objectives: this study aimed to assess and compare the perception of laypersons and dental professionals of smile esthetics based on two factors namely gingival display and alignment of teeth. materials and methods: a total of 32 females were randomly selected among dental students in the international campus of school of dentistry, tehran university of medical sciences (tehran, iran) with no p...

BACKGROUND To compare the refractive results and higher-order aberrations (HOAs) after small incision lenticule extraction (SMILE) in high myopia and mild to moderate myopia patients. METHODS This prospective study included 165 eyes (86 patients) undergoing SMILE. According to the preoperative spherical equivalent (SE), treated eyes were divided into two groups: the high myopia group (more th...

Smiling during talking yields speech with higher formants, and hence larger formant dispersion. Previous studies have shown that motor resonance during perception of words related to smiling can activate muscles responsible for the smiling action. If word perception causes smiling activation for such smile-related words, then this motor resonance may occur also during production, resulting in l...

introduction: the aim of this study was to evaluate the role of teeth and lips in the perception of smile esthetics.   materials and methods: thirty women, ranging between 20 and 30 years of age, all with class i canine and molar relationships and no history of orthodontic treatment, were chosen. five black and white photographs were taken of each participant in a natural head position while sm...

INTRODUCTION The objective of this study was to define age-related changes in the smile. The areas of interest were upper lip length at smile and repose, upper lip thickness at smile and repose, maxillary incisal display at smile, interlabial gap height at smile, smile index, percentage of buccal corridors, intercommissural width at rest, smile height, and smile arc. A secondary objective was t...