Proceedings of the European Workshop on Mechanical Plaque Control :  status of the art and science of dental plaque control ; Castle of M�unchenwiler, Berne, Switzerland, May 9-12, 1998 /  supported by an educational grant from Oral-B Laboratories, Belmont, California ; edited by Niklaus P. Lang, Rolf Attstr�om, Harald L�oe.   - Chicago ;  London :  Quintessence,  1998.   - 314 p. :  ill., ports ;  24 cm.