1. Dental Spending Hits $37 Billion. Am Dent Assoc News, Jan. 6,1992
2. Hein, J. The industrial contribution to safe and effective dentifrices. Community Dent Oral Epidemiol 1980;8:230–236
3. Fischman, SL. “Hare’s teeth to fluorides, historical aspects of dentifrice use.” In Clinical and Biological Aspects of Dentifrice, G. Emery and G. Rolla, ed. Oxford University Press, 1972;1–7.
4. Harris, NO. “Dentifrices, Mouthrinses and Oral Irrigators.” I. Primary Preventive Dentistry. N.O. Harris and A.G. Christien, ed. Norwalk, CT: Appleton and Lange, 1991; 141–147.
5. Addy M, Moran J, Griffiths AA, Wallis-Wood NJ. Extrinsic tooth discoloration by metals and chlorhexidine. 1. Surface protein denaturation of dietary precipitation? Br Dent J 1985;189:281–285