Tehmina Asad, Asad Tareen.
The effects Of various disinfectant solutions on surface hardness of Shellac Base Plate Material.
Pak Oral Dental J Jan ;22(2):181-4.

There is an increasing awareness of the importance of cross-infection control in dental clinics and laboratories. It is recommended that at every stage of prosthesis fabrication the components should be disinfected. The purpose of this study is to evaluate the effects of some commonly used disinfecting solutions on the surface hardness of shellac base plate material in relation to the length of immersion time. Hardness was measured as resistance to indentation following the method specified by the British Standards Institute. The results demonstrated that immersion disinfection of shellac-base plate material up to three hours did not reveal any significant change in its hardness values.

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