Choosing graft distribution: hairline vs crown priority Donor supply is finite, so grafts spent on the crown are grafts not spent on the hairline. front of head FRONTAL THIRD treated first in most plans MIDSCALP CROWN Dashed rings: crown loss keeps expanding outward for years. Why the frontal third usually goes first Framing: the hairline is what people see when they look at you. More effect per graft: flatter and smaller than the crown. Stable: it still looks sensible as loss progresses behind it. Frontal hair combs back to suggest coverage behind it. Why the crown is riskier to graft early Crown loss keeps expanding outward for years. A crown grafted at thirty-five can end up ringed by a widening bald area by forty-five, and need further grafts to fix. Curved and seen from above, so scalp shows through more. When grafting the crown is reasonable Loss is established and stable, typically in older patients Donor supply is genuinely generous The hairline is already addressed Partial coverage is accepted rather than full restoration Medical treatment has stabilised the surrounding area One donor supply, spent once Frontal third Midscalp Crown The dividers move. Their positions here are not a recommended split. The article states no graft number: ask your surgeon to state your measured donor capacity, how it is allocated, and what is held back.
FUE

如何选择移植单位的分配:发际线优先还是发旋区优先

供区储备是有限的,所以用在发旋区的移植单位,就是没有用在发际线上的移植单位。

摘要

供区储备是有限的,所以用在发旋区的移植单位,就是没有用在发际线上的移植单位。大多数医生优先考虑前额区域,因为它为面部勾勒轮廓,每个移植单位带来的可见改善更多,这样的推理通常是合理的。

为什么前额发际线通常优先于发旋区?

前额发际线通常在好几个方面占优:它为面部勾勒轮廓,也是别人最先注意到的部分;该区域更平、更小,所以用更少的移植单位就能取得更大的效果;即使后方的脱发在继续进展,恢复后的发际线看起来依然合理;而且前额的头发可以向后梳,给人更靠后的区域也有覆盖的印象,反过来则不行。

  • 勾勒轮廓。发际线为面部勾勒轮廓,也是别人看您时看到的部分。
  • 每个移植单位的可见效果。前额区域比发旋区更平、更小,所以用更少的移植单位就能取得更大的效果。
  • 稳定性。即使后方的脱发在继续进展,恢复后的发际线看起来依然合理。
  • 造型。前额的头发可以向后梳,给人更靠后的区域也有覆盖的印象;反过来则不行。
Your donor hair is a finite reserve The area you want to cover draws from a finite donor reserve, the demand must fit inside the supply. Area you want to cover (graft demand) Safe reserve (kept for the future) Total available donor supply (finite) Area to cover (demand) Available donor supply Conceptual, donor hair is limited and never regrows once moved, so a good plan draws on it wisely and keeps some in reserve.

为什么过早在发旋区种植风险更大?

发旋区的脱发会在数年内持续向外扩大,所以 35 岁时种植的发旋区,到 45 岁时周围可能出现一圈越来越宽的秃发区,看起来比不治疗还糟,还需要更多移植单位来修复。发旋区还是一个从上方看过去的弧形表面,头皮更容易透出来,需要更高的密度。

什么时候在发旋区种植是合理的?

在发旋区种植是合理的,条件是:脱发已经确立且稳定,通常见于年龄较大的患者;供区储备确实充裕;发际线已经处理过;患者接受部分覆盖而不是完全覆盖;并且药物治疗已使周围区域稳定下来。

  • 脱发已经确立且稳定,通常见于年龄较大的患者
  • 供区储备确实充裕
  • 发际线已经处理过
  • 患者接受部分覆盖,而不是完全恢复
  • 药物治疗已使周围区域稳定下来

决定是否治疗发旋区时,应当问医生什么?

要请医生用一个数字说出您实测的供区储备,展示他们会如何把它分配到各个区域,并说明为后期保留了多少。拒绝为您的发旋区种植并解释原因的医生,给您的建议要好过那种对您提出的一切要求都一口答应的医生。

我们的发旋区指南介绍了具体内容。

参考文献

  1. Parsley WM, Perez-Meza D. Review of factors affecting the growth and survival of follicular grafts. Journal of Cutaneous and Aesthetic Surgery, 2010;3(2). jcasonline.com

本文总结了已发表的研究和标准临床实践。内容仅为一般性科普信息,不构成医疗建议,也不能替代您自己的手术团队给出的指导。如果他们的建议与本文有任何出入,请以他们的为准。

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