I really appreciate the fact that you want to continue your studies after marriage. But please check the eligibility criteria for the admission to a dental college because I feel you might not be eligible to take the admission.
Even if you are not eligible for it, I would say that you should continue your studies. You can think and decide anything that matches your interest and go about studying it. There is no age of studying, so doesn’t have doubt in what you are doing and I am sure you will be able to do it.