1DANISH MUZAFFAR, 2MOHAMMAD NASIR, 3AZAD ALI, 4AHMED TALAL,
5ASHAR AFAQ

ABSTRACT

Objective: The aim of this study was to measure the linear shrinkage of alginate impression material in various disinfecting solutions. Materials and Method: The two different alginates used were Blue Print Cremix (Dentsply, USA) and Hydrogum (Ivoclar vivadent, Liechtenstein) which are commercially available, whereas the two disinfectants used to measure the shrinkage of the alginates immersion materials were Perform I.D. (Schulke and Mayr, Germany) and sodium hypochlorite (Laboratories Rivadis, France). Distilled water was used as control and air was used to simulate clinical situation. Results: At the end of one hour Blueprint Cremix showed more shrinkage than Hydrogum in distilled water, 1 % Na Hypochlorite and Perform I.D. Whereas, in air Hydrogum showed more shrinkage than BluePrint Cremix. Conclusions: Immersion of the two alginates in disinfecting solutions has similar effect of net shrinkage, however the effect is more pronounced for BluePrint Cremix. Effect of disinfecting solutions on the dimensional stability of alginate impression material

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1Department of Science of Dental Materials Isra Dental College, Isra University, Karachi
2Department of Peridontology Karachi Medical and Dental College
3Department of Prosthodontics Armed Forces Institute of Dentistry, Rawalpindi
4Department of Dental Materials Armed Forces Institute of Dentistry, Rawalpindi
5Department of Community and Preventive Dentistry Isra Dental College, Isra University, Karachi