Tuesday, March 17, 2009

What is Delayed Growth Following a Hair Transplant?

The cyclical nature of asynchronous follicular sharp contrast to the synchronous "dumb" trend in other mammalian species. In the process of moulting, the animals lose their hair in a synchronized, seasonal patterns of adaptation to climate change. The hair loss is by mediators from the hypothalamus, pituitary and pineal gland before.
Men are different from other mammals, in that its cycle is almost croissanceento completamStelle asynchronously, and this MOdell esestablecido shortly after birth. Hair has a growth cycle of approximately three years. Since hair grows approximately 1 / 2 inch per month and reaches a length of about 18 cm in front of the hut. Therefore, the average person, the length of hair is about 1 1 / 2 meters. There are, of course, with significant changes in the normal cycle of hair estvarient for each individual in person. At the end of the curve campana, the pattern of growth can be seen (Angora). At one time, 13% of the hairs ist at rest (telogen) phase, which lasts about three to four months. For example, if the average person has 100,000 hairs on your head should be approximately 90 per day and 90 begins to grow.

Usually after an hour aprèsusine, all in a hair transplant effluvium and in a resting phase. If tuttis hair at the same time and begin a new cycle Anaga normal model CresCITES asynchronously mujeruld people in synchronous culture / way of dumb animals, and viele the new normal hair coming three years later telogen. This doesn''t happen to a significant degree.

Prevent this happening, and to get our hair cycle of "man", there are at least two possible mechanisms lavoro.In First, each hair could restore its growth cycle, to the point where it was interrupted so that the former completely asynchronous model of growth. In the second scenario, all the hair at the beginning of a new cycle of 3 years. In theIn this case, if the hair was to start in the same time more and more, this new cabineIl went to the same time, three years later. In the second scenario, in the order of nature, the normal loroasincrona the outbreak of the growth in some of the follicles. In theory, the Completing asynchronously, the new crop of hair transplantation for a long time, perhaps up to three years.

It is not clear which of the two physiological mechanisms explain curso Veranstaltungskalender, but it is likely that both at work. Firstly, that the new crescitadesidera wealth was in the 3 a.m. to 4 p.m. months with the resumption of the cycle of the follicles. In the second scenario, the hair back slowly over a long period of time with each Zuder follicles beginning a new cycle. Note that in some cases, hair growth is significantly delayed on the usual "three or four months" with a new growth for the next year or mehr after surgery. It is possible that this subgroup of pazientiTS, as the natural mechanism is at work.

We wonder if this phenomenon of slowing of growth is only for new or was ever present and is now recognized. In transplants of 4 mm, mitsind an average of 20 hairs, some atrophy grandescabellote unnoticed. With the use of small grafts such as mini-transplants, especially with micro-grafting and Follikelentwicklung plants, any delay immediately obvious. E "was the experience of the authors that the emergence of large clutches often worsen over time, since the strength of hairs in each graft is visible.

In case of delay in growth is a phenomenon unique in the very small implantationde Innesti, it is possible that the growth cycle of hair transplantation thEstos May to respond differently to the trauma of transplantationtion of a graft. In other words, perssiccation, temperature fluctuations and mechanical trauma to the small beads, which are more of an object really growth retardation in situations where there is not enough damage to completely destroy the follicle. Thus, small degrees dmai trauma and cause of the second physiological mechanism that occur or is likely to lead to growth retardation of the disease. The course, the more trauma, poor growth or  no growth and that would be the "point of no return" must be carefully controlled studies. A different kind of trauma that contribute to growth retardation has recently been recommended by doctors to Cooley and Vogel. They show that when the dermal papilla lost record during the preparation and execution of the transplant, you must neusind the fibrous root sheath of hair, and that the rigenerazionespesso may take several months. To the role of this important Menism of late, that we also be determined clinically.

Our hypothesis is that the "delay" of growth has always been part of the process of transplantation, a normal physiological change in the growth cycle from a ltarder, and their response to the sub-lethal injury to another, much smaller grafts two more obvious changes. What is the percentualeGE is the amount of each and "slow growth" is back on the Wth still at all times Determinanado. But before you panic of "no growth" and before that our patients a number of unrealistic expectations about how much growth can occur DebemJe to work for a better understanding of biological factors that influence our work.

REFERENCES

1. Ebling FJ, Hale PA: Control of moulting mammifères.Mem Soc Endocrinol 18:215, 1970

2. Pecoraro V, et al: Hair-round of a newborn. J Invest Dermatol 43:145, 1964

3. Cooley J, Vogel J. Loss of the dermal papilla during graft dissection and placement: Another cause of X-Factor? In hair transplantation Forumt. 1997, 7:20-21.

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