Key factors in hair transplantation

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Hair Characteristics

The characteristics of a patient’s hair can make a difference both in terms of the achievable result and the type of approach by the surgeon. When we talk about hair characteristics we refer to the color, the caliber or diameter of the hair (fine or thick), whether the hair is curly or straight, and the contrast between the color of the hair and the color of the skin.

All of these aspects play an important role for the surgeon planning the hair transplant surgery and are an important aspect in determining the density that the doctor deems necessary to achieve a natural result that blends seamlessly with the native hair.

The basic factors that help predict what the result will be are the caliber of the hair shaft, the number of hairs per follicular unit, and the general characteristics of the hair. Hair shaft caliber is probably more important than the density of follicular units per cm2. A patient may have an above-average density per cm2 but a miniaturized hair shaft, and considering that the thinning appearance results from light penetrating the hair and reflecting off the scalp, having fine, miniaturized hair is a disadvantageous factor.

The better the characteristics of the hair the easier it is to create a density that allows a natural look and obtain maximum coverage, especially in Norwood 5 or higher cases. Planning for the long term becomes easier since a thick hair gauge allows you to give more extensive coverage while maintaining good density. Ideal hair characteristics include a thick shaft gauge, wavy or curly hair, an elastic scalp, and a low contrast between hair color and scalp skin tone. This explains why hair transplantation works and can give a Norwood 5 or 6 the illusion of coverage and density (donor permitting) without the need to replace all the lost hair one by one.

 

Average number of hairs per follicular unit

What is important is to give a definition of graft since some doctors talk about grafts, some talk about follicular units, and some talk about hair. There can be a large number of responses and consequently a different number of hairs and this number is critical to get the best possible result.

A follicular unit normally consists of 1 to 4 hairs growing in small groups. Usually this is considered a “graft” when it is removed from the scalp.

When people talk about a hair transplant and are asked “how many did you transplant” they normally refer to “grafts” and much more rarely to hairs. The number of hairs per follicular unit is important in determining whether or not a person is a good candidate for a hair transplant. If the average number of hairs per follicular unit is low then one may be in trouble both in dealing with cases of diffuse baldness to the entire scalp but also cases of small thinning as there may not be enough hairs to be placed strategically to give sufficient density for a natural look.

The image below shows 3 different donor areas that have the same density per cm2 of hair but a different number of hairs per cm2.

 

Calculation of miniaturization

The appearance of hair is given by both the thickness of individual stems and the density of hair on the scalp.

Hair grows about 0.6-1.25 cm per month and usually its thickness and density decreases the older you get.

Hair caliber varies from fine to thick and is different from person to person and among different ethnic groups.

Fine hair has a diameter of about 50µm (microns) and because of this characteristic is more susceptible to breakage. Medium hair has a gauge of 60-90µm and this constitutes the norm. Thick hair is stronger with a gauge of 100µm or more.

Miniaturization is an effect of hair loss and androgenetic alopecia in particular.

The hair shaft begins to atrophy and hair caliber begins to shrink in both the recipient and donor areas. If miniaturization occurs in donor this can reduce its capacity and even make the donor area unsuitable for transplantation.

Transplanting miniaturized hair can lead to a poor cosmetic result.

The trauma caused by extraction can cause this hair not to grow back and also have a negative impact on the surrounding hair in the donor area. It is normal to have a certain amount of miniaturized hair in the donor area, especially for older people, but if the miniaturization exceeds 15% of the density of the donor area then hair transplantation is inadvisable (poor donor area).

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Dr. Serkan Aygin
Nato nel 1968, il Dott. Serkan Aygin è stato uno dei chirurghi pionieri del trapianto di capelli in Turchia dalla metà degli anni novanta. Dopo anni di sperimentazione con la tecnica strip, è stato uno dei primi ad utilizzare la più moderna e internazionale tecnica di trapianto FUE. Esperienza e Formazione • Laurea in Medicina presso l’Università di Istanbul • Master in Farmacologia Clinica presso l’Università di Istanbul • Programma di formazione in dermatologia presso l'ospedale Vakıf Gureba • Attività come medico specialista in dermatologia e tricologia presso lo stesso ospedale • Post-specializzazione con inizio della sua attività nel campo della calvizie La clinica del Dr. Serkan Aygin è attiva dal 2013. Presso la struttura vengono effettuati da 15 a 20 interventi al giorno, con megasessioni FUE da più di 4000 unità follicolari e, in alcuni casi, anche il trapianto di peli del corpo (dalla zona del petto). La qualità dei servizi offerti e la soddisfazione del cliente sono una priorità ; La clinica del Dr. Serkan vanta interventi di trapianto di capelli eseguiti su pazienti provenienti da tutto il mondo, in particolare da Europa e Paesi Arabi. Fortemente all’avanguardia e orientato all’ottenimento di grandi risultati a prezzi accessibili, il Dott. Serkan Aygin è sempre alla ricerca di miglioramenti riguardo le tecniche praticate, i dispositivi medici utilizzati e lo sviluppo del procedimento chirurgico. La clinica del Dr.Serkan Aygin collabora attivamente con il forum Bellicapelli a partire dal 2015.

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