This paper reports on a comparative investigation into the mechanical and handling properties of IASIS-900 and plaster of Paris. The traditional material used for casting has been plaster of Paris. However, despite its almost universal use it has a number of disadvantages which have been widely recognized for many years.

From 1991 3. 1 to 1991. 5. 30, 36 casting were performed on 30 patients using IASIS-900. The average follow-up was 7 weeks(range 4-17 weeks). The advantage of IASIS-900 are good X-ray penetration, waterproof, lightness, porosls, storage and less deformation. But the disadventage of IASIS-900 are short molding time and heat in handling.