11/5/2023 0 Comments Pouring alginate impression![]() It consists of a powder containing calcium or potassium sulfate and fillers as primary components. The alginate is a hydrocolloid material used in dentistry since 1940 because of its easy mixing, low cost and well accepted by patient 8,15,17. The most extensively used materials for this purpose are alginate and gypsum products 8. These replicas are made from impressions that poured to make what called cast model or die 14,19,21. In dentistry, there is a need for a replica of oral-dental tissues for diagnosis and treatment of oral diseases 11,19. Keywords: alginate impression dental stone contact time cast model properties. Conclusion: According to the results of this study, pouring of impression up to 9 hours can negatively affect the cast model properties in the term of details richness. In the meanwhile, hardness was improved with increasing contact time. Results: The dimension stability of cast models was not affected by increasing contact time between type III dental stone and alginate impression while surface details decreased. The samples were evaluated under light microscope for surface details, measured by digital caliper for dimension stability and hardness was tested by making indentation on the cast then measuring the depth using digital caliper. Thirty-seven cast models were separated after one hour (control group) and 30 cast models were separated from impressions after 9 hours. Material and methods: Sixty-seven cast models were obtained from stainless steel cylinder using alginate impression material and type III dental stone. Objective: To measure the effect of different contact time between the alginate impression and type III dental stone on cast model properties in the terms of dimension stability, hardness and surface details reproduction. III Department of Prosthodontics, Faculty of Dentistry, Thamar University – Thamar – Yemen II Department of Prosthodontics, Faculty of Dentistry, Al-Gazira University – Wad Medani – Sudan I Department of Oral Rehabilitation, Faculty of Dentistry, Khartoum University – Khartoum – Sudan ![]() Effect of contact time between alginate impression and type III dental stone on cast model propertiesĪmna Adam Ibrahim I,II Mohammed Nasser Alhajj I,III Magdi Wadie Gilada I
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |