Nasolabial fold
{{Short description|Two skin folds in the face}}
{{Infobox anatomy
|name=Nasolabial fold
|image=File:Nasolabial fold.jpg
|caption=Human face, with left nasolabial fold marked in black ellipse
}}
The nasolabial folds, commonly known as "smile lines"{{cite book|editor-last1=Burgess|editor-first1=Cheryl M.|title=Cosmetic Dermatology|date=2005|publisher=Springer-Verlag Berlin Heidelberg|location=Berlin, Heidelberg|isbn=9783540273332|page=106|url=https://books.google.com/books?id=kJNOY2sLxIoC&pg=PA106|accessdate=20 February 2015}} or "laugh lines",{{cite book|last1=Vennemeyer M. D.|first1=Michael D|title=Plastic Surgery Myths Dispelled|date=22 December 2010|publisher=Xlibris Corporation|isbn=9781456835958|page=35|url=https://books.google.com/books?id=V-9e6vSj6ZkC&pg=PA35|accessdate=20 February 2015}}{{Self-published inline|certain=yes|date=January 2018}} are facial features. They are the two skin folds that run from each side of the nose to the corners of the mouth. They are defined by facial structures that support the buccal fat pad.{{cite journal|last1=Pogrel|first1=MA|last2=Shariati|first2=S|last3=Schmidt|first3=B|last4=Faal|first4=ZH|last5=Regizi|first5=J|title=The surgical anatomy of the nasolabial fold.|pmid=9798223|volume=86|journal=Oral Surg Oral Med Oral Pathol Oral Radiol Endod|year=1998|issue=4|pages=410–5|doi=10.1016/s1079-2104(98)90365-1}} They separate the cheeks from the upper lip. The term derives from Latin nasus for "nose" and labium for "lip". Other people suggest the term melolabial fold,{{clarify|date=July 2024|reason=see the talk page}} [https://www.mdpi.com/2075-4418/14/7/716 Why Do Nasolabial Folds Appear? Exploring the Anatomical Perspectives and the Role of Thread-Based Interventions], {{doi|10.3390/diagnostics14070716|doi-access=free}} or the lip-cheek fold or groove.[https://www.liebertpub.com/doi/10.1001/archfaci.8.5.324 The Lip-Cheek Groove: A New Analysis With Treatment Options], {{doi|10.1001/archfaci.8.5.324}} It is also known as the nasolabial sulcus.
Cosmetology
With ageing the fold may grow in length and depth.{{cite book|last1=Wulc|first1=Allan E.|last2=Sharma|first2=Pooja|last3=Czyz|first3=Craig N.|chapter=The Anatomic Basis of Midfacial Aging |title=Midfacial Rejuvenation|date=2010|doi=10.1007/978-1-4614-1007-2_2|pages=15–28|isbn=978-1-4614-1006-5}} Dermal fillings may be used to replace lost fats and collagen in this facial area.{{cite web|title = Why your face ages and what you can do|url = http://www.health.harvard.edu/healthbeat/why-your-face-ages-and-what-you-can-do|website = www.health.harvard.edu/|publisher = Harvard Health Publications|accessdate = 23 February 2015|date = 14 September 2010}} Facial exercises give effective results in erasing the appearance of nasolabial folds.{{Cite journal|last1=M. Smith|first1=Abigail|last2=Ferris|first2=Taylor|last3=K. Nahar|first3=Vinayak|last4=Sharma|first4=Manoj|date=March 2020|title=Non-Traditional and Non-Invasive Approaches in Facial Rejuvenation: A Brief Review|journal=Cosmetics|language=en|volume=7|issue=1|pages=10|doi=10.3390/cosmetics7010010|doi-access=free}}
See also
References
{{Reflist}}
{{Superficial anatomy}}
{{Authority control}}