I read about Apa White Duo at home whitening kit last year. Does anyone know if it works as well as in-office whitening or at-home whitening trays? What is the cost and how often do you have to do it?
I read about Apa White Duo at home whitening kit last year. Does anyone know if it works as well as in-office whitening or at-home whitening trays? What is the cost and how often do you have to do it?