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Analysis of different characteristics of smile
Mehwish Khan1, Syed Murtaza Raza Kazmi2, Farhan Raza Khan2
11Sindh Institute of Oral Health Sciences, Jinnah Sindh Medical University, Karachi, Pakistan.
Introduction:
Analysis of smile is imperative in the diagnosis and treatment planning phases of aesthetic dentistry.
Aim:
To evaluate the components of smile among students of a dental institution.
Methods:
Frontal view digital photographs with posed smile of 157 dental students were assessed using Adobe Photoshop7.0. Smile characteristics evaluated included; smile line, smile arc, smile design, upper lip curvature, labiodental relationship and number of teeth displayed. Data were analyzed using SPSS version 23.0. Pearson chi-square test was used to determine the gender based differences for various parameters.
Results:
Average smile line (43.3%), consonant smile arcs (45.2%), cuspid smiles (45.9%), upward lip curvature (43.9%), maxillary anterior teeth not covered by lower lip (60.5%) and teeth displayed up to first premolars (35.7%). Gender based differences were not statistically significant except for smile arc (p value = 0.02) and number of teeth displayed (p value < 0.001). There was a significant relationship between lip curvature and smile pattern (p value < 0.001) and lip curvature and smile arc (p value = 0.01) revealing that upward lip curvature was associated with commissure type smiles and consonant smile arcs.
Conclusions:
The smile characteristics should be considered before beginning the aesthetic treatment of the patient to obtain adequate results in oral rehabilitation.
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