If you have no backups then you very likely have lost any data that was in those tables. There are no magic recovery tricks, if the tables are gone, they're gone and the only way to get them back would be to restore a backup.
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)SQL In The Wild
: Discussions on DB performance with occasional diversions into recoverability
We walk in the dark places no others will enter
We stand on the bridge and no one may pass