mysweetsmile tooth powder - better than dentist teeth whitening trays>

[ZonkedOutwithPainMeds]

Has anyone for whom teeth whitening trays you use at home (bought from a dentist) didn't work had any success with mysweetsmile tooth powder?

All this powder is is very expensive calcium carbonate (chalk) , it will not whiten but if brushed on teeth may wear away stain and also enamel.