A script of ours had an error that caused some pages we didn't wish 410'd to be 410'd, we caught it in about 12 hours but for some pages it was too late.

My question is, will those pages be reindexed again and how will that affect their page ranking will they eventually be back where they were?  Would submitting a site map with them help, or what would be the best way to correct this error (submit the links to google indexer maybe?).