IADR Abstract Archives
Comparison of disinfectants in dental units in the EU
ABSTRACT Introduction: Water delivered by dental unit water systems (DUWS) in general dental practices may harbour high numbers of bacteria, including opportunistic pathogens such as Legionella, Pseudomonas and Candida species. Biofilms in the DUWS tubing provide a reservoir for these microbes and hamper disinfection of the unit. Objectives: This study tested the efficacy of seven products to lower the bacterial load in DUWS outflow water to below the American Dental Association's guideline of 200 CFU.ml-1. Methods: The products Alpron, Bioblue, Dentosept, Oxygenal, Sanosil, Sterilex Ultra and Ster4Spray were tested in 134 DUWS in Denmark, Germany, Greece, Ireland, The Netherlands, Spain and the United Kingdom. A four week baseline measurement period was followed by eight weeks of disinfection. Weekly water samples were tested for total viable counts (TVC) and the presence of Pseudomonas species. Where possible, the effect of the products on biofilm removal was measured. Results: TVCs before disinfection ranged from 0 to 2.6 x 105 CFU.ml-1 (0 to 5.41 logCFU.ml-1). The products achieved a reduction of the median TVC ranging from 0.69 to 3.06 logCFU.ml-1, although occasional high values up to 7.6 x 104 CFU.ml-1 (4.88 logCFU.ml-1) were found during treatment. Biofilm TVCs were significantly reduced in the two countries tested (Greece and the UK), and Pseudomonas was recovered in one country. Conclusion: The results confirm the presence of high bacterial numbers in DUWS outflow water and show the ability of disinfecting products to reduce these values to °Ü200 CFU.ml-1. A ranking showed the hydrogen peroxide-based products to be most effective. Acknowledgement: This work was supported by the European Commission, specific RTD programme "Quality of Life and Management of Living Resources 4.1 Environment and Health" (QLK4-2000-00097).
Continental European and Scandinavian Divisions Meeting
2005 Continental European and Scandinavian Divisions Meeting (Amsterdam, Netherlands)
Amsterdam, Netherlands
2005
434
Scientific Program
Schel, A.j.
( Academic Medical Center, Amsterdam, N/A, Netherlands
)
Kamma, Joanna
( University of Athens, Piraeus, N/A, Greece
)
Mavridou, Athena
( University of Athens, Piraeus, N/A, Greece
)
Mandilara, G.
( University of Athens, Piraeus, N/A, Greece
)
Stoesser, Lutz
( University of Jena, Erfurt, N/A, Germany
)
Kneist, Susanne
( Medical University of Erfurt, Erfurt, N/A, Germany
)
Araujo, Rosa
( University of Barcelona, Barcelona, N/A, Spain
)
Contreras, Nuria
( University of Barcelona, Barcelona, N/A, Spain
)
Goroncy-bermes, Peter
( Schuelke and Mayr GmbH, Norderstedt, N/A, Germany
)
O'mullane, D.
( Oral Health Services Research Centre, Cork, N/A, Ireland
)
Burke, Francis M.
( University Dental School & Hospital, Cork, N/A, Ireland
)
Ten Cate, J.m.
( Academic Centre for Dentistry Amsterdam (ACTA), Amsterdam, N/A, Netherlands
)
Tobin, Maria
( Oral Health Services Research Centre, Cork, N/A, Ireland
)
O'reilly, P.
( University College Cork, National University of Ireland, Cork, N/A, Ireland
)
Hourigan, G.
( University College Cork, National University of Ireland, Cork, N/A, Ireland
)
O'sullivan, M.
( University College Cork, National University of Ireland, Cork, N/A, Ireland
)
Walker, James Taggart
( Health Protection Agency, Salisbury, N/A, United Kingdom
)
Marsh, Philip D.
( CEPR, Salisbury, N/A, United Kingdom
)
Moorer, Wilfred
( Academic Centre for Dentistry Amsterdam (ACTA), Amsterdam, N/A, Netherlands
)
Bradshaw, David
( CAMR, Salisbury, N/A, United Kingdom
)
Fulford, Martin
( Dental Surgery, Shepton Mallet, N/A, United Kingdom
)
Finney, Michelle
( Academic Centre for Dentistry Amsterdam (ACTA), Amsterdam, N/A, Netherlands
)
Frandsen, Ellen
( University of Aarhus, Aarhus C, N/A, Denmark
)
Ostergaard, E.
( University of Aarhus, Aarhus C, N/A, Denmark
)
2005 Continental European and Scandinavian Divisions Meeting (Amsterdam, Netherlands)
Amsterdam, Netherlands
2005
434
Scientific Program
Poster Discussion Session
Microbiology/Immunology and Infection Control
09/16/2005
Microbiology/Immunology and Infection Control
09/16/2005