To compare and evaluate the dimensional stability and accuracy of various interocclusal recording materials: an in vitro study

Aim: To compare and evaluate  the accuracy and dimensional stability of aluwax (AW), zinc oxide eugenol (SB), bisacryl (LB), polyvinylsiloxane (DB and CB) and polyether(RT) as bite registration materials at different time intervals (on first day, third day and seventh day).
Materials and methods: A Stainless steel mold was made according to revised American dental association specification no.19 and 60 samples were prepared according to different manufacturers instructions. The samples were observed for accuracy and dimensional stability on day 1, day 3 and day 7 under Nikon Profile Projector. The data was collected and statistically analyzed.
Results: There was a statistically significant difference in accuracy scores among various groups (p<0.001). Highest mean accuracy score i.e. surface detail reproduction was shown by Superbite followed by Luxabite, Ramitec = DMG O bite, Cad bite with least accuracy score of Aluwax. Superbite was least dimensionally stable followed by Luxabite, Aluwax, Ramitec, DMG O bite with lowest mean difference in Cadbite suggesting it to be most dimensionally stable.
Conclusion: Zinc oxide eugenol bite registration paste (SB) was found to be most accurate Polyvinylsiloxane bite registration paste (CB) was found to be most dimensionally stable even after 7 days.