Abstract
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.
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