![]() ![]() The results showed that if the irreversible hydrocolloid was poured within 15 min, it could be used as a final impression material. The impressions were poured at 15 min, 30 min, one hr and three hrs after impression making. Jamani et al investigated the best storage condition and time for pouring irreversible hydrocolloid impression material. They concluded that immediate pouring made the most accurate cast. Storing of the impressions was carried out at different times as 10 min, 30 min, one hr and 24 hrs before pouring. ![]() Cohen et al studied the dimensional stability of three different irreversible hydrocolloid impression materials under five different storage conditions. Past studies have shown that these impressions between 0 and 12 minutes are necessary to maintain clinically acceptable accuracy. Several investigations have studied the dimensional stability of alginate-based impression, and different tests have been developed for analyzing this property. Therefore, whether or not irreversible hydrocolloid impression materials are accurate enough for restorative and prosthetic dental use is in question. Irreversible hydrocolloid impression material has dimensional changes as a result of synergists or evaporation of water when exposed to air. ![]() An impression material must have dimensional stability to cause the overall success of the cast made from it. ![]()
0 Comments
Leave a Reply. |