Survival Rate According to Grafted Density of Korean One-Hair Follicular Units with a Hair Transplant Implanter: Experience with Four Patients

Lee, Weon-Ju; Lee, Seokjong; Na, Gunyoen; Kim, Dowon; Kim, Mungyu; Kim, Jung‐Chul

doi:10.1111/j.1524-4725.2006.32166.x

Cited by 10 publications

(8 citation statements)

References 14 publications

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“…One study of four patients determined that 20 to 30 onehair follicular units per cm 2 showed improved survival compared to grafts containing 40 to 50 equivalent follicular units. 43 The effect of preservation solution on graft viability has also been studied. 44 Prudent harvesting has consequential implications in graft survival, as transection of the follicular unit may lead to poor wound healing.…”

Section: Discussionmentioning

confidence: 99%

Hair Transplantation in Frontal Fibrosing Alopecia and Lichen Planopilaris: A Systematic Review

et al. 2020

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Objective: Evolving hair transplantation (HT) techniques have offered new possibilities for hair restoration. However, the role of HT in patients with frontal fibrosing alopecia (FFA) and lichen planopilaris (LPP) remains unclear. This study aims to evaluate the outcomes and temporal relationship of HT in this population. Methods: A literature search of three databases was conducted. We reviewed 1) literature reporting outcomes of patients with LPP or FFA who received HT, and 2) studies reporting the development of LPP or FFA resulting from HT. Results: Thirteen articles included 42 patients that provided data for evaluation. Fifteen patients had previously been diagnosed with FFA or LPP, and the remaining 27 patients developed disease after undergoing HT. Seven patients with FFA and eight patients with LPP received HT, with a mean sustained disease remission of 2.69 years prior to HT. In total, two of seven (29%) patients with FFA and five of eight (75%) patients with LPP experienced positive HT results over a follow‐up period of 8–72 months. Interestingly, 27 patients without evidence of previous disease developed FFA or LPP following HT after a median duration of 16 months. Conclusions: HT for LPP and FFA is feasible but results may be less favorable compared to HT for other causes. Outcomes may be more favorable for LPP than FFA but this was not statistically significant and evidence is very limited. FFA and LPP can also develop following HT in patients without previous evidence of disease. Level of Evidence: NA Laryngoscope, 131:59–66, 2021

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Section: Discussionmentioning

confidence: 99%

Hair Transplantation in Frontal Fibrosing Alopecia and Lichen Planopilaris: A Systematic Review

et al. 2020

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“…In addition there are several factors to determine fate of transplanted hair, such as the skill of the doctors, the amount of dissected perifollicular connective tissue, the time interval between harvesting and grafting, density of the transplanted hair, and the quality of the donor hair and scalp. 6,7 Donor dominance has been emphasized in autologous hair transplantation, while the influence of the recipient site was rather ignored. However, we previously reported that the hair growth pattern changes after eyebrow transplantation in patients with madarosis due to leprosy.…”

Section: Discussionmentioning

confidence: 99%

Recipient-Site Influence in Hair Transplantation

Hwang¹,

Kim²,

Lee³

et al. 2009

Dermatologic Surgery

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The authors have indicated no significant interest with commercial supporters. D r. Norman Orentreich provided the scientific basis for the field of hair transplantation, stating that the transposed grafted skin maintains its integrity and that characteristics such as texture, color, growth rate, anagen period, and the majority of these transplanted grafts behave independent of the recipient site. 1 The concept of ''donor dominance'' that he discovered formed the foundation of hair restoration surgery. We suggested that the recipient site influences the growth characteristics of transplanted hairs such as growth rate and anagen period when transplanted scalp hairs were transplanted to different recipient sites such as the lower leg, neck, palm, hand dorsum, and eyebrow. 2,3 The purpose of this study was to evaluate whether the body hairs would keep their original growth characteristics when the body hairs were transplanted to the scalp area. Case ReportIn 2005, a patient with male pattern baldness gave his consent for this study. Donor hairs were harvested from the chest area and the occipital scalp using the elliptical excision technique. We transplanted nine chest hairs (single-hair follicular units) to the right side of the frontal scalp ( Figure 1A, yellow circle) and the occipital hairs to the vertex ( Figure 1A, blue circle) using a KNU implanter. We tattooed one point on the right frontoparietal recess where no residual terminal or intermediate hairs were growing and kept a copy of the transplanted points on the cellophane adhesive tape. One year after the operation ( Figure 1B), iris scissors were used to cut nine transplanted chest hairs from the scalp and 14 original chest hairs. The length and caliber of each cut hair was then measured. Hairs were cut as close to the skin surface as possible to measure total hair length grown for 1 year. After the hairs were cut, they were allowed to grow for 4 weeks, and the length of the hairs was again measured. The difference in the hair growth rate per 4 weeks of the transplanted chest hairs and original chest hairs was analyzed.The transplanted chest hairs grew longer than the original chest hairs, 56.3 mm versus 28.5 mm, about two-fold increase in mean length after the 1-year follow-up period ( Figure 2). The hair growth rate also increased slightly after transplantation from the chest to the scalp: 10.4 mm/4 weeks for the transplanted hairs to the scalp and 8.9 mm/4 weeks for the original hairs. Mann-Whitney U test was used to analyze the difference between the transplanted and original chest hairs, so the value of p was less than .05 in the mean length and hair growth rate. The transplanted chest hairs showed several different growth characteristics. However, there was no

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“…The recipient area density suggested for the implanter is 30 grafts/cm 2 . 2,44,45 Because the donor supply is limited in Asians compared with Caucasians, a "density gradient" is advisable. If the patient wants to use a parting, then more density on the frontal area and part side is necessary.…”

Section: Recipient Sitementioning

confidence: 99%

“…• A density of 30 to 40 FUs/cm 2 or less is appropriate for Asians and permits the best hair survival rate. 42,43,44,45 Density Gradient and Layering Effect…”

Section: Optimal Density For Best Survival Ratementioning

confidence: 99%