Dermal Fillers: Types, Uses, Benefits, and Side Effects

Aesthetic filler is a medical aesthetic procedure that aims to define facial contours, restore volume loss, and reduce wrinkles using biocompatible substances injected beneath the skin. It is widely applied in dermatology and aesthetic medicine to provide a younger, more balanced, and fuller appearance without requiring surgery.

Aesthetic filler applications are minimally invasive procedures that can be performed in different anatomical areas for facial rejuvenation and volume enhancement. They are used in areas such as the lips, cheekbones, nasolabial folds, jawline, and under-eye area, enabling aesthetic adjustments that balance facial proportions while preserving a natural appearance.

Hyaluronic acid fillers are the most widely used applications among aesthetic filler types. These substances, which have a high water-retention capacity, add volume to the skin, reduce wrinkles, and increase tissue hydration. Thanks to their biocompatible structure, they are gradually absorbed by the body and allow safe aesthetic adjustments.

Alternative filler types such as calcium hydroxyapatite, polylactic acid, and fat injection have been developed for different aesthetic needs. These filler types support subcutaneous tissue, stimulate collagen production, and contribute to a more defined and balanced facial contour by providing a long-lasting volumizing effect.

Procedure	Aesthetic filler is an injection-based aesthetic procedure performed to restore volume loss, define contours, and reduce fine lines and wrinkles in the face and sometimes in specific areas of the body.
Most Commonly Used Filler Substance	Hyaluronic acid-based fillers are the most commonly used filler substances. Different types of fillers such as calcium hydroxyapatite, poly-L-lactic acid, and polymethyl methacrylate (PMMA) may also be preferred in certain cases.
Application Areas	They can be applied to areas such as the lips, cheeks, cheekbones, jawline, chin tip, nasolabial lines, marionette lines, under-eye trough, nose contouring, and temples.
Who Is It Suitable For?	It may be considered for adults who experience facial volume loss, want to define their facial features, seek non-surgical aesthetic solutions, and are in suitable general health.
Who May Not Be Suitable?	The procedure requires physician evaluation in individuals with an active infection at the injection site, a known severe allergy to the filler substance, certain autoimmune diseases, or those who are pregnant or breastfeeding.
Preparation Before the Procedure	The medical history is evaluated. The physician should be informed if blood-thinning medications or supplements are being used. Avoiding alcohol consumption and certain products that may increase the risk of bleeding may be recommended before the procedure.
Application Duration	It generally takes 15–45 minutes, depending on the treatment area.
Anesthesia	Anesthetic cream is sufficient for most applications. Some filler products contain a local anesthetic substance. Local anesthesia may be applied when necessary.
How Is the Procedure Performed?	The filler substance is injected into the target area with the help of a fine needle or cannula. Light massage may be applied after the injection for shaping purposes.
Onset of Effect	Most of the results are visible immediately after the procedure. As any swelling subsides, the final appearance becomes clearer within a few days.
Duration of Results	Depending on the filler substance used, the treatment area, and the person’s metabolism, it may generally vary between 6 and 24 months.
Advantages	Its main advantages are that it does not require surgery, can be performed in a short time, has a short recovery period, and can provide a natural-looking increase in volume.
Possible Side Effects	Temporary redness, swelling, bruising, tenderness, and pain at the injection site may occur. These effects usually resolve within a few days.
Serious Risks	Serious complications such as vascular occlusion, tissue damage, infection, filler migration, nodule formation, and, very rarely, vision loss may develop. Therefore, it is important for the procedure to be performed by experienced healthcare professionals.
Post-Procedure Care	Avoiding strenuous exercise, excessively hot environments, and alcohol consumption during the first 24 hours may be recommended. Unnecessary pressure should not be applied to the area, and the physician’s recommendations should be followed.
Return to Daily Life	Most people can return to their normal daily activities on the same day. Mild swelling or bruising may last for a few days.
Maintaining the Results	Regular skin care, sun protection, and planned follow-up applications when necessary may contribute to maintaining the results.
Dissolving the Filler	Hyaluronic acid-based fillers can be dissolved using the hyaluronidase enzyme when necessary. This may not be possible with other filler types.
Follow-Up Examination	If deemed necessary, a follow-up evaluation may be performed 1–3 weeks after the procedure, and a touch-up application may be planned if needed.
Expected Result	The aim is to provide a natural-looking increase in volume and aesthetic balance that is compatible with the facial features. Results may vary according to the person’s anatomical structure and the filler substance used.

What Is Aesthetic Filler?

