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Ab s t r Ac t Aim and objective: To evaluate and compare the surface roughness of two polyvinylsiloxane impression materials following ultraviolet irradiation and chemical disinfection. Materials and methods: The surface roughness of two different polyvinylsiloxane impression materials (Elite HD+ and Aquasil) were evaluated following ultraviolet irradiation and chemical disinfection using a surface profilometer. Sixty specimens of each impression material were fabricated and divided into one control two experimental groups. The mean surface roughness values among the treatment groups were recorded and subjected to the statistical analysis. Results: Both the materials showed a statistically significant increase in the surface roughness values following ultraviolet irradiation and chemical disinfection. In general, the control groups presented the least surface roughness and the chemical groups presented the maximum surface roughness values. Conclusion: Ultraviolet irradiation sterilization of polyvinylsiloxane elastomeric impression materials resulted in a lower surface roughness and hence may be preferred over chemical disinfection.

international journal of experimental dental science

An In Vitro Study to Compare the Surface Roughness of Two Polyvinylsiloxane Impression Materials Following Ultraviolet Irradiation or Chemical Disinfection