What is Radiesse and how does it work?
Radiesse consists of calcium hydroxylapatite microspheres suspended in a gel carrier. As the gel is absorbed, the microspheres act as a scaffold that may stimulate collagen production around them.
Calcium hydroxylapatite is a mineral compound also found in bone and teeth. In Radiesse it takes the form of tiny, smooth microspheres within a carboxymethylcellulose-based gel. Immediately after injection the gel provides volume and support. Over the following weeks the carrier is absorbed, while the microspheres encourage cells called fibroblasts to produce your own collagen in the treated area. The microspheres themselves are eventually broken down by the body.
Because of this dual action, Radiesse is described as both a filler and a biostimulator. A version containing lidocaine may be used to improve comfort during treatment. The forms available in Türkiye, their registration and traceability, and the authenticity of the product should be checked before treatment. Which form is used, at what dilution and in which area, or whether it is used at all, is decided by the physician at an in-person assessment.
What is the difference between diluted and undiluted Radiesse?
Undiluted, it is placed at specific points to provide support and contour. Diluted, it is spread thinly over a wider area to support skin quality rather than add volume.
Used undiluted, Radiesse may be placed deep, close to the bone, at support points such as the cheekbones, jawline or chin, to reinforce the underlying framework of the face. For diluted, sometimes called hyperdiluted, use, the product is mixed with saline and often lidocaine so that it becomes thinner, then placed more superficially and more widely under the skin. The aim here is gradual improvement in firmness and skin quality rather than volume.
The dilution ratio depends on the area, skin thickness and the goal. Beyond the face, diluted use may be discussed for the neck, décolletage or inner arms, though suitability is assessed separately for each area. Both approaches can be combined within the same plan. Because the diluted effect develops gradually, more than one session a few weeks apart is often planned, which is worth considering if you are travelling from abroad.
What can Radiesse address, and what can it not?
It may be planned for loss of support in the mid and lower face and for mild to moderate skin laxity. It is generally avoided in the lips and under the eyes and does not replace surgery for advanced sagging.
Radiesse may be considered for the cheeks, jawline, chin, temples and backs of the hands. In diluted form it may be used to support skin quality on the face, neck and some body areas. How much it achieves depends on your age, skin and individual collagen response. Expectations are therefore set by discussing what the product cannot do as clearly as what it can, and the plan is shaped around that.
Thin, mobile areas such as the lips and tear troughs are generally avoided because of the risk of nodules; other product classes may be discussed there instead. With marked excess skin and advanced sagging, the change achievable with injections is limited and is not equivalent to a surgical facelift. And because Radiesse cannot be dissolved with hyaluronidase, areas where reversibility matters are planned with that in mind.
Who may not be suitable for Radiesse?
It is not used during pregnancy or breastfeeding, with active infection in the area or with a known allergy to its components. Some medical conditions need individual assessment.
Treatment is not carried out, or is postponed, during pregnancy and breastfeeding, with active infection, cold sores or an acne flare in the area, or with a known allergy to any component or to lidocaine. A tendency to keloid or hypertrophic scarring, active autoimmune disease, bleeding disorders and blood-thinning medication are also discussed. This list is not exhaustive; your full medical history is always reviewed in detail at consultation.
Areas previously treated with fillers of unknown composition need particular care, as different materials in the same area can change the risk profile. Calcium hydroxylapatite can be visible on X-rays and some other imaging, so it is advisable to mention the treatment before future scans. Expecting a result equivalent to surgery is also considered a reason not to proceed, and alternatives are discussed openly in that case.
What happens during treatment, aftercare and what are the risks?
Treatment is usually brief and most people return to normal activities the same day. Swelling and bruising are common early on; nodules and, rarely, vascular occlusion are possible.
The skin is disinfected and the product is placed with a needle or cannula depending on the area. The lidocaine-containing form, or anaesthetic added during dilution, helps with comfort. Afterwards, it is usually advised to avoid strenuous exercise, saunas, alcohol and pressure on the area for 24 to 48 hours. After diluted treatment, brief massage may be recommended. A follow-up appointment allows the result, and any nodules, to be assessed.
Common effects are swelling, redness, tenderness and bruising, which usually settle within days. Nodules can occur, particularly in thin-skinned, mobile areas. Vascular occlusion is rare but serious; skin colour change, severe pain or visual disturbance require urgent attention. As Radiesse cannot be dissolved with an enzyme, safety relies on careful choice of area, depth and technique, and these risks are discussed face to face beforehand.
Frequently asked questions
How long does Radiesse last?
It varies with the area, the way it is used and your metabolism. Effects of around a year, and longer in some areas, are commonly reported, but this differs between individuals and your likely duration is discussed at consultation.
Is Radiesse a filler or a biostimulator?
It is described as both. Undiluted, the gel provides filler-like support; the microspheres’ potential to stimulate collagen is its biostimulatory effect. Dilution and technique determine which effect is emphasised.
Can Radiesse be dissolved?
Calcium hydroxylapatite is not dissolved by hyaluronidase, the enzyme used for HA fillers. Careful planning of area and technique is therefore especially important, and any complication is managed according to the situation by the physician.
Can Radiesse be used in the lips?
It is generally avoided in the lips because of the risk of nodules. Other product classes, such as HA fillers, may be discussed for the lips at an in-person assessment.
Can I have Radiesse during a short trip to Istanbul?
A single session may fit a short stay, but the plan depends on your assessment. Diluted treatment often involves more than one session, and allowing a few days for a follow-up check is advisable. Travel arrangements should be agreed with the physician first.
When will I see results from Radiesse?
The support from Radiesse is usually noticeable during treatment, while early swelling and any bruising settle within one to two weeks for most people. The change linked to the collagen response develops gradually over the following weeks and months. With diluted Radiesse, the change in skin quality is usually assessed a few months after the planned sessions are complete.
What is the difference between Radiesse and Sculptra?
Radiesse contains calcium hydroxylapatite (CaHA) in a gel carrier, whereas Sculptra contains poly-L-lactic acid (PLLA). The Radiesse gel gives support at the time of treatment, whereas Sculptra works gradually over weeks and months and usually needs several sessions. Neither is dissolved by hyaluronidase; there is no general ranking between them, and the choice depends on the area and the goal.
Can Radiesse be used on the backs of the hands?
Yes, Radiesse can be used on the backs of the hands to soften veins and tendons that show more as fat is lost with age. Swelling, bruising, tenderness and tightness when using the hands can occur early on and usually settle by themselves. The veins and tendons are assessed beforehand, and easing off strenuous hand use for a few days may be advised.
Is it normal to feel firmness or a lump after Radiesse?
Yes, mild firmness and a palpable fullness are common in the first days after Radiesse and usually soften within weeks. A lump that becomes visible, grows, turns red or has not settled after several weeks may be a nodule and should be assessed by the physician. As Radiesse is not dissolved by an enzyme, your physician decides whether massage, waiting or another approach is needed.
Sources (4)
- U.S. FDA: Premarket Approval (PMA) P050037: RADIESSE
- Aesthet Surg J (Aguilera et al.): The Role of Calcium Hydroxylapatite (Radiesse) as a Regenerative Aesthetic Treatment: A Narrative Review (2023)
- Dermatol Surg (Goldie et al.; international panel incl. European experts): Global Consensus Guidelines for the Injection of Diluted and Hyperdiluted Calcium Hydroxylapatite for Skin Tightening (2018)
- Aesthet Surg J Open Forum (Moradi et al.): Guidelines for Optimal Patient Outcomes Using Calcium Hydroxylapatite for Jawline Contour (2023)
This content is for general information and does not replace a personal medical assessment.