Department of Health, Southwest Bahia State University-UESB, Jequié, Bahia, Brazil.
Am J Orthod Dentofacial Orthop. 2013 Mar;143(3):371-5. doi: 10.1016/j.ajodo.2012.10.020.
The aim of this research was to evaluate esthetic perceptions of the smile, especially regarding black spaces between the maxillary central incisors, by laypersons in 3 age groups.
Photographs were digitally manipulated to simulate black spaces in the region of the maxillary central incisor crenations. The images were printed on photographic paper and attached to a questionnaire that was given to 150 laypersons in 3 age groups: 15 to 19, 35 to 44, and 65 to74 years. They were asked to use a visual analog scale method to rate the smiles from a score of 0, corresponding to "not very attractive," to 10, "very attractive." Differences between the examiners were verified by the Mann-Whitney test. All statistics were performed with a degree of confidence of 95%.
The results showed that older persons had more difficulty perceiving black spaces. In the younger groups, the subjects were better able to perceive the black spaces, and the larger the black space, the less attractive they rated the photograph (P < 0.01).
Younger people are more likely than older people to perceive black spaces in maxillary incisor crenations. The larger the black spaces, the less attractive they rate the smile.
本研究旨在评估外行人对微笑的审美感知，特别是上颌中切牙切缘处的黑三角，分为 3 个年龄组。
通过数字手段模拟上颌中切牙切缘处的黑三角。将图像打印在照相纸上，并附加到问卷上，该问卷分发给 3 个年龄组的 150 名外行人：15-19 岁、35-44 岁和 65-74 岁。他们被要求使用视觉模拟评分法，从 0 分（表示“不太吸引人”）到 10 分（表示“非常吸引人”）来评价微笑。通过曼-惠特尼检验验证了检验员之间的差异。所有统计数据的置信度均为 95%。
结果表明，老年人更难察觉黑三角。在年轻组中，受试者能够更好地察觉黑三角，黑三角越大，他们对照片的评价就越低（P<0.01）。
年轻人比老年人更有可能察觉到上颌中切牙切缘处的黑三角。黑三角越大，他们对微笑的评价就越低。
