Unit 3 · Decade by decade
The clinical question changes with each decade, not only its answer
Ageing is continuous, but reading it in decades makes the trajectory visible. This unit asks you to compare adjacent decades rather than read them in sequence, because what changes between them is not merely severity — it is which tissue is driving the presentation and whether restoration is still the right instrument.
Framing
Six decades, one trajectory
Ageing is continuous, but clinically it is useful to conceptualise it in decade-based stages.
The selector below carries the characteristic changes across skin, fat and bone at each decade, together with the treatment profile that typically accompanies it. Read any single decade and you have a description. Move between two adjacent decades and you have the clinical insight — the changes that accelerate, the changes that begin, and the point at which the practitioner’s question changes shape.
The 20s
Peak facial architecture
Skin
- Peak collagen density, Type I and Type III
- High elastin content — excellent recoil
- Robust HA production; plump, hydrated dermis
- Surface smooth; dynamic lines resolve fully at rest
- Late 20s: first visible signs of UV exposure in Fitzpatrick I patients
Fat and bone
- All fat compartments full and well positioned
- Malar eminence strongly supported — the ogee curve is visible
- Facial skeleton at maximum density
- Periorbital area smooth, with no hollowing
- Jowl fat contained superior to the mandibular border
Predominantly BTX-A for dynamic lines. Volume restoration is rarely indicated. The focus is skin quality maintenance and assessment of early genetic ageing patterns.
The 30s
Early volume shift
Skin
- Collagen declining about 1% per year since the mid-20s — a 5–10% net loss
- First glabellar and lateral canthal lines becoming semi-static
- Early photoageing visible in lighter Fitzpatrick types
- Skin still rebounds well; elastin largely intact
Fat and bone
- Early SOOF thinning; the periorbital area begins to separate from the cheek
- Tear trough becoming perceptible
- Nasolabial fold deepening as the nasolabial fat begins its descent
- Malar eminence still prominent but showing early flattening
- Bony change minimal; orbital expansion begins in the late 30s
BTX-A for dynamic lines. Conservative volume restoration: periorbital work at the tear trough and SOOF, and early medial cheek support. Skin quality optimisation. Prevention is still the primary strategy.
The 40s
Mid-face descent begins
Skin
- A 15–20% collagen deficit from peak; thinning is palpable
- Static rhytids now present in the glabellar and perioral areas
- Recoil declining; skin slower to spring back
- Perioral lines — earlier in smokers, present in all patients by the mid-40s
- Significant UV damage visible in Fitzpatrick I–III
Fat and bone
- Malar fat pad descent; loss of ogee curve definition
- DMCF thinning and mid-face flattening
- Nasolabial fold well established, with a prominent ligamentous component
- Jowl fat beginning to descend below the mandibular border
- Orbital expansion of bone; periorbital hollowing more pronounced
- Maxillary anterior wall begins retracting in women
Volume restoration becomes the primary focus: deep medial cheek at the DMCF plane, malar support and periorbital work, with BTX-A for the ongoing dynamic component and skin quality treatment as an adjunct. Treatment planning requires full facial assessment — isolated area treatment often produces suboptimal results in this decade.
The 50s
Significant structural change
Skin
- Post-menopausal women: 30% or more collagen loss in the first five years post-menopause
- Skin visibly thinning; perioral rhytids well established
- Elastin severely degraded; skin drapes rather than recoils
- Significant skin laxity in the neck and lower face
- Photoageing effects substantial; pigmentation changes common
Fat and bone
- Significant deep fat atrophy in the DMCF and deep temporal compartments
- Orbital expansion marked; periorbital hollowing prominent
- Maxillary retraction substantial; mid-face projection lost
- Buccal fat shows a paradoxical increase relative to atrophied neighbours
- Jowl fat well below the mandibular border
- Mandibular border becoming irregular
This decade often requires a structural approach: deep periosteal restoration to address the skeletal support deficit before superficial compartment treatment. Patients treated superficially only often show poor longevity and risk tissue displacement. The question is no longer where the wrinkles are, but what structural support is missing.
The 60s
Advanced skeletal remodelling
Skin
- Marked skin laxity; elastin largely non-functional
- Deep static rhytids across all zones
- Skin can no longer redrape following volume restoration — risk of displacement
- Neck skin laxity significant; platysmal banding visible
- Solar lentigines and pigmentation prominent
Fat and bone
- Severe deep fat atrophy throughout the face
- Orbital expansion marked; eyelid changes prominent
- Marionette lines well established, both ligamentous and gravitational
- Buccal fat descent contributing to lower face heaviness
- Mandibular resorption; chin projection reduced
- Platysma prominent; supporting structures weakened
Many patients in this decade benefit from a combination approach that includes surgical assessment. Volume restoration alone cannot address significant skin redundancy. A frank, structured conversation about achievable outcomes — and about the role of surgical options — is part of the clinical consultation, not an admission of treatment limitation.
