White roll on lipsLips of ablack man, with the white roll visible as a lighter-coloured region.
White roll is the white line that borders the top of theupper lip.[1][2] It is anadnexal mass of specializedglands and fat. White roll occurs naturally for nearly everyone, although it can be not white and less visible for dark skinned individuals. Well defined white roll indicates youthfulness and is considered aesthetically pleasing.[3]
With age, white roll often becomes less defined.[4] This is due to sun damage, changes in facial fat, and decreasingcollagen in the area right above the lip.[5] White roll can also be accentuated usinginjectable fillers.[6][7][8]
Sometimes white roll is absent or damaged, due to trauma orcleft lip, in which case it could be reconstructed with plastic surgery.[9][10] However, it is difficult to achieve satisfactory results using surgery, because malalignment of even a millimeter is noticeable and unattractive. It is therefore sometimes tattooed instead.[11]
^Mulliken, John B.; Pensler, Jay M.; Kozakewich, Harry P.W. (September 1993). "The Anatomy of Cupidʼs Bow in Normal and Cleft Lip".Plastic and Reconstructive Surgery.92 (3):395–403.doi:10.1097/00006534-199309000-00001.PMID8341737.S2CID44800426.
^Kirschner, Richard E.; LaRossa, Don (December 2000). "Cleft Lip and Palate".Otolaryngologic Clinics of North America.33 (6):1191–1215.doi:10.1016/s0030-6665(05)70277-2.PMID11449783.
^Jacono, Andrew A. (1 January 2008). "A New Classification of Lip Zones to Customize Injectable Lip Augmentation".Archives of Facial Plastic Surgery.10 (1):25–29.doi:10.1001/archfaci.10.1.25.PMID18209119.
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