[quote=@pyroman]
Follow up question, do the previous dental series's have ranger counterpart universes to? Namely battle fever J and JackQ?
[/quote]

Sentai seasons exist as universes shown in the tv show. For example Kyu and Deka are in separate universes.

As for Sentai seasons that were not made into Power Rangers, if they showed up in Mega Force as one of the [url=http://powerrangers.wikia.com/wiki/New_Powers]New Powers[/url] they exist as a separate universe from the main TV show universe like RPM or SPD.