* Simply place two fingers on each corner of your mouth and try to smile against the resistance they create. * Hold each ...

Smile lines, commonly known as laugh lines or nasolabial folds, refer to the deep creasing of the skin around the mouth. Typically, these lines appear on both sides of the mouth when you smile ...

In a dental autotransplant, a tooth – usually a premolar – is moved from one location in the mouth to another. Read more at ...

All smiling involves contraction of the zygomatic major muscles, which lifts the corners of the mouth. But a Duchenne smile is characterised by the additional contraction of the orbicularis oculi ...