2002
DOI: 10.1007/s00784-002-0173-4
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Contamination level of alginate impressions arriving at a dental laboratory

Abstract: The contamination level of alginate impressions delivered to a large dental laboratory in Sweden was determined. One hundred and seven consecutive alginate impressions were included during 7 days. Samples were taken and transferred into sterile physiological saline and analysed microbiologically for colony-forming units (cfu) as well as nonhemolytic, α-hemolytic, and β-hemolytic colonies. After sampling, the clinics were contacted and asked to fill in simple questionnaires about their routines of disinfecting … Show more

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Cited by 64 publications
(35 citation statements)
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“…4 Impressions have been considered the main source of infections in dental laboratories. 3 It is easy for impressions to be contaminated with microorganisms that are present in a patient's saliva and blood. Disinfection protocols have been recommended to prevent technicians from exposure to infectious diseases such as hepatitis B, hepatitis C, tuberculosis, herpes, and AIDS.…”
Section: Discussionmentioning
confidence: 99%
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“…4 Impressions have been considered the main source of infections in dental laboratories. 3 It is easy for impressions to be contaminated with microorganisms that are present in a patient's saliva and blood. Disinfection protocols have been recommended to prevent technicians from exposure to infectious diseases such as hepatitis B, hepatitis C, tuberculosis, herpes, and AIDS.…”
Section: Discussionmentioning
confidence: 99%
“…Three studies published in 1990, 1996, and 2002 reported that more than 60 percent of prostheses delivered to dental clinics from laboratories were contaminated with pathogenic microorganisms originating in the oral cavity of patients. [1][2][3] In prosthetic laboratories, lathes and pumice used for polishing and finishing of prostheses have been described as the greatest sources of contamination. 4 Potential pathogenic microbiologic crosscontamination from various sources by way of the dental laboratory has been documented, and guidelines to reduce it have been published.…”
mentioning
confidence: 99%
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“…5 Contaminated dental cast is a result of contaminated dental impression. 6 Therefore, prior the cast fabrication dental impression must be disinfected. The impression is then used to pour (usually gypsum-based) casts that imitate the patient's dental/oral features and the appliance is made to fit onto these casts.…”
Section: Introductionmentioning
confidence: 99%
“…The most used disinfection processes are chemical methods including immersion of the contaminated objects in sodium hypochlorite (5,6). However, the efficacy of this method on microorganisms has not been able to fulfill all disinfection requirements (4,7,8) and microbial transmission requires blockage by a practical, easy and effective disinfection or sterilization procedures.…”
Section: Introductionmentioning
confidence: 99%