Page 321 - My FlipBook

HISTOKY OF DENTAL SUEGEPiY 287

In 1885 ( ?) Dr. H. A. Parr made a remarkable combiuation Richmond
cap-crown and wing gum-rest bridge.
In 1886 Dr. ^Y. F. Litcli made a Bing-stop substitute hood with headed
pin, and arm span bridge, also a half hood and pier-pin three-substitute span
and cap-crown fixed bridge.
In 1886 Dr. J. B. Hodgkin made a Bing-stop substitute-span, pier-post
and screw-with-nut bridge.
In 1886 Dr. E. Parmly Brown made a Bing-stop baked liody sul)stitute in
three styles.
In 1886 Dr. 0. W. Melotte made a cap-crown, one-substitute, shoulder-pin
wing-substitute.
In 1887 Dr. E. T. Starr made a four-stop porcelain tootli that remedies a
radical defect in the two-slop.
In 1887 Dr. J. L'ollo Knapp made a Bing-stop and Pichmond crown two-
substitute bridge, also a Pichmond crown fourteen-substitute cap-crown headed
pin, second molar pier and cuspid canal-post anchorages.
In 1888 Dr. S. S. Stowell made a Bing-stop gum saddle Pichmond crown,
two substitute bridge, and in 1891 he made a Bing-stop porcelain two-substi-
tute saddle and socketed span for pier post, and pier-stopping fi.xation, and in
1900 he made a cuspid pier having a large gold filling socketed for a vertical
pin on a shouldered extension of the two-substitute span, and a cap-crown for
the molar pier.
In 1889 Dr. W. E. Griswold made cusp-caps with pins for socket anchor-
age in live piers.
In 1900 Dr. G. Ij. Curtis made cap-crowns having soldered stops to be
cemented in like sockets soldered in the backings of the substitutes.
In 1900 Dr. .1. Leon Williams made a three-substitute span united by
baked body and gum, and having canal post pier fixation by cement.
In 1896 Dr. C. L. Alexander shov.-cd his method of preparing the live piers
with retaining sockets for corresponding pins in cast cusps or hoods, to which
the substitutes can be soldered.
In all crown and bridge-work thus far noticed, the pier fixation or anchor-
age has been designed for permanency.
Bridges of the Pichmond type, like those of the Bing type, are fixed on
their piers more or less securely to prevent displacement in their use.