Midline deviations between different facial types: laypersons' perception
DOI:
https://doi.org/10.33448/rsd-v9i7.4684Keywords:
Orthodontics; Face; Smiling.Abstract
The objective was to evaluate the effect of the facial type on the perceptions of varying degrees of deviation from the midline by laypeople. The face image of two mesofacial individuals (male and female) was manipulated in the photoshop program in order to produce the other two facial types (brachyfacial and dolichofacial), as well as in each image, midline deviations (1.0 to 4.0 mm). The photographs were taken with a canon xti camera, with a macro lens, obeying the same distance for both participants, with natural head position. The images generated were evaluated by laypeople, who constituted the universe of the sample. The sample corresponded to 150 participants selected for convenience, using the non-probabilistic sampling technique. The evaluators rated the attraction and acceptance of each photograph. The collected data were tabulated in spreadsheets in the Excel program and evaluated in the Statistica for Windows 7.0 program, with a significance level of 5%. It is observed that the facial type is influenced by the degree of perception of the midline deviation and is influenced by sex and age. The facial type that is most influenced is dolichocephalic and the least affected is brachycephalic. The deviation from the midline in the upper arch was noticeable by laypeople, however a deviation of up to 2 mm from the midline in orthodontic treatment would be acceptable.
References
Aldhorae, K., Alqadasi, B., Altawili, Z. M., Assiry, A., Shamalah, A., & Al-Haidari A. S. (2019). Perception of Dental Students and Laypersons to Altered Dentofacial Aesthetics. J Int Soc Prev Community Dent, 10 (1), 85-95.
Alhammadi, M. S., Halboub, E., Al-Mashraqi, A. A., Al-Homoud, M., Wafi, S., Zakari, A., Mashali, & W. (2018). Perception of facial, dental, and smile esthetics by dental students. J Esthet Restor Dent, 30 (5), 415-426.
Colombo, V. L., Moro, A., Rech, R., Verona, J., & Costa, G. C. A da. (2004). Análise facial frontal em repouso e durante o sorriso em fotografias padronizadas. Parte I – Avaliação em repouso. R Dental Press Ortodon Ortop Facial, 9 (3), 47-58.
Johnston, C. D., Burden, D. J., & Stevenson, M. R. (1999). The influence of dental to facial midline discrepancies on dental attractiveness ratings. Eur J Orthod, 21 (5), 517-22.
Ker, A. J., Chan, R., Fields, H. W., Beck, M., & Rosenstiel, S. (2008). Esthetics and Smile Characteristics From the Layperson's Perspective: a computer-based survey study. The Journal Of The American Dental Association, 139 (10), 1318-1327.
Kerns, L. L., Silveira, A. M., Kerns, D. G., & Regennitter, F. J. (1997). Esthetic preference of the frontal and profile views of the same smile. J Esthet Dent, 9 (2), 76-85.
Kim, E., & Gianelly, A. A. (2003). Extraction vsnonextraction: arch widths and smile esthetics. Angle Orthod, 73 (4), 354-8, 2003.
Kokich, V. O., Kiyak, H. Á., & Shapiro, P. A. (1999). Comparing the Perception of Dentists and Lay People to Altered Dental Esthetics. Journal Of Esthetic And Restorative Dentistry, 11 (6), 311-324.
Marson, F. C., Piloto, R. L., Rocha, O. O da., Lolli, L. F., Progiante, O. S., & Silva, C. O. (2014). Percepção da atratividade do sorriso. Revista UNINGÁ Review, 20 (1), 26-29.
McLeod, C., Fields, H. W., Hechter, F., Wiltshire, W., Rody, W., & Christensen, J. (2011). Esthetics and smile characteristics evaluated by laypersons. The Angle Orthodontist, 81 (2), 198-205.
Olsen, J. A., & Inglehart, M. R. (2011). Malocclusions and perceptions of attractiveness, intelligence, and personality, and behavioral intentions. American Journal Of Orthodontics And Dentofacial Orthopedics, 140 (5), 669-679.
Pinho, S., Ciriaco, C., Faber, J., & Lenza, M. A. (2007). Impact of dental asymmetries on the perception of smile esthetics. American Journal Of Orthodontics And Dentofacial Orthopedics, 132 (6), 748-753.
Sarver, D. M. (2001). The importance of incisor positioning in the esthetic smile: the smile arc. Am J OrthodDentofacialOrthop, 120 (2), 98-111.
Schillewaert, N., Langerak, F., & Duhamel, T (1998). Non¬probability sampling for www surveys: a comparison of methods. Journal of Market Research Society, 40(4).
Shyagali, T. R., Chandralekha, B., Bhayya, D. P., Kumar, S., & Balasubramanyam, L. (2008). Are ratings of dentofacial attractiveness influenced by dentofacial midline discrepancies?. Aust Orthod J. 2008 Nov; 24 (2): 91-5.
Springer, N. C., Chang, C., Fields, H. W., Beck, F. M., Firestone, A. R., Rosenstiel, S., & Christensen, J. C. (2011). Smile esthetics from the layperson's perspective. Am J Orthod Dentofacial Orthop, 139 (1), 91-101.
Spyropoulou, G. A., Pavlidis, L., Herrmann, S., Tsimponis, A., Foroglou, P., Delimpaltas, A., Demiri, E., & Cohen, M. (2020). Can Cosmetics' Advertisements Be An Indicator of Different Perceptions of Beauty Amongst Countries?. Aesth Plast Surg.
Thomas, J. L., Hayes, C., & Zawaideh, S. (2003). The effect of axial midline angulation on dental esthetics. Angle Orthod., 73 (4), 359-364.
Tjan, A. H. L., Miller, G. D., & The, J. G. (1984). Some esthetic factors in a smile. The Journal Of Prosthetic Dentistry, 51 (1), 24-28.
Zhang, Y. F., Xiao, L., Li, J., Peng, Y. R., & Zhao, Z. (2010). Young people's esthetic perception of dental midline deviation. Angle Orthod, 80 (3), 515-20.
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