{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,9,10]],"date-time":"2025-09-10T21:43:06Z","timestamp":1757540586773,"version":"3.28.0"},"reference-count":19,"publisher":"Georg Thieme Verlag KG","issue":"02","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Facial Plast Surg"],"published-print":{"date-parts":[[2024,4]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Follicular unit excision (FUE) has emerged as the preferred method for hair transplants. Standardized terms and definitions established by members of the International Society of Hair Restoration Surgery and prominent hair restoration surgeons have become the standard, enabling effective knowledge sharing. This chapter provides an overview of the terminology relating to the field.<\/jats:p><jats:p>The historical evolution of FUE and its pivotal role in modern hair transplantation is summarized. Anatomical terminology and graft-related definitions follow, providing insights into the scalp's complex structures and graft characteristics. The subsequent sections detail the terminology associated with graft excision and extraction, shedding light on the precise techniques and procedures employed. An exploration of various FUE techniques and the evolving landscape of FUE devices underscores the continual refinement of hair restoration practices. The chapter proceeds to discuss the \u201csafe'\u201d scalp donor zones, donor assessment terminology, and elements in identifying the optimal donor area for a successful FUE procedure. Additionally, punch dynamics and technique characteristics are examined, emphasizing their pivotal role in achieving superior FUE outcomes. The chapter concludes by discussing the classification of punches and graft evaluation terms, offering insights into the tools, and criteria used to assess graft quality and viability.<\/jats:p>","DOI":"10.1055\/a-2198-1352","type":"journal-article","created":{"date-parts":[[2023,10,25]],"date-time":"2023-10-25T22:43:53Z","timestamp":1698273833000},"page":"146-157","source":"Crossref","is-referenced-by-count":1,"title":["Concepts, Terminology, and Innovations in Follicular Unit Excision Hair Restoration Surgery"],"prefix":"10.1055","volume":"40","author":[{"given":"Aditya K.","family":"Gupta","sequence":"additional","affiliation":[{"name":"Mediprobe Research Inc., London, Ontario, Canada"},{"name":"Department of Medicine, Division of Dermatology, University of Toronto, Toronto, Ontario, Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shruthi","family":"Polla Ravi","sequence":"additional","affiliation":[{"name":"Mediprobe Research Inc., London, Ontario, Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"194","published-online":{"date-parts":[[2023,12,4]]},"reference":[{"issue":"04","key":"ref1","doi-asserted-by":"crossref","first-page":"803","DOI":"10.1016\/j.jaad.2021.03.124","article-title":"Hair transplantation: basic overview","volume":"85","author":"F Jimenez","year":"2021","journal-title":"J Am Acad Dermatol"},{"issue":"02","key":"ref2","doi-asserted-by":"crossref","first-page":"169","DOI":"10.1016\/j.fsc.2020.01.006","article-title":"Follicular unit excision: current practice and future developments","volume":"28","author":"G K Epstein","year":"2020","journal-title":"Facial Plast Surg Clin North Am"},{"volume-title":"Follicular unit excision terminology and overview","year":"2023","author":"R Unger","key":"ref7"},{"volume-title":"FUE terminology: characterizing donor area, grafts, techniques, and devices","year":"2022","author":"S M Lam","key":"ref8"},{"issue":"02","key":"ref10","doi-asserted-by":"crossref","first-page":"315","DOI":"10.25259\/IJDVL_1071_20","article-title":"History of follicular unit excision","volume":"87","author":"S Bansod","year":"2021","journal-title":"Indian J Dermatol Venereol Leprol"},{"issue":"06","key":"ref11","doi-asserted-by":"crossref","first-page":"211","DOI":"10.33589\/14.6.0211","article-title":"Sharing experiences of follicular isolation technique\u2014follicular unit extraction","volume":"14","author":"S Kingsley","year":"2004","journal-title":"Hair Transplant Forum Int"},{"key":"ref13","first-page":"339","volume-title":"Follicular unit excision terminology and overview","author":"A K Gupta","year":"2023"},{"key":"ref14","first-page":"33","volume-title":"FUE terminology: characterizing donor area, grafts, techniques, and devices","author":"P Mohebi","year":"2022"},{"volume-title":"Motorized FUE with hybrid punch","year":"2022","author":"J Devroye","key":"ref15"},{"key":"ref16","doi-asserted-by":"crossref","first-page":"1657","DOI":"10.2147\/CCID.S333353","article-title":"A novel follicular unit excision device for all-purpose hair graft harvesting","volume":"14","author":"S Umar","year":"2021","journal-title":"Clin Cosmet Investig Dermatol"},{"issue":"05","key":"ref17","doi-asserted-by":"crossref","first-page":"188","DOI":"10.33589\/28.5.0188","article-title":"The Trivellini system and technique","volume":"28","author":"R Trivellini","year":"2018","journal-title":"Hair Transplant Forum International"},{"issue":"03","key":"ref18","doi-asserted-by":"crossref","first-page":"167","DOI":"10.4103\/idoj.IDOJ_283_16","article-title":"Body to scalp: evolving trends in body hair transplantation","volume":"8","author":"K Saxena","year":"2017","journal-title":"Indian Dermatol Online J"},{"issue":"12","key":"ref19","doi-asserted-by":"crossref","first-page":"1705","DOI":"10.1097\/DSS.0000000000002490","article-title":"Follicular unit excision punches and devices","volume":"46","author":"A K Gupta","year":"2020","journal-title":"Dermatol Surg"},{"issue":"01","key":"ref20","doi-asserted-by":"crossref","first-page":"14","DOI":"10.33589\/27.1.0014","article-title":"Dealing with a hybrid trumpet punch","volume":"27","author":"A Tykocinski","year":"2017","journal-title":"Hair Transplant Forum Int"},{"issue":"04","key":"ref22","doi-asserted-by":"crossref","first-page":"195","DOI":"10.4103\/JCAS.JCAS_123_18","article-title":"Donor harvesting: follicular unit excision","volume":"11","author":"A K Garg","year":"2018","journal-title":"J Cutan Aesthet Surg"},{"issue":"01","key":"ref23","doi-asserted-by":"crossref","first-page":"31","DOI":"10.4103\/JCAS.JCAS_142_18","article-title":"Assessment of safe donor zone of scalp and beard for follicular unit extraction in Indian men: a study of 580 cases","volume":"12","author":"K Chouhan","year":"2019","journal-title":"J Cutan Aesthet Surg"},{"issue":"04","key":"ref24","doi-asserted-by":"crossref","first-page":"173","DOI":"10.4103\/JCAS.JCAS_118_18","article-title":"Controversies in hair transplantation","volume":"11","author":"M Kumaresan","year":"2018","journal-title":"J Cutan Aesthet Surg"},{"issue":"08","key":"ref25","doi-asserted-by":"crossref","first-page":"1883","DOI":"10.1111\/jocd.13506","article-title":"Innovations hair restoration surgeons have made to adapt to the challenges of follicular unit excision","volume":"19","author":"A K Gupta","year":"2020","journal-title":"J Cosmet Dermatol"},{"issue":"08","key":"ref26","doi-asserted-by":"crossref","first-page":"2602","DOI":"10.1111\/jocd.14225","article-title":"Hair transplantation Follicular Unit Excision (FUE): Introducing the multipurpose octagonal ring punch","volume":"20","author":"R Trivellini","year":"2021","journal-title":"J Cosmet Dermatol"}],"container-title":["Facial Plastic 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