GNX- You either work for Dr. Woods or you have very little understanding of the "Limitations of hair transplants".
The limitation to hair transplants is that there is a fixed amount of good genetic hair you can take from the back and sides of the scalp to transfer to the balding regions.
Therefore as hair transplant surgeons we should do everything in our power to "ensure the highest percent of grafts survive and grow". The last thing you want a hair transplant surgeon to do is destroy this very limited "hair bank".
When it comes to removing hair from the donor area (i.e.- hair bank), using any device {scalpel, multi-blade knife, punch excision or by Dr. Wood's punch technique} we remove this tissue blindly (i.e.- we cannot see what we have done until after we have removed the tissue). This is a huge problem since the only time we know if we transected and destroyed these hair follicles is after the damage is done (after we have removed this donor tissue). Therefore it is best to have as little surface area as possible exposed to any device removing tissue blindly. Once we have this tissue out, then we can dissect it into smaller grafts (follicular units) with full visualization of a stereoscopic microscope (which immensely decreases the transection of these very precious and limited good genetic hair follicles).
Now let's review Dr. Wood's technique to remove the donor tissue. It's a modified version of the old, antiquated technique used in the 1960-1970's. Instead of punching out 4-5 mm plugs and letting this tissue granulate in (i.e.- heal on its own), his technique punches out 1mm plugs (or whatever fancy term he wants to give this cookie-cutting device he uses to remove the donor tissue) and lets it granulate in. This technique immensely increases the surface area of tissue being exposed to a blind excision technique. This technique permanently remove this good genetic hair from the "hair bank" and replaces it with a scar (albeit a very small scar that many times is hard to see), which ultimately decreases the density of the "hair bank".
My problem with this technique is the immensely increased amount of surface area of tissue being exposed to a device that is removing the tissue blindly. This immensely increases the risk of transection (and destruction) of the hair follicles, which is the last thing we should be doing to the fixed and very limited "hair bank".
As far as scarring is concern"???any time you remove tissue from the body you will get a scar, however some scars are much more unnoticeable than others are. Unfortunately, some people (taking away poor surgical technique) can form much scar tissue (i.e.-keloids or hypertrophic scars). I have seen some patient's that have developed horrendous keloids from just having their ears pierced with a needle. This is much less traumatic then having a 1mm punch removed from the scalp. So when you stated that a patient is not at risk of bad scarring following the "Wood's technique" is completely false. Both strip excision and the Wood's technique can lead to bad scarring, however with proper surgical technique this risk can be minimized (but again not removed).
Sincerely,
Paul J. McAndrews, M.D.
Diplomate, American Board of Dermatology