A professional who forms plaster, metal, plastic, or rubber models and molds from dental impressions and wax models of dentures and dental appliances, using casting equipment and handtools. Responsibilities include:

• Mixes specified amounts of special plaster and water or other model-making ingredients, by hand or electric mixer-vibrator, to form compound used for models and molds.
• Pours mixture into impressions to form models for upper and lower dentures.
• Melts pieces of gold, silver, or other metal, using gas torch, and casts inlays, crowns, and pontics for fixed bridges, using centrifugal casting machine.
• Packs plastic mixture or composition rubber strips in molds to cast orthodontic appliances, such as tooth positioners, mouthguards, and retainers.
• Positions models in articulator and verifies occlusions.
• Packs plaster or other denture-making ingredient around wax model of denture to form model or matrix for casting denture.
• Places mold in boiling water to melt wax from cast model.
• Scrapes remaining wax from model, using knife, and washes model in soapy solution to remove dirt and foreign matter.