Aesthetic filler is essentially a treatment method applied by injecting biocompatible substances beneath the skin to soften facial lines, add volume, or define facial contours. These substances imitate or support the natural structure of the skin and fill the gaps created by the decline in collagen and elastin production over time. As a result, a smoother, fuller, and younger appearance is achieved.

These fillers are generally produced from substances naturally found in the body, such as hyaluronic acid. In this way, the risk of allergic reactions is minimized, and the substance is safely absorbed by the body over time after application. The application time is generally short, and the recovery process is also quite rapid.

• The Main Purpose of Aesthetic Filler

The primary aim of aesthetic filler is to reduce signs of facial aging in a natural and aesthetically pleasing manner. These signs include deepened nasolabial lines, which extend from the nose to the lips, marionette lines, which extend from the corners of the mouth to the chin, and lines on the forehead and between the eyebrows. In addition, aesthetic improvements such as restoring cheek and lip volume lost with age, defining the jawline, filling under-eye hollows, and making slight corrections to the shape of the nose are also possible with filler applications.

These applications not only provide an anti-aging solution but also help correct facial asymmetries and improve overall facial harmony. Fillers strategically applied to specific areas of the face can create a more balanced and attractive profile.

• Skin Structure and the Effects of Fillers

Our skin consists of the epidermis, which is the outermost layer, the dermis, which is the middle layer, and the hypodermis, which is the innermost layer. The dermis contains collagen and elastin fibers that provide elasticity and fullness to the skin, as well as a substance called hyaluronic acid. As age advances, the production of these structural components decreases and existing ones become damaged due to the harmful effects of the sun and environmental factors. This leads to sagging, wrinkles, and volume loss in the skin.

Aesthetic fillers come into play precisely at this point. The injected filler substances settle into the dermis layer, providing both structural support to the skin and increasing its moisture-retention capacity. Since hyaluronic acid-based fillers have the ability to retain up to one thousand times their own weight in water, they make the skin appear more hydrated, fuller, and more radiant. This effect significantly reduces the appearance of wrinkles and gives the skin a youthful glow.

• Application Process and Duration

Aesthetic filler application is generally performed in an outpatient setting by a doctor or specialist aesthetician. Before the procedure, the patient’s skin structure, expectations, and medical history are evaluated. The treatment area is cleaned, and a local anesthetic cream is applied to minimize pain.

The filler substance is then injected beneath the targeted skin using special fine-tipped needles or cannulas. The duration of the procedure varies depending on the treated area and the amount of filler used, but it is generally completed within 15 to 60 minutes. It is usually possible to return to daily life immediately after the procedure.

The duration of filler results varies according to the substance used, the treatment area, and the person’s metabolism. Results generally last between 6 months and 2 years. At the end of this period, the filler substance is naturally absorbed by the body, and the procedure can be repeated.

What Are the Types of Aesthetic Fillers?

The world of aesthetic fillers is quite broad, and various filler substances are available for different needs. Hyaluronic acid-based fillers are the most commonly used, but different formulations such as calcium hydroxyapatite, polycaprolactone, and polylactic acid are also available. Each has its own distinctive properties, mechanisms of action, and areas of application.

Hyaluronic Acid (HA) Fillers

Hyaluronic acid is a polysaccharide naturally found in the human body. It is abundant in the skin, joints, and eyes. Its main function is to bind water and provide moisture and volume to tissues. The hyaluronic acid used in aesthetic fillers is synthesized in a laboratory and made longer-lasting through a process called cross-linking.

• Advantages:

The risk of allergic reactions is very low because it is fully compatible with the body. It provides a natural appearance in the injected area. In an undesirable situation, it can be dissolved and reversed using the hyaluronidase enzyme. Varieties with different viscosities and degrees of cross-linking allow for a wide range of applications. * It adds vitality to the skin through its moisturizing effect.

• Areas of Use:

Filling deep wrinkles such as nasolabial lines and marionette lines. Adding volume to the lips and defining their contour. Adding volume to the cheeks and defining the cheekbones. Filling under-eye hollows. Nose aesthetics, also known as non-surgical rhinoplasty. Defining the jawline and shaping the chin tip. * Lifting the eyebrows and softening forehead lines.

• Brands: There are many different brands and product ranges, such as Juvéderm, Restylane, Belotero, and Teosyal. Each brand offers products with different properties, such as softer, firmer, or more flexible formulations.

Calcium Hydroxyapatite (CaHA) Fillers

Calcium hydroxyapatite is a mineral naturally found in bones and teeth. The form used in aesthetic fillers consists of microscopic CaHA crystals suspended in a gel base. These fillers have a denser structure than hyaluronic acid fillers and offer a longer-lasting effect.

