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CHAPTER XXI.
EXTRACTION OF TEETH.
By M. H. Cryer, M. D., D. D. S.
Indications for the Operation.
It is impossible to formulate a set of exact rules by which the prac-
titioner may be governed, in deciding upon the extraction of teeth. So
many circumstances both local and general must be taken into consid-
eration that little more can be done than to suggest the most important
causes which demand the operation.
Deciduous Teeth.—The indications for extracting deciduous teeth
are
First When the teeth are a source of irritation affecting the gen-
:
eral health or comfort of the child and do not respond to treatment.
Second When the deciduous teeth are preventing the eruption of
:
the permanent teeth into their normal jjositions. Occasionally a de-
ciduous tooth will assist in the proper placing of a permanent one,
in which case it should not be removed as long as it is of such
use.
Third : When a loAver ])ermanent incisor shows signs of erupting on
the labial side of the deciduous tooth, the latter should be removed at
once, but if the erupting tooth appears on the lingual side the removal
of the deciduous tooth may in that case be delayed somewhat longer.
Fourth When upper permanent incisors show a tendency to erupt
:
on the palatal side of the temporary teeth, the latter should be extracted,
but when they are erupting on the labial side the deciduous teeth may
be allowed to remain for a time, as they are often useful in forcing the
permanent teeth outwardly. This, however, must be closely watched
to prevent the permanent incisors from moving too far.
Permanent Teeth.—The indications for extraction of the permanent
teeth are
First : Diseased roots which cannot be cured and so made useful
for crowning, or assisting in retaining a bridge, ]>late, or other pros-
thetic device.
36 561
CHAPTER XXI.
EXTRACTION OF TEETH.
By M. H. Cryer, M. D., D. D. S.
Indications for the Operation.
It is impossible to formulate a set of exact rules by which the prac-
titioner may be governed, in deciding upon the extraction of teeth. So
many circumstances both local and general must be taken into consid-
eration that little more can be done than to suggest the most important
causes which demand the operation.
Deciduous Teeth.—The indications for extracting deciduous teeth
are
First When the teeth are a source of irritation affecting the gen-
:
eral health or comfort of the child and do not respond to treatment.
Second When the deciduous teeth are preventing the eruption of
:
the permanent teeth into their normal jjositions. Occasionally a de-
ciduous tooth will assist in the proper placing of a permanent one,
in which case it should not be removed as long as it is of such
use.
Third : When a loAver ])ermanent incisor shows signs of erupting on
the labial side of the deciduous tooth, the latter should be removed at
once, but if the erupting tooth appears on the lingual side the removal
of the deciduous tooth may in that case be delayed somewhat longer.
Fourth When upper permanent incisors show a tendency to erupt
:
on the palatal side of the temporary teeth, the latter should be extracted,
but when they are erupting on the labial side the deciduous teeth may
be allowed to remain for a time, as they are often useful in forcing the
permanent teeth outwardly. This, however, must be closely watched
to prevent the permanent incisors from moving too far.
Permanent Teeth.—The indications for extraction of the permanent
teeth are
First : Diseased roots which cannot be cured and so made useful
for crowning, or assisting in retaining a bridge, ]>late, or other pros-
thetic device.
36 561
