The face does not age as a single surface. It ages as a layered structure, and each layer changes on its own timeline. A useful way to picture it, used in plastic surgery and dermatology teaching, is five overlapping layers from deep to superficial: bone, deep fat, retaining ligaments and the superficial musculoaponeurotic system (SMAS), superficial fat, and the skin itself. The visible result we call ageing is the sum of changes across all five.
Understanding the architecture matters because the most common cosmetic mistakes come from treating the wrong layer. A line that looks like a skin issue is often a volume issue. A jowl that looks like skin laxity is usually a ligament and deep-tissue issue. Treating only what is visible, without an account of what is underneath, leads to results that age poorly even when each individual treatment was technically well done.
Layer one: the facial skeleton
The facial skeleton remodels throughout adult life. Imaging studies have documented progressive resorption at the midface, expansion of the orbital aperture, recession of the maxilla and loss of anterior chin projection. The mandibular angle becomes more obtuse and the pyriform aperture around the nose widens. Soft tissue that used to drape over a fuller skeletal frame now drapes over a smaller one, contributing to the appearance of descent even when the soft tissue itself is intact.
Layer two: the deep fat compartments
Facial fat is organised into discrete compartments rather than a uniform sheet. The deep fat, particularly in the midface, provides structural support to everything above it. Anatomical work by Rohrich and Pessa and subsequent imaging studies have shown that the deep medial cheek fat tends to atrophy with age. The loss of this hidden cushion produces a tired, hollow appearance long before any wrinkle becomes prominent.
Layer three: ligaments and SMAS
The retaining ligaments of the face anchor skin and soft tissue to deeper structures. With time, these ligaments attenuate and the superficial musculoaponeurotic system descends. The result is migration of tissue inferiorly, deepening of the nasolabial and labiomandibular folds, and the formation of jowls. This is mechanical, not cutaneous. Topical care will not address it.
Layer four: superficial fat
Superficial fat sits above the SMAS and gives the face its surface contour. It does not change uniformly. In some patients, superficial fat in the lower face hypertrophies, contributing to heaviness along the jawline. In others, the upper-face superficial fat thins, exposing underlying structure. The pattern is individual and partly genetic.
Layer five: the skin itself
Skin ageing is more than wrinkles. Dermal collagen and elastin decline, the basement membrane flattens, microvasculature thins and pigment becomes uneven. Photoageing, driven primarily by ultraviolet exposure, accounts for the majority of visible facial ageing in lighter skin types according to long-standing dermatology literature. In the Australian climate, this layer carries an outsized share of the visible change.
The face ages downward, then inward, then on the surface. Most treatments work in the opposite order.
Why the order of change matters clinically
Structural changes typically begin in the 30s, become visible to the patient in the 40s, and dominate the appearance by the 50s and beyond. Surface wrinkles arrive on top of, not instead of, this structural shift. A plan that treats only wrinkles will improve photographs taken at one moment in time and will not change the face's trajectory. A plan that respects the underlying architecture has a chance to do both.
What a layered assessment looks like
- · Examination of bony landmarks: orbital rim, malar projection, mandibular angle, chin projection.
- · Mapping of volume change across the deep and superficial fat compartments, not only where the patient sees a line.
- · Assessment of ligamentous descent and its contribution to jowling and folds.
- · Skin quality assessment: pigment, vascular pattern, texture, hydration, elasticity.
- · Dynamic and static line assessment in repose and on animation.
What this means for treatment philosophy
An evidence-led approach addresses the deeper layers first, conservatively, and brings surface work in last. Categories that may be considered, always after medical consultation, include bio-remodelling and bio-regeneration to support dermal quality, volume replacement treatments used in modest volumes to restore lost compartments rather than to fill lines, calcium hydroxylapatite or poly-L-lactic acid biostimulators for selected indications, and energy-based devices for skin tightening. When the dominant change is ligamentous descent or significant skin redundancy, the honest answer at consultation is often referral to a specialist plastic or facial surgeon for assessment.
All cosmetic procedures carry risks. Outcomes vary between individuals. A consultation with a registered medical practitioner is required prior to any treatment. This article is general information only and is not medical advice.