Objectives: The aim of this investigation was to evaluate the clinical performance of four types of toothcolored inlays.

Methods: Fifteen direct ceramic inlays (CEREC Cos 2.0), 15 direct composite inlays (Brilliant D.I. Coltène), 14 indirect ceramic inlays (VITA Dur N) and 14 indirect composite inlays (Estilux) were placed in 37 patients, according to the manufacturers' instructions. The inlays were evaluated 1 week (base-line), 6 months and 1, 3, 4, 5 and 10 years after cementation (modified CDA Quality Evaluation System).

Results: Three Vita Dur N inlays were replaced after 1, 4 and 8.5 years due to fractures or secondary caries. Three CEREC inlays were replaced after 4.5, 8.5 and 9.5 years, while 3 Brilliant D.I. Colténe inlays needed replacement after 1, 5 and 6.5 years, all because of secondary caries or fractures. Three inlays (Estilux) were replaced due to persisting hypersensitivity or pulpal damage. Five inlays (2 Vita Dur N, 1 Estilux and 2 Brilliant D.I. Coltène) were repaired due to minor fractures. During the observation period the surface texture of Vita Dur N inlays became significantly rougher (p<0.01).

Conclusion: About 80 percent of the inlays were in function after 10 years (including the repaired inlays). No statistically significant differences were revealed among the survival of the different types of inlays.

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