D-Classy in Daegu: what makes a CaHA filler different?
Many people have not heard of D-Classy, and the ingredient name is even less familiar: CaHA, calcium hydroxylapatite, from the same family as the mineral in bones and teeth. Let me start with the two jobs this material does in the skin.
The short answer
D-Classy is a filler made of tiny CaHA (calcium hydroxylapatite) particles in a gel. The gel and particles fill volume the moment they go in, and then your own collagen builds around the particles over the following months. Having both an immediate effect and a collagen effect is what D-Classy offers. Radiesse, from the same CaHA family, improved 71.2% versus 6.3% at 24 weeks in a 152-person randomised trial with an untreated control, and a biopsy study found more type I collagen at 4 and 7 months. It is not dissolved by hyaluronidase, so at Miso Clinic in Daegu we choose placement and amount conservatively.
How does CaHA work?
| When | What happens | What you notice |
|---|---|---|
| Treatment day | Gel and CaHA particles fill the space | Volume shows at once |
| Weeks | The gel is slowly absorbed; particles stay | Swelling settles and it finds its place |
| Months | Your collagen builds around the particles | Firmness and volume carry on |
So I describe D-Classy as sitting between a filler that fills at once and a collagen booster that builds slowly: visible right away like hyaluronic acid filler, with your own tissue building as well, like a collagen booster.
→ Read more: About D-Classy
Is collagen really produced?
In a study that biopsied CaHA-treated neck and chest skin over 7 months (20 people), type I collagen and elastin increased at 4 and 7 months; type III collagen rose at 4 months and fell at 7. Collagen builds over months, not instantly.
If you have seen a figure such as “160% more collagen”, its source is one patient’s thigh. I do not use that number. I also could not find a randomised trial of D-Classy itself, so I quote studies from the same CaHA family with their conditions.
→ Read more: About Radiesse (CaHA)
Where is it used, and where not?
- Good areas → nasolabial area, jawline, chin: places that need both support and volume
- Areas we avoid → thin, mobile areas such as under the eyes and the lips
- First filling of a deep hollow → dissolvable hyaluronic acid filler first
D-Classy is approved in Korea (MFDS 11-1324) and made by CGBio. Because it cannot be dissolved, we start small and avoid concentrating it in one spot.
→ Read more: Filler versus booster
When I see it differently
- CaHA is not dissolved by hyaluronidase. Because it is hard to reverse, we place it conservatively at first.
- During pregnancy or breastfeeding, or with inflammation at the site, we postpone.
- Tell us about any planned CT or X-ray; CaHA can show on imaging.
→ Read more: Eight things to tell your doctor before treatment
How does the consultation work, and how do I book?
On a first visit we take photos from the front, at 45 degrees and from the side, and together we pick the one concern that bothers you most. I'll ask about any medications you take, any metal or electronic implants in your face, and whether you might be pregnant, and then I split things into what we can do today and what can wait for later. It's completely fine to come in just for a consultation and go home.
| Item | Details |
|---|---|
| Booking | Naver booking · KakaoTalk chat · Phone +82-53-428-2700 |
| Location | 4F Bombom Building, 125 Dongdeok-ro, Jung-gu, Daegu (Exit 1, Kyungpook National University Hospital Station, Line 3) |
| Hours | Weekdays 11:00–19:00 · Saturday 10:00–16:00, closed Sundays and public holidays |
D-Classy in Daegu: FAQ
Does D-Classy show results right away?
Yes. The gel and CaHA particles fill volume as they go in. Collagen builds over the following months.
When does collagen start forming?
In biopsy studies type I collagen had increased at 4 and 7 months. It builds over time, not instantly.
Can D-Classy be dissolved?
No. Hyaluronidase does not dissolve it, so we start small and conservatively.
How is it different from Radiesse?
Both are CaHA. D-Classy is approved in Korea; I could not find a randomised trial of D-Classy itself.
Where can I get a D-Classy consultation in Daegu?
At Miso Clinic in Daegu (4F Bombom Building, 125 Dongdeok-ro, Jung-gu, Exit 1 of Kyungpook National University Hospital Station). You can book through Naver booking, KakaoTalk or by phone at +82-53-428-2700. Weekdays 11:00–19:00, Saturday 10:00–16:00, closed Sundays and public holidays.
Read next
Product pages
Who wrote this
Written and reviewed by Lee Chi-Hak, MD, director of Miso Clinic, Daegu. The treatment standards and injection design set out here are the ones we use in practice.
| Medical director | Lee Chi-Hak, MD |
|---|---|
| Address | 4F Bombom Building, 125 Dongdeok-ro, Jung-gu, Daegu, South Korea · Exit 1, Kyungpook National University Hospital Station |
| Phone | +82-53-428-2700 |
| Hours | Weekdays 11:00–19:00 (lunch 13:00–14:00) / Saturday 10:00–16:00 (no lunch break) / Closed Sundays and public holidays |
| Columns | All clinical columns |
| Reference library | All booster and device references |
References
- Evidence on CaHA — Miso Clinic column caha-evidence: randomised trial with an untreated control, Fabi 2026 (Radiesse, 152 people, 71.2% versus 6.3% at 24 weeks); biopsy study Yutskovskaya YA & Kogan EA. J Drugs Dermatol 2017;16(1):68-74 (20 people, type I collagen and elastin up at 4 and 7 months). D-Classy is approved in Korea (MFDS 11-1324), made by CGBio. I could not find a randomised trial of D-Classy itself.
- What hyaluronidase can dissolve — Miso Clinic column on hyaluronidase: it dissolves hyaluronic acid. There is no dissolving agent for CaHA (Radiesse and similar) or for collagen boosters.
- When results show — Miso Clinic column when-results-show: at day 90, 92% of doctors versus 42% of patients. In biopsies after collagen-stimulating products, no new collagen at 2 weeks, type III at 2 months, type I at 3–4 months.
- Korean medical advertising law — Korean Medical Service Act Article 56(2) (no treatment testimonials, no comparisons with other clinics, no superlatives). This is why this column carries no prices, reviews or before-and-after photos.
- Miso Clinic treatment policy — What we have: Density Noir (ALPHA · BOOST tips), XERF, Oligio Kiss; Lituo (Re2O), CellReDM, Reallo; Rejuran; the full Juvelook lineup; Gouri; Everwrinkle and Everwrinkle V; Radiesse; Byryzn; D-Classy; hyaluronic acid filler; Botox (all areas, skin Botox); ligament injection; dissolving threads. What we do not offer: Onda, Thermage, InMode, Ulthera, Shurink, liposuction. Hollow cheeks get dissolvable hyaluronic acid filler first, sagging gets lifting first; no radiofrequency that day with metal or electronic implants in the face, pregnancy or skin inflammation; threads are the dissolving kind, used conservatively over age 50; we decide by the change that bothers you, not by age; results are judged after 2–3 months with photos taken under the same conditions.
Everything in this column is general information and does not replace medical diagnosis or treatment. Effects and side effects vary with individual skin condition, age and underlying illness, and the same result is not guaranteed for everyone. Any decision to proceed should be made in an in-person consultation with a physician.
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