COMPRESSION RESISTANCE OF 4 INTEROCCLUSAL RECORDING MATERIALS

Elastomeric impression materials are popular for making interocclusal records to mount casts on dental articulators. The resistance of these materials to compressive forces is critical, because any deformation during the recording or mounting process could result in inaccurate articulation of casts and faulty fabrication of restorations. This investigation compared the deformation of designated thicknesses (2 mm, 5 mm, 10 mm, and 20 mm) for four elastomeric interocclusal recording materials (Blu-Mousse, Stat BR, Ramitec, and Regisil) when subjected to a 25 N compressive load. Compressive distortions of clinical significance were recorded for all of the materials with various thicknesses. The Blu-Mousse vinyl polysiloxane registration material exhibited the greatest resistance to compression for the designated thicknesses, and these resistance values were significantly lower than those of the other recording materials with thicknesses of 5, 10, and 20 mm (alpha < 0.05).