HA vs. PMMA vs. Ellansé: A Clinical Comparison for Girth Enhancement
A clinical comparison of the three main filler classes used for penile girth enhancement — how they work, how long they last, and how to choose.
Penile Girth Enhancement: HA, PMMA, or Ellansé — A Clinical Comparison
Dr. Luis Casavantes | Dr. Palmira Morales
Avanti Derma, Tijuana, Mexico
Choosing a filler for penile girth enhancement is a clinical decision, not a preference. Three product classes dominate the field — hyaluronic acid (HA), polymethylmethacrylate (PMMA), and polycaprolactone (Ellansé) — and each behaves differently in tissue. Understanding those differences is what allows a physician and a patient to arrive at the right choice for a given anatomy, timeline, and risk tolerance.
How Each Material Works
Hyaluronic acid (HA). HA is a cross-linked hydrophilic gel that adds volume by attracting and binding water in the interstitial space. It integrates with tissue for approximately 9–14 months in the penile shaft, after which enzymatic breakdown returns the tissue to baseline. It is fully reversible with hyaluronidase. HA is the underlying material in most protocols marketed under names like Urofill — see our comparison of Urofill and PMMA for the practical implications.
Ellansé (polycaprolactone, PCL). Ellansé is a biostimulatory filler. Its 40-μm PCL microspheres provide initial volume in a carboxymethylcellulose carrier, then slowly stimulate the patient's own collagen as the microspheres degrade over 12–36 months depending on the variant (M, S, L, E). The result outlasts the microspheres themselves because it becomes the patient's own tissue.
PMMA (polymethylmethacrylate). PMMA microspheres (30–50 μm) do not degrade. They form a permanent scaffold that the body encapsulates in collagen. The result is designed to be lifelong. This permanence is both its greatest strength and the reason it demands the most stringent patient selection.
Duration and Reversibility
Property | HA | Ellansé | PMMA |
|---|---|---|---|
Duration in penile tissue | ~9–14 months | 12–36 months | Lifelong |
Reversible | Yes (hyaluronidase) | No, but resorbs | No |
Volume mechanism | Hydration | Volume + biostimulation | Scaffold + collagen |
Best candidate | First-timers | Committed patients wanting long-term without permanence | Experienced patients decided on permanence |
Clinical Trade-Offs
HA is the safest first step. A patient who has never had a filler in this anatomy can experience the result, live with it for a year, and decide whether to progress to a longer-lasting option. That reversibility is a clinical feature, not a limitation.
Ellansé sits in the middle. It offers meaningful longevity without committing the patient to a lifelong implant, and its biostimulatory effect can produce a more natural feel than pure volumizers. It is not reversible in the enzymatic sense, but it resorbs.
PMMA is the option for patients who have already gone through the process — often with HA — and are certain about the outcome they want to preserve. Its permanence rewards precision: a well-placed PMMA result is stable for decades. A poorly placed one is stable for decades too. That is why patient selection, injection technique, and provider experience matter more here than anywhere else — see our guide to choosing a phalloplasty doctor.
Anatomy Matters More Than the Material
The literature on penile augmentation is consistent on one point: complications cluster around patient selection and technique, not around a specific material. A skilled injector working with HA in the wrong patient can produce a worse result than an experienced injector using PMMA in the right one. Material choice follows anatomy, goals, and risk tolerance — never the other way around.
At Avanti Derma we offer all three because there is no single correct answer. A twenty-eight-year-old who wants to see what enhancement feels like before committing is a different clinical case than a forty-five-year-old who has lived with an HA result for two years and knows he wants it permanent.
Clinical Takeaways
HA is reversible and best suited to first-time patients.
Ellansé offers long-term results through biostimulation, without the permanence of PMMA.
PMMA is lifelong; patient selection and injector experience are non-negotiable.
Material selection is a clinical decision downstream of anatomy, goals, and risk tolerance — not a marketing preference.
A consultation that offers only one option, regardless of the patient in front of it, is not a consultation.
Bibliography
Casavantes, L., Lemperle, G., Morales, P. "Penile Girth Enhancement with PMMA-Based Soft Tissue Fillers." J Sex Med 13, no. 9 (2016): 1414–1422.
Nicolau, P.J., Marijnissen-Hofsté, J. "Neocollagenesis After Injection of a Polycaprolactone-Based Dermal Filler." J Cosmet Laser Ther 15 (2013): 19–26.
Manfredi, C., et al. "Penile Enhancement: A Comprehensive and Current Perspective." Current Urology (2024). PMC12076428.