Mechanism of action:
The microneedles penetrate through the
epidermis but do not remove it; the epidermis is only punctured and heals
rapidly. The needles seem to separate the cells from each other rather than cut
through them, and thus many cells are spared. When a needle penetrates into the
skin, the injury causes localized damage and minor bleeding by rupturing fine
blood vessels. A completely different picture emerges when thousands of fine
needle pricks are placed close to each other. Most authors consider that skin
needling induces normal wound healing. Recently, a new hypothesis has been
proposed to explain the PCI mechanism of action: when CIT is performed using a
high-quality device, the fine microneedles do not create a wound in the classic
sense. The wound healing process is cut short, as the body is somehow ‘fooled’
into believing that an injury has occurred. According to this new theory,
bioelectricity (also called ‘demarcation current’) triggers a cascade of growth
factors that stimulate the healing phase. Although the mechanism of action is
still unclear, the final result is deposition of new collagen in the upper
dermis.
Depth:
l Home skin needling: 0.2-1mm
l Beauty/clinical: 1-1.5mm
l Medical: 1.5-3mm
Indications:
l Best form of treatment for melasma.
l Pigmentation
l Uneven skin
l Acne, rosacea
l Stretch marks
l Can be done during pregnancy if no anaesthetic is used. Further down
the track of pregnancy, do shallower depth as pregnant ladies bleed more
easily.
l Because it puts a controlled wound through the epidermis into
dermis, there is low risk of PIHP and short down time.
Contraindications:
l Infection
l Pregnancy, lactation (if local anaesthetics is being used)
l Heart conditions
l Blood thinners (fish oil is still ok)
Treatment regime:
6 sessions, every 6 weeks. If concern is
about pigmentation then ongoing.
Procedure:
1.
Double glove.
2.
After face is cleaned, put on
topical anaesthetic + cling wrap and leave on for 45 minutes.
3.
When time is up, wipe off with
face wipe, then clean with chlorhexidine.
4.
Wipe down the dermapen and
screw on the needle.
5.
Put on hyaluronic acid gel (or
PRP platelet rich plasma for even better effect) to hydrate the skin treatment
area.
6.
Treat in cross hatching
technique: 4 directions (horizontal, vertical, diagonal), 50% overlapping.
7.
Forehead: 0.25-0.5mm, depending
on how meaty the forehead is.
8.
Nose: 0.5mm.
9.
Under eyes: 0.25mm (just 1-2
strokes under eye, following orbit to get the crow feet too)
10.
The rest of the face: 1.5mm.
A journalist's personal experience with Dermpen:
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