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Combining zinc oxide and eugenol (contained in oil of cloves) forms zinc oxide eugenol which can be used as a filling or cement material used in dentistry. It is classified as an intermediate restorative material and has anaesthetic and antibacterial properties. It is sometimes used in the management of dental caries as a "temporary filling".
It has a boiling point of 250 degrees Celsius
Zinc oxide Eugenol is also used as an impression material during construction of complete dentures. Used in the mucocompressive technique of impression taking.
Zinc oxide Eugenol is also used as an antimicrobial additive in paint.
zinc oxide eugenol(ZOE) cements were introduced in 1980's.
zinc oxide 69% white rosin 29.3% Zinc stearate 2%(acts as accelerator) Zinc acetate 0.7% (improves strength)
ZOE impression pastes are dispensed as two separate pastes.One tube contains Zinc oxide and vegetable or mineral oil;the other contains eugenol and rosin.The vegetable or mineral oil acts as a plasticizer and aids in offsetting the action of the eugenol as an irritant.
Oil of cloves,which contains 70% to 85% eugenol, is sometimes used in preference to eugenol because it produces less burning sensation for patients when it contacts the soft tissues. The addition of rosin to the paste in the second tube facilitates the speed of the reaction and yields a smoother ,more homogenous product .
Canada balsam and Peru balsam are often used to increase flow and improve mixing properties.If the mixed paste is too thin or lacks body before it sets,a filler (such as a wax)or an inert powder(such as kaolin,talc,or diamaceous earth)may be added to one or both of the original pastes.
classification- according to ADA specification no. 30 TypeI temporary cementation TypeII permanent cementation TypeIII temporary filling material and thermal insulation TypeIV cavity liners
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