New Lithium Disilicate Materials in 2026: IPS e.max Evolution vs. Celtra Press Comparison Guide

The lithium disilicate landscape just got more interesting. With IPS e.max Evolution hitting the market and Celtra Press gaining serious traction, we finally have some real competition in the chairside ceramic space. As someone who's been milling restorations for over a decade, I can tell you that material choice makes or breaks your CEREC workflow.

Let me walk you through what I've learned from six months of clinical testing with both materials. We'll cover the technical specs that actually matter, milling considerations, and most importantly – which cases warrant which material.

Material Properties: Where Science Meets Clinical Reality

Both materials represent significant advances over traditional IPS e.max CAD, but they've taken different approaches to solving our clinical challenges.

IPS e.max Evolution: The Strength Play

Ivoclar's latest iteration pushes flexural strength to 550 MPa – a 40% jump from the original e.max CAD. The crystal structure modifications they've made also improve machinability, which translates to cleaner margins and fewer chipped edges during milling.

What I've noticed clinically:

• Significantly reduced chipping on thin margins (0.5mm and under)
• Better translucency gradient across shade ranges
• Improved polishability – less chair time for finishing
• Compatible with existing IPS e.max crystallization cycles

Celtra Press: The Versatility Angle

Dentsply's approach focuses on processing flexibility. At 470 MPa flexural strength, it's not quite as strong as Evolution, but the real advantage is in the firing protocols. You can press, mill, or do hybrid workflows depending on your case complexity.

Clinical observations:

• Excellent shade matching to natural dentition
• Lower firing temperatures reduce sintering time by 15%
• Superior edge strength in thin sections
• More forgiving cementation – less technique sensitive

CEREC Milling Considerations

This is where the rubber meets the road. Both materials require some workflow adjustments, but they're not created equal when it comes to chairside efficiency.

Milling Settings and Bur Selection

For IPS e.max Evolution, I've had the best results with:

• Step bur 12S (primary shaping)
• Cylinder pointed bur 12 (fine detail work)
• 25% speed reduction from standard e.max settings
• Dry milling only – water cooling causes micro-fractures

With Celtra Press:

• Step bur 12S works well, but 10S gives better surface finish
• Standard CEREC speeds are fine
• Wet milling actually improves edge quality
• Less bur wear overall – about 20% longer bur life

Design Software Considerations

Both materials work with standard CEREC software, but there are nuances. Evolution requires the updated material library (version 5.2.3 or newer), while Celtra Press runs on the generic lithium disilicate settings with minor thickness adjustments.

For posterior crowns, I typically add 0.1mm to the occlusal thickness with Evolution – the material machines slightly thinner than programmed. Celtra Press mills true to design parameters.

Clinical Applications: Choosing the Right Material

Here's where experience trumps marketing materials. After placing over 200 restorations with these materials, clear patterns have emerged.

When I Reach for IPS e.max Evolution

Posterior crowns on heavy grinders: The extra strength pays dividends here. I've had zero fractures in bruxers – something I can't say about the original e.max.

Implant crowns: The improved machinability makes achieving passive fit much easier. Less adjustment time, better emergence profiles.

Minimally invasive preps: When you're working with 0.8mm occlusal reduction, every bit of strength matters.

When Celtra Press Makes More Sense

Anterior restorations: The shade matching is simply superior. Especially in the A1-A3 range where most of our cases fall.

Same-day cases with tight schedules: Faster firing cycles mean happier patients and better schedule management.

Complex anatomical cases: The material's forgiving nature during milling means fewer remakes on challenging geometries.

Economic Considerations

Let's talk numbers. Evolution runs about 15% higher per block than traditional e.max, while Celtra Press sits roughly 8% above standard lithium disilicate pricing. But cost per block doesn't tell the whole story.

Factor in reduced remake rates, faster processing times, and improved patient satisfaction, and both materials justify their premium. I've seen my lithium disilicate remake rate drop from 3.2% to under 1% since incorporating these newer materials.

Speaking of efficiency, practices investing in advanced CEREC technology often overlook optimizing their front-desk workflow. Intake.Dental brings that same digital efficiency to patient onboarding – something worth considering as you modernize your practice systems.

Crystallization and Finishing Protocols

Both materials require post-mill crystallization, but the protocols differ enough to impact your daily workflow.

