Biostimulators in Delafield
Collagen rebuilt gradually, so results look earned.
Biostimulators are injectable treatments that stimulate the body's own collagen production for gradual, natural-looking volume restoration and skin rejuvenation. Unlike traditional dermal fillers that add immediate volume, biostimulators such as poly-L-lactic acid (Sculptra) and calcium hydroxylapatite (Radiesse) work over weeks to months by triggering neocollagenesis, with results that may last two years or longer.
At a Glance
- Sculptra is FDA-approved as an injectable for correction of shallow to deep nasolabial fold contour deficiencies and other facial wrinkles[1]
- Poly-L-lactic acid stimulates fibroblasts to produce collagen, achieving skin filling and tightening effects with outcomes lasting 18-24 months or longer[5]
- In FDA clinical studies, Radiesse treatment effects lasted for one year after the first treatment session in all patients studied[2]
- Biostimulators work by providing a scaffold that prompts the skin's fibroblasts to produce new collagen, improving elasticity, firmness, and overall texture[4]
Overview
Biostimulators are a category of injectable treatments that work differently from traditional dermal fillers. Rather than adding volume directly through a gel substance, biostimulators contain biocompatible materials that stimulate the body's fibroblasts to produce new collagen. This process, known as neocollagenesis, leads to gradual improvements in skin thickness, firmness, and volume over several weeks to months following treatment.
The two primary FDA-approved biostimulator materials are poly-L-lactic acid (PLLA), marketed as Sculptra, and calcium hydroxylapatite (CaHA), marketed as Radiesse. PLLA is a biodegradable synthetic polymer that acts as a scaffold for new collagen formation, while CaHA consists of microspheres suspended in a gel carrier that provides both immediate structural support and long-term collagen stimulation.
Treatment typically involves a series of injection sessions spaced several weeks apart, allowing the body's collagen response to develop gradually. Results appear progressively over four to eight weeks after each session and may last two years or longer, depending on the product used and individual patient factors.
What to expect
- Initial consultation to discuss aesthetic goals, assess facial anatomy, and review medical history including any history of allergic reactions or autoimmune conditions
- The practitioner develops a personalized treatment plan identifying areas for injection and the number of sessions anticipated
- Before injection, the treatment area is thoroughly cleansed and topical or local anesthesia may be applied for comfort
- The practitioner reconstitutes the product according to manufacturer guidelines (for PLLA products) or prepares the syringe
- The biostimulator is injected using a needle or cannula at precise depths in the deep dermis or subcutaneous plane
- Multiple small injections are placed in a grid-like pattern across the treatment area for even distribution
- The practitioner gently massages the treated area to ensure uniform product distribution and reduce the risk of nodule formation
- Post-treatment photographs are taken for documentation
- Aftercare instructions are provided, including massage protocols specific to the product used
- Follow-up sessions are scheduled, typically at four to six week intervals, with most patients requiring two to four sessions
How a biostimulators works
- Poly-L-lactic acid (PLLA) biostimulators consist of biodegradable microparticles that are injected into the deep dermis or subcutaneous tissue. These particles act as a scaffold that triggers a controlled tissue response, prompting fibroblasts to produce new type I and type III collagen around the PLLA particles as they gradually biodegrade over months.
- Calcium hydroxylapatite (CaHA) biostimulators contain microspheres suspended in a carboxymethylcellulose gel carrier. The gel provides some immediate volumizing effect while the CaHA microspheres stimulate collagen production over time. As the carrier gel is absorbed, the microspheres serve as a scaffold for new collagen formation.
- The collagen stimulation process occurs gradually, with new collagen fibers replacing the injectable material as it biodegrades. This results in a natural-looking improvement that develops over four to eight weeks and may continue to improve with subsequent treatment sessions.
When it's recommended
- Facial volume loss due to aging (midface hollowing, temple wasting)
- Nasolabial folds (smile lines from nose to mouth)
- Marionette lines (lines from mouth corners to chin)
- Cheek contouring and volume restoration
- Jawline definition and chin augmentation
- Skin laxity and loss of firmness
- HIV-associated facial lipoatrophy (Sculptra FDA-approved indication)
- Hand rejuvenation (Radiesse FDA-approved indication)
Is a biostimulators right for you?
Reach out to learn more from Dr. Lucas Boehm.