The 70s
Significant volume depletion
Skin
- Severe skin laxity, with redundancy in the lower face, neck and decolletage
- Collagen density critically low; skin paper-thin in some areas
- Skin can no longer accommodate volume restoration without displacement
- Extensive photoageing; fragile perioral and periorbital skin
Fat and bone
- Advanced skeletal resorption throughout the facial bones
- Profound fat atrophy; the face is markedly deflated
- Pre-jowl sulcus prominent; mandibular border irregular
- Temporal hollowing often pronounced
- Neck: platysmal bands prominent, submental volume variable
Many patients in this decade are beyond the threshold for meaningful volume restoration outcomes alone. Skin redundancy exceeds the tissue capacity to redrape, and surgical consultation is often the primary recommendation. Selective conservative restoration can complement surgical outcomes or address specific isolated concerns in appropriate candidates.
Move between decades with the tabs, the arrow keys, or the step controls in each panel. The comparison between adjacent decades is the clinical content of this unit.
Predict · The 50s
One compartment appears to grow while everything around it shrinks
Deep fat atrophy in the 50s is substantial across the DMCF and deep temporal compartments. Against that, the buccal fat reads as fuller than it did a decade earlier.
Deep fat is atrophying throughout the face in this decade, yet the buccal compartment appears to have increased. What is actually happening?
Hold your answer before you open this. The value is in having committed to a mechanism first.
The increase is paradoxical and relative: the buccal fat appears larger against neighbouring compartments that have atrophied around it. By the 60s its descent contributes to lower face heaviness.
The lesson generalises. In a face where several compartments are losing volume at different rates, apparent fullness is frequently a comparison rather than a measurement. Reducing a compartment that only looks full is a difficult error to reverse.
Post-menopausal women lose approximately what proportion of their dermal collagen in the first five years after menopause?
Select an option to commit. The reasoning appears afterwards.
Approximately 30% of dermal collagen is lost in the first five years post-menopause — around three times the rate of chronological ageing — driven by the withdrawal of oestrogen’s direct stimulation of fibroblast activity.
This is why the 50s so often present as a step change rather than a continuation. A patient seen at 48 and again at 54 has not simply aged six years, and treatment planning that assumes a linear trajectory will underestimate what has happened to her skin quality in the interval.
Learn · The shape of the trajectory
What changes between the decades
Placed side by side, the six decades describe three different clinical problems rather than one problem of increasing severity.
In the 20s and 30s the practitioner is asking where the lines are. By the 70s the question is something else entirely. Across the six decades, what is it that changes?
Hold your answer before you open this. The value is in having committed to a mechanism first.
In the 50s the question stops being where the wrinkles are and becomes what structural support is missing. By the 60s and 70s it becomes whether the skin can redrape over restored volume at all — and where it cannot, restoration displaces tissue rather than lifting it.
Prevention, structural restoration and threshold judgement are three distinct clinical modes. A practitioner applying the first to a patient who needs the third will treat diligently and produce a heavier face.
The transition points are not sharply age-bounded. Orbital expansion begins in the late 30s, maxillary retraction begins in women in the 40s and becomes substantial in the 50s, and mandibular resorption is a feature of the 60s onward. Two patients of the same chronological age can sit either side of a transition, which is why the decade framework is an assessment scaffold and not a treatment protocol.
A woman of 54 presents with mid-face flattening, marked periorbital hollowing and substantial maxillary retraction. A colleague proposes treating the superficial cheek compartments alone. The more defensible position is:
Select an option to commit. The reasoning appears afterwards.
The 50s often require a structural approach: deep periosteal restoration addressing the skeletal support deficit before any superficial compartment treatment. Maxillary retraction and orbital expansion are skeletal changes, and no amount of superficial volume compensates for a foundation that has moved.
Patients treated superficially only often show poor longevity and risk tissue displacement. The sequence is what makes the result durable — and it is decided at assessment, by asking what structural support is missing rather than where the hollows are.
A patient in her early 70s with severe skin laxity and marked lower face redundancy requests cheek and jawline restoration. Her volume loss is genuine and profound. The primary reason for caution is:
Select an option to commit. The reasoning appears afterwards.
By the 70s, skin can no longer accommodate volume restoration without displacement. Redundancy exceeds the capacity of the tissue to redrape, which means restored volume is carried outward and downward rather than being lifted into position.
That does not close the conversation. Selective conservative restoration can complement surgical outcomes or address specific isolated concerns in appropriate candidates, and surgical consultation is often the primary recommendation rather than the last resort. Unit 5 takes that threshold judgement in full.
Unit 3 summary
Clinical takeaways
- The decade framework is an assessment scaffold, not a protocol. Transition points are not sharply age-bounded. Orbital expansion begins in the late 30s and maxillary retraction in the 40s, so two patients of the same age can sit either side of a change.
- The 50s are a step change, not a continuation. Around 30% of dermal collagen is lost in the first five years post-menopause, with substantial deep fat atrophy and maxillary retraction alongside it. Structural restoration precedes superficial work.
- Apparent fullness can be a comparison rather than a measurement. Buccal fat in the 50s appears to increase only relative to the compartments atrophying around it, and by the 60s its descent contributes to lower face heaviness.
- The practitioner’s question changes across the decades. Where are the lines, then what structural support is missing, then whether the skin can redrape at all. Applying an earlier question to a later presentation produces a heavier face, not a younger one.