According to E! News, the actor's mouth had to be wired shut after the accident at the weekend.
He slipped at the entrance of his LA home in a puddle of water.
E! News said that the former High School Musical star star, 26, also suffered a gash and was given stitches but that he is expected to make a full recovery.
The schedule to promote his new comedy That Awkward Moment has apparently been put on hold.
Zac recently spent time in rehab.
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