Evaluation of Surface Detail Reproduction of Alginate Impression Material Incorporated with Different Ratios of Sodium Hypochlorite

Background and objectives: Alginate impression material considered widely used material for primary registration of oral tissue because it is accurate and simple to use. The objective of this study is to evaluate the antimicrobial efficacy of varying ratios of sodium hypochlorite as disinfection solution for alginate against Gram+ve streptococcus microorganisms and to measure the surface detail reproduction of alginate after disinfection. Methods: This experimental study was carried out in Hawler Medical University, Erbil College of Dentistry from December 15, 2022, to September 1,2023.40 samples of alginate were prepared, ten samples for each tested ratio (1%,3%,5%) of sodium hypochlorite and ten samples for distilled water as control group using stainless steel dies made in accordance with American Dental Association Specifications No. 18. The surface detail was evaluated after the alginate setting. Besides, three samples of each percentage were assessed for antimicrobial activity. Results: The samples of 1%, 3% sodium hypochlorite groups showed Owens score 1 for recording of 75 ?m and 50 ?m lines with no significant difference with control group. However, for line 20 ?m recorded mean score 2 for 1%, 3% samples which is considered significant according ADA 18 specifications. By raising the sodium hypochlorite ratios, the number of colonies decreased from 6% to 0% in terms of antibacterial activity. Conclusions: Surface detail reproduction were not dramatically impacted when sodium hypochlorite was added to the alginate as a disinfect. While they have a clear impact on the alginate impression's control group.