Glass ionomer cement was introduced by Wilson and Kent in:

 # Glass ionomer cement was introduced by Wilson and Kent in:

a.1969

b.1972

c.1896

d.1989

The correct answer is B. 1972.

Glass ionomer cements are adhesive tooth colored anticariogenic restorative materials which were originally used for restorations of eroded areas. Current glass ionomers have been modified to allow a wider application. These cements evolved from a general dissatisfaction with silicate cements. The first usable glass ionomer system was formulated in 1972 by Wilson and Kent and was known as ASPA (alumino silicate polyacrylic acid). Subsequently great improvements were made and today these materials are very popular and widely used.