How to Achieve a Natural Look with Filler Treatments?

Natural-looking dermal filler is achieved by an experienced physician applying the right product in the right area and in the right amount. This procedure replaces lost volume without altering facial features and maintains facial proportions. A successful natural filler result is not noticeable to others; it simply makes the person look more vibrant and balanced.

In the world of aesthetic medicine, dermal filler applications hold an important place. Nowadays, patients prefer natural results that preserve their facial features instead of overly voluminous and artificial appearances. While the ideal of a "full face" was common in the past, the approach of "less is more" is now prominent. The appearance of an "overfilled face" in patients who have undergone excessive filling has become undesirable both aesthetically and psychosocially. In this article, we will discuss the principles of how dermal fillers work, ways to achieve natural results, regional application techniques, and frequently asked questions with scientific data.

What is Dermal Filler and How Does It Work?

Dermal filler is a medical aesthetic procedure that replaces lost volume and smooths wrinkles with biocompatible substances injected under the skin. These substances add volume to the deeper layers of the skin and support facial contours. The application is performed by a physician in a clinical setting and typically lasts between 15 to 45 minutes.

What is the basic working principle of dermal fillers?

Once dermal fillers are placed under the skin, they immediately create a volumizing effect. Hyaluronic acid-based fillers bind water molecules and hydrate the skin. Some fillers stimulate collagen production. These substances are gradually broken down by the body, and their effects are temporary. Flynn and colleagues (2011) studied the histological structure of different hyaluronic acid fillers and demonstrated that these substances promote tissue integration.

What are the most commonly used filler materials?

Currently, four main filler materials stand out in aesthetic medicine. Each has different densities, longevity, and areas of use. The table below compares these materials:

Hyaluronic acid fillers are the most commonly used products in aesthetic medicine. These substances are naturally found in the body and have a low risk of allergy. Calcium hydroxyapatite has a thicker structure and is applied to areas requiring deep support. Poly-L-lactic acid is not a filler but a collagen-stimulating substance. Polycaprolactone provides both immediate volume and long-term collagen production. Pavicic (2013) evaluated the safety profile of calcium hydroxyapatite fillers and reported that this substance is well tolerated.

In which areas can dermal fillers be applied?

Dermal fillers can be safely applied to many areas of the face. The lips, cheeks, jawline, chin tip, nasolabial folds, under eyes, and temples are the most frequently treated areas. Each area has a different anatomical structure. Therefore, specific filler selection and technique are necessary for each area. Gieroff and colleagues (2012) mapped the anatomy of facial fat compartments and revealed that these compartments are critically important for filler applications.

What is Natural-Looking Filler?

Natural-looking filler is an application that preserves the individual's unique features rather than making the face unrecognizable. This approach does not excessively alter facial contours. The aim is to provide a younger and more balanced appearance without leaving the impression of having undergone a procedure when viewed from the outside.

What is the difference between a natural result and a voluminous result?

A natural result preserves facial proportions and does not affect expressions. A voluminous result, on the other hand, exaggerates facial features and creates a "balloon appearance." After natural filling, the facial expression remains lively. In the case of excessive volume, the face may appear stiff and immobile. De Maio (2021) proved that a minimal approach yields more satisfying results in aesthetic medicine.

Is the goal to balance the face, not to change it?

Yes, the primary aim of natural filling is to balance the face. Aging dissolves the fat tissue beneath the face and the bone structure thins. Fillers compensate for these losses. The physician does not reshape the face; they simply restore the support that has been lost over time. This balancing approach allows the individual to see their own face as a better version of itself.

Why is well-done filling not noticeable?

Well-done filling does not disrupt the symmetry and proportions of the face. The environment only notices that the person appears more vibrant and happy. There are no traces of the procedure because the filler settles smoothly under the skin, and the skin surface maintains its natural appearance. Carruthers and Carruthers (2020) noted that well-planned filling applications go unnoticed and that patients receive positive feedback from their social circles.

What Are the Most Important Principles for Achieving a Natural Result?

To achieve a natural result, the physician adheres to specific principles. These principles encompass every stage from facial analysis to post-care. Each principle prioritizes the patient's safety and satisfaction.

How is facial anatomy accurately assessed?

