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

OBJECTIVE

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.

MATERIALS AND

METHODS

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.

RESULTS

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).

CONCLUSIONS

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.