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TIISTOKY OF DENTAL SURGERY 309
For the lower teetii the phUe assiiiiies the t'onii of a horse-slioe. willi plain,
curved, double wires passinsj
along the lingual iiortion. as in
Fig. 21.
By a suitable arrangement
of springs and wires adapted
to the necessities of each ease,
the expansion of the arch in
any direction, and every desired
movement of the teeth, may be
brought about.
In the following year
Fig. 21
(1883), J. J. R. P.VTRiCK' Coffin Split Lower Plate
devised and introduced his
novel method of ali^nint the teeth of either arch. The appliance, seen in
Fig. 22, consisted of a half-
round gold and platinum wire
bent to the form of the arch
and extending its full length.
Fitting this arch snugly, but
capable of sliding upon it, were
a number of sections cut from
lialf-round gold tubing. To
two of these slides gold bands
lifting the anchor teeth were
Fig. 22
soldered, while to the others,
Patricks' Arch and Attachments
loops, hooks, wedges or any
desired accessories were attached. To the buccal surface of the slides joined
to the anchor bands were fitted screws with convex heads, which operated
against the arch wire to hold it firmly in position." The ojicration of the
appliance is described as follows
"The apparatus acted as a lever of whicli the power is the elasticity of the
bow-spring, the fulcnims the points used for anchorage, and the resistance the
tooth or teeth to be moved. If these are outside the arch, the bow-spring is
adjusted so that its flat surface touches all of the projecting teeth, and is firmly
1 Dental Cosmos. Vol. XXIV. p. 4S0. Paper read before the Illinois State Dental
Society.
= In 1887 Dr. Patrick substitute.! screw clamii-baiids for the plain gold anchor bauds
as shown in cut.
TIISTOKY OF DENTAL SURGERY 309
For the lower teetii the phUe assiiiiies the t'onii of a horse-slioe. willi plain,
curved, double wires passinsj
along the lingual iiortion. as in
Fig. 21.
By a suitable arrangement
of springs and wires adapted
to the necessities of each ease,
the expansion of the arch in
any direction, and every desired
movement of the teeth, may be
brought about.
In the following year
Fig. 21
(1883), J. J. R. P.VTRiCK' Coffin Split Lower Plate
devised and introduced his
novel method of ali^nint the teeth of either arch. The appliance, seen in
Fig. 22, consisted of a half-
round gold and platinum wire
bent to the form of the arch
and extending its full length.
Fitting this arch snugly, but
capable of sliding upon it, were
a number of sections cut from
lialf-round gold tubing. To
two of these slides gold bands
lifting the anchor teeth were
Fig. 22
soldered, while to the others,
Patricks' Arch and Attachments
loops, hooks, wedges or any
desired accessories were attached. To the buccal surface of the slides joined
to the anchor bands were fitted screws with convex heads, which operated
against the arch wire to hold it firmly in position." The ojicration of the
appliance is described as follows
"The apparatus acted as a lever of whicli the power is the elasticity of the
bow-spring, the fulcnims the points used for anchorage, and the resistance the
tooth or teeth to be moved. If these are outside the arch, the bow-spring is
adjusted so that its flat surface touches all of the projecting teeth, and is firmly
1 Dental Cosmos. Vol. XXIV. p. 4S0. Paper read before the Illinois State Dental
Society.
= In 1887 Dr. Patrick substitute.! screw clamii-baiids for the plain gold anchor bauds
as shown in cut.
