Jaw alignment disorders can cause a range of problems and often prohibit proper chewing and/or swallowing. Teeth can shift around in the mouth, causing even more discomfort or difficulty. Gum disease and tooth decay are also harder to prevent because proper oral hygiene can be difficult with a malocclusion. TMJ disorder (TMD) can develop over time. Distorted facial shape and unattractive teeth are often the most noticeable and troubling issues for those affected.