Lira Dos Santos Elis Janaina, Dantas Alana Moura Xavier, Vilela Raíssa Marçal, de Lima Karina Jerônimo Rodrigues Santiago, Beltrão Rejane Targino Soares
1 Department of Prosthodontics and Periodontics, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, São Paulo, Brazil.
2 Department of Material Engineering, Laboratory Evaluation and Development of Biomaterials; Federal University of Campina Grande (UFCG), Paraíba, Brazil.
J Orthod. 2019 Jun;46(2):137-142. doi: 10.1177/1465312519839713. Epub 2019 Mar 28.
To evaluate patient perception of the smile focused on analysis of the upper incisors.
Cross-sectional study.
Department of Clinical and Social Dentistry at Federal University of Paraíba, João Pessoa, Brazil.
The sample consisted of 135 individuals (73 women and 62 men).
Images with different characteristics associated with the incisal edges were shown at random and analysed using a Likert scale. Data were analysed using the Chi-square test or Fisher's exact test with a statistically significant difference ( P < 0.05).
Smile I (difference of 1.5 mm in relation to the central incisor and lateral) was considered the most aesthetic, while Smile III (no difference in height between the central and lateral incisors) was the least aesthetic. A significant difference was found between perception of smile II (difference of 1 mm in relation to the central incisor and lateral) and age groups ( P < 0.005), with 31% (n = 13) of individuals aged 45-64 years considering smile II as not pleasant, 4.4% (n = 2) aged 15-24 years and 8.3% (n=4) aged 25-44 years and 4.4% (n = 2) aged 15-24 years considering the same. A significant difference was also found in relation to educational background of the assessor and smile perception, with smile III ( P = 0.0441) and smile IV ( P = 0.0053) considered the most aesthetic ( P = 0.0116).
The smile considered most attractive among the sample was that with 1.5 mm steepness between the central and lateral incisors, while a flat smile arc was considered least attractive.
通过对上颌切牙的分析来评估患者对微笑的认知。
横断面研究。
巴西若昂佩索阿帕拉伊巴联邦大学临床与社会牙科系。
样本包括135人（73名女性和62名男性）。
随机展示具有不同切缘特征的图像，并使用李克特量表进行分析。数据采用卡方检验或费舍尔精确检验进行分析，差异具有统计学意义（P < 0.05）。
微笑I（中切牙与侧切牙之间相差1.5毫米）被认为最具美感，而微笑III（中切牙和侧切牙高度无差异）最缺乏美感。在对微笑II（中切牙与侧切牙之间相差1毫米）的认知与年龄组之间发现了显著差异（P < 0.005），45 - 64岁的个体中有31%（n = 13）认为微笑II不美观，15 - 24岁的个体中有4.4%（n = 2）、25 - 44岁的个体中有8.3%（n = 4）以及15 - 24岁的个体中有4.4%（n = 2）也持相同看法。在评估者的教育背景与微笑认知方面也发现了显著差异，微笑III（P = 0.0441）和微笑IV（P = 0.0053）被认为最具美感（P = 0.0116）。
样本中被认为最具吸引力的微笑是中切牙与侧切牙之间倾斜度为1.5毫米的微笑，而平坦的微笑弧度被认为最缺乏吸引力。
