Dynamic smile visualization and quantification: part 2. smile analysis and treatment strategies

Dynamic smile analysis: Changes with age

“…[18][19][20] Some notable differences were the camera and software used. In this study, a newer miniDV camera (Canon GL-2) was used to create better resolution of JPEG files.…”

“…[18][19][20] Now researchers have the ability to be precise by choosing from about 150 frames (for a 5 second video at 30 frames per second).…”

“…Recent advances in technology have made it possible to study the smile through the use of videography. [18][19][20] By looking at the smile in a video, one can identify a more standardized smile (greatest width), thus minimizing the error when studying one snapshot. The goal of this study was to gain knowledge and understanding on how the smile changes with age.…”

“…[18][19][20] This method uses videography and computer software to record a smile. A digital video camera is mounted on a stand, placed at a fixed distance from the subject, the lens is set to be parallel to the true perpendicular and the face in natural head position, while the camera is raised to the level of the subject's lower facial third.…”

“…To quantify the frontal smile Ackerman et al [18,19,45] described smile index as the area framed by the lips during social smile. The smile index was determined by dividing the outer intercommissural width by the interlabial height during smile.…”