University of Khartoum

The Effect of Beverages on Colour Stability of Methyle Methacrylate Denture Base Material

The Effect of Beverages on Colour Stability of Methyle Methacrylate Denture Base Material

Show full item record

Title: The Effect of Beverages on Colour Stability of Methyle Methacrylate Denture Base Material
Author: Babikir, Mohamed Osman
Abstract: Background: Colour change of prosthodontics materials may result in patient dissatisfaction and additional expenses for replacement. This study aim to determine the discolouring effect of daily consumed beverages like (tea, coffee & pepsi) and the colouring stability of two types of acrylic resins denture base material. Materials and Methods: A sample of 136 discs, 68 discs of each type of acrylic resin (20 mm diameter, 3 mm thick - ±0.1 mm), were prepared according to manufacturing recommended mixing ratio and stored in distilled water for 24 hours. Each specimen was immersed in tea, coffee, pepsi and distilled water as a means of control. By scanning the specimens discs (computer analysis), 3 times after: 0 day (T0) -15 days (T1) - and 30 days (T2). The International Commission on Illumination (CIE) was used to determine the mean colour differences (ΔE). Results: The most colour change was apparent with tea after 30 days - mean colour change T0T2 - (ΔE = 39.205) (P= 0.05), when compared to specimens stored in distilled water (ΔE = 1.43) (P= 0.05). DPI Heat Cure acrylic resin material showed more colour change over Hiflex H acrylic resin. When computing colour change (ΔE) to NBS (National bureau of standard) appreciable to very much change in colour were apparent with staining beverages (tea, coffee and pepsi) compared to slight and noticeable colour change with distilled water (means of control). Increasing the time of the experiment, lead to increased in the change of the mean color (ΔE). Conclusion: Tea immersion showed the greatest colour changes (very much change in colour according to NBS) followed by pepsi and coffee. Increased the immersion period increased the staining result.
URI: http://khartoumspace.uofk.edu/123456789/26584


Files in this item

Files Size Format View

This item appears in the following Collection(s)

Show full item record

Share

Search DSpace


Browse

My Account