Zirconia vs. Lithium Disilicate for CAD CAM Dentistry: A Dental Lab Buyer's Total-Cost Guide

Full disclosure: I manage procurement for a 22-person dental lab, not clinical care. My annual budget for dental laboratory supplies is around $250,000, and I have documented every order in our cost tracking system for six years. So this comparison is based on what actually appeared on our invoices and our remakes log, not what a marketing sheet claims.

In CAD CAM dentistry, the zirconia vs. lithium disilicate question usually starts with Which material is stronger? I start with Which material is less likely to be milled twice? A CAD CAM dental zirconia block can be the right answer, and a lithium disilicate block can also be the right answer. The issue is when the decision is based on the sticker price alone.

The framework I used

I compared both materials on three dimensions that matter to a buyer:

• Block invoice price
• Workflow and remake cost
• Dental lab material supplier dependability

I left out cases where a dentist has already specified a material for clinical reasons. If the doctor says the case must be a certain material, I stop trying to optimize cost. These comparisons are for the situations where the dentist basically says either material is acceptable.

Round 1: Block invoice price - zirconia wins

People assume zirconia is cheaper because it is. In January 2025, a CAD CAM dental zirconia block was roughly 35% to 60% less expensive than a comparable lithium disilicate block in our supplier quotes for the same shade and block size. I could end this article there if all I managed was a price list. But I manage the cost per case that leaves our lab, and that is a different calculation.

Zirconia wins the first round by a large margin.

Round 2: Cost per completed case - the surprise

Here is the part that changed my view. I used to buy zirconia blocks for most single-unit cases because the math seemed obvious. In Q1 2024, I pushed for a 30-day trial: mill single crowns from zirconia unless the dentist specifically asked for lithium disilicate. Posterior restorations looked good. The problem was an anterior crown batch. The lower-cost zirconia blocks did not have enough translucency for shade-sensitive cases, and our ceramicists had to spend extra time masking or layering. Two crowns came back for remakes because the shade was too flat against adjacent teeth. Those remakes ate up the material savings from the previous 15 restorations.

That trial taught me to track remake cost, not block cost. In anterior single crowns, the higher-priced lithium disilicate block often produces an acceptable result sooner. For posterior full-contour crowns and many cases of a monolithic ceramic zirconia bridge, zirconia still wins on total cost. The counterintuitive part: the material with the higher upfront price can be the cheaper finished product in esthetic cases.

I should add that we also use high-translucency and multilayer zirconia for anterior cases. It helps, but the extra cost moves it closer to lithium disilicate, and in our hands lithium disilicate still offered more consistent esthetics. That is a lab-specific judgment, not a universal law.

Round 3: Dental lab material supplier risk

A dental lab material supplier determines whether the material actually performs as ordered. From the outside, buying from a discount reseller looks like a clever cost move. The reality is that the cheapest supplier is only cheap when nothing goes wrong.

Last year, a flash-sale dental lab material supplier offered the same brand, shade, and block size for 12% less than our regular supplier. I nearly ordered without checking the return policy. I knew I should get written confirmation of the lot and dimensions, but I thought, what are the odds? The odds caught up with me when they shipped the wrong block size. The mistake cost us two days, one rush shipment from our normal dental lab material supplier, and a restocking fee on the return. The discount disappeared and went negative after the accounting.

That is not to say every discount supplier is bad. But when I compare vendors, I include four things:

• Lot traceability and batch documentation
• Return and replacement policy for defective or incorrect blocks
• Technical support for CAD CAM material questions
• Same-day or next-day availability of both zirconia and lithium disilicate blocks

Scenario-based recommendations

If you are asking me what to use, I would answer with scenarios rather than a single winner:

• Anterior single crown, translucent tooth shade territory: choose lithium disilicate, if clinically acceptable. The block invoice is insurance against a remake.
• Posterior single crown, full-contour design: choose a CAD CAM dental zirconia block for lower total cost.
• Posterior bridge where the dentist approves monolithic zirconia: a full-contour ceramic zirconia bridge is usually our cost leader.
• High-wear or bruxism cases: confirm with the dentist, but zirconia is often the better starting point.

Again, I am a buyer, not the prescribing clinician. I am only saying that once the clinical choice is approved, the total cost data determines my purchase.

Bottom line

Block price tells you what you pay at the invoice. Remake rate tells you what the material actually costs.

If you buy a CAD CAM dental zirconia block simply because it is cheaper, you can end up paying more on esthetic cases. If you buy a lithium disilicate block for every posterior bridge, you will overspend. Match the material to the case, and buy from a dental lab material supplier who supports you when the order is wrong. The five-minute check before milling beats a five-day redo every time.

Prices mentioned above are from our own supplier quotes as of January 2025, so they are useful for comparison but not a guarantee. Verify current prices with your dental lab material supplier before you make a purchasing change.