Soft denture liners are an important treatment option for patients who have chronic soreness associated with their prostheses. Soft denture liners provide a cushion for the denture-bearing mucosa, and this provides comfort for patients.
There are, however, many defects appearing in long-term use in clinics such as a color change, degradation, surface roughness, lack of resiliency, and peeling-off from acrylic resin.
The objective of this study was to analyze the relationship between the physical and mechanical properties and color change of soft lining material. The liner selected for this study was condensation RTV silicone rubber material. Tests were made on samples that were stored in 37°C saline and instant coffee for 1, 2, 3, 4, 12 and 24 weeks before testing.
1. The cause and effect relationship of the degree of color change and physical properties of condensation RTV silicone rubber material was not apparent.
2. It was considered that the physical and mechanical properties for soft liner were influenced by acidity of solutions.
3. It seemed that the relationship between color change and degeneration of soft liners should be analyzed under a bacterial environment in the future.