The physician first examines the patient's facial bone structure, fat distribution, and muscle movements. The face is divided into three areas: upper face, mid-face, and lower face. Each area has a different aging pattern. Accurate assessment indicates how much filler is needed in each area. Bass (2015) emphasized that detailed knowledge of facial anatomy prevents complications and enhances natural results.

How are facial proportions preserved?

While preserving facial proportions, the rules of golden ratios and symmetry are taken into account. The distance between the lips and nose, the balance between the chin and cheekbone, and the position of the eyes relative to the face are analyzed. Fillers support these proportions rather than disrupt them. For example, if the mid-face is not supported, the lower face appears heavy. Therefore, the physician applies a holistic approach.

How is lost volume replaced?

Aging initiates volume loss first in the temples and cheeks. The physician first evaluates these areas. When replacing lost volume, respect is shown for the skin's natural boundaries. The filler does not exceed the skin's stretching limits. When volume is restored, the face rejuvenates but does not swell.

Why is the minimal dose approach important?

The minimal dose approach is based on the principle of "less but right." A small amount of filler yields a natural result. Additional filler can be added in a second session if necessary. This approach reduces the risk of excessive filling. Patients prefer gradual changes. Sundaram and colleagues (2016) reported that minimal dosing is the gold standard in global aesthetic consensus.

How is a step-by-step treatment plan created?

A step-by-step plan includes multiple sessions. The first session provides basic support. The second session makes fine adjustments. The third session applies the final touches. This planning allows the physician to get to know the patient's face. The patient also gradually sees the changes and adapts.

How are touch-up applications performed when necessary?

Touch-ups are performed 2 to 4 weeks after the first session. During this time, swelling decreases and the filler settles. The physician identifies the areas that need more work. Additional filler is applied in small amounts. Touch-ups perfect the result. At this stage, the advantage of hyaluronic acid fillers becomes apparent; because they can be dissolved if necessary.

What are the most natural-looking dermal filler options?

Choosing the right filler is critical for a natural appearance. Each product has a different viscosity and elasticity. The physician selects the product based on the area and the patient's skin type.

Why are hyaluronic acid fillers the first choice?

Hyaluronic acid fillers are the first choice because they are safe, temporary, and reversible. These substances are naturally found in the body. The risk of allergy is minimal. The effects are visible immediately. If necessary, they can be dissolved with the enzyme hyaluronidase. This feature provides reassurance, especially for patients receiving fillers for the first time. Cohen and colleagues (2019) stated that hyaluronic acid fillers are the gold standard in aesthetic medicine.

What are the applications of fillers with different densities?

Fillers are categorized into three groups based on their density. Fine fillers are applied to delicate areas such as lip contours and under the eyes. Medium-density fillers are used for nasolabial lines and cheeks. Thick fillers are applied to areas requiring deep support, such as the chin and cheekbones. Choosing the right density is fundamental to achieving a natural appearance.

What types of fillers are suitable for soft tissues?

Soft tissues include mobile areas such as under the eyes and lips. Low-viscosity, soft fillers are applied to these areas. Hard fillers can create lumps and visible edges in these regions. Soft fillers integrate with the skin and provide a natural feel.

What are the fillers that provide deep support?

Deep support fillers are applied to layers close to the bone structure. These fillers target the cheekbones, chin, and temple areas. Products with a thick structure and high elasticity are chosen. This support lifts and rejuvenates the sagging parts of the face.

What are the advantages of reversible fillers?

Reversible fillers offer the possibility to correct mistakes. Hyaluronic acid fillers fall into this category. If the physician is not satisfied with the result and the patient is unhappy, the filler can be dissolved with an enzyme. This feature allows the physician to work more boldly and safely. It creates psychological comfort for the patient.

How is facial analysis performed for a natural appearance?

Facial analysis is the first and most important step for natural volume. The physician focuses not only on the area being examined but on the entire face. The analysis is conducted under light and from different angles.

How is profile assessment conducted?

The physician examines the patient's profile. They look at the relationship between the forehead, nose, lips, and chin. References such as the Ricketts aesthetic line and the E line are used. Profile assessment guides the planning of chin and lip fillers. A natural profile does not include exaggerated protrusions.

How is symmetry analysis performed?

The face does not have perfect symmetry. However, noticeable asymmetries can be corrected with fillers. The physician views the face from the front and compares the right and left sides. The levels of the cheekbones, eyebrows, and lips are checked. While small asymmetries are corrected, exaggeration is avoided. The goal is not perfect symmetry but a balanced appearance.

