Springing Plates in Soldering. [Volume: 2, Issue: 4, November, 1860, pp. 202-203]

202

THE DENTAL COSMOS.

in view, many years ago, division of the infra-orbital nerve, as it
emerges from the foramen, was advocated and practiced to a considerable extent. The relief afforded, however, appears to have been very
slight and transitory, and in the majority of cases there was almost
invariably a return of the suffering.
In the case of Dr. Pemberton, whose sufferings are described as of the
most aggravated character, division of all the branches was made by Sir
Astley Cooper, but without avail. This practice, though still pursued,
has been to a great extent abandoned, from a conviction that the seat
of the difficulty is not reached by it.
Within the past four years, Dr. Carnochan has advocated exsection of the trunk of the second branch of the fifth pair, beyond the ganglion of Meckel, removing at the same time the ganglion, or insulating it
and its branches from the encephalon. This operation, which he has performed on three different occasions, is quite a formidable one, and when
the cause of suffering is posterior to the ganglion, will prove as unavailing
as section of the peripheral extremity of the nerve. The operation, as
performed by him, is as follows: The integuments of the cheek are dissected away from the superior maxilla so as to completely expose the
anterior wall of the antrum. The anterior and posterior walls of the
antrum are then perforated by means of the trephine and chisels. By this
means an opening having been made into the spheno-maxillary fossa, the
ganglion of Meckel is readily reached and removed. A portion of the
inferior maxillary nerve about two inches in length is removed at the same
time. Dr. Carnochan states that in the three cases performed by him, the
relief afforded by the operation has continued from that period.
Excision of the inferior dental branch of the lower maxillary nerve has
also been frequently performed in cases where the pain has been confined
to the lower jaw, affording, according to the statement of operators,
prompt and enduring relief. In performing this operation an incision is
first made through the integuments over the ramus of the lower jaw. The
nerve is then exposed by applying the crown of a trephine upon the
bone at a point immediately below the entrance of the nerve into the
dental canal.
SPRINGING PLATES IN SOLDERING.
BY A. BERRY, D.D.S.
IN the DENTAL COSMOS for April last is an article on soldering without warping the plates. Probably the process given is advantageous,
but perhaps it does not entirely obviate the difficulty, as no doubt the
springing of plates in soldering is caused mainly by the contraction of the
solder in cooling. I have heard several dentists, say, " I never have any