Which impression material requires a separate adhesive for tray application?

Polyether impression material requires a separate adhesive for tray application due to its unique chemical composition and properties. This material is highly viscous and has a tendency to have low adhesion to most tray materials. To ensure a reliable and accurate impression, an adhesive is needed to create a strong bond between the impression material and the impression tray, preventing dislodgement or distortion during the impression-taking process.

The adhesive specifically formulated for polyether enhances the interaction between the tray and the material, promoting uniform distribution and minimizing the risk of bubbles or voids in the impression. The need for an adhesive distinguishes polyether from other impression materials, which may not require this additional step for effective use. This characteristic makes it important to recognize the adhesive requirement when working with polyether to achieve optimal results.