The answer to this question depends on your individual circumstances. A 21 out of 30 is considered a good score on the DAT Exam, but it may not be enough for certain programs. Generally, the higher your PAT score, the better you'll look when applying to dental schools. However, some programs place less emphasis on the PAT than others, so you should still consider the specific requirements of the program before making a decision. Additionally, even if your PAT score is not as high as you would like, other aspects of your application may be strong enough to make up for it. Ultimately, you should seek advice from a dental admissions expert who can assess your entire profile and provide personalized guidance on how best to proceed. With the right information and support, you can maximize your chances of getting accepted into a dental school program.