Adequacy of Sterilization Techniques for NOLA Dry Field Retractors
Abstract
Since its development in the mid-1980s, the NOLA Dry Field System (NOLA) has provided many orthodontists the means to achieve more optimal moisture isolation for orthodontic bonding procedures. However, while the small diameter suction tubing is desirable from a patient comfort standpoint, it is likely the most challenging component to effectively sterilize because of its narrow lumen. We hypothesized that there would be no bacteria present in the NOLA Dry Field suction tubing following mechanical rinsing with water and steam sterilization. Four test groups (N=10) including a positive control were inoculated with a 1.5 x 10 exp 7 CFU/mL solution of Geobacillus stearothermophilus. One group was not inoculated to serve as a negative control. All groups, excluding the positive control, were subjected to varying levels of mechanical cleansing prior to sterilization with a steam autoclave. Swipe tests were also collected from NOLA Dry Field cheek retractors and tongue guards to check for microbial contamination at the time of removal from their original packaging. Results showed no bacterial growth of any of the samples (groups 2-5) that were processed in the steam autoclave. Similarly, no bacterial growth was observed from the swipe samples collected from the NOLA systems taken immediately after removal from the packaging. Within the scope of this study, it appears that the NOLA Dry Field System can be successfully sterilized after bacterial contamination. This finding lends support to the claims by Great Lakes Orthodontics that it can be reprocessed for repeated use. Our swipe test results provide reassurance that the NOLA is free of microbial contamination immediately upon removal from the packaging. However, the author would still recommend following the manufacturer's recommendations for processing prior to use.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 30, 2018
- Accession Number
- AD1128222
Entities
People
- Katherine M. Lund
Organizations
- Uniformed Services University of the Health Sciences