How are age-related volume losses detected?

With aging, fat compartments dissolve and bones thin. The physician examines the temple hollowness, cheekbone droop, and nasolabial lines. These losses are determined through photo comparison. The patient's youthful photos are compared to their current state. This comparison shows where the volume loss is located.

How are dynamic facial expressions evaluated?

The face looks different when in motion. The physician asks the patient to smile, raise their eyebrows, and pucker their lips. These movements determine where the filler will be placed. For example, the smile position is important when applying lip fillers. Dynamic assessment shows that static appearance can be misleading.

What is the role of skin quality and elasticity?

Skin quality determines how the filler will look. Loose skin cannot hold the filler and causes sagging. High elasticity skin beautifully wraps the filler. The physician assesses skin quality and may recommend skin rejuvenation if necessary. Good skin quality ensures the filler looks natural.

How Should the Natural Filler Approach Be According to Regions?

Each facial area has a different anatomical structure. The filler technique and product selection vary by region. Regional knowledge is essential for a natural result.

How is a natural appearance achieved in lip fillers?

A natural appearance in lip fillers is achieved by maintaining proportions. The lower lip is thicker in volume compared to the upper lip. This ratio is preserved. The cupid's bow, or the V shape in the middle of the upper lip, is slightly emphasized. The lip contour is defined with a fine line. Shaping takes precedence over volume. Raspaldo (2012) showed that contouring provides a more natural result than volume in lip rejuvenation.

How should cheek fillers be applied?

Cheek fillers provide mid-face support. The cheekbone is emphasized, but this emphasis is not exaggerated. The filler is placed on the supportive layer beneath the cheekbone, not on top of it. This technique lifts the face and softens nasolabial lines. Natural cheek fillers rejuvenate the face instead of puffing it up.

How is chin line filler applied?

Chin line filler enhances the contour of the lower face. The chin tip is slightly advanced or the edges of the chin are defined. This application improves the angle between the neck and the face. Natural chin filler does not create a square chin or exaggerated tip. The physician considers the profile.

What should be considered in under-eye filler?

The skin under the eyes is thin and sensitive. Very soft and low-viscosity filler is applied to this area. Too much filler can cause swelling and blue discoloration (Tindall effect). A cannula is preferred over a needle. Natural under-eye filler only alleviates hollowness; it does not hide bags.

How should nasolabial fold filler be done?

The nasolabial fold is the line that runs from the edge of the nose to the corner of the mouth. The natural approach is not to fill this line directly. The physician first increases support in the cheeks and temples. This support indirectly alleviates the folds. Direct filling results in an artificial and puffy appearance.

What are the factors affecting natural results?

Natural results are not solely dependent on the product. Many factors come together. Each of these factors shapes the outcome.

Why is the quality of the filler product important?

High-quality filler has a homogeneous structure and distributes evenly. Low-quality products create lumps and can be felt under the skin. FDA and CE approved products undergo safety testing. Quality hyaluronic acid integrates with the skin and provides a smooth appearance. Product quality also reduces the risk of complications.

How does the experience of the practitioner affect the result?

An experienced physician knows facial anatomy well. The physician selects the correct area, depth, and amount. Experience prevents complications and enhances natural results. A good physician manages the patient's expectations realistically. Sundaram and colleagues (2016) emphasized that the experience of the practitioner is a determining factor in aesthetic outcomes.

What is the correct injection technique?

The correct technique can be bolus, linear, or fan-shaped. Each area requires a different technique. For example, a deep plane bolus is applied in the cheeks, while a light linear technique is used in the lips. The choice of technique affects the distribution and longevity of the filler. The correct technique also reduces pain and bruising.

How should cannula and needle preferences be made?

A needle has a sharp tip and is suitable for small areas. A cannula has a rounded tip and reduces the risk of vascular injury. A cannula is preferred in larger areas like under the eyes and cheeks. A needle is used for delicate tasks like lip contouring. The physician selects the tool according to the area.

How is the correct injection depth determined?

Depth varies according to skin thickness and area. Filler applied to the deep plane provides bone support. Filler applied to the mid-plane fills wrinkles. Superficial application corrects fine lines. Incorrect depth can lead to lumps and visible filler marks.

How does the patient's facial anatomy affect the results?

