The Art of the Lips: A Master Class in Non-Surgical Augmentation
Imagine standing before your patient, not with a syringe of filler, but with a sculptor’s eye and a surgeon’s precision. The lips are not just tissue—they are architecture, blood supply, and poetry all at once. Tonight, I want to share with you a story about a technique that I developed over years of learning, failing, and refining. It’s called the Three-Point Liap Technique, known by some as the inverted Mercedes-Benz approach, and it uses the SoftFil cannula to achieve results that are both safe and beautiful.
Before we dive into the technique itself, we must first understand the landscape. What procedures can we offer to enhance the lips? We have surgical augmentation with silicone implants, neurotoxins at the vermilion border to relax the orbicularis oris muscle and create a lip flip, fillers for volume, smooth threads to sharpen a crisp border, PRP or skin boosters for rejuvenation in dehydrated or loose tissue, and even Nd:YAG lasers for lip depigmentation. But today, our focus is on non-surgical lip augmentation using fillers. This is where the story truly begins.
The Foundation: Anatomy and the Five Layers
We all know that the face is built in five layers: skin, superficial fat, muscle, deep fat with ligaments, and finally bone. The lips follow a similar but distinct structure. Here, we have five layers as well: the skin, the subcutaneous tissue, the muscle, the sub-mucosa, and the oral mucosa. The subcutaneous tissue—layer number two—is always your target for injection. But here’s a crucial insight that many overlook: the lips take their support from the teeth. Any malalignment in the dentoalveolar structure will affect the shape of the lips. So, a little knowledge about dental anatomy is not optional—it is essential.
The upper lip receives its blood supply from the superior labial artery, the subalar artery, and the septal artery. The lower lip is supplied by the inferior labial artery and the horizontal-vertical labiomental arteries. Let me draw this for you in your mind: if you grind your teeth, palpate the masseter muscle, and feel the antegonial notch, the facial artery runs a tortuous course from there. It gives off the inferior labial, then the superior labial, and finally becomes the angular artery. Knowing the depth and location of these arteries is not an academic exercise—it is the difference between a beautiful result and a serious complication.
Understanding the Arteries: Depth and Variation
In 90% of cases, the superior labial artery is bilateral. It usually emerges superior and lateral to the oral commissure. And most of the time, it runs deep. This means you should inject superficially. But remember—anatomy is not a textbook. There are always variations. That is why the use of ultrasound is such a powerful tool in our practice.
The inferior labial artery typically divides at the same level as the oral commissure, sometimes slightly inferior or superior. Again, it is usually deep, but anatomical variations exist. Look at this case: this is not a fibroma or a neoplastic lesion. This is an artery that should have been deep, but in this particular patient, it is superficial. If you have ultrasound, you can see it. If you don’t, use your hands. Palpate the lips. Examine them. If you see a nodule, observe it. If it is pulsating, that is a tortuous, persistent artery—an anatomical variation that demands your caution.
The facial artery, as I said, sits about 2 centimeters from the corner of the mouth. Do not press firmly—just a gentle palpation, and you can feel it pulsating. It divides into the inferior and superior labial arteries, and the distance from the oral commissure is approximately 13.6 millimeters—roughly 2 centimeters. This measurement will determine your point of entry when using the cannula.
Before the Needle: The Patient Journey
Now, let me take you into my clinic. The patient is seated before me. What do I do first? I discuss the treatment goal. Does she want better-looking lips? Does she want big lips? Does she pull out her phone and say, “I want lips like Angelina Jolie”? This conversation is crucial. You must align expectations with what is anatomically possible.
Next comes the assessment. I examine the lips carefully. Are they loose or firm? Look at this first picture—the lips are cracked, fissured, dehydrated. This is not a good candidate for filler today. I would put this patient on a protocol to restore hydration first. I would start with PRP or skin boosters. Once the lips are nourished, then—and only then—would I consider fillers.
I put a treatment plan in place. I use consent forms to avoid any ethical issues. Then, anesthesia. This is how I do it: I apply a numbing cream. Then I inject a plain lidocaine solution—no epinephrine—extraorally. I place it here, here, at the mentum, and one at the midline. I never give dental infiltration or intraoral injections. All my anesthesia is extraoral. Then, I begin.
There is a valuable research article by Jacob et al. that classified ten lip zones for injection. I have developed my own philosophy about which zones to avoid. Let me share my four “no zones” with you.
The Four No Zones: Where I Never Inject
1. The Philtrum Columns (Philtrum Bridges)
I am not fond of injecting the philtrum columns. These are the two vertical ridges running from the nose to the upper lip. I do not see beauty in creating two prominent rods here. Moreover, if a patient has a long philtrum length, and you make those columns more prominent with filler, you will only exaggerate the length. Patients with a long philtrum are not good candidates for this approach. Furthermore, the arteries in this area are multilayered—they can be deep or superficial. If you must inject here, do it intradermally. But I generally avoid it.
2. The Midline of the Upper Lip
I never, ever inject here. The only exception is if the upper anterior teeth are protruded or missing—for example, if the patient has an implant, a crown, or a veneer that does not provide adequate labial support. In that case, I might augment this area. Otherwise, I leave the midline of the upper lip untouched.
3. The Vermilion Zone
This is likely to be a controversial point. Many clinicians inject at the vermilion border. I do not. The vermilion zone is an empty zone. When we perform a C-section dissection, this area is completely empty. If you place filler in an empty zone, it will move. It will spread locally or migrate, and it will accumulate at the “argot area” (the skin side of the lip). You end up with a result that is not only unnatural but also counterproductive to your aesthetic goals.
4. The Wet-Dry Border
If you invert your lips, you see a line running inside—the wet-dry border. Do not approach this line. 80% of the vessels lie in this plane. Injecting here increases the risk of vascular occlusion. The only exception is in certain cases, such as creating an M-shaped lip, where I might approach it with extreme caution. I would do a lateral subcision and reverse threading, but this should only be attempted with great care.
These are my four no zones: the philtrum columns, the midline of the upper lip, the vermilion, and the wet-dry border—unless there is a valid exception.
When Things Go Wrong: Dissolving Old Filler
Let me show you a case where filler spread or migrated locally and accumulated on the skin side of the lip. This is common when the vermilion zone is incorrectly used. To correct this, I use hyaluronidase. I pick the skin with a pilot needle, then enter with a 27-gauge cannula. In Egypt, we have Hylaise available, but wherever you are, the principle is the same. I inject the hyaluronidase at the skin side and within the fat cell, working in different planes to dissolve the old filler. I dilute 1,500 units of hyaluronidase in 2 or 2.5 milliliters of saline. You may add lidocaine because it stings, but I prefer not to. My entry point is here, and I inject the hyaluronidase into the argot area.
This is not just a technique—it is a philosophy. The goal is not to create volume for volume’s sake. It is to create harmony, respect anatomy, and prioritize safety. The three-point approach with the SoftFil cannula was born from this philosophy. It limits the number of entry points, respects the vascular anatomy, and delivers a natural result.
So when you stand before your patient, remember this: the lips are a story waiting to be told. Your hands are the storyteller. And the anatomy is your guide.