The softness and initial flow of temporary soft lining materials.

The initial flow of four temporary soft lining materials was studied with a simple laboratory test procedure, using a parallel-plate plastimeter. The flow in a clinical situation was further investigated, together with a clinical assessment of softness. The results indicate that a 2-mm thickness of temporary soft lining material is considered suitable for use as a tissue conditioner. The thickness of lining material is influenced by the clinical technique and by the powder to liquid ratio; however, the scope for altering the ratio is limited.