Not at all. However, if you lost your teeth due to an ongoing “illness” this would disqualify your application, simply because you are in constant contact with people. However, they seek individuals who are smart in appearance, have good customer relations, preferably have some sort further education. A second or third language. There is also a maximum height requirement as well, as if one is over 6.2ft moving around a cabin could be difficult as is if one is too short (reaching) to luggage area above seats. Airlines used to demand a certain body weight too, however this was decided to be discrimination. So if you have dentures but are in good health and can more or less meet the requirements above you have a good chance of acceptance.