I had clear margins and yes, you can definitely give a sigh of relief. I don't know your husband's numbers but with negative margins, and assuming no involvement in the lymph nodes or seminal vesicles, he should expect an undetectable PSA hopefully forever. However, in a minority of cases, the PSA may begin to rise after some time, which could be 5 years or more. In my case I've gotten a small rise after 18 months, and am back watching my PSA. So he's not out of the woods yet (none of us are) but negative margins is the first major hurdle. Congratulations!
PSA: 7 tests over 2 years bounced around from 2.6 to 5.6
Biopsy 8 of 12 positive, Gleason 3+4, T2a
DaVinci August 2009, pathology Gleason 4+3, neg margins, T2c
Continent right away, ED
Viagra, Cialis did't work, Trimix works well
3, month: undetectable <.1; 6 month: undetectable <.014 (ultrasensitive); 9, 12, 15 month: undetectable <.1; 18 month detectable .05