- Comparison of an oscillating/rotating electric toothbrush and a 'sonic' toothbrush in plaque-removing ability. A professional toothbrushing and supervised brushing study. Van der Weijden, G.A., Timmerman, M.F., Reijerse, E., Snoek, C.M., Van der Velden, U. Journal of clinical periodontology. (1996)