The Assessment of Color Stability among the Four Base Resins in Different Edible Staining Solutions: An In vitro Study

Abstract

Aims and Objectives: The soul aim of this study is to assess the changes in color of different brands of commercially available heat cure denture base resins (Trevalon, DPI, Pyrax, and Ivoclar) processed by conventionally in long curing cycle and processed in injection molding flasks (Ivoclar) and the samples were compared by exposing them to various food beverages.

Materials and Methods: Four varieties of heat cure base materials, namely, IVOCAP (HI), Trevalon (HI, DENTSPLY, Gurgaon [India], Pyrax [Roorkee, UK], and DPI [Dental Products, Mumbai]) were taken to prepare the desired samplings. The size of each cubical sampling was 20*20*2 mm. A total of 64 samplings (F) were prepared and out of which 48 samples were processed by compression molding technique using heat cure denture base resins Trevalon (HI, DENTSPLY, Gurgaon), Pyrax (Roorkee), and DPI (Dental Products, Mumbai). Rest, 16 samplings were set in special flasks with the injection unit (Dentsply). Injection of condensed heat-polymerizing resin was completed under a pressure of 6 × 105 N/m2. The pressure was maintained during a 45 min polymerization in hot water (100°C). All the samples are marked by their company name as I – Ivoclar, P – Pyrax, T – Trevalon, and D-DPI.

Results and Statistical Analysis: The data were subjected to one factor analysis of variance and the significance of mean difference between (inter) the groups was done by Turkey’s honestly significance difference post hoc test. It was observed that significant changes in all the denture base resins were seen when observed after a period of 7–28 days.

Conclusion: Minimum changes were seen in Ivoclar-based samples. Maximum staining was caused by turmeric and tobacco. Highly smooth and polished surface and significantly less amount of monomer content decrease the staining capacity of food colorants, thus making it more color stable.

Key words: Denture base resin, heat cure materials, color changes,injection moulding