The Evolution of Dermal Fillers — From Collagen to Hyaluronic Acid

Last updated: 5 March 2026

The history of dermal fillers is a fascinating journey through innovation, setbacks, and scientific advancement. Understanding this evolution helps patients appreciate the safety and sophistication of modern filler products — and understand why the treatments available today at clinics like Axiom Aesthetics are remarkably different from their predecessors.

The Early Days: Paraffin and Silicone (1900s-1960s)

Paraffin Wax Injections

The earliest attempts at injectable facial augmentation date back to the early 1900s, when physicians experimented with injecting liquid paraffin (mineral oil) to fill facial defects and wrinkles. The results were initially promising but proved catastrophic over time. Paraffin migrated through tissues, triggered severe foreign body reactions (paraffinomas), and caused disfiguring complications. By the 1920s, paraffin injections had been largely abandoned by legitimate medical practitioners.

Liquid Silicone

In the 1950s and 1960s, liquid injectable silicone gained popularity, particularly in Japan and the United States. While medical-grade silicone was an improvement over paraffin, it still carried significant risks: granuloma formation, migration, chronic inflammation, and distortion. The FDA eventually restricted its use, though unlicensed practitioners continued to inject industrial-grade silicone — often with devastating consequences — well into the 2000s.

The legacy of these early materials underscores a critical lesson: permanent fillers that cannot be removed or reversed carry inherently higher long-term risks.

The Bovine Collagen Era (1981-2000s)

Zyderm and Zyplast

A major breakthrough came in 1981 with the FDA approval of Zyderm — the first commercially available injectable collagen filler. Derived from purified bovine (cow) collagen, Zyderm and its cross-linked successor Zyplast revolutionised aesthetic medicine by providing a regulated, standardised product with predictable results.

Advantages

• First FDA-approved filler with controlled manufacturing standards
• Relatively natural appearance and feel
• Established the concept of injectable facial rejuvenation as a legitimate medical procedure

Limitations

• Allergic reactions in 3-5% of patients (requiring a skin test 4 weeks before treatment)
• Short duration: results lasted only 2-4 months
• Animal-derived protein raised both safety and ethical concerns
• Limited volumising capacity

Despite their limitations, bovine collagen fillers dominated the market for nearly two decades and trained an entire generation of practitioners in injection techniques.

Human-Derived Collagen

In the late 1990s, human-derived collagen products (CosmoDerm, CosmoPlast) were introduced to address the allergy concerns associated with bovine collagen. Derived from human fibroblast cell cultures, these products eliminated the need for skin testing but still suffered from short duration and limited volumising capacity.

The Hyaluronic Acid Revolution (2003-Present)

A Game-Changing Molecule

The approval of Restylane (non-animal stabilised hyaluronic acid, NASHA) in the United States in 2003 marked the beginning of a new era in aesthetic medicine. Hyaluronic acid fillers rapidly displaced collagen as the product of choice and now account for the vast majority of dermal filler procedures worldwide.

Why HA Fillers Transformed Aesthetics

• Biocompatible: HA is a naturally occurring substance in human tissue, virtually eliminating allergic reactions and making skin testing unnecessary
• Hydrophilic: HA attracts water, providing both volumisation and hydration
• Versatile: By varying the cross-linking technology, concentration, and particle size, manufacturers can create fillers with vastly different properties — from thin, spreadable products for fine lines to firm, lifting products for deep structural support
• Reversible: The enzyme hyaluronidase can dissolve HA filler in hours, providing a safety net unmatched by any previous filler material
• Predictable: Modern HA fillers provide consistent, reproducible results
• Variable duration: Different products last from 6 to 18+ months depending on formulation

The HA Product Landscape

The modern HA filler market offers a remarkable range of products, each engineered for specific indications:

Juvederm Range (Allergan/Abbvie)

The Vycross cross-linking technology produces smooth, cohesive gels:

• Juvederm Voluma: High viscosity for deep volumisation (cheeks, chin, jawline)
• Juvederm Volift: Medium viscosity for moderate lines and folds
• Juvederm Volbella: Low viscosity for fine lines and subtle lip enhancement
• Juvederm Volite: Ultra-thin for skin quality improvement and hydration

Restylane Range (Galderma)

NASHA and OBT (Optimal Balance Technology) platforms:

• Restylane Lyft: Larger particle size for volume restoration
• Restylane Defyne: Flexible cross-linking for natural movement in dynamic areas
• Restylane Refyne: Ultra-flexible for subtle corrections in mobile areas
• Restylane Kysse: Specifically designed for lip augmentation with XpresHAn technology

Teoxane Range

RHA (Resilient Hyaluronic Acid) technology that mimics the natural movement of HA in the skin:

• RHA 2, 3, 4: Progressive firmness for different depths and indications
• Teosyal Redensity: Ultra-pure formulation for delicate areas (tear trough, periorbital)

Parallel Developments: Biostimulatory Fillers

Sculptra (PLLA) — Approved 2004

Sculptra introduced the concept of biostimulation to the filler category. Rather than simply filling, it stimulates the body to produce its own collagen. While technically a filler (it is injected), it functions as a biostimulator and represents a fundamentally different approach to facial rejuvenation.

