title: Characteristics of robotically harvested hair follicles in Koreans.
abstract: BACKGROUND
  Recently, an automated robotic hair restoration device was developed and is increasingly being used for hair restoration.
  
  
  OBJECTIVE
  We sought to analyze the hair follicles of Korean patients that were harvested by a hair restoration robotic device.
  
  
  METHODS
  Data were reviewed from a total of 22 patients who underwent robotic follicular unit (FU) extraction hair restoration surgery at Seoul National University Bundang Hospital. Hair follicles collected from 3 grids in the central parts of the safe donor zone of each patient were analyzed.
  
  
  RESULTS
  The total number of harvested FUs was 5213, and the total number of collected FUs was 4955. The average yield was 95.1% ± 3.5%. Among the 12,017 harvested hairs, 590 hairs were transected and the average transection rate was 4.91% ± 2.9%. FUs of double hairs made up the majority of harvested FUs (44.1%), followed by triple hairs (31.9%). The transection rate increases in FUs that contain multiple hairs.
  
  
  CONCLUSIONS
  A relatively small sample size and lack of comparative study with conventional FU extraction modalities are limitations.
  
  
  CONCLUSIONS
  The robotic system qualifies for use in hair restoration surgery. It efficiently harvests not only single hairs but multiple hairs as well.
authors.affiliation: Department of Dermatology, Seoul National University Bundang Hospital, Seongnam-si, Republic of Korea.
authors.forename: Jung Won
authors.initials: JW
authors.lastname: Shin
authors.affiliation: Department of Dermatology, Seoul National University Bundang Hospital, Seongnam-si, Republic of Korea.
authors.forename: Soon Hyo
authors.initials: SH
authors.lastname: Kwon
authors.affiliation: Department of Dermatology, Seoul National University Bundang Hospital, Seongnam-si, Republic of Korea.
authors.forename: Sung Ae
authors.initials: SA
authors.lastname: Kim
authors.affiliation: Mojerim Hair Clinic, Seoul, Republic of Korea.
authors.forename: Joo Yong
authors.initials: JY
authors.lastname: Kim
authors.affiliation: Department of Dermatology, Seoul National University Bundang Hospital, Seongnam-si, Republic of Korea.
authors.forename: Jung Im
authors.initials: JI
authors.lastname: Na
authors.affiliation: Department of Dermatology, Seoul National University Bundang Hospital, Seongnam-si, Republic of Korea.
authors.forename: Kyoung Chan
authors.initials: KC
authors.lastname: Park
authors.affiliation: Department of Dermatology, Seoul National University Bundang Hospital, Seongnam-si, Republic of Korea. Electronic address: chhuh@snu.ac.kr.
authors.forename: Chang Hun
authors.initials: CH
authors.lastname: Huh
mesh_terms: D000328:Adult; D000368:Aged; D000505:Alopecia / Q000601:surgery*; D044466:Asian People; D005260:Female; D018859:Hair Follicle / Q000637:transplantation*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D065287:Robotic Surgical Procedures; D020858:Tissue and Organ Harvesting / Q000379:methods*
keywords: androgenetic alopecia; follicular unit extraction; hair restoration surgery; robot; transection rate