I would just give it normal care and watch it. Especailly the areas where the branches where cut. If they start to get diseased and rotty looking, you may have an issue.

I don't have an orange tree, but I remember my neighbor used to give hers a heavy pruning every year and she'd cover the "cut" marks with some type of sap or tar or something...

It's still fairly early in the year, good chance things will go good for the tree...

Good luck!