The influence of orthodontic treatment on esthetic perception of smiling face: an functional MRI study

doi:10.3877/cma.j.issn.1674-1366.2015.01.011

Abstract

Abstract:

Objective

To explore the brain activation pattern when individuals judged attractiveness of faces before and after orthodontic treatment by using functional MRI (fMRI) .

Methods

Ninety-six beautiful/ugly faces before and after orthodontic treatment were used as stimuli. fMRI scans were acquired while 20 healthy subjects performed the facial attractiveness judgment. fMRI data was processed by SPM8 software.

Results

Facial attractiveness judgment was associated with greater activation in occipital lobe, temporal lobe and fusiform gyrus. For attractive people, the faces before orthodontic treatment compared to those after orthodontic treatment elicited significant difference in right mediate frontal gyrus, right middle frontal gyrus and right precentral gyrus. For unattractive people, the faces before orthodontic treatment compared to those after orthodontic treatment elicited significant difference in right paracentral lobule, right inferior parietal lobule, left middle temporal gyrus, bilateral cingulate gyrus and left precuneate gyrus.

Conclusion

Facial attractiveness judgment was associated with multiple brain regions. The faces before orthodontic treatment compared to those after orthodontic treatment elicited significant difference in the regions responsible for cognition, attention and emotion.

Key words: Orthodontic treatment, Facial attractiveness judgment, Functional MRI

Yuanyuan Zheng, Zhiyang Zhou, Chen Zhou, Weicai Wang, Wei Zhang, Chuan Zhou, Baicheng Bao. The influence of orthodontic treatment on esthetic perception of smiling face: an functional MRI study[J]. Chinese Journal of Stomatological Research(Electronic Edition), 2015, 09(01): 69-76.

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URL: https://zhkqyxyjzz.cma-cmc.com.cn/EN/10.3877/cma.j.issn.1674-1366.2015.01.011

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Figures/Tables 15

References 21

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图片类型	正畸前	正畸后	t值	P值
高吸引力	3.92 ± 0.43	5.98 ± 0.27	19.48	< 0.01
低吸引力	1.61 ± 0.27	3.78 ± 0.26	22.00	< 0.01

图片类型	正畸前	正畸后	t值	P值
高吸引力	3.92 ± 0.43	5.98 ± 0.27	19.48	< 0.01
低吸引力	1.61 ± 0.27	3.78 ± 0.26	22.00	< 0.01

图片类型	正畸治疗前	正畸治疗后
高吸引力	36.60 ± 12.94	90.90 ± 6.22
低吸引力	0.70 ± 1.17	48.55 ± 16.52

图片类型	正畸治疗前	正畸治疗后
高吸引力	36.60 ± 12.94	90.90 ± 6.22
低吸引力	0.70 ± 1.17	48.55 ± 16.52

图片类型	正畸治疗前	正畸治疗后
高吸引力	961.19 ± 305.20	846.09 ± 248.68
低吸引力	705.01 ± 148.16	1054.40 ± 355.12

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