729 Number of fixations at left eye 174 0984A 140 0707A 171 0938A 148 0712A 158

729 number of fixations at left eye 174 0984a 140

This preview shows page 4 - 6 out of 7 pages.

0.729 Number of fixations at left eye 1.74 (±0.984)A 1.40 (±0.707)A 1.71 (±0.938)A 1.48 (±0.712)A 1.58 (±0.683)A 1.26 (±0.514)A 0.166 * Statistically significant at α=0.05 Superscript letters, values with the same letters in the superscript among observers, do not differ significantly (p> 0.05) The number of fixations on the AOI of the menton featured statistically significant differences when the image of the group with 0° female was compared to images of the groups with 2° male and 2.5° female. (p<0.05). (Table/Fig 5) The number of fixations on the AOI of the eyes did not present statistically significant differences for any magnitude of the occlusal plane (p>0.05). DISCUSSION Photographs are the most common way of diagnose rotation in the occlusal plane, and is a important resource of study for smile esthetics. Rotation of the occlusal plane canting usually is a complex treatment because can cause additional asymmetry during orthodontic treatment and uncertain stability of treatment[8,13]. . The objective this study was to evaluate smile esthetics of the occlusal plane cant via tracking by laypeople. In the current study, experts including prosthetists, periodontists, and orthodontists could have been included because they are more directly linked to esthetic rehabilitation, but only laypeople were requested to assess the images. Laypeople do not have any specific technical knowledge about the arrangement and disposition of the smile and are the most important group because their opinion is the guiding force for changing esthetic evaluation patterns [5]. The occlusal plane of 2.0° was evaluated as esthetically acceptable and was not perceived by orthodontists, general dentists, and laypersons [7]. Indeed, Kokich VG et al., determined that laypersons did not detect this type of asymmetry unless it reached a 4º inclination [14]. These findings indicate that laypeople and general practitioners consider the occlusal plane cant more acceptable than orthodontists, denoting that the category of observer affected the way smile esthetics is perceived when a rotation of the occlusal plane is 4
presented.This is contrary to the results of Padwa BL et al., suggesting that during clinical examination, the differences in detection of the occlusal plane angulation depended on the degree of rotation and not based on the experience of the observers in analyzing smile [15]. In the current study, according to the heatmap and scanpath (qualitative results), laypeople were not able to observe differences in any of the canting of the occlusal plane between 0º and 2.5º, even when the quantitative results exhibited statistically significant differences. The differences were prominent on the magnitude of 0º when compared to the magnitude of 2.5º for the female and 2.0º for the male as well as for the magnitude of 2.5º between sexes, although the results show that the higher the magnitude, the smaller number of fixations. In considering qualitative analysis, we can confirm that the raters were not able to perceive the occlusal plane cant.

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture