57 research outputs found
Microbiological evaluation of endodontic files after cleaning and steam sterilization procedures
The document attached has been archived with permission from the Australian Dental Association. An external link to the publisher’s copy is included.Background: Infection control procedures are essential for modern dental practice and they are continually evolving to meet the dental profession’s high standards. The present study evaluated the efficacy of two cleaning procedures to reduce bacterial numbers on endodontic files, and evaluated the effect of biological debris on the subsequent sterilization of files. Methods: Stainless steel and nickel-titanium (NiTi) files were examined upon removal from the manufacturer’s packaging, after instrumentation in root canals of human teeth inoculated with a broth containing two anaerobic species and one facultative anaerobic species of bacteria, and after instrumentation and cleaning with either an ultrasonic bath or a thermal disinfector. For each file, the bacterial numbers were quantified using routine microbiological techniques in an anaerobic chamber. Results: No bacteria were detected from files direct from their packets. The size, taper and type of file did not affect the ability of either of the cleaning procedures to reduce bacterial numbers. However, an absence of bacteria was more likely when files were cleaned in the thermal disinfector. No bacteria were detected from files that were subjected to steam sterilization irrespective of the type of prior cleaning procedure. Conclusions: Steam sterilization eliminated all bacteria from the endodontic files irrespective of the presence of biological debris. The majority of bacteria were eliminated from endodontic files after either ultrasonic cleaning or using a thermal disinfector.DA Van Eldik, PS Zilm, AH Rogers and PD Mari
COMPARATIVE EFFECTS OF ETHYLENE OXIDE, GAMMA IRRADIATION AND MICROWAVE TREATMENTS ON SELECTED SPICES
Physiologic disposition of 4\u27,4\u27\u27-bis(1,4,5,6-tetrahydro-2-pyrimi- dinyl)terephthalanilide and 4-(1,4,5,6-tetrahydro-2-pyrimidinyl)-4\u27- -(p-(1,4,5,6-tetrahydro-2-pyrimidinyl)phenyl)-carbamoylbenzanilide in dogs, monkeys, rats and mice.
Nucleic acid inhibition and the chemotherapeutic synergism of adriamycin (nsc 123127) and cyclophosphamide (nsc 26271). Abstr.
Reviving Antibiotics: Efflux Pump Inhibitors That Interact with AcrA, a Membrane Fusion Protein of the AcrAB-TolC Multidrug Efflux Pump
Relationship of phthalanilide-lipid complexes to uptake and retention of 2-chloro-4\u27,4\u27\u27-di(2-imidazolin-2-yl)terephthalanilide (nsc 60339) by sensitive and resistant p388 leukemia cells.
Intracellular localization and effects of 2-chloro-4\u27, 4\u27\u27-di(2- -imidazolin-2-yl)terephthalanilide (nsc 60339) in liver, kidney and p388 leukemia. Abstr.
Complex formation of drugs with a new class of phospholipids and its relationship to chemotherapy. Abstr.
- …