In vitro studies were made of periodontal dressing materials consisting of a eugenol group (Surgical pack [SHOWA], Neodyne pack, Periodontal pack) and a eugenolless group (Cello pack, Peripac, COE-pak).
The examination included:
9. Working times, 10. Setting times, 11. Hardness, and 12. Liquid quantity.
The results obtained were as follows:
1. Working times:
The working times were required time in the following order;
Periodontal pack, Cello pack, Neodyne pack, Surgical pack, COE-pak, Peripac.
2. Setting times:
The setting times were required time by method of Vicat's needle in the following order;
COE-pak, Periodontal pack, Cello pack, Neodyne pack, Surgical pack.
Peripac was similar to Cello pack.
The initial setting times by method of Gilmore's needle was required time in the follwing order;
Periodontal pack, Peripac, Neodyne pack, Surgical pack.
COE-pak and Cello pack were similar to Surgical pack.
The final setting times by method of Gilmore's needle was required time in the following order;
Periodontal pack, Peripac, Cello pack, Neodyne pack, Surgical pack.
No mesurment was possible to COE-pak.
3. Hardness:
The hardness was in the following order;
Neodyne pack, Surgical pack, Cello pack, COE-pak.
Peripac was similar to Neodyne pack.
Periodontal pack was similar to Surgical pack.
4. Liquid quantity:
The liguid quantity was required in the following order:
Periodontal pack, Surgical pack, Cello pack, Neodyne pack.
