{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,13]],"date-time":"2026-08-13T19:34:49Z","timestamp":1786649689186,"version":"build-2736575974"},"reference-count":32,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"12","license":[{"start":{"date-parts":[[2025,12,1]],"date-time":"2025-12-01T00:00:00Z","timestamp":1764547200000},"content-version":"unspecified","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0"}],"content-domain":{"domain":["lww.com","ovid.com"],"crossmark-restriction":true},"short-container-title":[],"abstract":"ABSTRACT<\/jats:title>\n \n Background:<\/jats:title>\n \n Dental impressions are a known potential vector for cross-contamination between patients and the dental laboratory. Effective disinfection is, therefore, a critical step in infection control protocols. This\n in vitro<\/jats:italic>\n study aimed to evaluate and compare the antibacterial efficacy of ultraviolet (UV) radiation and 0.525% sodium hypochlorite solution for disinfecting two common impression materials: condensation silicone and alginate.\n <\/jats:p>\n <\/jats:sec>\n \n Materials and Methods:<\/jats:title>\n \n This\n in vitro<\/jats:italic>\n study employed a comparative experimental design to evaluate disinfection efficacy. A total of 195 samples were utilized, comprising 90 discs each of condensation silicone and alginate, alongside positive and negative controls (\n n<\/jats:italic>\n = 9 and\n n<\/jats:italic>\n = 6, respectively). All samples were experimentally contaminated with standardized suspensions of three pathogenic species:\n Streptococcus pyogenes<\/jats:italic>\n (beta-hemolytic Group A),\n Pseudomonas aeruginosa<\/jats:italic>\n , and\n Staphylococcus aureus<\/jats:italic>\n . The disinfection protocols consisted of either exposure to 0.525% sodium hypochlorite spray for 10 min or treatment with UV radiation using a dedicated device (\u201cFast Steril\u201d). Antibacterial efficacy was quantitatively assessed by enumerating the mean colony-forming units (CFUs) postdisinfection. Statistical analysis was performed using the Kruskal\u2013Wallis and Mann\u2013Whitney\n U<\/jats:italic>\n -tests, with the significance level defined at \u03b1 = 0.05.\n <\/jats:p>\n <\/jats:sec>\n \n Results:<\/jats:title>\n \n The analysis revealed a statistically significant difference in bacterial reduction based on the microbial species (\n P<\/jats:italic>\n < 0.001). UV radiation demonstrated superior efficacy compared to sodium hypochlorite in disinfecting condensation silicone impressions (\n P<\/jats:italic>\n < 0.05). Conversely, no significant difference was observed between the two disinfection methods for alginate impressions. Regarding bacterial susceptibility, the mean reduction in CFUs for\n S. pyogenes<\/jats:italic>\n was significantly greater than for\n S. aureus<\/jats:italic>\n and\n P. aeruginosa<\/jats:italic>\n (\n P<\/jats:italic>\n < 0.001), between which no significant difference was found (\n P<\/jats:italic>\n = 1.0).\n <\/jats:p>\n <\/jats:sec>\n \n Conclusion:<\/jats:title>\n Within the limitations of this study, UV radiation proved to be a more effective disinfection method for condensation silicone impressions than sodium hypochlorite spray. For alginate impressions, both methods were equally effective. Given its efficacy and the superior dimensional stability of UV-treated impressions reported in the literature, the adoption of UV radiation is recommended as a viable and efficient method for disinfecting both condensation silicone and alginate impressions, thereby mitigating the risk of cross-infection in dental practice.<\/jats:p>\n <\/jats:sec>","DOI":"10.4103\/drj.drj_530_25","type":"journal-article","created":{"date-parts":[[2025,12,30]],"date-time":"2025-12-30T16:00:45Z","timestamp":1767110445000},"update-policy":"https:\/\/doi.org\/10.1097\/lww.0000000000001000","source":"Crossref","is-referenced-by-count":0,"title":["Comparative evaluation of the antibacterial effect of ultraviolet radiation on alginate and condensation silicone impressions compared to hypochlorite"],"prefix":"10.4103","volume":"22","author":[{"given":"Farshad","family":"Bajoghli","sequence":"first","affiliation":[{"name":"Department of Prosthodontics, Dental Implants Research Center, Dental Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Farzaneh Mohammadzadeh","family":"Rostami","sequence":"additional","affiliation":[{"name":"Department of Bacteriology and Virology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hossein","family":"Gugunani","sequence":"additional","affiliation":[{"name":"Department of Prosthodontics, Dental Research Center, Dental Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Arezoo Mazaheri","family":"Nazarifar","sequence":"additional","affiliation":[{"name":"Department of Prosthodontics, School of Dentistry, International Campus, Tehran University of Medical Sciences, Tehran, Iran"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"276","published-online":{"date-parts":[[2025,12]]},"reference":[{"issue":"4","key":"R1-20251230","first-page":"779","article-title":"Dental impression materials and techniques","volume":"61","author":"Punj","year":"2017","journal-title":"Dental Clinics"},{"issue":"7","key":"R2-20251230","doi-asserted-by":"crossref","first-page":"496","DOI":"10.1093\/intqhc\/mzy058","article-title":"Quality of cross-infection control in dental laboratories. 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