Publications

Scholarly Journals--Published

• Impact of Dental Midline Shift on the Perception of Facial Attractiveness in Young Adults. Published at the Journal of Dental Medicine Abstract: Background/Objectives: The aim of this study was to quantify the threshold of a dental midline shift that would compromise facial attractiveness and indicate a need for treatment from the points of view of laypeople and dental professionals. Methods: Whole-face natural photographs of a male and a female model were digitally manipulated to create various degrees of upper and lower dental midline shifts through bodily movement of the upper or lower midlines as well as alteration of the axial inclination of the upper teeth. The samples were then assessed by two groups of observers (laypeople (LP) and dental professionals (DP)). Results: The lower midline shift did not negatively affect the DP and LP’s perceptions of smile attractiveness. The first significant loss of attractiveness was registered by the DP with an upper midline shift of 1 mm in the female model. However, the LP registered this at 2 mm. The DP registered the necessity of treatment at a threshold of 2 mm in the female model and 3 mm in the male model. LP identified the need for treatment at 3 mm for both males and females. The female model was judged more critically than her male counterpart by both female and male observers. Conclusions: DP assess the midline deviation more critically than LP. Both DP and LP were more sensitive to midline deviations in the female model regardless of their own gender. Both groups registered the need for treatment at a higher threshold than the reduction in smile attractiveness. (07/2024)
• Impact of Dental Midline Shift on the Perception of Facial Attractiveness in Young Adults. Authors: Babak Sayahpour 1 , Sara Eslami 1,* , Ralf Usherenko 2, Abdolreza Jamilian 3,4 , Mauricio Gonzalez Balut 5, Nicolas Plein 1, Vincenzo Grassia 6 and Ludovica Nucci 6 Journal of Dental Medicine Abstract: Background/Objectives: The aim of this study was to quantify the threshold of a dental midline shift that would compromise facial attractiveness and indicate a need for treatment from the points of view of laypeople and dental professionals. Methods: Whole-face natural photographs of a male and a female model were digitally manipulated to create various degrees of upper and lower dental midline shifts through bodily movement of the upper or lower midlines as well as alteration of the axial inclination of the upper teeth. The samples were then assessed by two groups of observers (laypeople (LP) and dental professionals (DP)). Results: The lower midline shift did not negatively affect the DP and LP’s perceptions of smile attractiveness. The first significant loss of attractiveness was registered by the DP with an upper midline shift of 1 mm in the female model. However, the LP registered this at 2 mm. The DP registered the necessity of treatment at a threshold of 2 mm in the female model and 3 mm in the male model. LP identified the need for treatment at 3 mm for both males and females. The female model was judged more critically than her male counterpart by both female and male observers. Conclusions: DP assess the midline deviation more critically than LP. Both DP and LP were more sensitive to midline deviations in the female model regardless of their own gender. Both groups registered the need for treatment at a higher threshold than the reduction in smile attractiveness. (07/2024)

Scholarly Journals--Submitted

• "Impact of Dental Midline Shift on the Perception of Facial Attractiveness in Young Adults" Authors: Babak Sayahpour 1 , Sara Eslami 1,* , Ralf Usherenko 2, Abdolreza Jamilian 3,4 , Mauricio Gonzalez Balut 5, Nicolas Plein 1, Vincenzo Grassia 6 and Ludovica Nucci 6 Journal of dental Medicine Abstract: Background/Objectives: The aim of this study was to quantify the threshold of a dental midline shift that would compromise facial attractiveness and indicate a need for treatment from the points of view of laypeople and dental professionals. Methods: Whole-face natural photographs of a male and a female model were digitally manipulated to create various degrees of upper and lower dental midline shifts through bodily movement of the upper or lower midlines as well as alteration of the axial inclination of the upper teeth. The samples were then assessed by two groups of observers (laypeople (LP) and dental professionals (DP)). Results: The lower midline shift did not negatively affect the DP and LP’s perceptions of smile attractiveness. The first significant loss of attractiveness was registered by the DP with an upper midline shift of 1 mm in the female model. However, the LP registered this at 2 mm. The DP registered the necessity of treatment at a threshold of 2 mm in the female model and 3 mm in the male model. LP identified the need for treatment at 3 mm for both males and females. The female model was judged more critically than her male counterpart by both female and male observers. Conclusions: DP assess the midline deviation more critically than LP. Both DP and LP were more sensitive to midline deviations in the female model regardless of their own gender. Both groups registered the need for treatment at a higher threshold than the reduction in smile attractiveness. (05/2024)
• The perception of facial esthetics with regard to different buccal corridors and facial proportions. Authors: Babak Sayahpour  , Sara Eslami  , Brenda Schulz  , Mauricio Gonzalez Balut , Nicolas Plein , Vincenzo Grassia  and Ludovica Nucci  APOS Trends in Orthodontics Aim: The aim of the study was to examine the effects of buccal corridor width on the perception of facial esthetics and to determine the ideal buccal corridor size. Another aim was to determine the influence of the facial shape or gender on the ideal size of buccal corridors and whether there are differences in perception between laypeople and dental professionals.Materials and methods: One female and one male study model were selected and photo-graphed in portrait format. Using Photoshop, a total of 30 digitally manipulated images were generated from the original photographs, representing five different buccal corridor sizes (2%, 10%, 15%, 22% and 28%) and three different facial shapes (dolichol-, normo- and brachyfacial). The images were evaluated by two groups of laypeople (LP) and dental professionals (DP). Each group consisted 20 male and 20 femaleparticipantswithmeanageof 30.33 $5.19(LP)and 32.03 4.43(DP). Descriptive statistics, Wilcoxon sign-rank test, Mann-Whitney Utest, and Bonferroni correction were then used to assess the significance of the data, identify differences between genders and the impact of facial form.Results: The buccal corridor width was found to have an influence on the facial and smile esthetics. The 2% buccal corridor proved to be the best rated size and stood out from the other sizes in most face shapes with a significance of p < 0.004. Adifference in the evaluation between the DP and LP could not be found.Conclusion: Large buccal corridors seem to negatively affect the facial esthetics. The results of the present study suggest an ideal value of the buccal corridor at 2%. (04/2024)