Nasolabial fold explained

The nasolabial folds, commonly known as "smile lines"^[1] or "laugh lines",^[2] 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.^[3] 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, ^[4] or even the lip-cheek fold or groove.^[5] It is also known as the nasolabial sulcus.

Cosmetology issues

With ageing the fold may grow in length and depth.^[6] Dermal fillings may be used to replace lost fats and collagen in this facial area.^[7] Facial exercises give effective results in erasing the appearance of nasolabial folds.^[8]

See also

• Epicanthal fold
• Nasalis muscle

Notes and References

1. Book: Burgess. Cheryl M.. Cosmetic Dermatology. 2005. Springer-Verlag Berlin Heidelberg. Berlin, Heidelberg. 9783540273332. 106. 20 February 2015.
2. Book: Vennemeyer M. D.. Michael D. Plastic Surgery Myths Dispelled. 22 December 2010. Xlibris Corporation. 9781456835958. 35. 20 February 2015.
3. Pogrel. MA. Shariati. S. Schmidt. B. Faal. ZH. Regizi. J. The surgical anatomy of the nasolabial fold.. 9798223. 86. Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 1998. 4. 410–5. 10.1016/s1079-2104(98)90365-1.
4. 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
5. https://www.liebertpub.com/doi/10.1001/archfaci.8.5.324 The Lip-Cheek Groove: A New Analysis With Treatment Options
6. Book: Wulc. Allan E.. Sharma. Pooja. Czyz. Craig N.. The Anatomic Basis of Midfacial Aging . Midfacial Rejuvenation. 2010. 10.1007/978-1-4614-1007-2_2. 15–28. 978-1-4614-1006-5.
7. Web site: Why your face ages and what you can do. www.health.harvard.edu/. Harvard Health Publications. 23 February 2015. 14 September 2010.
8. M. Smith. Abigail. Ferris. Taylor. K. Nahar. Vinayak. Sharma. Manoj. March 2020. Non-Traditional and Non-Invasive Approaches in Facial Rejuvenation: A Brief Review. Cosmetics. en. 7. 1. 10. 10.3390/cosmetics7010010. free.