ACE DNTL STUDIO

Minimal-Prep vs Over-Prepped Veneers

How much native tooth structure was preserved is the single most consequential clinical decision in any veneer case. Here is how to measure it.

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What is minimal-prep veneer preparation?: Minimal-prep veneers are bonded to teeth with 0.3 to 0.5 millimetres of enamel reduction — less than the thickness of a contact lens. The preparation preserves the full enamel layer where possible, which materially improves the bond strength and the long-term prognosis of the tooth. At ACE DNTL minimal-prep is the default approach wherever biology permits; deviation requires written justification.
How does minimal-prep affect the look of the veneer?: Minimal-prep cases score, on average, 0.44 points higher on the Translucency Index than moderate-prep cases — published evidence from the ACE DNTL 100-case dataset. A thinner ceramic over a substrate with full enamel coverage transmits light more naturally than a thicker ceramic over a partially reduced substrate. The natural translucency of the underlying enamel becomes part of the optical system.
Why does most cosmetic dentistry over-prep?: Aggressive preparation is faster, more forgiving of small fabrication errors, and produces a thicker substrate that is easier to bond. These are operational advantages for the clinic. The cost is borne by the patient over the next twenty years — fewer options if the case ever needs replacement, a different biological trajectory for the tooth, and a documented failure curve that begins to climb at the seven-to-ten-year mark.
What questions should I ask before any veneer treatment?: Three. First: what is the planned preparation depth, in millimetres, on each tooth? Second: under what conditions would the actual preparation deviate from the planned depth? Third: how is the preparation depth documented, and how can I verify it after treatment? A clinic that cannot answer all three with specifics is operating without a planned standard, a deviation protocol, or a clinical record.

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Medical disclaimer. Results of cosmetic and restorative dental treatment vary by individual. Information on this site is provided for general guidance only and does not constitute clinical advice. Every case is assessed in person before any treatment is proposed. Registered: ACE DNTL STUDIO · Av. Pilar Calvo, Centro Comercial Ibérico, 29660 Marbella, Málaga, Spain.