Perceptions of Dentists and Non-Professionals on Some Dental Factors Affecting Smile Aesthetics: A Study from Vietnam

Vo Truong Nhu Ngoc, Dang-Khoa Tran, Truong Manh Dung, Nguyen Viet Anh, Vu Thi Nga, Le Quynh Anh, Nguyen Thi Thuy Hanh, Nguyen Phuong Linh, Hoang Ngoc Quynh and Dinh Toi Chu
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Vo Truong Nhu Ngoc: School of Odonto Stomatology, Hanoi Medical University, Hanoi 100000, Vietnam
Dang-Khoa Tran: Department of Anatomy, University of Medicine Pham Ngoc Thach, Ho Chi Minh City 700000, Vietnam
Truong Manh Dung: School of Odonto Stomatology, Hanoi Medical University, Hanoi 100000, Vietnam
Nguyen Viet Anh: School of Odonto Stomatology, Hanoi Medical University, Hanoi 100000, Vietnam
Vu Thi Nga: Institute for Research and Development, Duy Tan University, Danang 550000, Vietnam
Le Quynh Anh: School of Odonto Stomatology, Hanoi Medical University, Hanoi 100000, Vietnam
Nguyen Thi Thuy Hanh: Institute for Preventive medicine and Public Health, Hanoi Medical University, Hanoi 100000, Vietnam
Nguyen Phuong Linh: Ban Mai School, Ha Dong, Hanoi 100000, Vietnam
Hoang Ngoc Quynh: Nottingham Trent University, 50 Shakespeare St, Nottingham NG1 4FQ, UK
Dinh Toi Chu: Faculty of Biology, Hanoi National University of Education, Hanoi 100000, Vietnam

IJERPH, 2020, vol. 17, issue 5, 1-10

Abstract: Aim : It is important to meet the aesthetic expectation regarding the smile concept of both dentists and non-professionals after treatment is complete. Therefore, the study aims to evaluate the effects of altered displays in incisors, gingival margin, and other smile-related-factors on dentists’ vs. non-professionals’ aesthetics perceptions. Materials and method : We altered the features of 42 digital smile photographs to generate the changed displays in incisors, gingival margin, and other smile-related-factors. Then, these altered photographs were presented to 51 dentists and 51 non-professionals, and each picture was rated by each participant with a visual analog scale ranging from 0 (very ugly) to 100 (very beautiful). Results : We found that the alterations in incisors, gingival margin, and other factors affected studied groups’ aesthetic perception of smile. The ugly smile threshold rated by both groups for crown length of maxillary central incisors was 2.0 mm. This threshold was 2.5 mm for dentists, with moving the gingival margin of maxillary lateral incisors to the incisal ridge. The ugly thresholds for other smile-related-factors were different between studied groups; for example, the ugly thresholds for gingival exposure levels were 3 and 4mm for dentists and non-professionals, respectively. Thus, our data indicate that altered displays in incisors, gingival margin, and other smile-related-factors affected perceptions of both studied groups on smile aesthetics, but dentists tended to feel more refined than non-professionals. Dentists and non-professionals had significantly different aesthetic perceptions of the alteration of the gingival exposure level. Conclusion : Both dentists and non-professionals’ perceptions should be fully considered during orthodontic and prosthodontic treatment to achieve optimum aesthetic results.

Keywords: smile aesthetics; perception; dentists and non-professionals (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2020
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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