At what temperature should the fusion of impression compound occur?

The fusion of impression compound should occur above mouth temperature. This is important because impression compounds are designed to be thermoplastic materials that can become moldable when heated. Mouth temperature typically ranges around 37 degrees Celsius (98.6 degrees Fahrenheit), which is not sufficient to melt the impression compound properly for it to conform to the dental structures and achieve an accurate impression.

Heating it above mouth temperature ensures that the compound can flow and adapt effectively. This is crucial for capturing fine details and achieving an accurate fit, which ultimately supports better outcomes in dental procedures, like making crowns or dentures. By using a temperature setting that exceeds mouth temperature, clinicians can ensure that the impression material remains pliable and can accurately replicate the oral structures during the impression-taking process.