Filler for marionette lines is injected along and slightly medial to the fold itself, into the fat layer just above the muscle, typically at a depth of a few millimeters beneath the skin. Most treatments also address the surrounding areas, including the jawline and pre-jowl sulcus, because marionette lines rarely improve fully when treated in isolation. The total volume usually ranges from 2 to 3 ml spread across both sides of the face.
Why Marionette Lines Form
Marionette lines run from the corners of the mouth down toward the chin, creating a bracket shape that can make the face look sad or heavy at rest. The main driver is a muscle called the depressor anguli oris, which pulls the mouth corners downward. The most inner edge of this muscle has attachments to the skin that form a fibrous band, sometimes called the labiomandibular ligament. This band acts like a tether, creating a visible crease as the fat pads on either side of it thin out and descend with age.
Volume loss in the lower cheek and chin compounds the problem. As fat shrinks and bone resorbs over the years, the skin has less support and the fold deepens. That’s why effective treatment often goes beyond the line itself.
Primary Injection Sites
The main target is the fold itself. Filler is placed slightly medial to (just inside of) the visible crease, running from the mouth corner down toward the chin. This directly fills the depression and softens the shadow that makes the line so noticeable. For mild to moderate lines, injections go into the subcutaneous fat layer sitting on top of the muscle, using a needle for precision.
For deeper folds, practitioners often take a multi-layer approach. Deeper deposits are placed close to the bone to provide structural lift, while a second pass addresses the more superficial fat layer to smooth the surface. The deeper layer benefits from a firmer filler that resists the compression of overlying tissue, while the superficial layer uses a softer product that moves naturally with facial expressions.
The depressed area just in front of the crease also gets attention. This region often shows visible hollowing, and filling it creates a more even transition rather than just erasing a single line.
Supporting Areas That Improve Results
Treating the marionette fold alone sometimes produces a flat or unnatural result because the surrounding structures are still deflated. Two neighboring zones frequently need filler as well.
The pre-jowl sulcus is the dip along the jawline just in front of the jowl. Filling this depression restores a smoother jawline contour and reduces the downward pull that deepens marionette lines. Filler here is typically placed right along the bone of the lower jaw.
The posterior jawline, from behind the jowl back toward the angle of the jaw, can also be treated. Two parallel lines are marked: one along the lower border of the jaw and another about 1.5 to 2 cm above it. Filler placed in this corridor corrects the depression caused by a ligament and the bulk of the chewing muscle, helping redefine the jaw’s contour. A sharper jawline visually lifts the lower face and reduces how prominent the marionette folds appear.
Techniques Used During Injection
Three main techniques are used in the marionette region, often in combination during a single session.
- Linear threading: The needle or cannula is inserted and filler is deposited in a straight line as the needle withdraws. This is precise and works well for the crease itself, laying down a smooth column of product directly beneath the fold.
- Fanning: From a single entry point, the needle is partially withdrawn and redirected multiple times, creating a fan-shaped spread of filler. This covers a wider area and is commonly used to restore volume in the broader zone around the fold.
- Cross-hatching: Filler is laid down in a criss-cross grid pattern, creating an even lattice of support beneath the skin. This technique distributes product uniformly and is specifically suited to the marionette region and the mouth corners.
Some practitioners use a cannula (a blunt-tipped, flexible tube) instead of a sharp needle, entering through a single puncture point near the mouth corner and threading the filler into position. Cannulas reduce the number of skin punctures and may lower the risk of hitting a blood vessel.
Vascular Risks Near the Mouth
The area around the mouth corners has significant blood supply, which is the main safety concern with marionette line injections. The facial artery sends branches to both the upper and lower lips, and these branches originate close to the corner of the mouth. In most people, the upper lip artery starts about 8 to 9 mm above the mouth corner, and the lower lip artery branches off below it. Small perforating vessels from the facial artery are most concentrated 1 to 2 cm to the side of the mouth corner.
These arteries run deep to the muscle in most cases, sitting between the muscle and the inner lining of the mouth in roughly 80% of people. But in about 3% of cases, arteries can travel just beneath the skin, making very superficial injection risky. This is one reason practitioners aspirate before injecting, work slowly, and watch for signs of compromised blood flow like blanching or unusual pain. If blood supply is accidentally blocked, rapid treatment with an enzyme that dissolves hyaluronic acid filler can restore circulation.
Filler Types for This Area
Two main categories of filler are used for marionette lines, and each works differently.
Hyaluronic acid fillers provide immediate volume by physically filling the space beneath the fold. They come in varying firmnesses, from soft gels for fine lines to thicker formulations for deep structural support. Results last between 4 and 24 months depending on the specific product, how much is injected, and how active the area is. Around the mouth, where muscles are constantly moving, fillers tend to break down faster, so most people see results lasting 9 to 18 months. A key advantage is reversibility: an enzyme can dissolve the filler if something goes wrong or the result isn’t right.
Calcium hydroxylapatite filler works in two phases. The gel carrier provides instant volume but dissolves within the first three months. Meanwhile, the tiny microspheres in the gel trigger the body to produce new collagen, which gradually replaces the carrier volume. This collagen-stimulating effect means results typically last 10 to 14 months. The filler is firmer, giving it strong lifting power for deep folds, but it’s not reversible with an enzyme. Some practitioners combine both types, mixing them to get the lift of calcium hydroxylapatite with the smooth texture and partial reversibility of hyaluronic acid.
What to Expect During and After Treatment
The treatment area is typically numbed with a topical anesthetic cream applied 15 to 30 minutes beforehand. Many fillers also contain a local anesthetic mixed into the product itself, which numbs as it’s injected. The actual injection process for both sides usually takes 15 to 30 minutes.
Mild swelling and bruising around the mouth are common for the first few days. The lower face tends to swell more noticeably than other areas because the tissue is looser. Final results become visible once swelling resolves, usually within one to two weeks. Some practitioners gently massage the area immediately after injection to smooth the product and prevent lumps.
Most people need 2 to 3 ml total for both sides. Women with moderate folds may need up to 4 ml if nasolabial folds are being treated at the same session. Touch-up appointments two to four weeks later allow the practitioner to assess results and add small amounts if needed, which tends to produce a more natural outcome than trying to achieve full correction in one visit.