Dynamic smile analysis in young adults - Corrective Dentistry (Orthodontics) Articles

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Dynamic smile analysis in young adults
American Journal of Orthodontics and Dentofacial Orthopedics
Volume 132, Issue 3, September 2007, Pages 307-315

Christopher Maulik, a and Ravindra Nanda, b
a - Private practice, San Diego, CA.
b - Orthodontic Alumni Endowed Chair, Professor and head, Department of Craniofacial Sciences; Chair, Division of Orthodontics, University of Connecticut School of Dental Medicine, Farmington, CT.
Received 11 August 2005; revised 28 November 2005; accepted 28 November 2005. Available online 7 September 2007.

Introduction: Current trends in orthodontics place greater emphasis on smile esthetics, yet few studies provide averages and norms for the smile. The purposes of this study were to provide averages for various components of the smile and to compare some of these in orthodontically treated and untreated groups. Also, smiles of patients with and without rapid maxillary expansion (RME) were compared.

Methods: Video equipment was used to capture smiles in 230 subjects.

Results: The majority of subjects showed on smile flat smile arc, back to the second maxillary premolar, and an 11% buccal corridor. The orthodontically treated group showed a statistically significant more parallel smile arc compared with the untreated group. The RME group had statistically significant less buccal corridor compared with the nonexpanded subjects.

Conclusions: This study helps to establish dynamic norms for the smile and shows that orthodontic treatment

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