It sometimes depends on the sensitivity of the detectors… for example, tiny gum wrappers that contain small amounts of aluminum in them can sometimes set off airport security. If your dentures contain any metal (such as a milled bar attachment), or if you have dental implants that contain metal, you may set off security. If you are flying with dentures and the metal detector is triggered when passing through it, don’t panic. This is a fairly common problem and the security staff will likely screen you with a manual detector. If this happens, you can expect a minor delay when going through airport security with dentures.