Effect of Commonly Consumed Beverages on Color Stability of Polymethyl Methacrylate Denture Base Material.

Color change of prosthodontic materials may result in patient dissatisfaction and additional expenses for replacement. This study aimed to determine the effect of daily-consumed beverages (tea, coffee, and Pepsi®) on the color stability of two types of heat-cured acrylic resin denture base materials (Hiflex-H and DPI® Heat Cure). A total of 136 disc samples were prepared as per manufacturer instructions and divided into two main groups of 68 discs of each type (20 mm ± 0.

Does 6 Hours of Contact With Alginate Impression Material Affect Dental Cast Properties?

Alginate impression (irreversible hydrocolloid) material is commonly used in dental practice because it is easy to mix, low in cost, and well tolerated by patients. The material is not dimensionally stable, however; thus, it is necessary to pour the impression immediately after the molding is accomplished, or within 60 minutes if the impression is kept in 100% humidity. Excessive contact of the alginate impression with the cast model over time may affect the model's properties.