Page 318 - My FlipBook

284 HISTORY OF DENTAL SL'RGERY

ing subject." This was the first attempt of tlie kind, but Dr. livens failed to
entirely cover the ground.
The second one in which an attempt was made to imitate the temporo-mand-
ibular joint with the joint mechanism of the articulator, and thus permit a re-
production of the masticatorv movement of Hie mandible, was made by Dr.
W. G. A. Bonwill, in 1858.
In 1889 Dr. E. S. I-Javes patented an articulator wliicli liad one new feature
—the direction of the condyle path.
In 18'J-± G. K. Bagl>y obtained a patent sliowiug an articulator of the or-
dinary construction, having attached to its joint pin a removable arm by
wliicli a measurement could he taken from a condyle of the mandible to the
mesial line of the trial jdate, and tliis measurement be transferred to the
articulator. (Dr. Snow in the '"Dentist's Magazine").
Many efforts have been made to reproduce the movements of the lower jaw
by means of an instrument, and the articulator of Dr. W. E. Walker is nearly
correct.
Parfit, Campion and Constant have proved that the path of the condyle is
not a straight line, but for all practical purposes it has been so represented
thus far, and the idea is further carried out in the Gritman and Christensen
(1901) articulators; the former was introduced in 1889 in combination with
Dr. G. B. Snow's face bow, which is the first and only implement for the loca-
tion of the models in the articulator whicli has, so far, been introduced that
fulfills all the conditions of that section of the problem.

CROWN AND BRIDGE WORK.

Artificial crown and bridge-work as now practiced was formerly called
"mechanical," but now it requires so much skill, art and esthetics, that the
term "mechanical dentistry" does not apply to it. This kind of work in its
highest development requires a versatility of talent, and depends upon master-
ing the fundamental principles and then using good judgment in applying
them.
Dentists will be most thorouglily impressed with the beauty and utility of
crown and bridge-work when they study the technics and numerous illustra-
tions to be found in the admirable works of Drs. George Evans and H. J. Gos-
lee.
The development and improvement in crown and bridge-work have been
very remarkable during the last few years, and now it is considered an artis-
tic and practical part of prosthesis.