1. Impression Materials

2. Prof. Dr. Manal A. El Ebiary
Dental Bio- Materials Department
Faculty of Dentistry
Tanta & MUST universities

21. Procedures for Gypsum Products
INFECTION CONTROL
Procedures for Gypsum Products
Impression Tray
Impression
Material
Infection Control Approaches (Strategies):
Additives in “impression material”
Immersion of “impression material” surfaces
Additives in “gypsum products”
Dental Arch
Gypsum products are generally cast into an impression that could contain bacterial or viral contaminants. Impressions are disinfected but the process is not sufficiently consistent to guarantee that there is not risk to laboratory technicians. Some gypsum products contain disinfectants. Lab technicians routinely wear gloves to protect themselves from persistent bacteria such as Hepatitis C.

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