Radiesse is one of the most established calcium hydroxylapatite (CaHA) injectables in aesthetic medicine. Unlike hyaluronic acid fillers, it works in two ways at once: it provides immediate volume through its CaHA microsphere gel, then drives progressive collagen production as the carrier gel is absorbed. This guide covers everything practitioners need to know about Radiesse, from its formulation and mechanism of action to hyperdilute technique, injection depth, indications, dosing, side effects, expected results and how it compares to other volumising and biostimulatory products.

What Is Radiesse?

Radiesse is an injectable implant made of calcium hydroxylapatite microspheres suspended in an aqueous carboxymethylcellulose gel carrier. It is manufactured by Merz Aesthetics. The CaHA microspheres are biocompatible and identical in composition to the mineral component of bone and teeth, and they are gradually metabolised over time, leaving no permanent material behind.

Key product specifications:

  • CaHA microsphere concentration: approximately 30% by volume, suspended in a 70% aqueous gel carrier
  • Microsphere size: 25 to 45 microns
  • Formats: 1.5 ml and 0.8 ml syringes; a lidocaine-containing version (Radiesse+) is also available
  • Typical longevity: 12 to 18 months, with collagen-related benefit often persisting longer
  • Regulatory status: FDA-approved for several facial and hand indications; CE-marked in Europe

Licensed practitioners can order Radiesse through the Radiesse brand page at Bioresus, including the standard Radiesse 1.5ml and the lidocaine formulation.

How Does Radiesse Work?

Radiesse delivers a dual mechanism of action that separates it from conventional HA fillers:

Immediate Volumisation

On injection, the gel carrier provides instant lift and volume. The high viscosity and elasticity (high G-prime) of Radiesse make it well suited to deep placement where structural support and projection are needed, such as the cheeks, jawline and chin.

Progressive Collagen Stimulation

As the carrier gel is absorbed over the first few weeks, the CaHA microspheres act as a scaffold that stimulates fibroblasts to produce new type I collagen (neocollagenesis). This is why the aesthetic benefit of Radiesse can outlast the physical presence of the gel, and why it is often described as a biostimulatory filler rather than a simple volumiser.

FDA-Approved Indications

In the United States, Radiesse is approved for:

  • Correction of moderate to severe facial wrinkles and folds, such as nasolabial folds
  • Correction of volume loss in the dorsum of the hands
  • Improvement of jawline contour and definition (Radiesse+ with the appropriate indication)

Beyond these approved uses, practitioners commonly use Radiesse off-label for a range of contouring and skin-quality applications, discussed below.

Common Treatment Areas

Mid-Face and Cheeks

Radiesse is frequently used for cheek and mid-face volumisation, where its high G-prime provides reliable projection and lift. It is placed in the deep subcutaneous or supraperiosteal plane.

Jawline and Chin

The structural properties of Radiesse make it a strong choice for jawline definition and chin projection, restoring a defined lower-face contour in patients with age-related bone and soft-tissue loss.

Nasolabial Folds and Marionette Lines

Radiesse corrects moderate to severe nasolabial folds and marionette lines through deep dermal or subdermal placement. Because it is a firmer product, superficial placement should be avoided to prevent visible nodules or a whitish appearance.

Hands

Hand rejuvenation is a well-established Radiesse indication. Diluted product is placed subdermally on the dorsum of the hand to restore volume and camouflage prominent tendons and veins.

Skin Tightening with Hyperdilute Radiesse (Off-Label)

Hyperdilute and diluted Radiesse has become a popular biostimulatory technique for improving skin quality and mild laxity across the neck, decolletage, upper arms, abdomen and buttocks. Here the goal is not volume but a diffuse collagen-stimulating effect.

Dilution and Reconstitution

Dilution ratio is one of the most important technique variables with Radiesse, because it changes the product from a structural volumiser into a biostimulatory skin-quality treatment:

  • Undiluted or lightly diluted (1:0.5 to 1:1 with lidocaine or saline): structural volumisation of cheeks, jawline and chin
  • Moderate dilution (1:1 to 1:2): softer contouring and nasolabial correction
  • Hyperdilution (1:2 up to 1:6 or more): diffuse collagen stimulation and skin tightening over larger body areas

Dilution is typically performed with bacteriostatic saline, lidocaine, or a combination, using a female-to-female luer lock connector to mix thoroughly between two syringes until a homogeneous consistency is achieved.

