Data Rec0very with Inconsistent Backups

Hi ALL!
just lost an OJS 3.1.0 install (disk failure). The database is current to the time it failed, but the files directory backup is from March. I also have a database dump from March.

If I restore the database from March, everything will be consistent but April/May’s work will be lost.

Is that my only option? Can someone help me understand the extent of the damage, i.e. what data have I really lost?