A Study on Periodontal Dressing Materials: Part 5. The Working Times, Setting Times, Hardness and Liquid Quantity of Periodontal Dressing Materials

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.