The Effects of Oxygen-based Disinfectant on Dimensional Accuracy of Alginates

Objective: This study evaluated the effect of an active oxygen based disinfectant, 2 PerformÂ? (Schulke & Mayr, Germany) on the dimensional accuracy of four alginates, Alginoplast (Heraeus Kulzer, Holland), Kromopan (LASCOD, Italy), Alginmax (MAJOR, Italy) and Duplast (Dentsply, China). Method: A cobalt chromium master model with four cylindrical studs representing 2 canines and 2 molars was constructed. A total of 40 impressions for each alginates were taken and treated in 4 different conditions, Immediate pour (control); 10 minutes immersion in distilled water; 10 minutes immersion in 2 PerformÂ? and 30 minutes in 2 PerformÂ?. The impressions were then poured in Type III stone. Dimensional changes between the master model and the resultant casts were measured using traveling microscope. The change at an antero-posterior dimension (C) and 3 different interarch dimensions (A,B and D) were noted. Results: Two way ANOVA showed significant interaction between alginates and treatment conditions except for dimension B and D. One-way ANOVA test and Student-Newman-Keuls indicated no significant difference (P> 0.05) in dimensional accuracy of impressions treated with PerformÂ? for 10 minutes compared to the control group except for Alginoplast (dimension A) and Duplast (dimension C and D). The maximum deviation in the dimension after 10 minutes PerformÂ? immersion was 0.552 for Duplast and 0.147 to 0.213 for other alginates. Immersion in PerformÂ? for 30 minutes produced maximum deviation of 0.591 for Duplast in dimension C whilst 0.223 to 0.235 for other alginates. Conclusion: Active oxygen based disinfectant has an effect on the dimensional accuracy of the resultant cast for the 4 alginates. Although some results indicated significant change, the magnitude of deviation was clinically negligible. Apart from Duplast, all the alginates indicated good stability in 2 PerformÂ? even up to 30 minutes of immersion time. (This study was supported by University of Malaya ; R&D FO200/2003D). This record was migrated from the OpenDepot repository service in June, 2017 before shutting down.