What happens to the jaw bone when we age?
- Facial Ageing Uncategorized
- April 18, 2023
As we age, it’s natural for bones to lose density and strength — a process called bone resorption. Bone resorption occurs when old bone is broken down by cells called osteoclasts, followed by the formation of new bone by osteoblasts. Over time, the balance shifts: bone resorption outpaces bone formation, leading to a gradual loss of bone mass and strength. The jaw bone (mandible) is not exempt from this process.
How Bone Changes Affect Facial Structure
Research comparing CT scans of young and aged skulls shows that as we age:
- The eye sockets widen and lengthen
- The nose, brow, and upper jaw decrease in angles
- The lower jaw shortens in both length and height
These changes mean the jaw gradually transforms from an “L” shape at the jaw angle into a more vertical, italic-like shape. This affects the overlying facial tissues — skin, muscles, and fat pads — causing hollowing and sagging over time.
Age and Gender Differences in Jaw Bone Changes
Studies analysing skulls from people aged 20–40, 31–64, and over 65 found:
- Bone changes occur in both men and women
- Women may experience noticeable jaw bone changes earlier, from young to middle age, while men tend to show similar changes later in life
Understanding these natural changes can help explain why facial volume loss, hollowing under the cheeks, and sagging around the jawline occur with age.
Why This Matters for Facial Aesthetic Treatments
Changes in the jaw bone affect the support for facial soft tissue. Recognising the underlying structural changes is critical when planning treatments such as:
Using an evidence-based, consultation-led approach ensures any treatments are personalised, focus on safety, and aligned with your facial anatomy.
Frequently Asked Questions
As we age, the jaw bone naturally loses density and height due to bone resorption. This affects the support for overlying facial tissues, leading to hollowing around the cheeks, jawline, and under the eyes.
Bone changes occur in both men and women, but women often experience noticeable changes earlier, from young to middle age. Men tend to show similar changes at a later stage.
Jaw bone changes reduce support for skin, muscle, and fat pads. This can result in visible hollowing, sagging, and changes in facial contours over time.
Bone loss itself cannot be reversed non-surgically. A consultation to discuss volume loss treatments ensures treatments are personalised.
Why is a consultation important before treatment?
Ultrasound can be used to visualise underlying structures such as fat pads and muscles, helping plan safe and effective treatment. This is particularly useful for patients concerned about volume loss or hollowing.