IN VIVO MEASUREMENT OF COLOUR CHANGES IN 1600 NATURAL TEETH WITH POLA OFFICE PLUS BY SDI, AUSTRALIA

Objectives: The aim of the study was to evaluate the efficacy of professional bleaching treatment using the Pola Office + system (SDI Ltd.): the shade, chroma and value parameters of the anterior teeth were analyzed. Materials and Methods: 100 patients were selected at the Prosthetic Department of Modena and Reggio Emilia University. All patients underwent oral hygiene treatment and spectrophotometric analysis (Spectro Shade) of the 8 front upper and 8 lower teeth.: the variables L (value), c (chroma), and h (shade) were measured. Spectrophotometric analysis was repeated a week after initial bleaching. Results: The (L) value of the treated teeth increases after bleaching, the chroma parameter (c) showed lower values than those prior to treatment. The course of the shade parameter is uniform and constant for all patients, with a shift towards yellow chroma values. Conclusion: Esthetic results obtained using the Pola Office+ (SDI, Australia) bleaching procedure were visibly significant; this was confirmed by colorimetric analysis. The harmony between chroma, shade and value remained stable one week after the bleaching treatment. Clinical Significance: Pola Office+ is a conservative, cost-effective method of improving the colour of discoloured teeth.