Table spoon might work if it would be in sphagnum moss.
In case for bark you want to soak it for few minutes. Or run water through the pot for few minutes untul you see root from gray color turn into green.
You still can try to revive your orchid but it will take few months (my rootless one took about 3 months to start new roots).
The leaves will wrinkle and turn yellow and fall of but it should grew new ones. Just water it enough.
And you need to increase humidity since your plant basically has no roots.
Soak roots in water ( make sure water does not go in crown, where leaves start grow), if you have kelpmax or superthrive, add it according to label. And see if there is any viable roots left. Cut off all dead roots, repot and hope for the best.
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