I Suppose if the tree is healthy enough it will heal all by itself. Inspect if there are any "torn" parts with loos fringes. If there are, cut these off so the tree is left with a smooth neat wound.
The experts are rather divided on the issue of using wound balm. If the tree is in a rather humid shady spot you could use one with an integrated fungicide...
I hope the tree will heal well soon. :-\