title: Experimental Evidence in Hair Restoration Procedures: Plucked Hair Survival and Growth Rate.
abstract: BACKGROUND
  Limitations of hair restoration procedures are the amount of hairs available and the invasiveness of follicular harvesting.
  
  
  OBJECTIVE
  The aim of this study was to compare conventional human micrografts and plucked hair follicles in an in vitro model in order to test hair growth rates for experimentally assessing the soundness of plucked follicle use in hair transplantation procedures.
  
  
  METHODS
  A total of 100 conventional one-hair micrografts (group A; control) and a total of 80 plucked hair follicles (group B; experimental) were obtained from 14 healthy male patients. The length of each graft was measured immediately following isolation and at the end of the 10-day culture period. The Kruskal-Wallis one-way analysis of variance by ranks test was used in order to statistically analyze the data obtained.
  
  
  RESULTS
  A statistically significant difference was found between the growth rate of micrografts in control (mean 10-day shaft growth rate = 0.30mm) and experimental (mean 10-day shaft growth rate = 0.36mm) groups.
  
  
  CONCLUSIONS
  The obtained data shows a higher plucked hair follicle growth rate compared to one-hair micrografts, which leads us to believe that plucked micrografts could be a useful and less invasive adjunct in the field of hair transplantation surgery.
authors.affiliation: Department of Surgical Sciences, Plastic Surgery Unit, University of Parma, and Cutaneous, Mini-invasive, Regenerative and Plastic Surgery Unit, Parma University Hospital, Parma, Italy.
authors.forename: Edoardo
authors.initials: E
authors.lastname: Raposio
authors.affiliation: Department of Surgical Sciences, Plastic Surgery Unit, University of Parma, and Cutaneous, Mini-invasive, Regenerative and Plastic Surgery Unit, Parma University Hospital, Parma, Italy.
authors.forename: Giorgia
authors.initials: G
authors.lastname: Caruana