Improving the appearance or function of the maxilla (upper jaw and midface) comes down to what can actually change bone versus what only affects posture, muscle tone, or appearance. The most effective options are medical and orthodontic treatments. Braces or clear aligners can improve bite and upper jaw positioning, palatal expanders can widen the upper jaw (most effective when started young but with limited adult benefit), and orthognathic jaw surgery is the only method that can truly reposition the maxilla in adults. Surgery combined with orthodontics is considered the gold standard for real structural change. Proper tongue posture, often called mewing, involves keeping the tongue flat against the roof of the mouth, teeth lightly together, lips closed, and breathing through the nose. In adults this will not dramatically move bone, but it can improve facial posture, support jaw alignment, and help prevent further recession. Breathing and posture also matter: nasal breathing, treating chronic congestion or structural nasal issues, maintaining good neck and head posture, and avoiding face-down sleeping can all support better facial balance over time. Chewing and muscle balance have only a minor impact; light, balanced chewing such as sugar-free gum can improve muscle tone but will not change bone structure. Body fat levels affect appearance only, as a leaner face can make the cheekbones and maxilla appear more prominent without altering the bone itself. Many popular claims should be ignored, including hard chewing devices, extreme mewing promises, face yoga claims of bone growth, and jaw trainers marketed as bone-changing tools for adults. In short, real maxillary change requires orthodontic treatment or surgery, tongue posture and posture habits are supportive but not transformative, and leanness mainly improves visual definition.
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