A novel method for prediction of dynamic smiling expressions after orthodontic treatment: a case report. Issue 3 (17th February 2016)

• Record Type: Journal Article
• Authors: Dai, Fanfan; Li, Yangjing; Chen, Gui; Chen, Si; Xu, Tianmin
• Is Part Of: Computer methods in biomechanics and biomedical engineering. Volume 19:Issue 3(2016)
• Page Start: 340
• Page End: 346
• Publication Date: 2016-02-17
• Subjects: cone beam computed tomography -- structured light system -- expression transfer -- smile prediction -- orthodontic treatment; Biomechanics -- Data processing -- Periodicals; Biomedical engineering -- Periodicals; Biomechanics -- Periodicals; Biomedical Engineering -- methods -- Periodicals; Computing Methodologies -- Periodicals; 612.7
• DOI: 10.1080/10255842.2015.1025767
• Languages: English
• ISSNs: 1025-5842

Abstract

Abstract : Smile esthetics has become increasingly important for orthodontic patients, thus prediction of post-treatment smile is necessary for a perfect treatment plan. In this study, with a combination of three-dimensional craniofacial data from the cone beam computed tomography and color-encoded structured light system, a novel method for smile prediction was proposed based on facial expression transfer, in which dynamic facial expression was interpreted as a matrix of facial depth changes. Data extracted from the pre-treatment smile expression record were applied to the post-treatment static model to realize expression transfer. Therefore smile esthetics of the patient after treatment could be evaluated in pre-treatment planning procedure. The positive and negative mean values of error for prediction accuracy were 0.9 and − 1.1 mm respectively, with the standard deviation of ± 1.5 mm, which is clinically acceptable. Further studies would be conducted to reduce the prediction error from both the static and dynamic sides as well as to explore automatically combined prediction from the two sides.