Abstract
Purpose: The aim of the project is to find out which method of occlusal splint construction gives the best fit and less dimensional changes by effect of two different environments on the materials which is used to fabricate splints. By the end of the project, the best type of material and way of making splint concluded and can be recommended. Methods: Heat cured acrylic (dough packing technique), orthodontic resin (sprinkle-on technique) and Light cured acrylic specimens prepared for this test. Cylinder stainless steel which has a series of grooves on one end for the testing of the reproduction of details is also used for this test. Impressions by alginate material were taken for this cylinder, and then poured by die stone. Each material was produced ten specimens. The distance between the grooves on the cylinder, stone model and specimen were measured by using travelling microscope. Five sets of specimens of each material were stored in water and other five sets in food simulating liquid (Coca Cola). Specimens re-measured at one day, one week and two weeks respectively to see how much they change. Results: There was very little variation between any of the materials dimensionally and between any of the storage conditions. Conclusion: There is no significant different between three materials.