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Evaluation Criteria for Hair Follicles at Dana Plastic Surgery

다나성형외과 모발이식 · 다나성형외과 공식 블로그 · June 11, 2025

Hello This is Dana Plastic Surgery! This time, we will continue looking at the evaluation criteria for hair follicles. What are the evaluation criteria for hair follicles in non-in...

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This page is an English translation of a Korean Naver Blog archive entry. For exact wording and source context, verify against the Korean archive original and the original Naver post.

Clinic: 다나성형외과 모발이식

Original post date: June 11, 2025

Translated at: April 24, 2026 at 1:05 AM

Medical note: This translation does not guarantee medical accuracy or suitability for treatment decisions.

Hello

This is Dana Plastic Surgery!

This time,

we will continue looking at the evaluation criteria for hair follicles.

What are the evaluation criteria for hair follicles in non-incision surgery?

Evaluation Criteria for Hair Follicles at Dana Plastic Surgery image 1

I conducted additional research.

I divided the follicles into four types: normal hair, outer root sheath peeling damage, hair bulb damage, and fracture.

Evaluation Criteria for Hair Follicles at Dana Plastic Surgery image 2

I transplanted the harvested hair follicles into mice.

Then I compared the engraftment rates across the four groups.

Evaluation Criteria for Hair Follicles at Dana Plastic Surgery image 3

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Looking at the graph above,

it shows that minor damage can actually play a decisive role in hair follicle engraftment.

Evaluation Criteria for Hair Follicles at Dana Plastic Surgery image 5

The reason is that

many stem cells are gathered in the bulge stem cells,

and many stem cells are gathered in the dermal papillae.

Evaluation Criteria for Hair Follicles at Dana Plastic Surgery image 6

For hair to grow, interactive signaling between the two stem cell groups occurs,

and that is how it is formed.

Evaluation Criteria for Hair Follicles at Dana Plastic Surgery image 7

Fracture means this pathway is cut off.

Then engraftment is seriously affected.

Evaluation Criteria for Hair Follicles at Dana Plastic Surgery image 8

It is not the amount of fat under the hair bulb that matters,

Evaluation Criteria for Hair Follicles at Dana Plastic Surgery image 9

but rather obtaining clean and intact hair follicles without minor damage

that is the key to non-incision surgery.

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GQI has no clinical significance.

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How does Dana evaluate hair follicles during non-incision surgery?

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Considering factors such as hair follicle resistance, hair follicle damage rate, minor damage, hidden telogen hairs, and the number of hair follicles obtained per punch,

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we do our best to harvest hair follicles in the best possible condition

so that they can be transplanted.

Thank you^^

At [Dana Plastic Surgery YouTube],

there is a wide variety of valuable information related to hair transplant surgery.

If you need information beyond post-hair-transplant pain, please click the link below!!

👇🏻👇🏻

https://www.youtube.com/watch?v=ny6wWvuQb-w

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