"I have used Spacemark-D for the last four and a half months and it has proved to be a valuable tool in my routine of interdental brushing. It is easy to use, timesaving and most importantly ensures accurate and efficient use of interdental brushes." - Mrs C W.

"A very clever idea . . . . " - Professor DG - USA.

"Easy to follow and saves me time." - Mrs N H.

"The chart is easy to follow" - Mrs I W.