GS Glass stopper, open at the top to allow access of the light guide of the light source. (LS)
S Sample positioned underneath the glass stopper.
M Micrometer screw for calibration.
C Coil with core inside the glass tube, floating on the mercury, connected to an electronic device (AMP) and computer.(PC).

A typical example

Literature

Feilzer, A.J., Dooren, L.H., de Gee, A.J. & Davidson, C.L. Influence of light intensity on polymerization shrinkage and integrity of restoration-cavity interface. Eur J Oral Sci 103, 322-6 (1995).

de Gee, A.J., Davidson, C.L. & Smith, A. A modified dilatometer for continuous recording of volumetric polymerization shrinkage of composite restorative materials. J Dent 9, 36-42 (1981).

de Gee, A.J., Feilzer, A.J. & Davidson, C.L. True linear polymerization shrinkage of unfilled resins and composites determined with a linometer. Dent Mater 9, 11-4 (1993).

Bausch, J.R., de Lange, K., Davidson, C.L., Peters, A. & de Gee, A.J. Clinical significance of polymerization shrinkage of composite resins. J Prosthet Dent 48, 59-67 (1982).