KeyCast resin

The KeyCast dental resin is manufactured by KeyStone Industries as part of their KeyPrint line of precision 3D printing resins for the dental industry. The KeyCast resin was designed to produce residue-free and precise dental castings via investment molding. The low shrinkage formula used in the KeyCast resin controls thermal expansion to yield porous-free and accurate castings.

Image 1: Models 3D printed with the KeyCast resin. Source: KeyPrint.

Removable partial denture frames, crowns, bridges and copings can be made with the KeyCast resin in a clean ash-free burnout process with both rapid and gradual temperature ramping. The KeyCast resin is compatible with a variety of investment casting materials (chrome, cobalt, gold, and silver).

Image 2: A part 3D printed with the KeyCast resin before and after burning out. Source: KeyPrint.

The casting materials recommended for the KeyCast resin are the KeyVest universal dental investment material, the Satin Cast 20 by Kerr or Ultra-Vest by Ransom & Randolph. Using these materials will prevent adverse reactions between the casted part and investment material during the burnout process.

Image 3: Burnout schedule for different flask sizes. Source: KeyPrint.

For best results, flasks should be centrifuged to remove any air bubbles, and bench cured for 2 hours prior to burnout. A space of 4 mm or more should be left between part edges and the outside edge of the flask to ensure proper absorption of expansion during burnout. The temperature ramp should be held at 260°C (500°F) for at least one hour to ensure proper part dimensional stability.

They KeyCast professional dental resin from the KeyPrint line ensures a smooth 3D printing experience and high quality finished parts, with a simple post processing and casting process. The KeyCast resin will produce reliable parts on any compatible resin 3D printing equipment (consult Downloads section), thus reducing the cost and effort required to start using the KeyPrint materials.