Two-Year Clinical Performance of Ultra-Thin No-Prep Veneers from 5Y-TZP Zirconia: A Retrospective Study

This retrospective study aimed to evaluate the two-year clinical performance of ultra-thin, no-prep Prettau^® Skin zirconia veneers placed in the anterior region of the maxilla and mandible.

This single-cohort retrospective series did not include a conventional control group. A total of 201 veneers (Prettau^® Skin, 5Y-TZP zirconia) were placed in the anterior maxilla and mandible. Veneers were air-abraded with 50 µm Al₂O₃ (0.25 MPa, ~10 mm, 20 s) and bonded using an MDP-containing adhesive (Tokuyama Bond, Tokuyama Dental, Japan) and dual-cure resin cement (Estecem II, Tokuyama Dental, Japan) following enamel etching with 37% H₃PO₄ (Etching Gel, Cerkamed, Poland). Clinical performance was assessed using the modified FDI criteria after two years.

At 24 months, no debonding events were recorded. The survival rate was 99.5% (95% CI: 97.3-99.9). Fracture rate was 0.5% (95% CI: 0.1-2.8). Most veneers received "very good" scores for surface luster (81.6%, 95% CI: 75.6-86.4), color match (96.0%, 95% CI: 92.0-98.0), marginal adaptation (84.1%, 95% CI: 78.3-88.6), and anatomical form (100%, 95% CI: 98.1-100). Periodontal response was rated as "very good" or "good" in 90.0% (95% CI: 85.4-93.4) of cases. Patient satisfaction remained consistently high (100%, 95% CI: 98.1-100).

Ultra-thin, no-prep Prettau^® Skin zirconia veneers show favorable short-term clinical outcomes, offering excellent esthetic results, mechanical stability, and biological compatibility. These findings support their use as a minimally invasive option in anterior restorative dentistry. However, further long-term studies are needed to confirm their durability and compare outcomes with conventional veneer techniques.