SHADE SELECTION FOR SINGLE-UNIT ANTERIOR METAL-CERAMIC CROWNS - A 5-YEAR RETROSPECTIVE STUDY OF 2,500 CASES

Purpose: The purpose of this study was to investigate the distribution of shades selected for metal ceramic crowns provided at a dental teac hing hospital. Materials and Methods: Data on the selection of shade f or 2,500 metal ceramic crown units, placed over a 5-year period at the University Dental Hospital of Manchester, were collected and analyzed . Only those crowns placed adjacent to minimally restored vital teeth were included in the study. Results: The results indicate that the mos t frequently chosen shades were in the mid-range of reddish-brown hue. Furthermore, shades in the reddish-grey range of hue were rarely chos en. The selection of more than one shade for a crown (''mixed shades'' ) was generally restricted to the maxillary anterior teeth. Conclusion : Knowledge of the distribution of shades selected for permanently lut ed metal ceramic crowns may be a useful adjunct in shade selection, pa rticularly for the inexperienced operator.