Disinfection Efficiency of Irreversible Hydrocolloid Impressions Using Different Concentrations of Sodium Hypochlorite: A Pilot Study

2007 ◽  
Vol 8 (4) ◽  
pp. 27-34 ◽  
Author(s):  
Maryam Memarian ◽  
Mohamad Reza Fazeli ◽  
Hossein Jamalifar ◽  
Ahmad Azimnejad
Keyword(s):  
Pilot Study ◽  
Sodium Hypochlorite ◽  
Immersion Time ◽  
Bacterial Contamination ◽  
Sodium Hypochlorite Solution ◽  
Gram Negative Bacteria ◽  
Gram Negative ◽  
Hypochlorite Solution ◽  
Potential Sources ◽  
Irreversible Hydrocolloid

Abstract Aim Dental impressions are potential sources of bacterial contamination which could eventually lead to transmissible infectious diseases through the blood or saliva. Sodium hypochlorite is an effective disinfectant recommended by the American Dental Association (ADA) in a 1:10 dilution for a ten minute immersion to disinfect irreversible hydrocolloid impressions. As the ADA protocol is sometimes neglected in busy practice settings, this pilot study was designed to determine an efficient and effective protocol for disinfection of irreversible hydrocolloid impressions. Methods and Materials Various concentrations of sodium hypochlorite and disinfection times were challenged against irreversible hydrocolloid impressions contaminated with six Gram-positive and Gram-negative bacteria. Results A two minute immersion time in a 0.6% solution of sodium hypochlorite protocol was found to prevent bacterial growth on the impressions. Conclusion Disinfection of irreversible hydrocolloid impressions in a 0.6% solution of sodium hypochlorite for two minutes was as effective as the ADA's protocol of using a 0.5% sodium hypochlorite solution for ten minutes to destroy the test bacteria. Citation Memarian M, Fazeli MR, Jamalifar H, Azimnejad A. Disinfection Efficiency of Irreversible Hydrocolloid Impressions Using Different Concentrations of Sodium Hypochlorite: A Pilot Study. J Contemp Dent Pract 2007 May;(8)4:027-034.

scholarly journals CONTROL OF BACTERIAL CONTAMINATION OF DENTAL UNIT WATER USING SODIUM HYPOCHLORITE

2019 ◽  
Vol 5 ◽  
Author(s):  
Amanda Cristina Morais De Castro ◽  
Rachel Maciel Monteiro ◽  
Pedro Castania Amadio Domingues ◽  
Marinila Buzanelo Machado ◽  
Ana Maria Razaboni ◽  
...  
Keyword(s):  
Sodium Hypochlorite ◽  
Water Samples ◽  
High Speed ◽  
Bacterial Contamination ◽  
Bacterial Load ◽  
Sodium Hypochlorite Solution ◽  
Hypochlorite Solution ◽  
Public Supply ◽  
Brazilian Legislation ◽  
School Of Dentistry

Objective: To evaluate bacterial load of water using and not using sodium hypochlorite aiming at bacterial control of dental unit water. Method: Dental unit reservoirs from a dental clinic from School of Dentistry of Ribeirão Preto -USP were filled with public-supply water with and without sodium hypochlorite solution at 0.0003%, and water samples were collected and evaluated by Petrifilm™ AC (Aerobic Count) system from 2014 to 2017. Results: No bacterial contamination was observed in the water samples using sodium hypochlorite solution. However, bacterial contamination was detected in water from reservoirs, air-water syringes and high-speed outputs (without handpieces) without the disinfectant. Conclusion: The use of sodium hypochlorite solution controlled bacterial load of all the dental unit water samples as established by Brazilian legislation (<500CFU/mL).

scholarly journals Safety assessment of an etidronate in a sodium hypochlorite solution: randomized double‐blind trial

2019 ◽  
Vol 52 (9) ◽  
pp. 1274-1282 ◽  
Author(s):  
N. V. Ballal ◽  
P. Gandhi ◽  
P. A. Shenoy ◽  
V. Shenoy Belle ◽  
V. Bhat ◽  
...  
Keyword(s):  
Sodium Hypochlorite ◽  
Safety Assessment ◽  
Sodium Hypochlorite Solution ◽  
Double Blind Trial ◽  
Double Blind ◽  
Hypochlorite Solution ◽  
Blind Trial

Reduction of Microbial Pathogens during Apple Cider Production Using Sodium Hypochlorite, Copper Ion, and Sonication

2004 ◽  
Vol 67 (4) ◽  
pp. 766-771 ◽  
Author(s):  
STEPHANIE L. RODGERS ◽  
ELLIOT T. RYSER
Keyword(s):  
Sodium Hypochlorite ◽  
Copper Ion ◽  
Microbial Pathogens ◽  
Sodium Hypochlorite Solution ◽  
Escherichia Coli O157 ◽  
Hypochlorite Solution ◽  
Apple Cider ◽  
E Coli ◽  
Log Reduction ◽  
Pathogen Reduction

Sodium hypochlorite (100 ppm), copper ion water (1 ppm), and sonication (22 to 44 kHz and 44 to 48 kHz) were assessed individually and in combination for their ability to reduce populations of Escherichia coli O157:H7 and Listeria monocytogenes on apples and in apple cider. Commercial unpasteurized cider was inoculated to contain approximately 106 CFU/ml of either pathogen and then sonicated at 44 to 48 kHz, with aliquots removed at intervals of 30 to 60 s for up to 5 min and plated to determine numbers of survivors. Subsequently, whole apples were inoculated by dipping to contain approximately 106 CFU/g E. coli O157:H7 or L. monocytogenes, held overnight, and then submerged in 1 ppm copper ion water with or without 100 ppm sodium hypochlorite for 3 min with or without sonication at 22 to 44 kHz and examined for survivors. Treated apples were also juiced, with the resulting cider sonicated for 3 min. Populations of both pathogens decreased 1 to 2 log CFU/ml in inoculated cider following 3 min of sonication. Copper ion water alone did not significantly reduce populations of either pathogen on inoculated apples. However, when used in combination with sodium hypochlorite, pathogen levels decreased approximately 2.3 log CFU/g on apples. Sonication of this copper ion–sodium hypochlorite solution at 22 to 44 kHz did not further improve pathogen reduction on apples. Numbers of either pathogen in the juice fraction were approximately 1.2 log CFU/ml lower after being juiced, with sonication (44 to 48 kHz) of the expressed juice decreasing L. monocytogenes and E. coli O157:H7 populations an additional 2 log. Hence, a 5-log reduction was achievable for both pathogens with the use of copper ion water in combination with sodium hypochlorite followed by juicing and sonication at 44 to 48 kHz.

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