DEPRAG Gemstone ST Zirconia Disc
The DEPRAG Gemstone ST Zirconia Disc is a super translucent zirconia disc for dental laboratories working with strong, esthetic restorations in CAD/CAM workflows. As part of the DEPRAG dental material range, it is made for cases where durability, shade consistency and reliable milling performance are important.
For labs comparing zirconia discs for daily production, this dental zirconia disc offers 1250 MPa flexural strength and 42% translucency. It is suitable for posterior crowns, long-span bridges, implant frameworks and full-arch restorations where strength remains a key requirement.
DEPRAG Gemstone ST is positioned as a Super Translucent zirconia material with a balance between mechanical strength and natural-looking esthetics. The 1250 MPa flexural strength makes it suitable for demanding restorations, including posterior work and larger bridge structures.
The disc is made with high-purity Tosoh zirconia powder. This supports uniform density, color accuracy and structural reliability during dental CAD/CAM production, especially when the laboratory needs consistent results across multiple cases.
With 42% translucency, the material provides a more natural appearance than highly opaque zirconia while still keeping the strength needed for functional restorations. This makes it useful when the case requires both esthetics and resistance to fracture.
The disc supports both conventional and fast sintering workflows, with fast sintering possible in as little as 88 minutes. This gives the lab more flexibility when managing routine production, urgent cases or different furnace schedules.
DEPRAG Gemstone ST is available in the full VITA 16 + 4 Bleach shade range and multiple thickness options from 10 mm to 30 mm. It is compatible with 98 mm, 95 mm and 92 × 75 mm disc systems, which helps laboratories fit the material into different milling setups.
1250 MPa flexural strength: Supports strong restorations, including posterior crowns, long-span bridges and frameworks.
42% translucency: Provides a balance between strength and natural-looking esthetics.
Super Translucent zirconia: Suitable for cases where the restoration needs both durability and improved visual appearance.
High-purity Tosoh zirconia powder: Supports uniform density, shade consistency and reliable material structure.
Fast and conventional sintering: Can be used with normal sintering cycles or fast sintering from 88 minutes.
Full VITA shade range: Available in VITA 16 shades plus 4 Bleach shades.
Multiple thickness options: Available in 10 mm, 12 mm, 14 mm, 16 mm, 18 mm, 20 mm, 22 mm, 25 mm and 30 mm.
Disc system compatibility: Compatible with 98 mm, 95 mm and 92 × 75 mm disc systems.
Broad restoration use: Suitable for full-contour crowns, posterior restorations, implant frameworks and full-arch cases.
CAD/CAM laboratory workflow: Designed for milling and sintering in digital dental laboratory production.