Hi Lahari.

In Government Dental colleges in the state of Andhra Pradesh a cut off score of more than 400 is needed in the SC category. However with a score of 345 you can get the reserved seat in private dental colleges of Andhra Pradesh.

For better insight please check:

https://medicine-careers360-com.cdn.ampproject.org/v/s/medicine.careers360.com/articles/neet-cutoff-ap/amp?amp_js_v=a2&amp_gsa=1&usqp=mq331AQA#aoh=15596166912093&amp_ct=1559616695132&referrer=https%3A%2F%2Fwww.google.com&amp_tf=From%20%251%24s&ampshare=https%3A%2F%2Fmedicine.careers360.com%2Farticles%2Fneet-cutoff-ap

For predicting the most probable college using your score , use:

https://medicine.careers360.com/neet-college-predictor?icn=NEET_clgpd&ici=NEET_text-mapping

Hope this information helps.

Best Wishes!