Abstract: Objective: To observe and evaluate 3-year clinical performance of IPS e.max Press occlusal veneer for single posterior tooth. Methods: 35 posterior teeth of 28 patients (18 with severe tooth wear and 17 with occlusal defect after root canal treatment) were restored with IPS e.max Press occlusal veneer. The restorations were evaluated by Modified US Public Health Service criteria at baseline in month 1, 6, 12, 24 and 36. The chi-square test was used to analyze the survival rate. Results: The anatomical form, marginal adaption, soft tissue health, secondary caries and proximal contact points of the restorations were good during 36 months. 2 mandibular premolars’ occlusal veneers were lost at 24 months. But chi-square test showed no significant difference between different time points. The percentage of success rate with A score was above 90%. Conclusion: The occlusal veneer fabricated by IPS e.max Press for the restoration of posterior tooth with severe wear or occlusal defect after root canal treatment demonstrated satisfactory clinical performance during 36 months. Minimally invasive dentistry was a new method for the restoration of posterior tooth defect. Further study was still needed for its long-term outcome.

Key words: IPS e.max, Press system, Porcelain laminate veneer, Minimally invasive cosmetic dentistry