Instead of just one year, mine is a 2 year long program, which can be accelerated as just one year for medical students, but I am doing it for 2 years while doing research and volunteering for the community. I am starting my Master's in Public Health in this fall and the program is supposed to be done in 2015 Spring and I will be applying for dental schools in 2014 summer so that once I finish my Master's, I can start the dental school in the fall of 2015.
If you are applying for this cycle though, I am wondering whether your grades in the fall for your MPH will be transferred. I thought the interviews usually begin from July to December and you usually get the grades by late December or early January. But I am not an expert though. Good luck!