A dentalmedical instrument is provided for use in diagnostic and related patient inspectionexamination. Light is directed at the surface of the wafer from an optical sensor disposed within the polishing pad. The ion channel modulating compounds may be cycloalkylamine ether compounds, particularly cyclohexylamine ether compounds. The variable stress system is operable to control at least one of temperature or pressure applied to the sample cement composition in the annular test chamber during and after curing of the sample cement composition. The interlayer for laminated glass and the laminated glass according to the present invention can offer excellent privacy protection.