IPS e.max Evolution Protocol

1. Pre-crystallization staining (optional but recommended for complex shading)
2. Standard e.max firing cycle: 840°C hold for 7 minutes
3. Characterization staining if needed
4. Glaze firing at 770°C

Total oven time: 45-50 minutes for full protocol

Celtra Press Workflow

1. Optional pre-shading with Celtra Ceram stains
2. Crystallization: 820°C hold for 8 minutes
3. Surface texturing and staining
4. Glaze cycle: 750°C (15% faster than Evolution)

Total oven time: 38-42 minutes

That 8-10 minute difference might not sound like much, but when you're running multiple cases, it adds up. I can typically squeeze in one additional same-day case per week with Celtra Press due to the faster firing cycles.

Cementation Considerations

Both materials follow standard lithium disilicate bonding protocols, but there are subtle differences worth noting.

Evolution seems more sensitive to contamination during try-in. I've had better long-term bond strength when using try-in paste versus water. The surface energy characteristics are different enough that saliva contamination affects bond strength more than with traditional materials.

Celtra Press is more forgiving here. Standard isolation and bonding protocols work reliably. The material also seems less prone to post-cementation sensitivity – something my patients definitely appreciate.

Long-term Performance Data

Obviously, we don't have 10-year data on materials that launched in 2025, but accelerated aging studies and short-term clinical follow-ups are promising.

Evolution shows excellent fatigue resistance in laboratory testing – 2 million cycles at 50N load with zero failures. In my practice, I haven't seen a single fracture in 8 months of use.

Celtra Press data suggests similar durability with better wear characteristics against opposing enamel. This could be significant for anterior restorations where wear compatibility matters.

Integration with Digital Workflows

Both materials play well with intraoral scanning and digital design workflows. Color matching through CEREC's SpectroShade integration works reliably with both materials, though I've found Evolution requires slightly more attention to lighting conditions during shade capture.

For practices using exocad or other design software, both materials have robust libraries available. The learning curve is minimal if you're already comfortable with lithium disilicate workflows.

Troubleshooting Common Issues

Marginal chipping during milling: More common with Evolution. Solution: Reduce feed rate by 20% and ensure burs are sharp. Replace step burs after 8-10 crowns instead of the usual 12-15.

Poor shade matching: Occasionally seen with Celtra Press in high-translucency cases. Pre-crystallization staining usually resolves this.

Crystallization defects: Both materials are sensitive to oven calibration. Monthly calibration checks are essential – these materials have tighter temperature tolerances than older ceramics.

My Clinical Recommendations

After extensive testing, here's my honest assessment: both materials represent genuine improvements over first-generation lithium disilicates. Your choice should depend on your case mix and practice priorities.

Choose IPS e.max Evolution if:

• You do significant posterior work
• Strength is your primary concern
• You're already invested in Ivoclar's ecosystem
• You prefer proven, incremental improvements

Choose Celtra Press if:

• Anterior aesthetics are crucial
• You value processing efficiency
• You want more forgiving handling characteristics
• Cost control is important

Honestly? I keep both in my practice. About 60% Celtra Press, 40% Evolution, depending on the case. The investment in having both options available has improved my clinical outcomes and patient satisfaction significantly.

Frequently Asked Questions

Can I use my existing IPS e.max crystallization cycle for Evolution?

Yes, the firing protocols are identical. Evolution uses the same crystallization temperature and timing as traditional IPS e.max CAD. Your existing oven programs will work without modification.

How do these materials compare to zirconia for posterior restorations?

Both offer better aesthetics than zirconia but slightly lower strength. For most posterior applications, the 470-550 MPa flexural strength is adequate. I reserve zirconia for severe bruxers or when maximum strength is required.

Are there any contraindications specific to these newer materials?

Standard lithium disilicate contraindications apply: avoid in severe bruxers without occlusal protection, patients with poor oral hygiene, or cases where preparation guidelines can't be met. No additional contraindications for these specific formulations.

What's the learning curve like when switching from traditional e.max?

Minimal for Evolution – it's essentially a drop-in replacement. Celtra Press requires about 5-10 cases to optimize your milling and firing protocols, but the fundamentals are the same.

Do these materials work with all CEREC generations?

Both materials work with CEREC MC XL and newer milling units. Older MC X units can handle them but may require more frequent bur changes and slightly longer milling times due to the improved material properties.

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