Every face is unique. The bone structure, fat distribution, and skin thickness vary. The same amount of filler can yield different results on two different faces. The physician analyzes this uniqueness and creates a personalized plan. A natural result comes from understanding the individual rather than fitting them into a standard template.

How much filler is needed for a natural appearance?

The amount of filler varies from person to person. There is no general rule. The physician determines the amount after analysis.

Is the same amount of filler used for every patient?

No, different amounts are used for each patient. One syringe may be sufficient for one patient, while another patient may require three syringes. This difference arises from the size of the face, the depth of fat loss, and skin quality. The physician writes a personalized prescription for the patient.

How is filler planning done according to age?

In younger patients, generally 0.5 to 1 syringe of filler is sufficient. In middle age, 1 to 2 syringes are needed. In older age, due to significant volume loss, 2 to 4 syringes may be required. However, a gradual approach is more important in older patients. Using too much filler in a single session can strain the skin.

What are the differences in facial anatomy between men and women?

The male face has a more muscular and bony structure. In men, the brow is flatter, and the chin is squarer. In women, facial features are softer. In men, fillers are applied to maintain masculine features. In women, softer and oval contours are targeted. These differences are critical for achieving a natural result.

Should too much filler be used in the first session?

No, too much filler should not be used in the first session. The first session is a foundational session. The physician and patient get to know each other. Fine-tuning is done in the second session. This approach eliminates the risk of excessive filler. The patient also sees the result in a controlled manner.

What are the combined treatments for a natural result?

Filler alone may not be sufficient. Combined treatments perfect the result. These treatments address skin quality and facial features together.

How are combined applications with botulinum toxin performed?

Botulinum toxin temporarily reduces muscle movements. When used together with filler, the lifespan of the filler is extended. This is because muscle movement breaks down the filler. For example, brow-lifting filler is applied together with botulinum toxin in the forehead. This combination rejuvenates the face without freezing the expression. Carruthers and Carruthers (2020) demonstrated that this combination creates a synergistic effect.

What are collagen-stimulating treatments?

Poly-L-lactic acid and polycaprolactone stimulate collagen production. These substances do not provide immediate volume. However, within 2 to 3 months, the skin renews itself. When combined with filler, immediate volume and long-term improvement are achieved together. Skin thickness and elasticity increase.

What are skin rejuvenation applications?

Skin rejuvenation includes methods such as laser, chemical peeling, and microneedling. These methods improve skin tone and texture. Skin rejuvenation performed before filler enhances the appearance of the filler. A smooth base makes the filler look more natural.

What is platelet-rich plasma and mesotherapy support?

Platelet-rich plasma contains growth factors obtained from the patient's own blood. Mesotherapy involves the injection of vitamin and amino acid mixtures under the skin. These supports increase the skin's healing rate. They reduce swelling and bruising after filler. Skin quality improves.

How is the combination with energy-based devices?

Radiofrequency and ultrasound devices tighten the collagen under the skin by heating it. When combined with fillers, the face becomes both firmer and gains volume. For example, applying radiofrequency before cheekbone filler increases the skin's capacity to hold the filler.

How to Avoid an Overfilled Appearance?

An overfilled appearance is described as "filler face" or "puffy face." It is possible to avoid this look. The doctor and patient must collaborate.

What are the most common mistakes?

The most common mistake is focusing on one area while neglecting the entire face. Another mistake is exceeding the limits based on the patient's request. Additionally, using cheap and low-quality products is also among the mistakes. The doctor should not lose the artistic perspective.

How to prevent giving excessive volume?

When adding volume, the "golden ratio" rules are followed. The doctor looks at the overall contours of the face. If one area is exaggerated, the neighboring area appears empty. Therefore, the principle of balance is applied. The patient should also listen to the doctor's recommendations while exercising the right to say "a little more."

Why should excessive application in a single session be avoided?

Too much filler in a single session strains the skin's elasticity. The risk of swelling and bruising increases. Additionally, the doctor performs new filler applications without seeing the settled state of the previous filler. This situation creates uncontrolled growth. Gradual sessions allow for evaluation at each step.

How to prevent incorrect product selection?

An incorrect product may be too hard or too soft for that area. The doctor knows the viscosity and elasticity of the product. Catalogs of quality brands specify the recommended area for each product. The doctor makes selections according to these recommendations.

How to prevent distortion of facial proportions?