• Advantages:

It stimulates natural collagen production in the skin, known as neocollagenesis. It provides a firmer and more defined skin texture. It offers long-lasting results, generally 12–18 months. It can create a bone-like support effect.

• Areas of Use:

Treatment of deep wrinkles and lines. Defining the cheekbones. Shaping the jawline. Reducing signs of aging on the hands. * It is generally preferred in the lower and middle areas of the face.

• Brands: Radiesse is the best-known CaHA filler brand.

Polylactic Acid (PLA) Fillers

Polylactic acid is a synthetic, biodegradable, and biocompatible polymer. It naturally breaks down over time in the body and is safely absorbed. Rather than providing immediate volume after injection, PLA fillers offer lasting improvement by gradually stimulating collagen production in the skin. For this reason, they are also referred to as a “youth vaccine” or “collagen stimulator.”

• Advantages:

It triggers long-term collagen production in the skin. It provides more natural and lasting fullness and firmness over time. * It generally requires more than one session.

• Areas of Use:

Restoring general volume loss in the face. Tightening sagging skin. Supporting the treatment of deep wrinkles. It is generally applied to broad areas of the face.

• Brands: Sculptra is the best-known PLA filler brand.

Polycaprolactone (PCL) Fillers

Polycaprolactone is a biodegradable and biocompatible polymer. Like PLA, PCL fillers also work by stimulating collagen production over time. However, PCL breaks down more slowly than PLA and provides longer-lasting collagen stimulation. It is generally found in the form of PCL microspheres suspended in a gel base.

• Advantages:

It provides long-lasting collagen stimulation. An increase in skin firmness and fullness is observed. * Its effects can generally last for 18–24 months.

• Areas of Use:

Treatment of deep wrinkles and volume loss. Skin rejuvenation and tightening. * It can be effective in the middle and lower areas of the face.

• Brands: Products such as Ellansé are PCL-based fillers.

Fat Grafting (Lipofilling)

Although technically not a filler substance, injecting fat tissue taken from the patient’s own body into specific areas of the face after special processing is also a method of adding volume. This is one of the most natural filling methods because it uses the patient’s own tissue entirely.

• Advantages:

It is a completely natural method, and there is no risk of allergy. It can provide permanent results. * It may improve skin quality.

• Disadvantages:

It is a more invasive procedure and requires liposuction. Some of the injected fat may be absorbed over time, so more than one session may be necessary. * The survival rate of fat cells is variable.

• Areas of Use: Large-scale volume loss and areas such as the cheeks, lips, and under-eye region.

Considerations When Choosing a Filler

When deciding which type of filler is most suitable for you, it is important to consider a number of factors. These include your expectations, the area to be treated, the condition of your skin, your allergy history, and your doctor’s recommendations.

• Area to Be Treated: Softer and more flexible HA fillers are preferred for the lips, while CaHA or denser HA fillers may be used for areas such as the cheekbones that require a firmer and more supportive structure.
• Expectations: Do you want an immediate increase in volume, or natural fullness that develops over time? HA fillers may be more suitable for immediate results, while PLA or PCL fillers may be more appropriate for results that develop gradually through collagen stimulation.
• Duration of Results: Some fillers last for 6–12 months, while others may remain effective for up to 2 years. The duration of results may also be a selection criterion according to your needs and expectations.
• Reversibility: Hyaluronic acid fillers can be dissolved using the hyaluronidase enzyme. This is not possible or is much more difficult with other filler types. This is an important advantage in the event of possible complications.
• The Doctor’s Experience and Expertise: One of the most important factors is the experience and expertise of the doctor who will perform the filler application. Your doctor will determine the most appropriate filler substance and application technique for you.

Risks and Side Effects of Aesthetic Filler Applications

As with every medical procedure, aesthetic filler applications have certain potential risks and side effects. Although most side effects are temporary and mild, more serious complications may rarely occur. Knowing these risks and discussing them openly with your doctor allows you to make an informed decision.

Possible Side Effects

• Swelling: Mild to moderate swelling in the injection area after the procedure is quite common. It generally resolves within a few hours to a few days.
• Bruising (Ecchymosis): Small bruises may occur when fine needles come into contact with blood vessels. These bruises generally disappear within a few days.
• Redness: Temporary redness may occur in the injection area.
• Pain or Tenderness: Mild pain or tenderness may be felt in the treatment area. Local anesthetic creams and lidocaine contained in fillers reduce this condition.
• Lumps or Irregularities: Rarely, small swellings or irregularities may occur as a result of the filler substance not being distributed evenly beneath the skin. This condition can generally be corrected with massage or hyaluronidase.
• Itching: Mild itching may be felt in the treatment area.

