What type of impression material is zinc oxide eugenol?
Zinc Oxide Eugenol (or) ZOE is a Irreversible Rigid Impression material used as a secondary technique to take impression of Edentulous patients with the help of Mucocompessive technique. As seen in the name this impression material is made up of Zinc Oxide and Eugenol (Oil of cloves).
What is zinc oxide and eugenol used for?
Zinc oxide/eugenol cements are mixtures of zinc oxide (powder) and eugenol (liquid). They are mainly used as a lining or base under amalgam restorations and as temporary luting cements or filling materials.
Why ZOE is used for secondary impression?
Zinc oxide eugenol (ZOE) impression paste is the most commonly used material for complete denture wash impression due to its cost-effectiveness and ease of manipulation, while providing the advantage of ability to record fine minute tissue details.
What is the effect of zinc oxide eugenol on the pulp?
When zinc oxide-eugenol (ZOE) is applied to a dentinal cavity, small quantities of eugenol diffuse through the dentin to the pulp. Low concentrations of eugenol exert anti-inflammatory and local anesthetic effects on the dental pulp.
What is polyether impression material?
Polyether impression material is an elastic-type material, as are the polysulfide and silicone materials. These materials have demonstrated good accuracy in clinical evaluations and are thixotropic, which provides good surface detail and makes them useful as a border molding material.
What is alginate impression material?
Alginate is an elastic, irreversible hydrocolloid impression material. Irreversible hydrocolloid impressions form an inseparable part of indirect restorations. Alginate is one of the most frequently used dental materials; and alginate impression is a simple, cost-effective, and indispensable part of dental practice.
What can replace eugenol?
2-ethoxybenzoic acid
The most successful of these alternatives seems to be 2-ethoxybenzoic acid or ‘EBA’ (Fig. 2.6). Being a carboxylic acid, this is much more acidic than eugenol, and therefore much more reactive in salt formation than the phenol; this also leads to fewer problems with control of the setting rate.
What is Zoe impression paste?
A non-elastic irreversible impression material used for relining partial or complete dentures. It is supplied as a base paste containing zinc oxide, olive oil, linseed oil, zinc acetate, and a trace of water and a catalyst paste containing eugenol, filler, accelerator, gum rosin, and oils.
Is zinc oxide eugenol an irritant?
As a primary irritant and sensitiser, it is known to cause contact urticaria as well as chronic urticaria. However, eugenol causes allergic contact dermatitis, possibly because it can react directly with proteins to form conjugate and reactive haptens.
Is eugenol toxic to the pulp?
Very low concentrations of eugenol produce high toxicity in human dental pulp fibroblasts. Conclusions: All of the concentrations of eugenol that we evaluated produced high toxicity in human dental pulp fibroblasts of primary teeth.
What is the use of zinc oxide eugenol?
Zinc Oxide Eugenol (or) ZOE is a Irreversible Rigid Impression material used as a secondary technique to take impression of Edentulous patients with the help of Mucocompessive technique.
What do you need to know about eugenol cement?
Zinc oxide–eugenol cement ( Fig. 21.2) contains zinc oxide, rosin, and zinc acetate in the powder. The rosin increases fracture resistance and the zinc acetate is effective in accelerating the reaction rate.
How long does it take to mix a zinc oxide impression?
Mixing is done for 30-40 sec until no color streaks in the mix are seen & a uniform consistency is obtained. The mix is then transferred to a impression tray to take an impression. · Increasing the mixing time. · Increasing accelerator paste while mixing.
What kind of material is used for final impression?
The studies compared different materials used to make the final impression for dentures (alginate, zinc‐oxide eugenol, wax, and addtional silicone, polysulfide or polyether) and different techniques for making the final impression (open‐mouth versus closed‐mouth, single‐stage versus two stage‐two step), or both.