Shekoufeh Mohammadi; Ladan Eslamian; Reza Motamedian
Volume 15, Issue 2 , September 2020, , Pages 1-7
Abstract
Context: The nose and lips area play an important role in facial appearance and nasolabial angle (NLA) can be considered as a determinant factor for attractiveness. The perception of beauty and attractiveness is vastly influenced by media and thus, can change with trends over time. The aim of this study ...
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Context: The nose and lips area play an important role in facial appearance and nasolabial angle (NLA) can be considered as a determinant factor for attractiveness. The perception of beauty and attractiveness is vastly influenced by media and thus, can change with trends over time. The aim of this study was to conduct a systematic review of literature on NLA in faces perceived as attractive over time and in different ethnic groups.
Evidence acquisition: This study was performed following Preferred Reporting Items for Systematic reviews and Meta-Analyses extension for Scoping Reviews (PRISMA-ScR) guideline. We conducted an electronic search using PubMed, Scopus, and Embase databases with the employment of MeSH and free text terms "beauty"[MeSH], "esthetics"[MeSH], "soft tissue", "nasolabial angle", "attractive" and "cephalometric analysis". The inclusion criteria were studies that indicated facial attractiveness by a panel of at least 10 judges, evaluated the soft tissue profile characteristics, and reported the preferred NLA.
Results: The search results revealed 271 related articles, of which 21 studies investigated NLA as a conducive factor in profile attractiveness and were included in the review. The range of preferred NLA was 86° to 107° for men and 84° to 123.12° for women.
Conclusions: The most pleasing lip position and subsequently NLA is influenced by variables including the observer and subject’s gender, and their ethnic background as well as time. Over all, NLA in faces perceived as attractive is more obtuse in women than men. Compared to white norms, NLA is more acute among Chinese and African-Americans, while amongst Iranian women, it is not distinctly far from north American Caucasians. Over the course of time, preferred NLA has significantly changed in women but has been unwavering in men.
Ahmad Sodagar; Elham Sadat Emadian Razavi; Y. Yazdani
Abstract
Background and aims: Nasolabial angle is an important landmark that affects patient’s profile and also appearance of smile. This study has done to assess the relationship between skeletal and dental parameters and nasolabial angle for formulating the individual value of the angle for each patient.
Subjects ...
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Background and aims: Nasolabial angle is an important landmark that affects patient’s profile and also appearance of smile. This study has done to assess the relationship between skeletal and dental parameters and nasolabial angle for formulating the individual value of the angle for each patient.
Subjects and methods: Sixty healthy girls who were referred to orthodontic department of Tehran University of Medical Science were included in the study. Eight skeletal, three dental and three nasal soft tissue parameters (14 parameters) were measured on lateral cephalograms.Results: There were no significant relationships between nasolabial angle and parameters which were analyzed, but derivatives of this angle which named FNA (Posteroinferior angle between Frankfort horizontal plane and columella of the nose) and FLA (Posteroinferior angle between Frankfort horizontal plane and upper lip) showed significant relationship with the parameters. FNA had a positive correlation with U1-Pal, U1-FH, U1-SN, SNA and SNB angles, FLA had positive correlation with SNA, SNB, U1-SN, U1-FH, U1-Pal, and SGn-SN. By means of Multiple Regression analysis for FLA angle, SNB and U1-FH, and for FNA angle, U1-PAL had significant effects. Conclusion: Hard tissue parameters couldn’t affect nasolabial angle, but they had an influence on its derivatives.
