Myomodulation: Can Filler Change How Muscles Move?

Myomodulation is the idea that carefully placed filler can change how facial muscles behave, either supporting a muscle that has lost its foundation or gently restraining one that pulls too strongly. A 2023 paper from Brazil described the concept and a structured technique, alongside records from more than 1,300 patients treated at one clinic. It is an interesting theory, but the authors themselves note the mechanism is unproven and the paper did not measure outcomes in a rigorous way.

Why this was studied

Facial ageing involves more than wrinkles. Bone gradually resorbs, fat pads shrink and shift, and muscles may start to act differently as the structures beneath them change. Some clinicians have noticed that restoring support in certain areas seems to change expression, for example making a smile look wider or reducing a downward pull at the mouth.

Myomodulation tries to explain those observations. The proposal is that filler can act like a fulcrum, a point of support that helps a muscle regain its natural curve and tone. Filler placed in or just over a muscle, or near where it attaches to the skin, might instead dampen its movement.

What the researchers did

Dr. Daniel Dal'Asta Coimbra and Dr. Betina Stefanello described their approach, which divides the face into eight major areas and treats them in a set order from the outer face toward the centre. They then reviewed records from their single cosmetic dermatology clinic between 2016 and 2021.

The series included 1,352 patients, about four in five of them women, with an average age of 51. Together they had almost 8,900 treatment sessions with hyaluronic acid filler, all performed by the lead author. Patients averaged six to seven sessions over the study period. Blunt cannulas were used for most treatments, and the outer cheek areas were the most frequently treated.

What they found

The paper mainly reports how often different areas were treated, which tools were used and how much product was typical, about a millilitre or a little more per side per session. The effects described, such as a lifting appearance, a broader smile and less "bunching" of muscle activity toward the centre of the face, are presented through photographs and case examples rather than measured with validated scales.

The authors also suggest the approach may help some people with muscle imbalance after facial paralysis. They did not report a complication rate, though they discuss known filler risks such as blood vessel blockage, nerve injury and overfilling.

How strong is this evidence?

This is a retrospective case series, rated by the journal at the lower end of the evidence scale. A case series describes what happened to a group of treated people. It cannot show that the treatment caused the changes, because there is no comparison group and no objective measurement.

Other important cautions:

• All treatments were done by one clinician at one clinic, so results may not transfer elsewhere.
• There was no standard follow-up schedule, and long-term durability is shown with a single case.
• No muscle activity was measured. The authors state the mechanism is not well understood and call for electrical muscle studies to test the theory.
• The study was sponsored by a filler manufacturer, and the lead author reported financial relationships with industry and related patents.

A large number of patients can make a series look persuasive, but size does not replace a controlled design.

What it means for you

The useful part of myomodulation for patients is the way of thinking it encourages. Your face is a moving structure, and changes in one area can affect expression elsewhere. A thoughtful plan considers how you look when talking and smiling, not just at rest, and often focuses on support before adding volume to lines.

What it does not do is promise that filler will retrain muscles. Results vary from person to person, filler is temporary and any change in expression depends on accurate placement. Our article on facial bone loss with ageing explains why support can matter, and filler versus neuromodulator outlines when muscle-relaxing injections are the more direct tool.

Filler is usually postponed during pregnancy or breastfeeding, with active skin infection or cold sores, or with some autoimmune conditions. Common effects include swelling and bruising. Rarer risks include lumps, infection and blood vessel blockage, which needs urgent treatment.

Why muscle and support are hard to separate

One challenge with testing myomodulation is that filler changes several things at once. It adds volume, shifts how light falls on the face and may alter how skin and fat drape, all of which can change how an expression looks without any real change in the muscle itself. Separating these effects would require measuring muscle activity before and after treatment, ideally with a comparison group treated differently. Until that kind of study is done, it is reasonable to describe any change in expression as a possible effect of better support, not proof that muscles have been retrained.

Questions to ask at your consultation

• Is my concern mainly about volume, muscle movement or skin quality?
• How does my face look in motion, and would treatment change my expressions?
• What does the evidence say about the technique you are proposing?
• Would a neuromodulator, a skin treatment or no treatment be a better fit?

Frequently asked questions

Is myomodulation a separate treatment?

No. It is a way of describing how filler placement might affect muscle behaviour. The treatment itself is hyaluronic acid filler, planned with movement in mind.

Can filler replace muscle-relaxing injections?

Not generally. The two work differently. Neuromodulators reduce muscle activity directly and predictably, while any muscle effect from filler is indirect and less well studied.

Is the theory likely to be proven?

It is possible, but it has not been tested with objective muscle measurements yet. Until better studies are done, it is best seen as a clinical hypothesis.

If you would like to understand how filler or other options might affect the way your face moves, HealthPark Medical Aesthetics in Sydney can discuss it at a consultation, along with the evidence and its limits.

Source

Coimbra DD, Stefanello B. Myomodulation with facial fillers: a comprehensive technical guide and retrospective case series. Aesthetic Plastic Surgery, 2023. Read the study