+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Overcoming the problem of residual microbial contamination in dental suction units left by conventional disinfection using novel single component suction handpieces in combination with automated flood disinfection

Overcoming the problem of residual microbial contamination in dental suction units left by conventional disinfection using novel single component suction handpieces in combination with automated flood disinfection

Journal of Dentistry 43(10): 1268-1279

Decontaminating dental chair unit (DCU) suction systems in a convenient, safe and effective manner is problematic. This study aimed to identify and quantify the extent of the problems using 25 DCUs, methodically eliminate these problems and develop an efficient approach for reliable, effective, automated disinfection. DCU suction system residual contamination by environmental and human-derived bacteria was evaluated by microbiological culture following standard aspiration disinfection with a quaternary ammonium disinfectant or alternatively, a novel flooding approach to disinfection. Disinfection of multicomponent suction handpieces, assembled and disassembled, was also studied. A prototype manual and a novel automated Suction Tube Cleaning System (STCS) were developed and tested, as were novel single component suction handpieces. Standard aspiration disinfection consistently failed to decontaminate DCU suction systems effectively. Semi-confluent bacterial growth (101-500 colony forming units (CFU) per culture plate) was recovered from up to 60% of suction filter housings and from up to 19% of high and 37% of low volume suction hoses. Manual and automated flood disinfection of DCU suction systems reduced this dramatically (ranges for filter cage and high and low volume hoses of 0-22, 0-16 and 0-14CFU/plate, respectively) (P<0.0001). Multicomponent suction handpieces could not be adequately disinfected without prior removal and disassembly. Novel single component handpieces, allowed their effective disinfection in situ using the STCS, which virtually eliminated contamination from the entire suction system. Flood disinfection of DCU suction systems and single component handpieces radically improves disinfection efficacy and considerably reduces potential cross-infection and cross-contamination risks. DCU suction systems become heavily contaminated during use. Conventional disinfection does not adequately control this. Furthermore, multicomponent suction handpieces cannot be adequately disinfected without disassembly, which is costly in time, staff and resources. The automated STCS DCU suction disinfection system used with single component handpieces provides an effective solution.

Please choose payment method:

(PDF emailed within 0-6 h: $19.90)

Accession: 058485336

Download citation: RISBibTeXText

PMID: 26248229

DOI: 10.1016/j.jdent.2015.07.018

Related references

Assessing microbial contamination in clean water dental units and compliance with disinfection protocol. Journal of the American Dental Association 125(9): 1205-1211, 1994

Disinfection of dental suction equipment. Tandlakartidningen 78(12): 670-675, 1986

Microbial contamination of suction tubes attached to suction instruments and preventive methods. Japanese Journal of Infectious Diseases 63(2): 124-127, 2010

Comparison of costs, waste and contamination of a closed endotracheal suction system versus conventional open suction systems. Intensivmedizin und Notfallmedizin 33(8): 601-605, 1996

Redesign of portable suction equipment cases: an engineering approach to a disinfection problem. American Journal of Infection Control 34(5): 281-284, 2006

The importance of suction devices in the microbial contamination of ambient air and of surfaces in intensive care units and long term artificial respiration units. Zeitschrift fuer die Gesamte Hygiene und ihre Grenzgebiete 18(9): 651-653, 1972

Contamination of a multiple-use suction catheter in a closed-circuit system compared to contamination of a disposable, single-use suction catheter. Respiratory Care 31(11): 1086-1091, 1986

Bacterial contamination of dental chair units in a modern dental hospital caused by leakage from suction system hoses containing extensive biofilm. Journal of Hospital Infection 59(4): 348-360, 2005

Disinfection of dental handpieces. Journal of Dental Research 69(SPEC ISSUE MAR): 348, 1990

Effect of different disinfection protocols on microbial and biofilm contamination of dental unit waterlines in community dental practices. International Journal of Environmental Research and Public Health 11(2): 2064-2076, 2014

Contamination of flexible fiberoptic bronchoscopes with Mycobacterium chelonae linked to an automated endoscope disinfection machine--on the relationship between the presence of the organism in the intestinal tract and contamination of disinfection machine, and a case of gallbladder and bile duct infection with M. chelonae. Kekkaku 70(10): 571-577, 1995

Prevention of microbial contamination of the dental unit caused by suction into the turbine drive air lines. Oral Surgery Oral Medicine Oral Pathology Oral Radiology & Endodontics 81(1): 50-52, 1996

Environmental contamination and airborne microbial counts: a role for hydroxyl radical disinfection units?. Journal of Hospital Infection 78(3): 194-199, 2011

Comparison of disinfection methods for dental handpieces. Zhonghua Hu Li Za Zhi 32(1): 26-27, 1997

A between-patient disinfection method to control water line contamination and biofilm inside dental units. Journal of Hospital Infection 56(4): 297-304, 2004