Esthetics and Smile Characteristics Evaluated by Laypersons:  A comparison of Canadian and US data

McLeod, Catherine E.

Esthetics and Smile Characteristics Evaluated by Laypersons: A comparison of Canadian and US data

dc.contributor.author	McLeod, Catherine E.
dc.contributor.examiningcommittee	Wiltshire, William (Preventive Dental Science) Fields, Henry (Orthodontics, The Ohio State University College of Dentistry) Rody, Wellington (Preventive Dental Science)	en
dc.contributor.supervisor	Hechter, Frank (Preventive Dental Science)	en
dc.date.accessioned	2010-06-25T19:27:50Z
dc.date.available	2010-06-25T19:27:50Z
dc.date.issued	2010-06-25T19:27:50Z
dc.degree.discipline	Preventive Dental Science	en_US
dc.degree.level	Master of Science (M.Sc.)	en_US
dc.description.abstract	Objective: To collect data regarding Canadian laypersons perceptions of smile esthetics and compare these data to US data in order to evaluate cultural differences. Methods: Using Adobe® Photoshop® 7, a digital image of a posed smile of a sexually ambiguous lower face was prepared so that hard and soft tissue could be manipulated to alter Buccal Corridor (BC), Gingival display (GD), Occlusal Cant (OC), Maxillary Midline to Face Discrepancy (MMFD) and Lateral Central Gingival Discrepancy (LCGD). Adult Canadian laypersons (n=103) completed an interactive computer-based survey of 29 randomized images to compare smile preferences for these variable. The custom survey was developed to display fluid, continuously appearing modifiable smile variables using MATLAB® R2008 for presentation. These data were compared to previously published data for US laypersons. Statistical inference was determined using Wilcoxon Rank Sum tests. Results: Canadian laypersons were more sensitive in detecting deviations from ideal and had a narrower range of acceptability thresholds for BC, GD, OC, MMFD and LCGD. Ideal esthetic values were significantly different only for BC. Conclusions: It appears cultural differences do exist related to smile characteristics. Clinically significant differences in the preference of the smile characteristics were found between Canadian and US laypersons. Canadian laypersons, on average, were more discriminating to deviations from ideal and had a narrower range of acceptability.	en
dc.description.note	October 2010	en
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dc.format.mimetype	application/pdf
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dc.identifier.uri	http://hdl.handle.net/1993/4009
dc.language.iso	eng	en_US
dc.rights	open access	en_US
dc.subject	smile esthetics	en
dc.subject	acceptability	en
dc.subject	Buccal Corridor	en
dc.subject	Gingival display	en
dc.subject	Occlusal Cant	en
dc.subject	Maxillary Midline to Face Discrepancy	en
dc.subject	Lateral Central Gingival Discrepancy	en
dc.title	Esthetics and Smile Characteristics Evaluated by Laypersons: A comparison of Canadian and US data	en
dc.type	master thesis	en_US