PRP mechanism and

indications

Dr Gita Faghihi

Assoc.Professor,dermatology department

Isf Uni.Med.Sci.

The most natural

injectable

Definition:

• Platelet-rich plasma (PRP) is blood plasma that has been enriched with platelets.

• As a concentrated source of autologous platelets, (17-19 folds / 3.3million /mm3)

PRP contains ,and releases (through degranulation) several different growth factors and other cytokines that stimulate healing of bone and soft tissue.

BUFFY COAT =PLATELETS + LEUCOCYTES

پالکتها از مترشحه فاکتورهای

PDGF(3 isomeres of platelet-derived growth factor (PDGFaa, PDGFBB, and PDGFaB),

significant role in blood vessel formation,

the cellular division of fibroblasts (the most common cells in connective tissue),

and in synthesizing the extracellular matrix and collagen

Other important growth factors include:

(TGFB1 and TGFB2), vascular endothelial growth factor, and

epithelial growth factor.

PRP

PRP stem cells growth factors• Biosynthesis Collagen Elastin and • Angiogenesis

Main indications of PRP:Sport related injuries:Aschilles tendinitis,,teniss elbow... osteoarthritis,muscle injuriesbone repair regenerationnerve injury

Clinical applications

In humans, PRP has been investigated and used as clinical tool for several types of medical treatments, including: • cardiac muscle injury, • plastic surgery, and maxillofacial

surgery.

anti-aging medicine and beauty sciences.

Indications as a whole

Botulinum toxin limited benefit for lines not due to muscle activity.

dermal fillers are generally used to establish the volume loss in the tear trough, can’t really use

fillers for the fine lines. This is where PRP really useful as it really helps

thinning eyelid

The most favorite area for

PRP is around the eyes.

Peri-orbital rejuvenation is a difficult area

Very important indicationsof PRP

• Periorbital (wrinkles fat pads and dark circles)

• Loose skin

• Saggy skin

biostimulation technique with own patient”s cells

autologous cellular regeneration ( ACR)

Xylocaine-P gel before injection for giving anesthesia

Injection levels are both in dermis and hypodermis,,some what overcorrected

Frequency and intervals of treatments:

For:anti-aging procedures

Most patients will require 2-5 treatments two months apart with results starting to show after 3-4 weeks.

Another protocol (Asian Clinic)Dr Naomi..

2 to 3 sessions of PRP each spaced about 1-2 months apart.reassess the patient about a month after the last treatment (usually at about 3 to 7 months after the first session)

to determine whether the patient has achieved the expected results or whether more sessions are required. the older patients probably need another treatments every 6 months or so ,..

Other indications: stimulating hair regrowth,

skin laxity on the body and

improving the appearance of stretch marks and

scars

Androgenetic alopecia one important indication of

PRPespecially when other treatments and HT surgery

are not accessible.

Hair follicle stem cells are activated and enhanced

growth, and the results are better to be seen after

hair transplantation.

Effective improvement (hair loss)

by PRp lasts about one year

Advantages of PRP therapy

• Autology: your own blood• Tissue regeneration and rejuvenation• Safety: non-allergenic and free from concerns over transmissible diseases such as HIV, Hepatitis B & C, CJD and so on• Faster healing: no fibrosis formation compared to some long term fillers, for example• Easy to use: dermal and hypodermal injections require only one syringe and one needle• Convenience: PRP harvesting can be easily and quickly performed in clinic. A sterile and registered specific kit for the blood puncture, the preparation of the plasma and the materials is used.• Cost effectiveness

SIDE EFFECTS OF PRP FACIAL REJUVENATION

• Pain and faint , headache, for first 12-24 hours are mild• Swelling and redness 1-3 days • bruising (2 weeks,, masked by make-up,,) • In rare cases, skin cellulitis may occur which can be treated

with antibiotics and cold compresses

• Possibility of small venule thrombosis,,• hyperpigmentation

PRP in people over 60 years of age

Although not impossible but they are poor responders.

Exclusion criteriae for PRP • Persons with active skin disease (such as : SLE,

porphyria, )• cancer chemotherapy,• severe metabolic and systemic

disorders(especially advanced diabetes and severe asthma….)

• abnormal platelet function (i.e. blood disorders)• Anti-coagulation therapy • underlying sepsis

Exclusion criteriae for PRP

• NSAIDS drugs during one week before

• History of recent stroke

• (heavy) Cigarette smoking

• Active infection at the inject. site

What to avoidpost—op care

• Avoid massaging or rubbing the treated area for first 48 hours after the treatment.

• Also avoid facial peels , and laser treatments for the first 4 weeks.

HPL(human platelet lysate)

• 2-10 times more growth factors than PRP and long term storation time

• Readily available growth factors faster regeneration

• Do not have platelet membrane ,no risk of allo-immunization

Platelet-Rich Plasma: Evidence to SupportIts UseCLINICAL CONTROVERSIES IN ORAL AND MAXILLOFACIAL SURGERY: PART TWOJ Oral Maxillofac Surg62:489-496, 2004

Robert E. Marx, DDS*University of Miami, FL, USe-mail: rmarx@med.miami.edu

Reference:

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