Facial Models Suggest Less May Be More for a Successful Smile (image)

Caption
Dental show effect at different levels of angle-extent.
(a) Two smiles with smaller angle-extent combinations. (b) Two smiles with larger angle-extent combinations. Increasing dental show makes the smile worse (i.e., less successful) for (a) and better (i.e., more successful) for (b).
Credit
Helwig et al (2017)
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