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.
COMMENT RULES: Comments that are judged to be defamatory, abusive or in bad taste are not acceptable and contributors who consistently fall below certain criteria will be permanently blacklisted. The moderator will not enter into debate with individual contributors and the moderator’s decision is final. It is Belfast Telegraph policy to close comments on court cases, tribunals and active legal investigations. We may also close comments on articles which are being targeted for abuse. Problems with commenting? firstname.lastname@example.org
Don't deny yourself pleasure. It's important to indulge your sensual side. When you don't, you become irritable. Take this opportunity to splash out on new clothes. Soak in a scented bath. Get a massage. Enjoy a long nap. Do whatever your heart desires. If anyone dares complain you aren't working hard enough, maintain a stony silence. You're incredibly intimidating, especially when you're quiet. Anyone who has become too reliant on you needs to be more self sufficient.More