manipulative procedures carefully and preparing your
cavities in a way to meet these dangers.
Now I think perhaps I have called your attention suffi-
ciently for the present to these areas of liability so that you
know them fairly well, yet you will excuse me if in the course
of my lectures I go over this again and again, because I
regard it as one of the prominent necessities of a successful
practice.
If you should undertake to make specimens of caries of
the enamel or caries of the dentin you should not expect to
find micro-organisms in the enamel. Micro-organisms do not
enter the enamel, because it is solid ; it has no natural open-
ings ; if there are openings at all in the enamel they are in the
form of faults. Micro-organisms have no power of pene-
trating enamel except as it is dissolved away by an acid, the
rods falHng out and making room for them in that way
otherwise than this we find no micro-organisms in the enamel.
In Dr. Williams' work you will note his surprise at finding
certain differences between backward decay of the enamel and
direct decay of the enamel. Direct decay is the penetration
T44
there was the beginning of decay, either upon the gingivo-
Hngual or upon the gingivo-buccal or labial angle of the fill-
ing, and in most of them upon both. They all must be re-
moved and replaced because the extension had not been
properly made. And in every one of these three patients the
same thing was occurring, while otherwise the fillings seemed
to have been well done." Now don't fall into this error.
Study your cases with reference to the areas of liabihty and
prepare your cavities to meet the dangers. Knowing these
facts, you will be able to guard against these errors. Some
of the happiest experiences of my practice have been the num-
ber of persons who have grown up under my care to adult
life, who could say that they had never lost a tooth, had never
lost a filling, had never had to have a filling removed
grown up in families that were extremely susceptible to caries,
and for whom many fillings had to be made. And it will be
among the happiest experiences of your practice, each of you,
when patients can come to you and say that they have grown
up from childhood to manhood and womanhood without los-
ing a tooth, and without losing a filling that you have made
for them. If you do this you must do it by studying the
habits of caries, by studying the areas of liability, by studying
your manipulative procedures carefully and preparing your
cavities in a way to meet these dangers.
Now I think perhaps I have called your attention suffi-
ciently for the present to these areas of liability so that you
know them fairly well, yet you will excuse me if in the course
of my lectures I go over this again and again, because I
regard it as one of the prominent necessities of a successful
practice.
If you should undertake to make specimens of caries of
the enamel or caries of the dentin you should not expect to
find micro-organisms in the enamel. Micro-organisms do not
enter the enamel, because it is solid ; it has no natural open-
ings ; if there are openings at all in the enamel they are in the
form of faults. Micro-organisms have no power of pene-
trating enamel except as it is dissolved away by an acid, the
rods falHng out and making room for them in that way
otherwise than this we find no micro-organisms in the enamel.
In Dr. Williams' work you will note his surprise at finding
certain differences between backward decay of the enamel and
direct decay of the enamel. Direct decay is the penetration
T44
