In vitro studies were made of physico-chemical properties effects 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 examinations included:
1. Absorption test, 2. Solubility test, 3. Consistency test, 4. Pigmentation test, 5. Temperature test and 6. pH.
The results obtained were as follows:
1. Absorption test:
Peripac showed a marked absorption; Periodontal pack, COE-pak, Neodyne pack and Cello pack showed a similarly less degree of absorption.
Surgical pack was in between.
2. Solubility on water showed similar to absorption test.
3. Consistency test:
Fifteen minutes after this experiment consistency was obtained in the following order; Periodontal pack, Neodyne pack, Cello pack, Surgical pack and COE-pak.
No measurments were possible for Peripac after one minute.
4. Pigmentation test:
Nonpigmentat ion was obtained in the following order;
Neodyne pack, Cello pack, COE-pak, Periodontal pack, Surgical pack and Peripac.
5. Temperature test:
Temperature of experimental materials showed 35.6-36.8°C, which did not seen to give a bad influence on a wound healing process.
6. Change of pH:
a) COE-pak was on the alkaline side.
b) Surgical pack and Neodyne pack shifted to alkalinity from acidity (pH experiment No. 1), the other method were showed of alkalinity.
c) Periodontal pack, Cello pack and Peripac were either acidic or neutral.
