Objective: The aim of this investigation was to examine whether there is a local inflammatory influence on the surrounding gingival tissues of adhesively luted full ceramic restorations. Methods: 20 Cerec crowns and onlays were placed in 13 patients using Syntac classic as dentine adhesive. Variolink Ultra (10 cases) and Tetric ceram (10 cases) were used as luting composites. After 6 month pocket depths, a gingiva index (Loe and Silness) and a plaque index (Silness and Loe) were measured. At the contact area between the restorations and the gingival tissues, Periotron measurements were taken - especially in the in the approximal regions. The results of the restored teeth were compared with respective measurements at reference teeth that were located according to split mouth design, whenever possible. For statistical analysis the Wilcoxon matched pairs signed rank test (p£ .05, two tailed) was used.

Results:

	mean pocket depth mesial [SD] in mm	mean pocket depth distal [SD] in mm	Gingiva index	Plaque index	Periotron measurement
restored teeth n=20	2.7 [0.47]	2.8 [0.44]	0.5 [0.6]	1.1 [1.1]	20.6 [16.0]
reference teeth n=20	2.5 [0.80]	2.7 [0.77]	0.4 [0.6]	1.1 [0.7]	21.2 [17.0]

The Wilcoxon matched pairs signed rank test at p£ .05 showed, that there were no statistical differences between the values of the restored teeth and the reference teeth.

Conclusion: In this investigation there was no clinical evidence, that full ceramic restorations cause clinically detectable inflammation on surrounding gingival tissues in comparison to respective reference teeth.

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