I think a lot depends on what kind of tree it was, but odds are in
your favor as long as the cambium is not hurt.

About 1 week ago I had a huge oak tree uproot and fall on a nice Crepe
myrtle which had about a 3" diam trunk. It broke it off about 1 foot
above the ground, but badly scarred the rest of the trees trucnk. I
decided to cut it flush with the ground as I gave it little chance of
amounting to anything again as even the roots etc got torn up pretty
bad. Well against advice given to me by the better half, I cut it as
close to the ground so it was not a stumbling obstacle , and bigger
than life yesterday I looked at it and it has new shoots growing about
1" long already out of that stump......So don;t give up on a leafless
sapling......
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