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Volume 5 , Issue 1
January/February 1992

Pages 47-54

Efficacy of Various Spray Disinfectants on Irreversible Hydrocolloid Impressions

Westerholm, II/Bradley, Jr./Schwartz

PMID: 1520443

This study evaluated the effectiveness of eight disinfectant sprays on irreversible hydrocolloid impressions contaminated with three microorganisms (Staphylococcus aureus, Mycobacterium phlei, or Bacillus subtilis) or mixed oral flora. Alcide LD, OMC II, Biocide, and Professional Lysol Spray were relatively ineffective under the test conditions. Sporicidin and 0.525% sodium hypochlorite were able to effect a 4-log10 (99.99%) reduction against S aureus only. A 4-log10 reduction in bacterial counts was achieved by 5.25% sodium hypochlorite and Impresept in all tests except against B subtilis. Full-strength sodium hypochlorite (5.25%) was the most effective disinfectant overall and required the shortest contact time.

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