Abstract :
Aim of the study: Evaluation the flow of a new experimental modeling waxes. Materials and methods: synthesis of one hundred twenty (120) samples of different modeling waxes by mixing different percentages of local natural waxes (hard paraffin, soft paraffin and beeswax) and additives (starch, gum Arabic, rosin and Na-CMC (Na-carboxymethylcellulose)) using mold made from brass according to ADA specification No.24, then measure the flow of them by using vicat apparatus after making modification. Results: The experimental modeling wax (80% hard paraffin 20% soft paraffin) and (80% beeswax 20% soft paraffin) had the most nearest properties to control (Poly wax) at 40°and 45°C and experimental modeling wax (90% beeswax 10% Starch) to control (Major) at 40°C and experimental modeling waxes (80% beeswax 20% hard paraffin), (80% hard paraffin 15% soft paraffin 5% beeswax), (70% hard paraffin 20% soft paraffin 10% Beeswax) and (90% Beeswax 10% Starch) to control (Major) at 45°C. Conclusions: Flow of waxes showed increased with the increasing heating the temperature from 40°C to 45°C.
Keyword :
Flow, Wax, Vicat apparatus