question about FDA clearance for products already being sold

Hello guys,

I am trying to figure out that if there is any clearance still required from FDA if I start selling any class-1dental or diagnostic devices which are already sold by my sellers in market. If I launch the same devices in market with my brand on it, will they still require me to file a PMA?

Since the devices are same as already sold but they are going to be private label to me.

I consulted FDA knowledgebase but i couldn’t find the specific answer.