Microneedling - scars

Scars are the visible end state of a skin healing process.
Any disruption of tissue integrity ends up in a scar, at least when the disruption is deeper than 0.5 mm. Most common are acne scars in the face of patients. But scars also occur after surgery e.g. after breast or blepharo-eye surgery so as C-section.
As wounds heal, scar tissue forms. First it is often red and prominent. Over several months, a scar usually becomes flat and pale. If there is a lot of tension on that healing wound, the healing area is getting thicker than usual. This is known as a hypertrophic scar tissue or eventually keloid.

Mechanism of action in micro-needling

It is a very complex process, but the principle is quite easy to understand.
The microneedling is a medical instrument that is applied on the skin with the aim of stimulation of new collagen. It is also known as CIT (Collagen-Induction-Therapy) oder Perkutane Collagen Induktion (PCI)  The final effect is skin revitalization/ rejuvenation without damage. It helps the body self-healing mechanisms.
Because of these tiny “wounds,” the body produces elastin and collagen to heal them. Through this healing process, the dermis becomes thicker and lines and wrinkles become less noticeable. Microneedling simply utilize the body self-healing mechanisms.

There are various skin needling devices on the market. One medical device is the Dermaroller® (Dermaroller GmbH), the Dermapen™ (Equipmed Pty Ltd; Australia) or the Derma-Stamps™ (Dermaroller USA). The fine micro-needles have various diameter and length.

Professional microneedling is considered to be one of the safest skin treatment procedures.
It is well tolerated and takes a few minutes up to an hour to complete. All depends on the area to be treated and the severity of the problem.

A local numbing cream will be applied on the treatment area.
The skin is punctured in a specific pattern using a skin-needling device. The device is multiple times rolled in a specific pattern over the skin for best results.
These very fine needles puncture the skin. They create channels or micro-wounds stimulating the skin cell regeneration.
Depending on the condition treated, it may take 5-60 minutes to complete the procedure.
A minimum of six weeks is recommended between two treatments as it takes that long for new natural collagen to form.

Treatment interval
After the microneedling, the body needs time to produce, organize and transform into new collagen and new blood vessels. This process takes some months.
1 or 2 follow-up procedures, with minimum separation of 8– 12 weeks, or more, depends on scar type.
It is most important to know that the first treatment brings a significant change (and visible improvement) in the range of 30 to 40%. Follow-up treatment may bring another 10 to 20% improvement.
If you would like to learn more about the Cosmetic Treatment at our Zurich clinic to enhance your skin health and appearance, request a consultation with Dr. Liv Kraemer or call us (044) 211 88 11 during our phone-hous to schedule your appointment.


Min Zhao, Electrical fields in wound healing—An overriding signal that directs cell migration,  Department of Dermatology, 2008, Seminars in Cell & Developmental Biology 20  (2009) 674–682
Schwarz, A Prospective Controlled Assessment of Microneedling with the Dermaroller  Device, Plastic and reconstructive Surgery, June 2011
Aust et al., Medical needling: improving the appearance of hyperthrophic burn-scars,  GMS Verbrennungsmedizin 2009, Vol. 3, ISSN 1869-1412
Lilli Fan, Don Owen, DNA Microarray Analysis of Microneedle Effects on MatTek FT  Skin Equivalent, 2010 Baton Rouge
Gary W. Cleary, Microneedles for Drug Delivery, 17 November 2010, © Springer Science  + Business Media
Kalluri et al. Characterization of Microchannels Created by Metal Microneedles: Formation  and Closure, The AAPS Journal (# 2011) DOI: 10.1208/s12248-011-9288-3
Safonov, Percutaneous Collagen Induction in correction of post-burn, scars. Translation article  FACE 1/2011