Injection Technique

Pre-Treatment Assessment

A thorough consultation should include full medical history (particularly anticoagulants and prior filler treatments), assessment of facial anatomy and bony support, standardised photography, documentation of patient goals, and informed consent covering risks, benefits and alternatives.

Placement and Depth

  • Cheeks and mid-face: deep subcutaneous or supraperiosteal, using a needle or cannula
  • Jawline and chin: supraperiosteal boluses and subdermal threading
  • Nasolabial folds and marionette lines: deep dermis to subdermal; never superficial
  • Hands and hyperdilute body treatments: subdermal, using a cannula for even distribution

Needle vs Cannula and Safety

A 25G to 27G cannula is widely preferred for Radiesse to reduce bruising and lower vascular risk in higher-danger zones. Intravascular injection is a rare but serious complication of all fillers. Practitioners must know the facial vascular danger zones, recognise the signs of vascular occlusion and have an emergency protocol in place. Note that, unlike HA fillers, Radiesse cannot be dissolved with hyaluronidase, so meticulous technique and a conservative approach are essential.

Post-Treatment Care

  • Mild swelling, redness and bruising are common and usually resolve within 3 to 7 days
  • Advise gentle massage only where instructed, particularly after hand and hyperdilute treatments, to ensure even distribution
  • Avoid extreme heat, saunas and vigorous exercise for 24 to 48 hours
  • Schedule a review at 2 to 4 weeks to assess results and plan any top-up

Expected Results and Longevity

Volumising results are visible immediately, with the collagen-stimulating benefit building over the following weeks. Longevity is typically 12 to 18 months for structural facial correction, with the neocollagenesis effect often extending perceived results beyond the life of the gel. Hyperdilute skin-quality treatments usually require a short course of sessions for optimal effect. Patients should understand that results are not permanent and that maintenance treatment will be required.

Contraindications

  • Known hypersensitivity to any component of the product
  • Active infection or inflammation in the treatment area
  • Pregnancy and breastfeeding
  • Bleeding disorders or anticoagulant therapy (relative contraindication; assess risk and benefit)
  • A tendency to hypertrophic scarring or active autoimmune skin disease
  • Radiesse is not recommended for lip augmentation due to a higher risk of nodule formation in that area

Radiesse vs Other Volumising and Biostimulatory Products

Radiesse vs HA fillers: Hyaluronic acid fillers such as Juvederm Volbella and the wider Juvederm range provide immediately reversible volume that can be dissolved with hyaluronidase, while Radiesse offers firmer structural support and collagen stimulation but is not reversible, so it suits patients wanting durable contouring rather than an easily adjustable result. Our Juvederm Volbella practitioner guide covers HA lip and perioral technique in detail.

Radiesse vs Sculptra: Both are collagen biostimulators, but they behave differently. Radiesse gives immediate volume plus gradual collagen stimulation, while Sculptra (poly-L-lactic acid) provides little immediate volume and works purely through progressive collagen build over a course of sessions.

Radiesse vs skin-remodelling treatments: For patients whose primary concern is skin quality and laxity rather than volume, treatments such as Profhilo address the dermis directly and pair well with Radiesse; see our Profhilo practitioner guide for the full protocol.

Patient Selection

Ideal Radiesse candidates are patients with moderate volume loss and good skin quality who want structural facial contouring or hand rejuvenation, and those seeking a biostimulatory skin-tightening option through hyperdilution. Radiesse is less suitable for patients wanting a fully reversible result, those requiring lip augmentation, or those with unrealistic expectations of a permanent outcome.

Ordering Radiesse Wholesale

Bioresus is a trusted wholesale supplier of Merz Aesthetics products to licensed practitioners across the UK and internationally. Browse the full Radiesse range on the Radiesse brand page, or explore the wider dermal filler brand collection to build out your injectable portfolio. To open a wholesale account or enquire about volume pricing, contact the Bioresus team directly.

Conclusion

Radiesse remains a versatile and reliable tool in the modern injectable practice. Its dual action of immediate volumisation and progressive collagen stimulation, combined with the flexibility of dilution from structural filler to hyperdilute skin booster, gives practitioners a single product that can address contouring, hand rejuvenation and skin quality. As with any non-reversible filler, sound technique, correct depth and careful patient selection are the keys to consistent, natural-looking results.