About This Treatment

A New Standard of Care for Unwanted Dermal Fillers

Expert Credentials

Dr. Raffy Karamanoukian: Los Angeles Expert in Filler Complication Management

Dr. Raffy Karamanoukian, MD, FACS is a board-certified plastic and reconstructive surgeon and a Fellow of the American College of Surgeons. Having received his medical education at UCLA, he has dedicated a significant portion of his practice to the management of injectable filler complications — a specialty that requires not only an encyclopedic knowledge of facial anatomy but also a surgeon's discipline in managing risk, precision, and patient expectations.

Dr. Karamanoukian was among the early adopters of ultrasound-guided techniques in the Los Angeles plastic surgery community, recognizing that the complexity of filler-related complications demanded imaging technology historically reserved for diagnostic radiology. His combination of surgical training, deep anatomical expertise, and imaging-guided technique distinguishes the level of care offered at Kare Plastic Surgery from standard med spa or aesthetician-based dissolve treatments.

He has contributed expert commentary on platforms including RealSelf — where he holds the prestigious RealSelf 100 designation — on topics including Bellafill complications, granuloma formation, silicone biopolymer removal, and the ethics of permanent filler use. His philosophy is direct: permanent fillers carry risks that are often underestimated, and patients deserve access to board-certified surgical expertise when complications arise.

Dr. Karamanoukian's practice in Santa Monica and Beverly Hills treats patients who have experienced complications after visiting other providers, including cases of significant filler migration, chronic inflammatory granulomas, silicone biopolymer reactions, and post-filler vascular compromise. His surgical background allows him to offer both non-surgical enzymatic dissolution and operative removal when warranted — a dual-modality capability rarely found in a single Los Angeles practice.

The Technology

How Ultrasound-Guided Filler Dissolving Works

High-resolution diagnostic ultrasound operates by emitting high-frequency sound waves (typically 15–20 MHz for superficial soft tissue) that bounce off tissue interfaces and return as real-time images. In the context of filler dissolving, this technology provides a previously unavailable window into the three-dimensional architecture beneath the skin — revealing filler deposits, blood vessels, muscle layers, and anatomical landmarks with exceptional clarity.

Why Ultrasound Guidance Is Now the Standard of Care

Traditional filler dissolution relies on the practitioner's tactile sense and surface assessment to estimate filler location. While experienced practitioners can identify gross accumulations by palpation, this approach fails to reveal the true depth, volume, or vascular proximity of deposits — particularly in delicate areas such as the tear trough, perioral region, and nasolabial folds, where critical vessels run in close proximity to common filler planes.

Ultrasound guidance eliminates this uncertainty. By visualizing the filler pocket in real time, Dr. Karamanoukian can guide the needle precisely into the target, confirm placement before injecting hyaluronidase, and monitor dissolution as it occurs. This significantly reduces the total enzyme required, minimizes trauma to surrounding tissue, and dramatically improves safety in vascular-dense regions of the face.

Filler-Specific Treatment

Dissolving & Removing All Types of Dermal Fillers

Not all fillers respond the same way to dissolution. Dr. Karamanoukian tailors the treatment protocol to the specific product involved, its degree of cross-linking, and the duration of implantation.

The Dissolving Enzyme

Hyaluronidase: Vitrase & Hylenex for HA Filler Removal

Hyaluronidase is an endoglycosidase enzyme that cleaves the glycosidic bonds within hyaluronic acid molecules, breaking the polymer chains that give HA fillers their structural integrity. The enzyme has been used safely in medicine for over 70 years — originally as a spreading factor in ophthalmology and intravenous therapy — and is now applied off-label to dissolve hyaluronic acid-based dermal fillers.

At Kare Plastic Surgery, Dr. Karamanoukian uses two FDA-approved formulations: Vitrase (ovine hyaluronidase) and Hylenex (recombinant human hyaluronidase). Both work via the same enzymatic mechanism but differ in their source and molecular profile, and Dr. Karamanoukian selects the appropriate formulation based on allergy history and clinical indication.

