Evaluation of Dimensional Stability and Surface Hardness of Interocclusal Recording Materials at Various Time Intervals: An in vitro Study

AIM: At different timings, assessment and comparison of the dimensional stability and surface hardness of three interocclusal recording materials (IRM). MATERIALS AND METHODS: Samples of polyvinyl siloxane, ZOE, and bite registration wax were made using stainless steel die. Each group had 10 samples. At 1, 8, 24, and 48 h, the samples were estimated using a 10× amplification stereo microscope. RESULTS: Four readings were taken for each sample, the mean was considered to scale the dimensional change and surface hardness. At 1, 8, 24, and 48 h mean dimensional change was viewed as the most extreme among group 3 followed by group 2 and afterward group 1 (P < 0.05). CONCLUSION: Polyvinyl siloxane was the steadiest, most precise, and had the most noteworthy surface hardness among the three interocclusal materials.