Concerns it addresses
Recovery & aftercare
- Most patients return to normal activities immediately after treatment
- Mild swelling, redness, and tenderness typically resolve within 3-7 days
- Avoid strenuous exercise for 24-48 hours after injection
- For PLLA products, patients are typically instructed to massage the treated area for five minutes, five times per day, for five days after each session
- Avoid excessive sun or heat exposure for 48 hours after treatment
- Results develop gradually over four to eight weeks as new collagen forms
- Full results may require two to four treatment sessions spaced four to six weeks apart
Alternatives
- Hyaluronic acid dermal fillers (for immediate volume restoration)
- Botox and other neuromodulators (for dynamic wrinkles)
- Microneedling (for skin texture and mild collagen stimulation)
- Laser skin resurfacing (for skin tightening and texture)
- Surgical facelift (for significant skin laxity and volume loss)
- Thread lift (for mild to moderate skin laxity)
Related treatments
Frequently Asked Questions
- Biostimulators are injectable treatments that stimulate the body's own collagen production rather than adding volume directly like traditional dermal fillers. While hyaluronic acid fillers provide immediate results that typically last 6-18 months, biostimulators work gradually over several weeks and may produce results lasting two years or longer.
- Most patients experience only mild discomfort during biostimulator injections. Many products are mixed with lidocaine or a topical numbing agent is applied before treatment to minimize pain. Some tenderness at injection sites after the procedure is normal and typically resolves within a few days.
- Biostimulators such as Sculptra and Radiesse are FDA-approved and have well-established safety profiles when administered by qualified practitioners. As with any injectable procedure, there are potential side effects. See the risks and contraindications sections above for detailed safety information.
- Most treatment plans involve two to four sessions spaced four to six weeks apart. The number of sessions depends on the degree of volume loss, the treatment area, and individual collagen response. Your practitioner will develop a customized plan based on your goals and anatomy.
- Unlike traditional fillers that provide immediate results, biostimulators work gradually. Initial improvements may be visible within four to six weeks as new collagen begins to form. Full results typically develop over several months and multiple treatment sessions, with improvements that may last two years or longer.
- Biostimulators may not be appropriate for individuals with active skin infections, known allergies to filler components, a history of keloid scarring, certain autoimmune conditions, or those who are pregnant or breastfeeding. A thorough consultation can help determine if biostimulators are a suitable option.
Biostimulators risks & candidacy
Who should avoid this
- Known allergy or hypersensitivity to any component of the filler (poly-L-lactic acid, calcium hydroxylapatite, or carrier materials)
- Active skin infection, inflammation, or rash at the intended injection site
- History of keloid formation or hypertrophic scarring
- Bleeding disorders or current anticoagulant therapy (relative contraindication)
- Pregnancy or breastfeeding
- Active autoimmune disorders affecting the skin
Possible risks
- Bruising, swelling, or redness at injection sites (common and typically resolves within days)
- Tenderness or discomfort at the injection area
- Subcutaneous nodules or papules (can occur if product is not distributed evenly)
- Granuloma formation (inflammatory nodules, uncommon)
- Asymmetry requiring additional treatment
- Infection at the injection site (uncommon)
- Vascular occlusion from accidental injection into a blood vessel (rare but serious)
- Skin necrosis if blood supply is compromised (rare)
- Migration of product from the injection site (uncommon)
Your surgeon
Care that respects what makes you, you.
Dr. Lucas Boehm is a Wisconsin native, board-certified, fellowship-trained plastic surgeon and the founder of Consona Plastic Surgery and Aesthetics. His practice is dedicated exclusively to aesthetic surgery of the face, nose, breast, and body, with particular expertise in deep plane facelifts, rhinoplasty, and aesthetic breast surgery. He completed his undergraduate education at the University of Wisconsin–Madison, earned his medical degree from the Medical College of Wisconsin, and completed his plastic surgery residency there as well. He then pursued an Aesthetic Society-endorsed fellowship in aesthetic surgery under the mentorship of Dr. Bradley Calobrace in Louisville, Kentucky. Known for meticulous attention to detail, he approaches each case with precision and intention. His philosophy emphasizes harmony and balance – enhancing what is already beautiful while ensuring every change feels natural, thoughtful, and uniquely you.
- Board-certified
- Am. Board of Plastic Surgery
- Fellowship-trained
- Aesthetic surgery
- 12+ years
- In practice
Sources & references
This article draws on 7 sources, including government health agencies, peer-reviewed research, leading medical institutions.
Government & research
Medical institutions
Educational & general
Medically reviewed by Dr. Lucas Boehm, MD · Last reviewed: 2026-06-13