Digital videographic measurement of tooth display and lip position in smiling and speech: reliability and clinical application
| Autor: | Anne Marie Kuijpers-Jagtman, Paul Oosterveld, Pieter Van der Geld, Marinus A.J. van Waas |
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| Rok vydání: | 2006 |
| Předmět: |
Adult
Male Gingiva Orthodontics Esthetics Dental Smiling stomatognathic system Image Processing Computer-Assisted Humans Speech Generalizability theory Reliability (statistics) Anterior teeth Observer Variation Digital video Reproducibility of Results Videotape Recording Middle Aged Lip stomatognathic diseases Position (obstetrics) Posterior teeth Sources of error Psychology Observer variation Tooth |
| Zdroj: | American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics. 131(3) |
| ISSN: | 1097-6752 |
| Popis: | Introduction: Tooth display and lip position in smiling and speech are important esthetic aspects in orthodontics and dentofacial surgery. The spontaneous smile and speech are considered valuable diagnostic criteria in addition to the posed social smile. A method was developed to measure tooth display in both smile types and speech. Methods: The faces of 20 subjects were individually filmed. Spontaneous smiles were elicited by a comical movie. The dynamics of the spontaneous smile were captured twice with a digital video camera, transferred to a computer, and analyzed on videoframe level. Two raters were involved. Posed social smiles and speech records were also included. Reliability was established by means of the generalizability theory. It incorporated rater, replication, and selection facets. Results: Generalizability coefficients ranged from .99 for anterior teeth to .80 for posterior teeth. The main sources of error were associated with rater and selection facets. The replication facet was a minor source of error. Conclusions: This videographic method is reliable for measurement of tooth display and lip position in spontaneous and posed smiling and speaking. Application of the method is warranted especially when obtaining an emotional smile is difficult, such as cleft lip and palate or disfigured patients. |
| Databáze: | OpenAIRE |
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