Retaining ligaments of the face and why folds form
Why the ageing face folds at particular lines rather than descending evenly, and what that means for where product should go.
Faces do not sag uniformly. They fold at specific, reproducible lines, and the reason is a set of fibrous structures that tether soft tissue to the skeleton.
The named structures
The zygomatic ligament anchors over the malar eminence. The mandibular ligament attaches near the parasymphyseal mandible. The masseteric ligaments run along the anterior border of masseter. The orbital retaining ligament encircles the orbital rim, and the tear trough ligament runs from maxilla to dermis inferomedially from the canthus.
Some are true osteocutaneous ligaments running bone to skin; others are fascial condensations between deep fascia and SMAS. Functionally they behave the same way — they hold.
What they do
They divide the face into compartments. Where a ligament tethers, tissue stays fixed. Where there is no tether, tissue is free to descend as it loses volume and elasticity.
The result is a crease at every boundary between a tethered zone and a mobile one. The nasolabial fold, the labiomandibular fold, the tear trough and the prejowl sulcus are all the same phenomenon: a fixed line with descending or deflating tissue beside it.
The consequence for treatment
The instinctive move is to fill the crease. It is usually the wrong one. A crease produced by a tether is not a volume deficit, and product injected into it works against a fixed attachment — which produces lumpiness, distortion and a heavier appearance rather than smoothness.
The alternative is to treat the compartment. Restore volume and support above the tether so the tissue is repositioned and the boundary becomes less pronounced. This is also the anatomical logic behind structural lifting: a ligamentous attachment is a fixed point against which small volumes of high-G′ product can act with disproportionate effect.
Some folds resist both approaches, and it is honest to say so at consultation. A strong tether in thin skin will remain visible whatever is done nearby.
Ligaments as landmarks
They are also useful as orientation. The subSMAS spaces are bordered by ligaments, fat, muscle and fascia, and those boundaries define planes that are separated from major neurovascular structures. Knowing where a ligament runs tells you both where product will not spread and where a relatively protected plane may exist.
