The Maxilla Recesses With Age

Facial aging is a gradual process that affects all layers of the face: the bones, muscles, fat and the skin. Initially, these components exist in a balanced relationship, giving the face a smooth, firm, and well-supported appearance. Over time this balance begins to break down. Facial muscles either weaken or become overly tense, and fat compartments shrink or shift position. Alongside these soft tissue changes, the bones of the face also undergo important transformations, which significantly influence how aging appears.

For many years, research on facial aging focused mostly on soft tissues and cosmetic corrections. However, more recent studies highlight the crucial role of the facial skeleton. The bones of the face act as a structural framework that supports all overlying tissues. As these bones lose volume and density, this support weakens, contributing to visible signs such as sagging skin, hollowing around the eyes, and deepening facial folds.

One of the most important areas affected by aging is the maxilla, or upper jaw. The maxilla plays a central role in maintaining facial structure because it supports the midface, including the cheeks, nose, the mandible (lower jaw) and the teeth. With age, the maxilla undergoes gradual resorption, meaning that bone tissue is lost.  As the maxilla shrinks, it reduces support for the surrounding soft tissues, leading to common aging features such as deeper nasolabial folds (lines running from the nose to the mouth), under-eye hollows, and a more prominent or elongated nose.

The maxilla is one of the most consistently affected bones during aging, with measurable reductions across different populations. Bone loss is especially pronounced in areas associated with the teeth. Tooth loss accelerates the reduction of bone height in both the maxilla and the lower jaw, further weakening facial structure. This highlights how dental health is closely linked to overall facial aging.

However, an equally important factor influencing maxillary changes is mechanical stress, especially from chewing. Bones adapt to the forces placed on them. When bones are regularly stimulated by strong muscle activity, such as chewing tougher foods, they tend to maintain their strength and density. As people age, muscle strength declines, reducing this stimulation and leading to increased bone loss. This process, known as mechanotransduction, plays a key role in facial bone aging. (Mechanotransduction is a framework of understanding how diminished muscular forces and mechanical loading cause selective bone resorption through a process by which bone cells — specifically osteocytes — sense those physical loads and convert them into chemical signals that lead to remodeling).

Interestingly, research that compared medieval and modern populations found that although the direction of aging changes is similar, the intensity differs. Medieval individuals, who consumed tougher and less processed foods, likely experienced greater chewing forces. As a result, their maxillary bone loss appears to have been slower and less severe than in modern populations, who typically eat softer diets. This supports the idea that lifestyle factors, such as diet, can influence the rate of facial aging.

In addition to the maxilla, other areas like the eye sockets (orbits) and the nasal opening (piriform aperture) also expand due to bone resorption, contributing to an aged appearance. However, the maxilla remains central to the question of age-related facial architecture changes because of its central position and influence on cranio-facial structure.

Overall, facial aging is not just a surface-level process but involves deep structural changes. The maxilla plays a key role, as its gradual loss of height and volume significantly shapes the aging face. Understanding lifestyle factors underlying the changes helps provide a more complete picture of how and why our appearance evolves and what strategies we have to guide it.