We let Teddy straight out into the garden, off the lead.
In fact, he's never really been on the lead yet - and doesn't wear a collar at the moment. (he can-t go out until Wednesday).
As for dental hygiene, we haven't done anything specific - other than give him a stag bar. We've never done anything for our 11 year old lab and her teeth are fine, according to the vet. (she's had bones, dentastixs, and now a stag bar - so natural teeth cleaners).