Biostimulators (PLLA, calcium hydroxylapatite)

Biostimulator treatments use collagen-stimulating substances to target the response of the skin and its underlying support tissue. Poly-L-lactic acid (PLLA) and calcium hydroxylapatite (CaHA) are among the options we use for this purpose. When planning treatment, we distinguish skin thinning, laxity, and the areas of facial volume loss.

As you explore biostimulators, you are welcome to share which facial change you notice most. A hollow cheek, fine neck skin folds, and skin accumulating along the jawline involve different tissues. We distinguish these findings during the consultation and explain how collagen stimulation relates to your expectations. The material and treatment area we select depend on your skin structure and the distribution of volume loss.

Biostimulators and collagen stimulation

Collagen is one of the structural proteins that give connective tissue strength. With biostimulator treatments, we aim to stimulate the cells involved in collagen production. As we describe this response in the tissue’s own support structure, we also explain which layer will receive the material. A fold close to the skin and a deeper loss of support may involve different treatment targets.

The cells that produce collagen are called fibroblasts. Found in the skin’s support layer and in connective tissue, they help form the surrounding fibers and the structure between cells. Biostimulator substances are used to stimulate this cellular response. In this context, collagen does not refer to injecting ready-made collagen into the tissue.

Different materials fall under the name biostimulator. Their particles, carriers, and preparation methods affect where and how they can be used. We describe these properties separately when explaining PLLA and calcium hydroxylapatite. During the consultation, you can ask which material is being considered for your area of concern and why.

The term skin quality can include thickness, elasticity, fine folds, and surface texture. The change that bothers you may relate to only one of these features. For example, if you describe a loss of cheek volume, we show how it differs from fine surface lines during the examination. We define the intended change from collagen stimulation through that specific finding.

Changes in the skin and fat pads with age

Beneath the skin’s outer covering is a supporting layer called the dermis. Its collagen fibers contribute to tissue strength, while elastin fibers help stretched tissue return to shape. The amount and arrangement of these fibers can change with age, contributing to skin thinning and laxity. Sun exposure and individual skin characteristics also contribute to the structure seen during the examination.

Fat beneath the facial skin is arranged in separate compartments. These compartments, called fat pads, contribute to volume in the temples, cheeks, and around the eyes. With age, some may lose volume, and tissues may change position. We therefore do not treat a cheek hollow as merely a line on the skin’s surface.

The cheekbone, cheek fat, and overlying skin are different layers of the same area. Together, they create the face’s external appearance. During the examination, we look within these layers for a loss of support that a biostimulator could target. A proportion determined by bone structure and an expectation related to thinning skin may call for different interventions.

An inward hollow at the temple may suggest volume loss, while tissue extending below the jawline involves displacement and excess skin. These findings can coexist in one face. We define the treatment boundaries by examining where the hollow extends and how the skin covers it. Describing your expectations for skin support separately from the change you want in your facial contour helps make this distinction.

How is PLLA administered?

PLLA is a powder that is reconstituted with liquid before treatment. During preparation, its particles are dispersed in liquid according to the properties of the preparation being used. This preparation takes place in the clinic as part of the procedure. We place the prepared material in a deep tissue layer appropriate to the target area’s anatomy.

Our main goal with PLLA is to stimulate the tissue’s collagen production. The volume contributed by the preparation liquid is separate from the intended collagen response. When explaining treatment, we therefore focus on the area where the particles will be placed and its support needs rather than the volume of liquid. Widespread cheek volume loss and a defined line present different targets in this respect.

We examine the relationship between volume loss in the temples or cheeks and the surrounding soft tissue. A hollow may extend across a broad area or be more pronounced at a particular transition. Skin thickness and underlying fat affect the layer considered for PLLA. A fine surface fold may have a different support need beneath it.

If you would like a more defined lip border, we distinguish that expectation from widespread loss of cheek support. The treatment boundaries in a PLLA plan are selected according to the material’s particle structure and its relationship to the target tissue. We do not transfer a treatment designed for the cheek to the thin, mobile lip border. You can describe your wishes for volume, contour definition, and skin structure separately during the consultation.

