Experimental Assessment of the Effect of Disinfectants on Dimensional Changes, Recorded Details, and Superficial Quality of Zinc Oxide Eugenol (ZOE) Rostamkhani Fatemeh1, Dashti Hossein2, Noori Meysam3, Mahboobi Sara4,* 1Assistant Professor, of Fixed Prosthodontics, School of Dentisry, Shahid Beheshti University 2Assistant Professor, Department of Prosthodontics, Dental School, Mashhad University of Medical Sciences, Mashhad, Iran 3Post Graduate Student, Department of Orthodontics, School of Dental Medicine, Ahvaz Jundishapur University Of Medical Sciences, Ahvaz, Iran 4Post Graduate Student, Department of Orthodontics, Ahvaz Jundishapur University of Medical Science, Ahvaz, Iran *Corresponding Author: Sara Mahboobi, Post Graduate Student, Department of Orthodontics, Ahvaz Jundishapur University of Medical Science, Ahvaz, Iran
Online published on 27 November, 2019. Abstract Introduction Infection control has become an important issue for dental laboratory personnel and dental impressions become one of the infection transferring circle, so disinfection of impression is recommended by the (ADA) and the center for disease control. Methods In this experimental study, impressions were made of a master metal die witch is coated with a plastic Layer separator. Three chemical disinfectants (sodium hypochlorite %0.5, alkaline glutaraldehyde 2% and deconex 2%) were used in tow methods of spraying and immersion to disinfect the samples. The control group was not disinfected; so at least we had 7 groups: (immersion & hypochlorite), (immersion & glotaraldeid), (immersion & deconex), (spray & hypochlorite), (spray & glotaraldeid), (spray & hypochlorite), (control). Impression surface quality immediately after disinfection was categorized as shiny/matte, clean/mottled, pitted/non pitted. Dimensional stability was evaluated by measuring dimensional accuracy with streomicroscopy. Dimensional change percent was used in analyzing. Registered details evaluated (in sharp or round edges and angles) by comparing with control group. Results The ZOE material surface quality was significantly affected by deconex (likelihood Ratio, p0.05) and immersion method (fisher exact test, p0.05)with a matte, mottled and pitted surface on immersion method. Two way analyses of variance (ANOVA) (p0.05)indicate a significant difference in evaluation of both disinfection materials and methods but not in evolution of 3 disinfection materials or 2 disinfection methods separately. This difference was shown in use of glotaraldeid and deconex in immersion method. Conclusion In immersion method between 3 disinfection material deconex showed bad effect on surface quality of ZOE impression material, also Glotaraldeid and deconex disinfection materials in immersion method had significant effect on dimensional accuracy of disinfected impressions. Top Keywords Dimensional changes, deconex, zinc oxide eugenol (ZOE). Top |