Effects of cleaners on the color stability of prosthesis silicone rubbers / 中华口腔医学杂志

ABSTRACT

<p><b>OBJECTIVE</b>To evaluate the effect of different cleaners on the color stability of two silicone rubbers used for maxillofacial prosthesis, and to provide recommendations for clinical use.</p><p><b>METHODS</b>Thirty skin-color columniform specimens (12 mm diameter, 10 mm height) of two silicone rubber (AA-2000; ZZY-1) were prepared, randomly divided into 6 groups according to the table of random number, and cleaned with the following solutions isopropyl alcohol (I), three kinds of denture cleaners (P Polident, S Steradent, C Cleansoft) and distilled water (D), simulating the total immersion time of 1 year (1, 15, 10, 3 and 10 min each time respectively). Control group was kept in dark place without treatment. The L(*), a(*), b(*) value were tested before and after immersion. Then color difference value was calculated.</p><p><b>RESULTS</b>Color differences were different among groups. Color difference in group I (A 2.15, Z 2.00) were significantly greater than that in any other group. There were no significant differences between groups using denture cleaner P (A 0.36, Z 0.36), C (A 0.42, Z 0.37) and S (A 0.33, Z 0.38), and group D (A 0.22, Z 0.23).</p><p><b>CONCLUSIONS</b>Isopropyl alcohol causes the most severe fading, and denture cleaners and distilled water cause obscure fading.</p>