For oral sex on women, no way (this is the main thing I've missed when I haven't had a female partner, and the taste issue again). For women, it looks like there's nothing you can realistically catch from receiving.
For rimming, yes, it's dam time. Put some (warm) lube on the receiver's side and use cling film.
Apart from that, deeply cynically, I think the main use of dental dams is to enable the lesbian community in places like the US to deny the real health risks: smoking, sex with men and IV drug use.