Trivellini Roberto, Gupta Aditya K
Trivellini Hair Restoration, Asunciόn, Paraguay.
Division of Dermatology, Department of Medicine, University of Toronto School of Medicine, Toronto, ON, Canada.
J Cosmet Dermatol. 2020 Sep;19(9):2194-2200. doi: 10.1111/jocd.13532. Epub 2020 Jun 22.
The follicular unit excision (FUE) technique has become the preferred method for hair transplants over the traditional strip harvest technique due to low scar visibility and shorter recovery time for the patient. However, a limitation of the FUE technique is the potential for graft trauma due to the small diameter, sharp punches used to harvest individual follicular units.
Here, we introduce the novel edge out FUE punch that is designed with a thicker wall and has an internal bevel. We describe how the dynamics of this punch reduces the risk of follicle transection.
A review of the available literature and information on the edge out punch in comparison with other punch shapes, as well as the authors' experience in this area, is provided.
The edge out punch is designed with thick walls and an internal bevel, placing the sharp cutting edge on the outer diameter. The dynamics of this punch aid in directing the graft into the center of the punch lumen and keeps the sharp cutting edge away from the hair follicles deeper in the dermis, reducing the risk of follicle transection.
The dynamics of the forces generated by the edge out punch aid in minimizing follicular transections during graft harvesting. By understanding the dynamics behind this novel punch, hair restoration surgeons (HRSs) can optimize their surgical technique to obtain consistently high-quality grafts during FUE.
由于疤痕可见度低且患者恢复时间短，毛囊单位提取（FUE）技术已成为比传统条带切取技术更受欢迎的毛发移植方法。然而，FUE技术的一个局限性是，用于提取单个毛囊单位的小直径锋利打孔器可能会造成移植物损伤。
在此，我们介绍一种新型的边缘外FUE打孔器，其设计有更厚的壁且有内部斜面。我们描述了这种打孔器的动力学原理如何降低毛囊横断的风险。
提供了对现有文献的综述以及与其他打孔器形状相比关于边缘外打孔器的信息，以及作者在该领域的经验。
边缘外打孔器设计有厚壁和内部斜面，将锋利的切割边缘置于外径上。这种打孔器的动力学原理有助于将移植物引导到打孔器管腔的中心，并使锋利的切割边缘远离真皮层中更深的毛囊，从而降低毛囊横断的风险。
边缘外打孔器产生的力的动力学原理有助于在移植物获取过程中使毛囊横断最小化。通过了解这种新型打孔器背后的动力学原理，毛发修复外科医生（HRSs）可以优化他们的手术技术，以便在FUE过程中持续获得高质量的移植物。
