FOR PERMANENT HAIR REMOVAL -...
Transcript of FOR PERMANENT HAIR REMOVAL -...
FOR PERMANENT HAIR REMOVAL
Hair Removal (by Wikipedia)
Hair removal, also known as epilation or depilation, is the removal
of body hair, and describes the methods used to achieve that result.
Hair typically grows all over the human body during and after puberty.
Men tend to have more body hair than women. Both men and women
have hair on the head, eyebrows, eyelashes, armpits, pubic region
and legs; and men also have hair on their face, abdomen, back and
chest. Hair does not generally grow on the palms of the hands, the
lips, certain areas of the genital structure, or the soles of the feet.
Forms of hair removal are practised for a number of reasons,
including cultural, sexual, medical and religious. Forms of hair removal
have been practised in almost all human cultures. The methods used
to remove hair have varied in different times and regions, but shaving
is the most common method.
Permanent hair removal For over 130 years, electrology has been in use in the United States.
It is approved by the FDA. This technique permanently destroys germ
cells responsible for hair growth by way of insertion of a fine probe in
the hair follicle and the application of a current adjusted to each hair
type and treatment area. Electrology is recognized by the FDA as the
only permanent hair removal method. Laser hair removal technology
became widespread in the US and many other countries from the
1990s onwards. It has been approved in the United States by the
FDA since 1997. With this technology, light is directed at the hair and
is absorbed by dark pigment, resulting in the destruction of the hair
follicle. The hair removal becomes permanent after one or more sessions.
The number of sessions needed depends upon the amount and type of
hair being removed. Equipment for performing laser hair removal at home
has become available in recent years.
Permanent hair reduction
Photoepilation * Laser hair removal (lasers and laser diodes)
* Intense pulsed light (high-energy lamps)
* Diode epilation (high energy LEDs but not laser diodes)
Destroying and denaturalization
of hair follicle
Photo energy → Thermal energy
Selective melanin absorption by 808nm
penetrating into hair follicle
Basic Theory of Diode Epilation
Laser
Energy
Absorption of laser light occurs selectively in
the melanin in the hair shaft
Photo energy is transmuted into Thermal energy
The hair follicle reaches a temperature sufficient
to cause irreversible thermal damage while the
Epidermis has remained below the damage threshold
Items Merits Demerits Remarks
IPL
Low cost Pain (high) Burn (high risk) Less effectiveness
1)Energy concentration on melanin is very poor because of its multiple wavelength 2)An adjacent tissue are damaged unnecessarily
Nd-YAG 1) Deep penetration up to 4mm 2) Less risk of burn
Less effectiveness 1)Energy concentration on melanin is very poor since it is affected by water absorption
Alexandrite
Possible to remove hair permanently
1)High cost for low charged patients 2)High running cost 3)Pre-heating required at least 10 min.
No profitable
Diode
1)Permanent hair removal 2)Fast depilation 3)Less pain 4)No consumable, no running cost
Simple to use Reasonable cost
Why hair removal by Diode laser ?
Important Factors to be considered on hair removal lasers
Permanent hair
removal
Wavelength(nm)
Absorption rate of
melanin
Pulse Duration(ms)
Thickness of hair
Fluence (J/㎠)
Efficacy of hair removal
Cooling Temp.(℃)
Safety of operation
For the best result of hair removal, laser energy should be delivered an absorbed
selectively on melanin with the higher thermal energy in the shorter time.
Comparison between laser versus light (IPL).
Wavelength(nm)
Laser Light
Wavelength Singular Plural
Melanin
Absorption
Selectively absorbed in melanin
through hair shaft up to follicle Destroy melanin and adjacent cells
Clinical effect
after treatment Minor erythema around hair treated. Burning on hair without erythema
Energy
concentration High Poor
Merits and
demerits
• Permanent hair removal.
• Less energy required due to its
high selective-absorption
• No risk of burn (on well shaved)
• Temporal hair removal
• High energy required as its complex
wavelength
• High risk of burn
Melanin Absorption Rate of lasers
1064
Nd:YAG
810
Diode
755
Alexandrite
694
Ruby
Intense Pulsed Light
Wavelength(nm)
What is TRT(Thermal Relaxation Time) ?
When laser beam is emitted into skin, thermal energy is transmitted in certain time and the
skin recovered from this thermal heat. This recovering time is TRT. In general, during TRT, the
thermal energy is reduced gradually, which mean it might not be good in clinical aspect.
Therefore, an ideal laser treatment should be done in TRT period or, before TRT.
Thickness of hair and TRT are proportionate. It requires to treat in various pulse
duration depend on thickness of hair !
Recommendation of treatment cases.
Thin hair : Power↑, PD↓(Short TRT) ⇒ Necessary High Power
Thick hair : Power↓, PD↑ (Long TRT) ⇒ Necessary Long Pulse Duration
Pulse Duration (ms)
For better efficacy, it requires high fluence relatively with a proper pulse duration time.
Some of diode lasers produce high fluence but, more than 30% of those energy are
scattered and, not delivered onto skin efficiently.
Fluence(J/㎠)
Laser
Diode
Sapphire
Tip
Laser
Diode
Focusing
Lens Array
Sapphire
Tip
Non-Collimation Method Collimation Method
Cooling System
Cooling part is one of the most essential components in diode laser system.
It enables to reduce pain during laser treatment as well as to maximize entire system’s
performance appropriately.
1. Patient’s pain relief
During treatment patients may feel prick or tingle. This is normal process of procedure by changing to
thermal energy from photo energy. Our cooling system relieves this painful feelings.
2. Minimize risk of side effects
With this cooling system, it is available to radiate with high fluence for better efficacy and patient
does not feel strong pain. Some of systems radiates high fluence with long pulse duration but , on the
other hand it exposures on high risks of burn or other side effects.
3. Maximize efficacy of hair removal
As result, the diode hair removal laser system is strongly required to have a good cooling performance
so that patients feel less pain, and thus it is available to emit properly high energy into hair shaft without
any risk of side effects.
Ideal hair removal system, EPICARE PLUS
• High power collimation
lens, Laser Diode
• Safe operation by
temp-sensor
• Fast depilation up to
10 Hz
• Powerful cooling
by Dual Chiller system
(up to -5 ℃ )
Repitition
; 1 Hz ~ 10Hz
Convenient Display
; wide 10.4” LCD Touch Screen
Energy Fluence
; 1~100J/㎠
Pulse Duration
; 10~350ms
Save Mode
; up to 5 frequent parameters
User friendly interface, EPICARE PLUS
Epicare Plus Specification
EPICARE PLUS SYSTEM
Light Source Diode (808nm) Cooling Type Contact Cooling
Optical Guide Sapphire Crystal Cooling Control STCTM (Up to 5℃)
Optical Energy Up to 100 J/㎠ Spot Size 12 x12 mm
Pulse Width 5.0~350ms adjustable
Dimension 400 x 420 x 800 mm
Pulse Mode Short and Long Weight 40Kg
Repetition Up to 10 Hz Electrical
Replacement
Free Voltage (110/220V), 50~60Hz