What is the primary use of a rubber polysulfide impression material?

The primary use of a rubber polysulfide impression material is for taking final impressions for complete dentures (C/C). This material is favored in prosthodontics due to its excellent dimensional stability and ability to capture fine details, which are critical during the impression-taking process for removable prosthetics. The impression must accurately reflect the subtleties of the hard and soft tissues of the oral cavity, ensuring a proper fit for the complete dentures.

While rubber polysulfide can additionally provide fine detail and is sometimes used for crowns, its specific properties make it particularly suitable for complete denture impressions where precision is essential for functionality and patient comfort. Temporary restorations are typically made with different materials, as they serve an entirely differing purpose in dental procedures.