Calcium hydroxylapatite and hyperdilute treatment

Calcium hydroxylapatite consists of microspheres in a gel carrier. Calcium hydroxylapatite products such as Radiesse belong to this group. Microspheres are microscopic round particles. The gel carrier provides volume support to the tissue where it is placed, while a tissue response involving collagen production develops around the particles. Direct support and collagen stimulation are therefore separate functions within the material’s structure.

The support provided by the carrier gel relates to the material’s physical structure. Collagen stimulation is the tissue’s biological response. The role of these properties in the plan changes when supporting a jawline contour or addressing neck skin structure. The way calcium hydroxylapatite is prepared is also selected according to the intended distribution.

Hyperdilute means that calcium hydroxylapatite is substantially diluted before use. Hyperdilute treatment is also colloquially called a mineral shot. Preparing the material this way is intended to address the skin’s support structure rather than volume at one particular point. Dilution also relates to how the material spreads within the tissue. Concentration and tissue layer are selected according to the structure of areas such as the neck or backs of the hands.

When you consult us about your neck or décolletage, we examine the direction of lines and the distribution of laxity. Surface skin folds and muscle bands beneath the skin are different structures. We explain the intended collagen stimulation from hyperdilute calcium hydroxylapatite through its skin target among these structures. If there is excess skin or a finding involving muscle position, we explain the intervention it requires separately.

Thin skin and a lack of underlying volume can occur to different degrees on the backs of the hands. Tendons, the structures connecting muscles to bones, and blood vessels lie beneath this covering tissue. Tissue thickness and volume distribution during the examination affect where the material can be placed. A plan for the backs of the hands is developed separately from a facial treatment plan.

Hyaluronic acid fillers and other biostimulators

Hyaluronic acid filler uses its gel structure to add volume and shape where it is placed. With biostimulators, the tissue’s collagen production response is central to the plan. The gel carrier in calcium hydroxylapatite also provides volume support. Instead of making the distinction from the word filler alone, we explain which material is being used and how it works.

Someone seeking a more defined lip border has different expectations from someone describing widespread loss of cheek support. In the first case, the shape of a particular contour and the volume of gel to be added are central. For a biostimulator option, we focus on skin characteristics, supporting tissue, and the intended collagen response. Describing the change you want before choosing a treatment name allows this distinction to be based on your own findings.

Polycaprolactone (PCL) is another material used for collagen stimulation. The connective tissue response around its particles is the basis for classifying it as a biostimulator. Carrier structures and particle properties vary among materials. PCL is mentioned here as general information; treatment selection requires consideration of the preparation’s properties and the person’s suitability.

Materials discussed under collagen stimulation may differ in their carriers and particle properties. Their preparation methods and suitable anatomical areas also relate to these features. When asking about a substance, you can ask exactly which material is being proposed for which area and tissue layer.

Treatment areas and limits

We can develop biostimulator plans for tissue support in the temples, cheeks, and jawline. The extent of hollowing at the temples, the location of cheek volume loss, and the relationship between skin and underlying structures at the jawline guide the plan. Blood vessels, nerves, and fat compartments are arranged differently in each area. We select the treatment layer according to this regional anatomy.

We also examine needs related to skin quality on the neck, décolletage, and backs of the hands within this framework. The distribution of neck laxity, the direction of skin folds on the décolletage, and the thickness of the covering tissue on the hands affect the approach. As the treatment area increases, material distribution is planned accordingly. The material for each region is selected separately.

The lips are constantly moving tissue, while the eyelids have a thin covering. PLLA and calcium hydroxylapatite are generally not suitable for adding lip volume or for the thin eyelid area. When considering a material intended for the cheeks in relation to under-eye hollowness, the overlying tissue in that area must be assessed separately. Anatomical boundaries determine the extent of treatment.

Needles and cannulas are instruments used to deliver material to the selected tissue layer. A cannula is a thin, blunt-tipped tube; a needle enters tissue with a sharp tip. We select the instrument according to regional anatomy, the target layer, and the area across which the material will be distributed. This choice does not change the biostimulator’s collagen-stimulating mechanism.

