Dental Unit Water Line Treatment with Sodium Hypochlorite and Acetic Acid

Acyclic N‐halamine‐based biocidal tubing: Preparation, characterization, and rechargeable biofilm‐controlling functions

“…The presence of biofilms on DUWL tubing was first reported in 1963,6 and this report has been repeatedly confirmed by subsequent investigations 7–17. Now it is generally accepted that because of the low flow rates and frequent quiescent periods, the inner surfaces of DUWL tubing are a particularly favorable environment for development of biofilms.…”

“…Accordingly, significant efforts have been made to control biofilms and improve dental water qualities. Current approaches include the use of independent water systems, intermittent or continuous chemical treatments, point‐of‐use filters, sterilizations of water delivery systems, and so forth 12–17. However, none of these methods could completely prevent the formation of biofilms, and high microbial counts in DUWLs continue to be concerns in general practice.…”

Metal Analyses of Dental Unit Water Systems

“…The presence of acid in the sodium hypochlorite solution greatly increases the oxidation potential of the hypochlorite anion (see next section). In theory, the increased oxidation potential should enhance biofilm removal, but it did not (6). The acid did increase the metal concentration in the effluent samples to an unacceptable level: as high as 98 ppm ( ).…”

“…Both generic sodium hypochlorite (5.25%) (Labbco Inc. Houston TX 77054) and Clorox (5.25%) (Purex Corp. Oakland, CA) were diluted with distilled water to yield 500 or 5000 ppm active chlorine (pH Å 11.6) or 5000 ppm chlorine in 1% commercial vinegar (Heinz, Pittsburgh, PA) (pH Å 4.1). The units were treated as previously described (4,6). All effluent samples were numbered as previously detailed: [Cl- Procedure.…”

Comparação dos meios de cultura e das técnicas de quantificação de bactérias e fungos em reservatórios e tubulações de água de equipos odontológicos

“…al., 1996;YABUNE;IMAZATO;EBISU, 2008;WATANABE et al, 2008;KRAMER et al, 2012). Para a limpeza destas tubulações e reservatórios normalmente foi empregado hipoclorito de sódio a 1% ou outros produtos químicos com: peróxido de hidrogênio, clorexidina e ácido acético (PUTTAIAH et al, 1998;WALKER et al, 2003;SACCHETTI, 2009;KRAMER et al, 2012), sem contudo eliminar totalmente o biofilme.…”