Rao Adithi, Badavannavar Anand, Acharya Aditya
Department of Orthodontics and Dentofacial Orthopaedics, KAHER's KLE VK Institute of Dental Sciences, Belagavi, 590010, India.
Department of Prosthodontics and Crown and Bridge, KAHER's KLE VK Institute of Dental Sciences, Belagavi, India.
J Oral Biol Craniofac Res. 2021 Apr-Jun;11(2):174-179. doi: 10.1016/j.jobcr.2021.01.001. Epub 2021 Jan 6.
Smile is one of the most effective means by which people convey their emotions. The objective of this study was to capture, analyse and measure the parameters through videos clips for studying the dynamics of posed and unposed smile and to measure the parameters through video clips for studying the dynamics of speech.
A total of 100 subjects seeking orthodontic treatment with Angle's Class I malocclusion were included in the study. The principal investigator selected the frames for speech and a panel of five members selected the appropriate frames for posed smile and unposed smiles. Frames after videography were used for measurements. Parameters like Maximum incisor exposure, Lower lip to upper incisor, Gingival exposure, Inter-labial gap etc were measured in "mm" for posed and unposed smile frames. Categorical data was compared using McNemar's test. p < 0.05 was considered significant.
The median of maximum upper incisal exposure (p = 2.2e-16), lower lip to upper incisor (p = 2.422e-13), inter-labial gap (p = 2.2e-16 ), smile width (p = 5.212e-16 ) and smile index were significant (p = 0.0001 ). There was a significant change from not exposed to exposed gingival exposure over posed smile to unposed smile (p = 0.0008). The most posterior maxillary tooth visible in the posed and unposed groups were the second premolars in 57% and 74% patients, respectively. In both the smile groups, 55% of subjects exhibited a consonant smile.
It can be concluded that the information obtained from the current video graphic study can be used as a guideline for the diagnosis and as a part of comprehensive treatment planning.
微笑是人们传达情感最有效的方式之一。本研究的目的是通过视频片段捕捉、分析和测量参数，以研究刻意微笑和自然微笑的动态变化，并通过视频片段测量语音的动态参数。
本研究共纳入100名寻求正畸治疗的安氏I类错牙合患者。主研人员选择语音帧，由五名成员组成的小组选择刻意微笑和自然微笑的合适帧。摄像后的帧用于测量。在刻意微笑和自然微笑帧中，测量最大切牙暴露量、下唇至上门牙距离、牙龈暴露量、唇间隙等参数，单位为“毫米”。分类数据采用McNemar检验进行比较。p < 0.05被认为具有统计学意义。
最大上门牙暴露量（p = 2.2e-16）、下唇至上门牙距离（p = 2.422e-13）、唇间隙（p = 2.2e-16）、微笑宽度（p = 5.212e-16）和微笑指数的中位数具有统计学意义（p = 0.0001）。从刻意微笑到自然微笑，牙龈暴露量从不暴露到暴露有显著变化（p = 0.0008）。在刻意微笑组和自然微笑组中，分别有57%和74%的患者可见的上颌最后一颗牙齿是第二前磨牙。在两组微笑中，55%的受试者表现出一致的微笑。
可以得出结论，从当前视频研究中获得的信息可作为诊断指南和综合治疗计划的一部分。
