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Aims: To evaluate the additional operating expenses caused by shade matching by dental technicians in the dental practice and by color changes of fixed partial dentures., Methods: A questionnaire was handed out to visitors of the 2010 ADT dental technician congress in Germany. Thirty-one completed questionnaires were evaluated., Results: Mean costs caused by shade matching and shade correction per month were 1269$ (SD = 1278$; n = 25) and per unit of FPD 9.32$ (SD = 8.89$)., Conclusions: An improvement of shade matching, shade communication and reproduction should be made in order to minimize the considerable economic damage for dental laboratories.

48 patients treated with galvano-ceramic crowns and bridges were evaluated as to their plaque indices according to Silness and Löe (PI) and their papillary bleeding indices (PBI) according to Mühlemann. The mean values of PI and PBI were determined for all teeth as well as for defined groups of teeth: sound teeth, teeth with galvano-ceramic crowns and other restorative materials. Galvano-ceramic crowns showed the least plaque accumulation. Their PI was lower than the PI of sound teeth. Resin-veneered crowns and full cast crowns exhibited significantly higher PI-values in the posterior area. Crowned teeth had a higher PBI than sound teeth, but galvano-ceramic crowns showed lower PBI-values than crowns of other restorative materials.