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$ xiii.— Manner of Mailing the Cramps of Incorruptible
Teeth*

The cramps which are introduced into incorruptible teeth,
are of such importance for solidly mounting them on the
backs, that the way to fix these cramps is not altogether a
matter of indifference.
AH the dentists are so well aware of the necessity of fixing
them firmly, that each one prepares them in the manner
which appears to him the most advantageous ; but he has
certain difficulties to overcome which are not always crowned
with success. We have seen, on many occasions, teeth made
by them, wherein the cramps were not solid, and where the
teeth were easily separated. This remark is made by all
those who use the incorruptible teeth, which has varied them
into numberless shapes by the introduction of cramps ; for
our part, we think it useless to single out here those that are
good for nothing, and we will limit ourselves to speaking of
those which we use, and which we have adopted after hav-
ing been convinced they are better than all the others.
To make cramps, take platina wire of a middling thick-
ness, pass it through the screw hole of a vice, then plate it
lightly : at length, being flattened sufficiently, without taking
it out of the vice, which ought to rest upon its sides, cut the
cramps of a sufficient length, and if you do not find the notch
of the vice sharp enough, cut it more with the file ; the
cramps made in this manner can be well fixed in the tooth,
and will never come out without breaking. See at length
the manner of modelling incorruptible teeth.

* These are little pivots of metal, placed in the tooth before baking,
which, after the baking, allow of being soldered to plates for insertion in
tbe tooth.