How Much Hyaluronidase Is Needed?

A common misconception is that filler dissolution is a 1:1 equation — one vial of enzyme per syringe of filler. In reality, the relationship is far more complex. Clinical data and published research indicate that dissolving a single syringe of HA filler may require 5–6 vials of hyaluronidase, depending on the product's degree of cross-linking, the duration of implantation, and the depth of placement. Highly cross-linked fillers such as Juvederm Voluma are significantly more resistant than low-cross-link products. Filler that has been present for years develops additional fibrous encapsulation that further limits enzymatic access.

For this reason, Dr. Karamanoukian often recommends staged dissolution — particularly for patients with significant filler burden — allowing time between sessions for the body's macrophage activity to assist in clearing degraded HA fragments. Ultrasound at each follow-up session confirms the degree of residual product and guides subsequent treatment planning.

Allergy Testing Before Hyaluronidase

Although true hyaluronidase allergy is uncommon, a pre-treatment skin test is available for patients with a history of insect sting allergy or prior reactions to injectable products. Dr. Karamanoukian reviews each patient's allergy history at consultation and makes individualized recommendations regarding the need for skin testing before proceeding.

Calcium Hydroxylapatite Fillers

Radiesse Filler Removal & Correction

Radiesse is composed of calcium hydroxylapatite (CaHA) microspheres suspended in a carboxymethylcellulose gel. Unlike HA-based fillers, Radiesse cannot be dissolved with hyaluronidase. The gel carrier is gradually resorbed by the body, but the CaHA microspheres can persist for 12–18 months or longer, and nodule formation may require specific intervention.

For patients experiencing Radiesse nodules, migration, or undesirable volume, Dr. Karamanoukian employs several treatment strategies. Sodium thiosulfate has demonstrated off-label utility in dissolving CaHA deposits by chelating the calcium component, and is used at our practice in appropriately selected cases. Ultrasound guidance is essential for confirming nodule location before steroid injections or sodium thiosulfate are placed, preventing blind injection into vascular structures. For persistent or large Radiesse deposits, surgical excision under local anesthesia is the most definitive approach.

Permanent Filler Complications

Managing Permanent Fillers: Bellafill, Silicone, PMMA & Bio-Alcamid

Permanent fillers present the most complex management challenge in aesthetic medicine. Because these products cannot be enzymatically reversed, treatment requires a multi-modal surgical and medical approach — and the expertise of a board-certified plastic surgeon.

Bellafill & PMMA (Polymethylmethacrylate) Filler Complications

Bellafill — and its predecessors Artefill and Artecoll — consists of PMMA microspheres suspended in bovine collagen gel. The PMMA component is non-resorbable: once the collagen carrier is absorbed, the microspheres become encapsulated by fibrous tissue and remain permanently within the soft tissue. While PMMA fillers carry a lower reported granuloma incidence than older permanent fillers, late-onset foreign body reactions, nodularity, and chronic inflammation do occur — sometimes years or even decades after injection.

Dr. Karamanoukian has extensive experience managing PMMA-related complications and has been recognized as an expert in this area on platforms including RealSelf. His approach to Bellafill and PMMA complications is tailored to the location, severity, and chronicity of the reaction:

• Intralesional corticosteroid injection (Kenalog/triamcinolone): The first-line treatment for granuloma formation, administered under ultrasound guidance to target the nodular reaction directly while minimizing systemic steroid exposure and risk of atrophy to surrounding tissue.
• 5-Fluorouracil (5-FU) combination therapy: Low-dose intralesional 5-FU combined with triamcinolone is used for fibrotic nodules resistant to steroid monotherapy, leveraging the anti-fibrotic properties of 5-FU to soften the fibrous capsule surrounding PMMA deposits.
• HIDEF Fractional RF (Radiofrequency) treatment: High-definition fractional radiofrequency energy is applied to areas of PMMA nodularity to disrupt the collagen lattice encasing the microspheres, improving surface contour and reducing palpable firmness without systemic side effects.
• Surgical excision: For accessible PMMA deposits in the lips, lower face, and eyelids, surgical removal under local anesthesia offers definitive correction. Mid-face PMMA deposits are technically more challenging to remove surgically due to their proximity to critical vascular and nerve structures, and non-surgical approaches are typically preferred as the initial treatment strategy.

