Hi as per your query I would like to tell you that your marks are too low to get you a seat in a college for mds . Plus NEET PG and NEET MDS are two different exams conducted once every year in which NEET PG is for getting seat in MD/ MS etc which aspirants can go for only after doing MBBS whereas NEET MDS is for dental aspirants who wants to pursue post graduation in their field which is MDS. You have not mentioned your category either , nevertheless The minimum qualifying percentile of NEET MDS 2020 for general category is 50th percentile with 286 as the equivalent scores, while for SC/ST/OBC aspirants, the cutoff percentile is 40th with 250 scores equals to it. For second round the percentile went down to 220 for general category , 188 for SC/ST / OBC AND 204 for gen -pwd so it's better for you to keep studying and apply next year for the exams .
To know more about neet mds click below
https://www.google.com/amp/s/medicine.careers360.com/articles/neet-mds-cut-off/amp
Hope this helps

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