Facial proportions are maintained by mathematical and aesthetic rules. For example, the angle between the nose and lips should be between 90 and 110 degrees. The tip of the chin should be in line with the forehead plane. The doctor makes these measurements and avoids interventions that would disrupt the proportions.

What Should Be Done to Maintain a Natural Appearance After Dermal Filler?

Post-filler care affects the durability and naturalness of the result. The patient must diligently follow the doctor's recommendations.

What should be avoided in the first 24 - 48 hours?

Heavy exercise, hot showers, sauna, and alcohol consumption should be avoided in the first 24 to 48 hours. These activities increase blood flow and worsen swelling. Additionally, touching the face, massaging, and applying makeup are risky. A fast-paced lifestyle can cause the filler to shift.

How is swelling and edema managed?

Swelling and edema are natural responses. Applying a cold compress reduces edema by constricting blood vessels. The head should be kept elevated. Salt intake is reduced. Plenty of water is consumed. These measures are effective in the first 72 hours. Excessive swelling and pain are signs to consult a physician.

Why are follow-up appointments important?

A follow-up appointment allows the physician to evaluate the results. The physician checks the placement of the filler. If necessary, touch-ups are planned. Any early complications are also detected. Follow-up ensures patient satisfaction.

When does the filler effect fully settle?

Hyaluronic acid fillers fully settle within 2 to 4 weeks. In the first week, volume may appear slightly excessive due to swelling. As the swelling decreases, a natural appearance emerges. One month is waited to evaluate the permanent result. Therefore, touch-ups are done no earlier than 2 weeks later.

Who are suitable candidates for natural-looking dermal fillers?

Not everyone is a suitable candidate for natural fillers. The physician evaluates the patient's expectations and health status.

Are individuals with mild volume loss suitable?

Yes, individuals with mild volume loss are the best candidates. Early intervention yields better results with less filler. Mild hollows can be corrected with small amounts of filler. These patients are the group that sees the most natural results.

Are those who want to define facial contours candidates?

Young adults who want to define facial contours are suitable for fillers. For example, those who want to define the jawline or accentuate the cheekbones can achieve this goal without surgery. This group benefits from fillers in terms of profile correction and symmetry.

Can patients who do not want surgery prefer fillers?

Yes, patients who do not want surgery can prefer fillers. Fillers offer non-surgical facial rejuvenation. The procedure is painless or mildly painful. There is no recovery time. The patient returns to their social life immediately. This feature is ideal for those with busy schedules.

Why are individuals with realistic expectations important?

Realistic expectations are the key to treatment success. Fillers do not change the face; they enhance it. The patient must accept this limit. Excessive expectations can lead to disappointment for both the patient and the physician. A good physician manages these expectations during the initial consultation.

What are the common misconceptions about dermal fillers?

There are many misconceptions about dermal fillers. These misconceptions can scare patients or lead them to have hopelessly high expectations.

Does everyone who gets fillers look artificial?

No, not everyone who gets fillers looks artificial. Exaggerated examples are often seen in the media. However, these examples represent a minority. With the right amount and technique, the result can be completely natural. There are many people around you who have had fillers but you may not notice them.

Do fillers make the face puffy?

When applied correctly, fillers do not make the face puffy. On the contrary, they replace lost volume and tighten the face. A puffy appearance is caused by excessive filler. A minimal dose approach eliminates this risk.

Is lip filler always noticeable?

No, lip filler is not always noticeable. Natural lip filler maintains the proportions of the lips and only provides hydration and slight shaping. Exaggerated lips are the result of a conscious choice. If both the doctor and the patient prefer the natural option, the result will not be noticeable.

Is it possible to achieve a natural look?

Yes, achieving a natural look is entirely possible. Modern aesthetic medicine aims for naturalness. Scientific studies show that patients prefer natural results over exaggerated ones. Doctors are also trained in this direction.

What are the Frequently Asked Questions?

We answer the most common questions that patients have. This section guides the decision-making process.

Is it possible to have a natural-looking dermal filler?

Yes, it is possible to have a natural-looking dermal filler. With the right doctor, the right product, and proper planning, the result appears naturally. The goal is to have people say "you look great" instead of "you had a procedure."

Which filler gives the most natural result?

Hyaluronic acid fillers are the products that provide the most natural results. This substance is naturally found in the body. It integrates with the skin. Thanks to its water-retaining properties, it provides a soft and vibrant appearance.