Liquid Silicone & Silicone Biopolymer Removal

Liquid injectable silicone represents one of the most problematic fillers from a complication management standpoint. Used extensively for lip and facial augmentation — particularly through non-medical channels — and for body contouring of the buttocks and other regions, liquid silicone provokes a foreign body reaction that includes chronic inflammation, migration, and disfiguring granuloma formation that can worsen progressively over time.

Dr. Karamanoukian is one of Los Angeles's leading specialists in silicone biopolymer removal and manages both facial and body silicone complications. His practice offers:

• Ultrasound-guided assessment: Ultrasound maps the extent of silicone deposits and associated fibrosis, establishing the surgical plan and identifying vascular structures at risk.
• Adjunctive hyaluronidase: While hyaluronidase cannot dissolve silicone, it can be used to soften the perilesional fibrosis surrounding silicone granulomas, improving the surgical access plane and reducing post-operative firmness.
• Surgical excision: Definitive management of facial silicone deposits requires careful surgical dissection to remove the silicone-laden tissue while preserving surrounding anatomical structures. Dr. Karamanoukian's surgical training allows him to operate safely in vascular-dense areas of the face where non-surgeon providers cannot.

Bio-Alcamid & Aquamid (Polyacrylamide Hydrogel) Treatment

Bio-Alcamid and Aquamid are permanent polyacrylamide hydrogel fillers used extensively outside the United States, particularly for HIV-associated facial lipoatrophy and cosmetic lip augmentation. These fillers form a water-filled prosthesis surrounded by a thin fibrous capsule. They are not enzymatically reversible and carry significant risks of late-onset infection — with biofilm-related infections reported years after injection — as well as capsular contracture and progressive deformity.

Treatment requires aspiration of the liquid core under image guidance, followed by surgical excision of the fibrous capsule in cases where the capsule has contracted or become infected. Dr. Karamanoukian manages these complex cases with a staged approach informed by ultrasound imaging to map the extent of hydrogel distribution and identify areas of capsular involvement.

Sculptra & Poly-L-Lactic Acid (PLLA) Nodule Treatment

Sculptra works by stimulating collagen production and is not a filler in the traditional sense — it does not provide immediate volume. However, improper dilution, injection technique, or placement can result in PLLA nodule formation. These nodules are not reversible with hyaluronidase. Dr. Karamanoukian manages Sculptra nodules with intralesional triamcinolone injections under ultrasound guidance, 5-FU combination therapy for fibrotic cases, and surgical excision for accessible, persistent nodules.

Recovery & Results

What to Expect After Ultrasound-Guided Filler Dissolving

Many patients notice a softening of excess volume within minutes of hyaluronidase injection, with continued improvement over the following 24–72 hours as the enzyme completes its action and post-procedural swelling resolves. Research confirms that the most significant volume reduction — approximately 64% — occurs within the first hour after hyaluronidase administration, with total reduction reaching approximately 82% at 24 hours for most HA-based products.

Minor swelling, bruising, and redness at injection sites are expected and typically resolve within a few days. Patients should avoid strenuous exercise, alcohol, extreme heat (saunas, hot tubs), and anti-inflammatory medications for 24 hours following treatment. Most patients can return to normal activities immediately after the appointment.

Because filler dissolution is a process — not a single event — follow-up ultrasound assessment at 2–4 weeks allows Dr. Karamanoukian to evaluate residual product and determine whether additional sessions are required. The number of sessions needed depends on the volume and type of filler present, the duration of implantation, and the patient's individual treatment goals.

Common Questions

Frequently Asked Questions