Do bird beaks grow back like a toe nail.?

My birds bottom beak broke half way off ,just fell off.Will it grow back . no bleeding or nothing .Seems to be fine with out it but need to know if it will grow back like her toe nails or what.Robin bird.Please help ! If not what can you do. Thank you so much
Update: Has bird pox and medication must have dried it up.Had a fungus growing on bottom and top beak.Id say medication did it.The top looks like it may do the same ,but its not the whole beak,like midway.
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