OxyFile #556

In vitro and Clinical Examination of the Effect of Ozone/Oxygen Gas 
Mixture on Impression Material on the Oral Microflora

A.W. Brauner

Department of Conservation,
Periodontology and Preventive Dentistry
Dental School of the RWTH Aachen
PauwelsstraBe 30, Aachen


Abstract:

The disinfection of the relatively unstable impression material 
alginate leads to a negative influence on the behavior of the 
material.  The disinfection by ozone oxygen gas mixture would 
eliminate these problems.  The aim of the study was to test the 
antibacterial/antiseptic properties of a gaseous ozone-oxygen mixture 
by use of a screening test in vitro, as well as a clinical 
investigation.

The diffusion test described by WALLHAUSER gave a negative result.  
The clinical study (impressions were taken of 30 volunteers, the 
impressions were disinfected by ozone oxygen gas mixture) showed no 
bacterial growth.  The control group showed a wide spectrum of 
bacteria.  The accuracy of the impression was investigated by SEM.

Due to its bactericidal effect, ozone-oxygen gas mixture can be 
recommended as a suitable disinfection of the relatively unstable 
alginate impression material.


Date: 1995