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SEPARATION OF THE TEETH IO3

1. Advantages:
(a) Comparative lack of soreness, except with
rubber.
(b) Diminution of danger to the fibres of the peri-
cementum.

(c) Abihty to temporarily force away, with gutta-
percha, swollen gum tissue from gingival
margins.
2. Disadvantages:

(a) Slowness.
The advantages and disadvantages of immediate separa-
tion may be mentioned as follows
1. Advantages:
(a) Quickness.

(b) Steadying or prevention of movements of the
teeth during the filling operation.
2. Disadvantages:
(a) Danger of rupture of the pericementum and

permanent loosening of the teeth.
(b) Pain.
The materials used in slow separation are:
1. Gutta-percha (base-plate or any variety of permanent
gutta-percha)

2. Cotton (dry and frequently changed).
3. Wood (orange wood or hickory).
4. Linen tape (covered with wax or chloro-percha)
5. Rubber (rubber dam, orthodontia bands or separating

strips).
6. Cork.
Following is a brief description of the method of use of
these materials:
I. Gutta-percha.—Pack the cavity over full, avoiding the

danger of too much pressure on the gum, and instruct the