Which type of impression material is the easiest flowing of the three forms?

Light body impression material is considered the easiest flowing of the three types due to its lower viscosity. This characteristic allows it to capture fine details and nuances in the oral cavity effectively, making it ideal for creating impressions of the gingival margins and other intricate areas. Its fluid nature enables it to flow into the small spaces and around teeth without excessive pressure, ensuring a precise fit for restorations.

The other types of impression materials are designed with higher viscosities, which influence their flow characteristics. For instance, heavy body impression material is thicker and is often used to provide greater stability and support for the lighter materials. Medium body materials strike a balance but still don’t match the fluidity of light body materials. Putty impression material is notably the thickest and is used primarily for bulk impressions rather than for capturing fine details, which further highlights why light body material is preferred when detail is critical.