Dr.Park So Yoon Lectures on Ultracol at KALDAT 2026
Advanced Under-Eye Rejuvenation with Ultracol, RF Cannula, and Dual-Layer PDO Collagen Stimulation
Key Summary
Dr.Park So Yoon, Representative Director of Éclat de Cheongdam Clinic, delivered an Ultracol lecture at the Korean Association for Laser, Dermatology and Trichology (KALDAT).
As one of Korea’s most recognized Ultracol Key Doctors and KOLs, Dr.Park shared her long-standing clinical experience in under-eye rejuvenation using PDO powder filler and RF cannula technology.
The lecture focused on safer, more natural non-surgical improvement of under-eye dark circles, hollowness, fine wrinkles, and tissue irregularities through a dual-layer collagen-stimulating approach.
Contents
Lecture Overview
Key Question
Conclusion
Medical Background and Clinical Rationale
What Is Ultracol?
Why PDO Matters: Particle Size, Hydrophilicity, and Biodegradability
Why RF Cannula Is Important
Before & After Photo Section
Overall Summary
Clinic Information
1. Lecture Overview
Éclat de Cheongdam Clinic is pleased to share that Dr.Park So Yoon delivered a lecture on Ultracol at the Korean Association for Laser, Dermatology and Trichology (KALDAT).
The lecture topic was:
“How to Enhance the Effect of PDO Powder Using RF Cannula”
– RF Cannula for Under-Eye Dark Circles
– Introduction to Dual-Layer Technique with PDO Collagen Stimulator
Dr.Park has been using Ultracol since its early introduction in Korea and has continuously lectured on its clinical application at major domestic and international aesthetic medical conferences. She is widely recognized as one of Korea’s most experienced physicians in Ultracol-based under-eye rejuvenation.
Before the lecture, Dr.Park also visited the Ultracol booth and met with the LYV Sciences team. With Ultra V now rebranded as LYV Sciences, the company is preparing for a new stage of academic, medical, and product development. Dr.Park also heard updates about the company’s renewed medical team and the upcoming ambassador activity of actor Lee Dong Wook, which added an exciting new energy to the event.
2. Key Question
Why is Ultracol meaningful for under-eye dark circles and hollowness?
Under-eye dark circles are rarely caused by a single factor. Thin skin, vascular shadowing, structural hollowing, fine wrinkles, uneven fat distribution, tissue adhesion, and previous filler history may all contribute to a tired or aged appearance.
For this reason, Dr.Park emphasizes that under-eye rejuvenation should not be approached simply as a volume-filling procedure.
The key question is not:
“How much should we fill?”
The real question is:
“Which layer should be treated, how should the tissue be prepared, and how can collagen stimulation be designed safely and naturally?”
3. Conclusion
Ultracol is not simply a volumizing filler. It is a PDO-based collagen stimulator designed to encourage gradual tissue regeneration through controlled collagen formation.
For the under-eye area, Dr.Park uses a refined dual-layer approach using Ultracol 100 and Ultracol 200, depending on the patient’s skin thickness, hollowing, texture, and structural needs.
When combined with RF cannula technology, the treatment can help soften tissue, improve adhesion, refine irregular fat and fibrotic tissue, and support a smoother environment for collagen-stimulating treatment.
This approach is especially valuable for patients who want natural under-eye improvement without surgery and with minimal downtime during their visit to Korea.
4. Medical Background and Clinical Rationale
The under-eye area is one of the most delicate areas of the face. Even a small amount of overcorrection or irregularity can become visible.
Traditional hyaluronic acid fillers may sometimes be associated with concerns such as puffiness, bluish discoloration, overcorrection, or unnatural swelling in thin under-eye skin.
Collagen-stimulating treatments require a different philosophy. Rather than simply filling a hollow space, the goal is to improve the tissue environment and gradually restore skin quality, brightness, and structural support.
Dr.Park’s lecture at KALDAT highlighted the importance of understanding:
PDO material characteristics
Particle size and macrophage response
Hydrophilicity and cell adhesion
Biodegradability and safety
Dual-layer injection design
RF cannula-assisted tissue refinement
Prevention and management of nodular or fibrotic reactions
5. What Is Ultracol?
Ultracol is a PDO collagen stimulator.
PDO stands for polydioxanone, a biodegradable material that has long been used in absorbable medical sutures. In Ultracol, PDO is processed into microsphere particles that stimulate a controlled tissue response and support gradual collagen formation.
Unlike traditional fillers that create immediate bulk volume, Ultracol works through a regenerative mechanism. It is designed to encourage collagen formation over time, improving the appearance of hollowness, fine wrinkles, texture, and skin quality.
At Éclat de Cheongdam Clinic, Ultracol is used not as a simple filler, but as a customized collagen-stimulating treatment planned according to anatomy, skin thickness, previous procedure history, and aesthetic goals.
