Strong adhesives often contain ingredients that are unsafe for consumption. Super glue contains cyanoacrylate, a poisonous substance that can cause irritation and bonding of sinus and throat tissues if swallowed, according to MedlinePlus.
Using glue to repair a broken tooth can be hazardous, but there are steps that can be taken to preserve a broken tooth until a dentist is available. Taking an over-the-counter pain reliever and then rinsing the mouth with salt water decreases the risk of infection, recommends WebMD. Retailers such as Target, Walmart and Amazon.com stock dental repair kits that contain dental wax to cover the fractured tooth and protect it until a dentist can be seen.