Radiesse (CaHA) — Approved 2006

Radiesse bridged the gap between fillers and biostimulators, providing immediate volumisation through its CaHA microsphere suspension while stimulating long-term collagen production. Its versatility (standard and hyperdilute applications) has made it a valuable tool in the practitioner’s arsenal.

Current Trends and Innovations

Personalised Filler Selection

Modern practice increasingly recognises that different facial areas require different filler properties. The concept of “one product fits all” has been replaced by multi-product, multi-layer treatment plans where practitioners select specific fillers for each anatomical layer and treatment area.

Less Is More Philosophy

The aesthetic industry has shifted away from the over-filled “pillow face” look towards natural, refreshed results. This “less is more” philosophy emphasises structural support, skin quality, and facial harmony rather than maximal volumisation. At Axiom Aesthetics, we champion this approach.

Combination Approaches

Contemporary practice combines HA fillers with biostimulators, skin boosters, and energy-based devices for comprehensive facial rejuvenation. This multi-modal approach produces more natural-looking results than relying on filler alone.

Emerging Technologies

The future of dermal fillers includes several exciting developments:

• HA-biostimulator hybrids: Products that combine immediate HA volumisation with biostimulatory components for long-term collagen production
• Longer-lasting HA formulations: Advanced cross-linking technologies that extend duration without increasing complication risk
• Customisable fillers: Products that can be modified at the point of use to create specific rheological properties
• Bioengineered collagen: Lab-grown human collagen that eliminates both the allergy risk of bovine collagen and the ethical concerns of animal-derived products

What This Means for Patients Today

Modern dermal filler patients benefit from decades of scientific development:

• Excellent safety profile: HA fillers have millions of treatments’ worth of safety data
• Reversibility: The ability to dissolve filler with hyaluronidase provides an unprecedented safety net
• Natural results: Advanced product formulations and injection techniques produce remarkably natural-looking outcomes
• Longevity: Modern fillers last 6-18+ months, compared to 2-4 months for early collagen products
• Minimal allergic risk: Skin testing is no longer required for HA fillers
• Wide indication range: From fine lip lines to deep cheek volumisation, there is a specific product designed for every concern

Frequently Asked Questions

Are permanent fillers still available?

Some permanent or semi-permanent fillers (containing PMMA, polyalkylimide, or silicone) are still available in certain countries, but their use has declined dramatically due to the risk of long-term complications. In the UK, reputable practitioners overwhelmingly favour hyaluronic acid fillers due to their reversibility and excellent safety profile. We do not use permanent fillers at Axiom Aesthetics and strongly advise against them for aesthetic purposes.

How do I know which filler is right for me?

Filler selection should be based on the treatment area, the depth of the concern, the desired effect (volume, definition, or skin quality), and your individual tissue characteristics. This is a clinical decision that should be made by your practitioner based on their training and experience. During your consultation, we will explain which products we recommend and why, ensuring you understand the rationale behind your treatment plan.

Can old filler from years ago still be in my face?

HA fillers are gradually metabolised by the body and should be fully absorbed over time. However, studies using MRI imaging have shown that small amounts of HA filler can persist longer than previously thought — sometimes for several years, particularly in areas with lower metabolic activity. This is generally not problematic but is relevant when planning new treatments. Permanent fillers, if previously injected, remain indefinitely and can cause late-onset complications even years or decades after injection.

Why are some fillers more expensive than others?

Filler pricing reflects several factors: the manufacturer’s research and development investment, the sophistication of the cross-linking technology, the clinical evidence supporting the product, and the manufacturing quality controls. Premium products from established manufacturers with extensive clinical trial data tend to cost more but offer greater consistency, safety data, and predictability. At Axiom Aesthetics, we use only clinically proven products from reputable manufacturers.

Is it safe to switch between different filler brands?

Yes, it is generally safe to use different HA filler brands in the same face, either at the same time (in different areas) or sequentially (using a different brand at a subsequent appointment). All HA fillers are fundamentally composed of the same molecule (hyaluronic acid) and are biocompatible with each other. The choice of product should be based on which best suits the specific treatment area and indication, regardless of what was previously used. Your practitioner at Axiom Aesthetics will select the optimal product for each area based on clinical assessment.