Reducing continuing problems with zirconia crowns
By Gordon J. Christensen, DDS, PhD, MSD
Originally at dentaleconomics.com
Summary & scoring by The Bell Brief (Dr. Jennifer Bell) using the Drill-Down Protocol (Drill-Down Score) — not the original publisher.
Why it matters for dental
Practice owners and restorative dentists can reduce zirconia crown failures by changing lab instructions, cement choice, and preparation scanning techniques to cut margin leakage, premature debonding, and opposing-tooth wear.
Key points
- Clinicians Report Foundation in vivo data show labs commonly leave zirconia crowns 0.5 mm out of occlusion, causing months of opposing-tooth extrusion before contacts normalize.
- Conventional glass-ionomer cements (GC Fuji I, Solventum Ketac Universal) are recommended over resin cements because they bond to tooth structure, release fluoride, and reduce debonding rates.
- Milling contact areas 25 µm over-contoured offsets tooth mobility that occurs during intraoral scanning and prevents open contacts after seating.
- Internal staining of 3Y zirconia in the green state eliminates the feldspathic overlay that wears opposing enamel once the ceramic layer is lost.
Who should care
Read the original on Dental Economics
Full reporting and any paywall content live on dentaleconomics.com. We summarize and score; we do not republish.
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