Table 4.

Characteristics of Potassium containing toothpastes included studies.

No.	Study	Methods	Participants	Interventions	Outcomes	Results
1	Nagata et al. [100]	12 weeks, parallel, double-blind, randomised	36 completing out of 36	5% KNO3 versus 0% KNO3	Tactile, air blast, and subjective	5% KNO3 > control (P, 0.05) at 4, 8, and 12 weeks
2	Schiff et al. [101]	12 weeks, parallel, double-blind, randomised	58 completing out of 67	5% KNO3 and 0.243% sodium MFP versus 0% KNO3 and 0.243% sodium MFP	Thermal, tactile, air blast, and subjective	Test > control (P < 0.01) at 6 and 12 weeks
3	Schiff et al. [102]	8 weeks, parallel, double-blind, randomised	39 completing out of 48	5% KNO3 and 1500 ppm MFP versus 0% KNO3 and 1500 ppm MFP	Tactile and air blast	5% KNO3 > control (P < 0.0001) at 4 and 8 weeks
4	Schiff et al. [103]	8 weeks, parallel, double-blind, randomised	80 participants	5% KNO3 and 0.243% NaF versus 0.243% NaF	Tactile and air blast	5% KNO3 > positive and negative controls (P < 0.05) in tactile and air blast sensitivity, at 4 and 8 weeks
5	Silverman et al. [104]	8 weeks, parallel, double-blind, randomised	110 completing	5% KNO3 versus 0% KNO3	Tactile, cold air, and subjective	5% KNO3 > +/− F > F control at 4 and 8 weeks (P < 0.02); NS between 10% Sr Cl2 and control; 5% KNO3 > +/− F > 10% Sr Cl2 at 8 weeks (P < 0.05)
6	Sowinski et al. [105]*	8 weeks, parallel, double-blind, randomised	67 completing	5% KNO3 and 0.243% NaF versus 0.243% NaF	Tactile and air blast	KNO3 > control significant improvements in tactile and air blast at 4 and 8 weeks

 *Product withdrawn from the market.