Rare Serious Complications

• Infection: As with every injection procedure, there is a risk of infection if sterilization rules are not followed. This risk is minimized when the procedure is performed in an appropriate clinical environment by an experienced practitioner.
• Allergic Reaction: The risk of an allergic reaction to hyaluronic acid fillers is very low. However, an allergy may develop to another substance in the filler’s contents or to anesthetics.
• Injection of Fillers Into Blood Vessels (Vascular Occlusion): This is the most serious and rare complication. Accidental injection of the filler substance into a blood vessel may cause vascular occlusion. This may lead to tissue necrosis, meaning tissue death, blindness, particularly in procedures around the eyes, or, very rarely, permanent damage. Therefore, it is vitally important that filler applications are performed by an experienced doctor with advanced anatomical knowledge.
• Granuloma Formation: Small hard nodules may form as a result of an inflammatory reaction produced by the body against a foreign substance.
• Asymmetry: This is the condition in which both sides do not appear equal after the procedure. It can generally be corrected.

Measures to Reduce Risks

• Choosing a Doctor: Be sure to choose a medical doctor, such as a dermatologist or plastic surgeon, who is experienced in aesthetic filler applications. Make sure the clinic is hygienic.
• Providing Information: Inform your doctor completely about your medical history, medications you use, and allergies.
• Realistic Expectations: Understand that fillers are not miraculous solutions and provide limited and temporary effects.
• Following Post-Procedure Instructions: Carefully follow the post-procedure care instructions provided by your doctor, such as not wearing makeup, not massaging the area, and avoiding extreme heat or cold.
• Knowing the Signs of Complications: Contact your doctor immediately if you experience signs of serious complications such as severe pain, changes in skin color, including whitening or bruising, or changes in vision.

What Should Be Considered Before and After Aesthetic Filler Application?

The success and safety of aesthetic filler application depend not only on the procedure itself but also on the precautions taken before and after it. Proper preparation and care both help you achieve better results and minimize possible side effects.

Considerations Before the Application

• Detailed Consultation With the Doctor: Before the application, discuss your expectations, concerns, and medical history with your doctor in detail. Obtain information about which filler substance will be used, why it is preferred, the expected results, and possible risks.
• Avoiding Blood-Thinning Medications: Avoiding non-steroidal anti-inflammatory drugs, known as NSAIDs, such as aspirin and ibuprofen, as well as certain herbal supplements, such as fish oil, vitamin E, and ginkgo biloba, approximately one week before the procedure may help reduce the risk of bruising. Never discontinue medications you use without consulting your doctor.
• Limiting Alcohol Consumption: Reducing or stopping alcohol consumption 24–48 hours before the procedure may lower the risk of bruising.
• Keeping the Skin Clean: It is important for the treatment area to be free of makeup and clean. Your doctor may recommend a special cleanser.
• Providing Information If There Is a Cold Sore or Infection: If there is an active cold sore or another skin infection in the treatment area, it may be necessary to postpone the procedure or inform your doctor and receive preventive treatment.
• Planning: Considering that mild swelling or bruising may occur after the procedure, plan to have filler treatment at least 1–2 weeks before an important social event.

Considerations After the Application

• Keeping the Area Clean: Keep the area clean after the procedure as recommended by your doctor. Avoiding makeup for the first 6–12 hours is generally recommended.
• Avoiding Massage: Unless specifically instructed by your doctor, avoid massaging the injection area. Incorrect massage may cause the filler substance to move out of place or lead to undesirable results.
• Protection From Excessive Heat and Sun: Avoid excessively hot environments such as Turkish baths, saunas, hot showers, and tanning beds, as well as direct sunlight, during the first few days after the procedure. These conditions may increase swelling.
• Avoiding Strenuous Exercise: Avoid activities that raise blood pressure, such as intense exercise and heavy lifting, during the first 24–48 hours after the procedure. This reduces the risk of bruising and swelling.
• Drinking Plenty of Water: Since hyaluronic acid fillers have water-retaining properties, drinking plenty of water may help the filler settle better and keep the skin hydrated.
• Preventive Treatment for Cold Sores: If you have lip filler and are prone to cold sores, your doctor may prescribe preventive antiviral medication.
• Follow-Up Appointment: Attending the follow-up appointment recommended by your doctor is important for detecting possible problems early.
• Contacting the Doctor in Cases of Severe Pain or Symptoms: Contact your doctor immediately if you notice unusual symptoms such as severe pain, whitening of the skin, or vision problems after the procedure.

Frequently Asked Questions