Published Paper Details:

Objective- To evaluate the reproducibility of posed smiles and dynamic smiles along with the difference between them. Material & method- Two frontal photos & videos (30 frames per second for 5 seconds) at different intervals were recorded following the same procedure & instructing the subject to say cheese. The records were then transferred to the computer & the video was converted into 150 frames & every 16th frame was separated from which the frame with dynamic smile was selected. Both posed smiles i.e. the smiles captured using photographs & the dynamic smiles i.e. the smile chosen from the videos were then evaluated by making a smile mesh to measure the various parameters using Bersoft Image Measurement Software. Results- Overall reproducibility of both posed and dynamic smiles respectively were significantly correlated with only one parameter i.e. commissure corridor of the right side being statistically different (icc=0.119) in the posed smile. On comparing posed and dynamic smile with each other a significant difference (p<0.05) was found in four out of ten parameters which were commissure corridor left and right side, and buccal corridor left and right side. Conclusion-Both posed and dynamic smiles can be reliably reproduced using a standardized natural head position protocol. Although both posed and dynamic smile are positively correlated but a dynamic smile gives more information related to dynamic relationship of lip and teeth. Thus, making it a better option for accurate treatment planning and post treatment outcomes.