Page 662 - My FlipBook

660 PLANTATION OF TEETH.
tlio reainors described on a previous page are tlieu used to remove the
core and enlarge tlie socket.

Fig. 585.

Younger-Walker trephines. Rollins' spiral
knives.

The spiral knives (Fig. 585) devised by Dr. W. H. Rollins of
Boston are in many cases very useful.
They are also open to the objection of clogging. As an improve-
ment upon these the spiral crib knife shown in Fig. 586 has the
advantage of permitting the core to pass within it.

Fig. 586. Fig. 587.

Fig. 588.
^ (^ /tl /fj^
m 111 ffi m
9 m Ptl HE

Hi
1

12
1 2 3 4 5
Ottofy spiral Two forms of Cryer's Ottolengui's reamers.
crib knife. spiral osteotome.
Dr. R. Ottolengui, of New York, has devised a set of reamers (Fig.
There are nine leaves to each reamer and each leaf is divided
588).
Three of the leaves reach the apex of the cone point
into five teeth.
and thus allow a more ra])id forward drilling into the bone. A sliding
collar forms a gauge to indicate the proper depth to drill.