Boston University offers a 1 year masters program in Oral Health Sciences. Of the 30 credits required to finish the masters, 24 of them are 1st year dental school courses taken at BU dental school. There isn't any information about it on the website yet, because the program just started last year, but you can call the Graduate school and ask about the the MA in Medical Sciences program, concentration in oral health sciecnes. PM me if you have any questions