[Reproducibility of measurements to assess the quality of dental restorations]

Criteria for assessment of the quality of dental restorations should be highly reproducible. To prove reproducibility of a set of modified Ryge-criteria we assessed the quality of 468 fillings (157 amalgam, 155 cast restorations, 156 composites). Assessment was done double-blind by two investigators. The amount of agreement between the investigators ranged from 56.1% to 88.4% depending on the criteria used. The more positive the results of the assessment and the more objectifiable the criteria, the higher was the amount of agreement. For an objective assessment the reproducibility of the method seems to be unsatisfactory.