Table 3.

Papers excluded

Reference	Year	Authors	Journal	Reason
19	1991	Vissink et al	J Oral Pathol Med	Animal study
70	1998	Davies	Br Med J	Editorial
46	1998	Spielman	J Dent Res	Animal study
51	2000	Kuntz et al	Int J Pharm Compound	Opinion paper
3	2005	Waltimo et al	Schweiz Monatsschr Zahnmed	Article in German