these include reversible hydrocolloid this includes agar impression material, irreversible hydrocolloid this includes alginate impression material, modelling plastic impressions these includes
impression compounds, plaster impression material, wax impression material, silicone based impression materials, polysulfide impression materials and polyether impression materials.3
Polyvinylsiloxane, polysulfide,
impression compound, and Zinc oxide eugenol (ZOE) impression materials are thoroughly rinsed under water and immersed in a 5.25% sodium hypochlorite solution for 10 minutes (9-12).
The tray was border- molded using green stick
impression compound taking care to avoid overextension.
The most common source of accidental injuries were burs used in high speed hand pieces (60.3%) followed by burns from
impression compound (19.1%).
Final Impressions were made using an admix of three parts by weight of
impression compound and seven parts by weight of tracing compound.
