Ep. 813 - The Last Steps in Indirect Restorations Make All the Difference

Are you treating every indirect restoration the same way at cementation — and wondering why some cases still fail or leave patients sensitive? The answer often comes down to a few critical chairside decisions that most dentists make on autopilot.

Dr. Jennifer Derse is a restorative and cosmetic dentist with advanced training in clear aligner therapy and indirect restorations. A graduate of Marquette University School of Dentistry, she has lectured internationally and serves as a mentor at the Kois Center in Seattle, Washington — one of the most respected postgraduate dental education institutions in the world. Dr. Derse also leads clinical mentorship for incoming doctors at Espire Dental and has completed executive education programs at Harvard Business School Online, McKinsey, and the Ritz Carlton Leadership Institute.

In this episode, Dr. Derse walks through her complete cementation protocol for lithium disilicate and zirconia restorations, explaining how material choice should drive every downstream clinical decision — from intaglio surface preparation and bonding agent selection to cement choice and isolation strategy. The conversation is grounded in Kois Center-trained principles and enriched by Dr. Derse's hands-on mentorship experience watching real clinicians make real mistakes. Dr. Phil Klein, an endodontist and DMD, contributes additional clinical depth on dentin tubule anatomy and pulp proximity that every restorative dentist should understand before bonding near the pulp.

Episode Highlights:

• Lithium disilicate and zirconia require completely separate preparation protocols for the intaglio surface. Air abrasion is contraindicated on glass-ceramic restorations, while hydrofluoric acid etching is contraindicated on zirconia. Confusing these two tracks is one of the most common cementation errors seen in mentored clinical settings.
• For lithium disilicate crowns with an enamel margin, combining air abrasion with selective phosphoric acid etch on enamel produces superior mechanical retention compared to acid alone. The universal bonding agent is then scrubbed into both enamel and dentin — with the self-etching chemistry of the adhesive handling dentin bonding without the risks of total-etch technique.
• Silane must be applied as a standalone agent, not as a component embedded within a bonding agent. Because universal bonding agents are acidic — with pH values around 3.2 — they destabilize silane over time. For adhesively retained restorations with limited ferrule, a separate silane application step is essential to preserving the chemical bond at the ceramic-cement interface.
• For veneer cementation, light-cure resin cement offers superior control compared to dual-cure formulations because the ultra-thin restoration allows full light penetration. Try-in paste — a non-adhesive, shade-matched glycerin gel — allows the clinician and patient to preview the final color effect before committing to cement shade, which is especially important when masking dark underlying tooth structure or achieving very high-value aesthetics.
• Post-cementation sensitivity is often preventable with two key steps: using a dual-cure resin cement that integrates into dentinal tubules as its pH neutralizes during placement, and applying a calcium- and fluoride-containing self-adhesive liner when the preparation approaches the pulp. The anatomy of dentin itself matters — intertubular dentin decreases significantly near the pulp as tubule diameter increases, reducing available bonding surface and making pulp protection even more critical in deep preparations.

Perfect for: General dentists and restorative specialists who place indirect restorations, dental residents building their cementation protocols, and any clinician who wants to stop treating lithium disilicate and zirconia the same way at the cementation appointment.

If you have ever had a patient return with sensitivity, a dislodged veneer, or a shade result that surprised you, this episode gives you the clinical framework to make sure it does not happen again.