Infection Control Protocols


The MDA Infection Control Manual, January 2006, section 9, pages 33-34 sets down the principals for laboratory asepsis. We expect that dental offices rinse off any organic debris or bio burden, identify the disinfection status, and attach the prescription to the outside of the bag before sending a case or prosthetic to the lab.

We have our own Safe Work Procedures for infection control of incoming cases. These include the use of a full spectrum disinfectant, GermiCide3, as one of the initial steps with impressions and we also use a hard surface disinfectant on our work areas, including the dental chair in our custom shade area. We use the infection control products from GERMIPHENE®, as well as personal protective equipment (PPE) barriers.

The return of a finished case cannot be held our same infection control standards as those incoming because once it has been delivered to the dental office we do not control the possibilities of exposure of the finished prosthetic. We believe that it is the responsibility of each clinical office to have infection control protocols in place. This will ensure the prosthetic is disinfected and the possibilities of contamination are eliminated until patient delivery.

Germiphene Web Site



Disinfection is an important step in protecting the health of patients and dental workers. There are a wide range of impression materials and disinfection products. Crosstown uses Germiphene products for our various Infection Control protocols.
Disinfection products need to kill organisms in the following groups: bactericidal; fungicidal; tuberculocidal; virucidal.

• Alginates or Agar: Oxidizing disinfectants, such as bleach or peracetic acid, are recommended by dental associations but they are harsh chemicals. High alcohol content and quaternary sprays can deform these materials unless they are sprayed right before pouring a model. A lower alcohol content spray, such as Germicide 3, can be used without issue, if poured within a 3 hours of spraying. By disinfecting the impression (the source of contamination), using a spray and leaving it for a minimum of 3 minutes, there should be no need to further disinfect the cast.
• PolyVinylSiloxane (PVS); silicone-base; polyethylene; zinc oxide can be disinfected with any type of germicidal products, such as Germicide 3, Germiphene, the Crosstown lab standard.
Germiphene recommends that all dental offices should establish consistent Infection Control protocols for all incoming lab cases. All cases returning from a lab should be sprayed a 2% Chlorhexidine disinfection product, be allowed to sit for 10 minutes, then rinsed before being delivered to a patient.

Disinfection of Dental Impressions Closing the Loop on Infection Control