Attractive combinations of female gingival displays, buccal corridor sizes, and facial heights according to orthodontists, dentists, and laypeople of different ages and sexes: a psychometric study.

"Declarations Ethics approval and consent to participateThe survey was anonymous and did not collect any identifier or personal information of the judges apart from their anonymously taken age and sex and occupation; the results of the survey were completely confidential and will be used only for research purposes. The first page of the survey was an informed consent which asked the participants to begin the survey if they were consent to participate; yet the need for any signed informed consents by the survey participants were waived by the Institutional Review Board of Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran (ethics approval code: IR.AJUMS.REC.1398.650). The photo-model signed informed consent allowing the researchers to use her image (either original or after photomanipulation) for the research and/or the article without the need for masking any parts of her face. The study protocol and its ethics were approved by the Institutional Review Board of Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran (code: IR.AJUMS.REC.1398.650). All methods were performed in accordance with the relevant guidelines and regulations (including the Declaration of Helsinki); all experimental protocols were approved by the Institutional Review Board of Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran. Consent for publicationThe first page of the survey was an informed consent which asked the participants to begin the survey if they were consent to participate; yet the need for any signed informed consents by the survey participants were waived by the Institutional Review Board of Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran (ethics approval code: IR.AJUMS.REC.1398.650). The photo-model signed informed consent allowing the researchers to use her image (either original or after photomanipulation) for the research and/or the article without the need for masking any parts of her face. Competing interestsThe authors declare no competing interests. Competing interests The authors declare no competing interests."

"Funding The study was self-funded by the authors and their institution."