The punch used in FUE extraction is one of the least discussed but most technically significant details in the procedure. Its size, design, and the skill with which it is used have a direct bearing on transection rate, donor scarring, and the quality of extracted grafts.
The punch is a hollow circular tool that surrounds each follicular unit and cuts through the scalp to allow extraction. Punch diameters in common use range from 0.7 to 1.2 millimetres. The choice of diameter should be matched to the calibre and grouping of the patient’s hair follicles.
A smaller punch (0.7 to 0.8 mm) leaves smaller scars, preserves more of the donor area between extraction sites, and is preferable for patients who prefer to wear their hair very short. The trade-off is that smaller punches require more precision to encircle the follicular unit without transecting it — this is more technically demanding and requires greater experience.
A larger punch (0.9 to 1.0 mm) is easier to use without transection, particularly in curved follicles, but leaves slightly larger scars at each extraction site. The individual scars remain small and are not visible with normal hair length, but for patients who crop their hair very short, the cumulative appearance in the donor area may be slightly more apparent than with smaller punches.
Sharp versus blunt punch design affects the ratio of cutting to coring — blunt tips tend to separate the graft more than they cut, which can reduce transection in curved follicles but requires different technique. The surgeon’s familiarity with the specific punch design they use is as important as the design itself.
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