Carbon launches DB 4000 resin for tougher digital dentures

A denture base is built to be worn, pressed, and stressed every day. Carbon’s answer is DB 4000, a new resin for dental labs producing 3D-printed digital dentures on the company’s M-Series printers. The material is named for a reported 4,000 joules per square meter work of fracture, tested at 37 degrees Celsius in water under modified ISO 20795-1 conditions.

That number is Carbon’s measure of how much energy the material can absorb before fracturing. The company says DB 4000 is 31% tougher than the published work-of-fracture result of the category leader for denture base resins. The resin is FDA-cleared and compliant with ISO 20795-1, the international standard for high-impact denture base resins.

The material is meant to reduce friction in the lab rather than add another specialized stage. DB 4000 uses a single-cure, one-part workflow, so Carbon says it can fit existing digital denture processes without additional materials or processing steps. Its Automatic Print Preparation software is part of Carbon’s AO Suite and is designed to prepare the resin for printing on M-Series hardware.

Carbon’s internal validation reported 97% global accuracy within plus or minus 130 microns and 95% intaglio accuracy within plus or minus 100 microns. Intaglio refers to the inner surface of the denture base that fits against the wearer’s tissue. Those measurements come from the company’s own testing, so they describe Carbon’s validation rather than an independent comparison.

And so what, concretely? Dental labs in the United States that are validated on Carbon M-Series printers can use DB 4000 now, choosing among four gingiva shades: Light Pink, Original Pink, Dark Reddish Pink and Dark Meharry. Carbon also says the material offers a more competitive cost per part than leading alternatives, based on manufacturer suggested retail pricing. The launch gives those labs a tougher resin and a streamlined workflow, but only within Carbon’s existing printer ecosystem.