The colonies were counted after sampling, inoculate and culture, which were used to deduce the killing logarithm value as the standard of the disinfecting efficiency. Methods As experimental group, germ-free alginate impressions and plaster models were sprayed with the compound disinfectant of different density trichloro hydroxyl diphenyl ether or indophors for 5, 10 and 15 min, after which were smeared with five tested pathogens, including Staphylococcus aureus, Escherichia coli, Saccha - romyces albicans, Streptococcus mutans and black spore variants of Bacillus subtilis. MediMatch Dental Laboratory Ltd is in no way liable for any clinical procedures and will not take responsibility for the use of the content of this protocol in a clinical or non clinical environment.Įach clinician is ultimately responsible for their own clinical decisions regardless of any advice given by MediMatch Dental Laboratory Ltd in any form.Objective The disinfection efficiency of a compound disinfectant spray with trichloro hydroxyl diphenyl ether on dental impression and plaster model, which have been contaminated by pathogens, were evaluated in this study.This protocol should not be followed if the circumstances are different or if in any way or form it is clinically not appropriate to follow it even if the circumstances are similar as in the protocol.Įach clinician should make their own decisions and not be restricted to following a protocol made by Medimatch Dental Laboratory Ltd.Clinicians will use their own technique, according to individual experience and training. This protocol was not based on experience in a clinical environment.This protocol is based on very limited experience Medimatch has with their cases and should only be used as an indication and not restrictive in any way or form.In addition to MediMatch’s normal terms and conditions we would like to point out that: It is not intended to be prescriptive – it is mandatory that all dental practices observe their Infection Control Policies and Procedures at all times, in accordance with all relevant UK Regulatory and Statutory requirements.
Please note: The above protocol describes a suggested impression and wax bite block disinfection technique, based on current UK good clinical practice guidelines. **** Jagger D.C., Vowles, R.W., McNally, L., & Davis O’Sullivan, D.J., ‘The Effect of a Range of Disinfectants on the Dimensional Accuracy and Stability of Some Impression Materials’. *** BDA Advice Sheet A12: “Infection Control in Dentistry” ‘Gypsum casts as a potential source of microbial cross-contamination’. ‘Disinfection of impressions in UK dental schools’, British Dental Journal,1988 164: 22-23. They should be rinsed again after disinfection to remove any residual disinfectant, and then sealed in a plastic bag for transfer to the dental laboratory. After the second spray, the bag should be sealed and the wax rims left for the time specified by the disinfectant manufacturer.
However, if the spraying method is utilised, it must always be undertaken within a plastic bag with the neck of the bag closely adapted around the neck of the spray nozzle.
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