6. Why PDO Matters: Particle Size, Hydrophilicity, and Biodegradability
Particle Size and Macrophage Response
One of the key points in Dr.Park’s lecture was the relationship between PDO particle size and macrophages.
If particles are too small, they may be quickly engulfed by macrophages through phagocytosis and disappear too rapidly to create a meaningful collagen-stimulating effect.
Effective PDO particles should be larger than macrophages, allowing them to remain long enough to induce a controlled foreign body response and stimulate fibroblast activity and collagen formation.
This is one of the reasons why the particle design of Ultracol is clinically important.
Hydrophilicity
PDO is known to be more hydrophilic than some other collagen-stimulating materials such as PLLA or PCL.
Hydrophilicity can increase cell adhesion, and improved cell adhesion may support stronger collagen-stimulating activity. This is one of the important reasons why PDO can be valuable as a collagen stimulator.
However, material properties must be understood carefully. Because hydrophilic materials attract water, temporary swelling may occur more noticeably in the early phase after treatment.
For this reason, Dr.Park emphasizes that understanding the material science of PDO is essential for safe and predictable clinical outcomes.
Biodegradability
PDO has a favorable biodegradability profile. It supports collagen formation during the tissue response phase and gradually breaks down over time.
For the under-eye area, where excessive volume or long-lasting irregular material can become problematic, biodegradability is an important safety consideration.
7. Why RF Cannula Is Important
RF cannula was another key focus of Dr.Park’s lecture.
In Dr.Park’s clinical approach, RF cannula is not merely an additional device. It plays an important role in under-eye tissue refinement and safety planning.
RF cannula may help:
Soften fibrotic or hardened tissue
Improve tissue adhesion caused by previous procedures
Refine irregular under-eye fat and tissue texture
Support tightening in delicate areas
Prepare the tissue environment before collagen stimulation
Assist in managing nodular or firm tissue reactions after previous treatments
This is especially important because complications from collagen biostimulators are not always caused by poor technique alone. Even when an injection is performed by a physician in the correct layer, nodules may still occur due to the intrinsic characteristics of the material, tissue response, spread, or persistence.
Therefore, Dr.Park believes that a clinic offering collagen-stimulating treatments should also have strategies for prevention and management.
At Éclat de Cheongdam Clinic, RF cannula technology is used as both an effect-enhancing tool and a safety-supporting device.
8. Before & After Photo Section
[Before & After Photo 1: Under-Eye Dark Circle Improvement]
This section may show improvement in under-eye shadowing and tired appearance after Ultracol-based collagen stimulation.
Suggested caption:
A clinical case demonstrating gradual improvement in under-eye shadowing, hollowness, and brightness after Ultracol treatment.
[Before & After Photo 2: Under-Eye Hollowing and Skin Quality]
This section may show improvement in both structural hollowing and thin under-eye skin texture.
Suggested caption:
A dual-layer approach can help address both superficial skin quality and deeper structural hollowing.
[Before & After Photo 3: Ultracol + RF Cannula Combination]
This section may show a case where RF cannula was combined with Ultracol to improve tissue irregularity, tightness, and contour smoothness.
Suggested caption:
RF cannula-assisted tissue refinement can support smoother and more natural under-eye rejuvenation.
[Before & After Photo 4: Long-Term Follow-Up]
This section may show gradual improvement over weeks to months.
Suggested caption:
Ultracol is designed for gradual regenerative improvement rather than immediate excessive volume.
Individual results may vary depending on anatomy, skin thickness, previous treatment history, aging pattern, and treatment plan. A personalized consultation with Dr.Park So Yoon is required before treatment.
9. Overall Summary
Dr.Park So Yoon’s Ultracol lecture at Korean Association for Laser, Dermatology and Trichology (KALDAT) highlighted the importance of scientific understanding and precise technique in under-eye rejuvenation.
Ultracol is a PDO-based collagen stimulator that can support gradual improvement in under-eye hollowness, dark circles, fine wrinkles, and skin quality when used with proper layer selection and dosage planning.
Dr.Park’s dual-layer technique using Ultracol 100 and Ultracol 200 is designed to address both superficial skin concerns and deeper structural shadowing.
The addition of RF cannula technology allows more refined tissue preparation, adhesion release, fat and fibrotic tissue softening, and potential management of nodular or hardened reactions.
As one of Korea’s most experienced Ultracol Key Doctors and KOLs, Dr.Park continues to lead academic discussion and clinical refinement in PDO collagen-stimulating treatments.
Located in the heart of Cheongdam-dong, Éclat de Cheongdam Clinic offers a luxury premium medical aesthetic experience for international patients seeking advanced, non-surgical K-beauty procedures in Korea.
Clinic Information
CHEONGDAM ECLAT DE Clinic
Dr.Park So Yoon
Address:
4F, Cheongdam Square A-dong,
420 Dosan-daero, Gangnam-gu, Seoul, Korea
Tel.
+82-2-6120-8888
WhatsApp
+82-10-8899-2903
Instagram
@eclatde.usa
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