Who is a candidate, and what is examined?

If you notice thinning skin, loss of support, or laxity, we can explain the role of biostimulators in these changes during the examination. Alongside your age, we consider skin thickness and the areas where volume loss is concentrated. A cheek hollow and a neck fold in people of the same age may not reflect the same tissue feature. The layer involved in the change you expect is the starting point for the suggested approach.

We examine the face from the front, from the side, and during facial expressions to observe volume and overlying tissue in each area. The right and left cheeks may have different needs. You are welcome to share records of previous fillers and operations. They help us understand which material was placed where and how to interpret the existing tissue.

Cosmetic biostimulator treatments are postponed during pregnancy and breastfeeding. An active infection in the treatment area prevents the procedure from being performed. Autoimmune diseases, in which the immune system acts against the person’s own tissues, should be reviewed by the physician together with disease activity and current treatments. A single suitability decision cannot be applied to all these diagnoses.

A keloid is raised scar tissue that extends beyond the boundaries of a skin scar. A tendency to develop keloids and a history of a pronounced connective tissue response may affect suitability, particularly for PLLA. A known allergy to the proposed ingredient, uncontrolled systemic illnesses, and information about previous injections are also considered. Suitability is not determined by cosmetic expectations alone.

We identify the boundaries of a hollow from different viewing angles and by touch. Observing how a lower facial fold changes when the cheek tissue is supported helps distinguish the contributions of volume loss and tissue displacement. Alongside the shadow in a photograph, skin thickness and the fold at rest are part of this examination. During the consultation, you can show where the hollow that bothers you begins and ends.

Neck folds may change with head position and movement. During the examination, we distinguish surface skin folding, neck muscle bands, and excess tissue beneath the chin. We define the biostimulator’s target according to the skin and supporting tissue features among these findings. When there is pronounced excess tissue beneath the chin, we also explain options for that finding.

Volume distribution describes how full a facial area appears. Skin elasticity relates to its ability to stretch with movement and take shape again. Fine surface folds may be visible despite adequate cheek volume, or an underlying tissue deficit may be noticeable without pronounced surface folds. Recording these features separately shows whether a biostimulator consultation focuses on the skin or on broader tissue support.

A change in skin color is different from a shadow cast by a volume deficit. A dark-looking area at the temple or cheek does not always indicate a need for collagen stimulation. The skin surface and underlying tissue are examined separately. If color is a concern, its cause is explained through a skin examination of its own, separately from biostimulator material selection.

Previous treatment records provide information about both the material’s name and where it was placed. A gel used for cheek volume and a substance injected broadly into the skin may involve different layers. This information helps interpret whether fullness seen in a photograph relates to existing fat or a previous treatment. If records are unavailable, mentioning this during the consultation allows the uncertainty to be considered when deciding on a new material.

Fine lines on the cheek surface and a deep fold extending toward the corner of the mouth represent different structures. Overlying tissue characteristics are central to a surface line, while neighboring tissue volume and position also contribute to a deep fold. These areas can be examined separately during smiling and at rest. A collagen stimulation target is not determined solely by a line’s name or depth.

Planning with facelifts, Botox, and fillers

Biostimulator treatment aims to stimulate the tissue’s collagen response. Facelift surgery repositions displaced tissues and removes excess skin. If you come to us with pronounced sagging or excess skin, we explain which finding the surgical option addresses. We do not plan on the assumption that collagen stimulation will replace this anatomical intervention.

Botox may be used to target the contraction of facial expression muscles, hyaluronic acid filler for volume and shape in specific areas, and biostimulators for the collagen response. These needs may occur in separate regions of the same face. We identify the target tissue separately for forehead expression lines, lip volume, and loss of cheek support.

You can discuss forehead expression lines and cheek volume loss in the same consultation. We identify the target tissue for each area separately during the examination. Areas for added volume, regions considered for collagen stimulation, and excess skin that may call for surgery each have their own anatomical reason for inclusion in the treatment plan.