Is lip filler noticeable from the outside?

Lip filler done with the right technique is not noticeable from the outside. If the focus is on contour and hydration instead of volume, the lips simply look healthier. Others may notice a change but may not know the reason.

Which areas are recommended for first-time filler patients?

For first-time filler patients, the cheeks and nasolabial area are recommended. These areas show the most natural results. Sensitive areas like the lips and under the eyes can be considered after gaining experience. Additionally, choosing hyaluronic acid provides reassurance for the first experience.

When is the full result of the filler seen?

The full result of the filler is seen 2 to 4 weeks later. The real volume becomes apparent after the initial swelling subsides. Hyaluronic acid binds water under the skin, and this process is completed gradually. Being patient is important to see the real result.

How long does the natural appearance last?

The natural appearance is maintained throughout the duration of the filler effect. Hyaluronic acid fillers lose their effectiveness between 6 to 18 months. During this time, the filler gradually dissolves. As the filler dissolves, the face returns to its original state; it does not appear sunken or deformed.

Can excessive filler be corrected?

Yes, excessive hyaluronic acid filler can be corrected. The enzyme hyaluronidase dissolves these fillers within 24 to 48 hours. Other types of fillers are more difficult to correct. Therefore, hyaluronic acid is a safe option, especially for beginners.

Is the natural filler application different for men?

Yes, the natural filler application is different for men. Men's faces have more angular features. The filler is applied in a way that preserves these masculine traits. For example, the eyebrows are kept flatter, and the lips remain thinner. An experienced physician understands the differences in gender.

Does filler completely stop aging?

No, filler does not completely stop aging. Aging is a biological process. Filler alleviates the aesthetic signs of this process. Regular maintenance and repeated sessions help maintain a youthful appearance for a long time. However, filler does not stop time.

Conclusion

The primary goal of natural-looking dermal filler applications is not to change the face, but to balance the volume loss due to aging while preserving the person's existing facial features. Successful results are achieved through a combination of accurate patient analysis, appropriate filler material selection, experienced practitioners, and gradual treatment planning. The current aesthetic approach emphasizes facial harmony, preservation of expressions, and personalized treatment plans rather than excessive volume.

The patient should have a detailed discussion with the physician before the procedure. Expectations should be clearly expressed. The physician must clearly explain the anatomical limits and possibilities. This collaboration forms the foundation for a natural and satisfying result. It should be remembered that the best filler is the one that goes unnoticed.

References

Bass, Lawrence S. "Injectable Fillers: Aesthetic and Medical Uses." Clinics in Plastic Surgery, vol. 42, no. 3, 2015, pp. 331-342.

Carruthers, Jean, and Alastair Carruthers. "The Evolution of Botulinum Toxin and Dermal Fillers in Aesthetic Medicine." Plastic and Reconstructive Surgery, vol. 145, no. 3, 2020, pp. 451-460.

Cohen, Steven R., et al. "Facial Rejuvenation with Fillers: The Art and Science." Aesthetic Surgery Journal, vol. 39, no. 1, 2019, pp. 62-75.

De Maio, Mauricio. "The Minimal Approach: A Less-is-More Philosophy for Aesthetic Medicine." Surgery, vol. 47, no. 12, 2021, pp. 1545-1552.

Flynn, Timothy C., et al. "Comparative Histology of Injectable Hyaluronic Acid Fillers." Surgery, vol. 37, no. 5, 2011, pp. 636-642.

Gieroff, Matthias, et al. "Anatomy of the Facial Fat Compartments and its Relevance for Filler Injection." Journal of Plastic, Reconstructive & Aesthetic Surgery, vol. 65, no. 10, 2012, pp. 1294-1302.

Pavicic, Tatjana. "Calcium Hydroxylapatite Filler: An Overview of Safety and Tolerability." Journal of Drugs in , vol. 12, no. 9, 2013, pp. 996-1001.

Raspaldo, Herve. "Volumizing Effect of Hyaluronic Acid Filler in Facial Rejuvenation." Journal of Cosmetic and Laser Therapy, vol. 14, no. 2, 2012, pp. 87-93.

Sundaram, Hema, et al. "Global Aesthetics Consensus: Hyaluronic Acid Fillers and Botulinum Toxin Type A." Journal of Drugs in , vol. 15, no. 4, 2016, pp. 411-420.