I don't think your GPA is much of an issue since it seems right around the average, maybe a smidgen under. What does your dental experience look like? If you have a lot under your belt already, I don't think working in a dental lab is necessary unless you really want to and/or need it. What does need improvement is your DAT score which you are already aware. Now it's just a matter of which option can allow you more time to focus on the DAT? Also, have you even scoped out for any dental related job listings yet, or is this all hypothetical? Looking for dental jobs isn't easy (take it from me), especially if you don't have any certification for a lot of things. Many months ago, I tried looking for any job offerings I could find on Craigslist around my area as a dental assistant, and my search was unsuccessful because I wasn't qualified for many (i.e. at least 2 years experience, x-ray certification, know how to use specific computer software, etc.). I imagine dental lab technicians may also need some sort of previous experience to permit interviews, so I would suggest researching for job offerings first to see if it's plausible before you even think of ditching the Master's route because at least a Masters will give you something to fall back on.