Ep. 713 - From Blocks to Furnace: Unlocking Same-Day Zirconia Success

What if you could deliver high-strength zirconia crowns in the same timeframe as traditional glass ceramics, with better fit and no adhesive bonding required?

Dr. Mike Skramstad, a 2000 graduate of the University of Minnesota School of Dentistry with 20 years of teaching experience, brings deep expertise in digital dentistry to this conversation. As a resident faculty member at Spear Education and product consultant for multiple dental companies, he has been alpha/beta testing zirconia materials since 2010 and maintains a successful restorative practice focused on aesthetic, implant, and CAD/CAM dentistry. His extensive experience includes international lecturing on technology and implantology, plus numerous published articles on materials and digital workflows.

This episode explores the evolution of same-day zirconia delivery, examining how modern blocks and high-speed furnaces have transformed chairside ceramic workflows. Dr. Skramstad explains why zirconia's superior fit and conventional cementation capabilities are changing treatment approaches, and discusses the clinical advantages that make this material increasingly attractive for predictable restorative outcomes. The conversation covers material selection, furnace technology, and workflow optimization strategies that can enhance both efficiency and clinical success.

Episode Highlights:

• Zirconia blocks deliver superior marginal fit compared to glass ceramics because the oversized pre-sintered material is milled with smaller instruments, then sintered down to final dimensions. This improved fit contributes significantly to restoration longevity and reduces the common clinical scenario of "acceptable but could be better" margins.
• Modern zirconia blocks like the Katana block and IPS-EMAX ZirCAD Prime can be sintered in approximately 15 minutes using advanced furnaces, making same-day delivery clinically practical. The ZirCAD Prime features different strength zones within a single block, with 3Y cervical strength, 4Y body translucency, and 5Y incisal aesthetics.
• Zirconia restorations with adequate retention can be conventionally cemented using glass ionomer or resin cements, eliminating the isolation and bonding steps required for glass ceramics. For non-retentive preparations like veneers or onlays, adhesive bonding protocols should still be followed to ensure reliable retention.
• Versatile furnaces can handle multiple materials in one unit, performing zirconia sintering in 15 minutes, lithium disilicate crystallization in 11 minutes, and various glazing procedures. This consolidation reduces equipment costs and space requirements while maintaining workflow flexibility across different ceramic systems.
• Hybrid resin ceramic blocks require no sintering and can be used strategically for large indirect buildups or staged treatments where strength demands are moderate. These materials mill in 4-5 minutes but sacrifice long-term polish retention and stain resistance compared to traditional ceramics, making them suitable for specific clinical scenarios rather than routine crown fabrication.

Perfect for: General dentists using or considering CAD/CAM technology, restorative specialists interested in same-day workflows, and dental professionals evaluating zirconia integration into their practice.

Discover why proper preparation technique remains the critical success factor in digital dentistry, regardless of material choice.