To say that teeth were designed to last a lifetime is absurd. If that were true, then there would be no need for dentists. From time to time teeth are lost due to various reasons – decay, periodontal disease, or accidents. Not everyone can afford or are a candidate for implants, so a partial or complete denture can be fabricated very easily and quickly. Some dentures can be fabricated using newer, nylon denture base materials which is flexible, aesthetic and lighter than traditional acrylic. Going without teeth in unnoticeable areas of your mouth is not a good idea.