ZOE (Zinc Oxide eugenol) cement is excessively used in dentistry since 1980s, depending on their use they vary widely in their properties. Zinc oxide eugenol cements are of low strength and they are least irritating of all dental cements and are known to have an outbound effect on dentin.
Types of zinc oxide eugenol cement
Type I (paste)
• Supplied in two paste form as temporary cement
• Paste dispensed on the paper in equal proportion and mixed
Type II (powder/liquid)
• ZOE cement is supplied in powder and liquid form
• It Is mixed on an oil resistant paper pad
• Mixing time of ZOE cement is 30-60 seconds
• Setting time of ZOE cement in the mouth is 3-5 minutes
Composition
Powder
Zinc oxide 69%
White rosin 29.3%
Zinc Stearate 1%
Zinc acetate 0.7%
Magnesium oxide
Liquid
Eugenol 85%
Olive Oil 15%
Properties
• Compressive strength- This is a relatively weak cement ranges from a low of 3-4 MPz up to 50-55 MPz
• Tensile strength- Tensile strength ranges from 0.32 to 5.3 MPa
• Modules of elasticity- 0.22 to 5.4 GPa
• Thermal Properties- thermal properties of ZOE are excellent
• Solubility and disintegration- The solubility of the set cement is the highest of all the cements, they disintegrate in oral fluids
• Adhesion- ZOE cement do not adhere well to the enamel and dentin, this is one reason why they are not often used for final cementation of crowns and bridges.
• Biological Properties- pH is 6.6-8 and they are least irritating of all the cements. Pulpal responses are mild and they have soothing effect on Pulp.
Uses
• For temporary and permanent cementation
• For temporary fillings
• Cavity lines and base
• Pulp capping agent
• Secondary use- root canal restorations
• Periodontal and surgical dressing
• Gingival tissue pack
• Insulating base
Advantages
• Wide variety of uses
• Sedative to the pulp
• Easily manipulated
Disadvantage
• Low strength
• High solubility
• Not used under composite resin
World class dental clinic in Pune is one of the best dental clinics for all the dental procedures. The doctors here decide when the zinc oxide eugenol cement is needed to be placed as temporary filling material for the patients to complete the treatment in the best way possible. Visit us at bestorthodontistbracespune.in to know more.