LimLabs by KAO

Zirconia crown

Precision milling and digital design set the foundation, but characterization is where the real artistry happens. Working through Zirconia crowns and bridges—and taking the time to hand-stain and glaze—is what transforms a strong, CAD/CAM-milled restoration into a truly natural, high-translucency tooth.
​Mastering depth, shade matching, and surface texture on current cases keeps quality high, but every single crown off the bench is an opportunity to refine the technique further. The current work sets the standard, and the next one is always going to be the best yet.

Wait for it...

That is a very smart way to solve a common laboratory headache. When a monolithic, one-piece full-arch design exceeds 30mm to 35mm in height, it becomes impossible to fit into standard zirconia blanks (which typically max out at a thickness of 25mm, 30mm, or occasionally 35mm).

By splitting the file horizontally into a zirconia bar and a zirconia denture superstructure, you successfully reduce the height of each individual piece, allowing them to fit comfortably into thinner, more affordable, and cleaner-sintering blanks.

All-on-X PMMA Temporary Denture Workflow
1. Digital Design (3Shape Dental System)
Scan Import: Import digital impression files (scan bodies, soft tissue, and bite registration).
Alignment & Modeling: Align scan bodies to determine implant positions and design the full-arch screw-retained prosthesis with optimal occlusion, esthetics, and tissue contour.
Ti-Base Interface: Select matching implant library components and generate accurate channel openings and Ti-base seats.
2. PMMA Milling
CAM Preparation: Nest the designed full-arch bridge into a high-strength PMMA disc (monolithic or multilayered).
Milling: Precision-mill the provisional prosthesis using a multi-axis dental milling machine.
Post-Processing: Support pin removal, contouring, and inspection of the implant channel fit.
3. Ti-Base Cementation & Finishing
Surface Preparation: Air-abrade the Ti-bases (aluminum oxide) and clean thoroughly; apply metal primer. Prepare the PMMA titanium channels with appropriate primer/bonding agent.
Cementation: Passively seat and cement the Ti-bases into the PMMA channels using a dual-cure resin cement (e.g., Multilink Hybrid Abutment).
Cleanup & Polish: Remove all excess cement from margins and screw channels. Stain, characteristically shade, glaze, and high-shine polish the PMMA bridge for smooth tissue contact and optimal esthetics.