The Psychosocial Impact of Dental Esthetics in Undergraduates with Borderline Malocclusion.

Background: The study investigates the existing correlation between self-perceived malocclusion, the psychosocial impact of dental esthetics, and whether this link involves personality traits. Methods: The 179 questionnaires from 615 undergraduates in Wenzhou were used for analysis after applying the exclusion criteria. The Psychosocial Impact of the Dental Aesthetics Questionnaire (PIDAQ) was administered to evaluate participants' perceptions of the psychosocial impacts of malocclusion. The need for orthodontic treatment was assessed using the Index of Orthodontic Treatment Need (IOTN). The Chinese version of the Eysenck Personality Questionnaire-Short Scale (EPQ-RSC) evaluated participants' personality characteristics. The Kruskal-Wallis test was used to assess differences between the IOTN-Dental Health Component (DHC) and expectations of orthodontic treatment. Linear regression was applied with PADAQ and its subscale scores against possible variables. Results: The total and subscale PIDAQ scores were positively correlated with neuroticism. Total PIDAQ scores, the DHC, and the Aesthetic Component (AC) were significantly positively correlated with the subjective AC. The DHC was significantly negatively correlated with extroversion. Conclusions: We confirmed a modest link between the need for orthodontic treatment and the psychosocial impact of dental esthetics.

Preferences of color and lip position for facial attractiveness by laypersons and orthodontists.

BACKGROUND: Previous studies have reported some evaluation methods about profiles, but so far, they have no consistent agreement on the esthetic profiles of color images. Thus, the aim of this study was to determine whether the judges have different preferences about the color of the photograph and lip position for esthetic profiles when comparing a Chinese boy and girl. METHODS: The photographic records of a Chinese boy and girl with a good balanced profile were randomly selected. The images of the patients' profile were altered to produce silhouettes and black and white and color photographs (a total of six images). After evaluation by the judges, the best two photographs of the boy and girl were used to produce images of anterior-posterior lip positions with -6, -4, -2, 0, +2, +4, and +6 mm in relation to the esthetic plane, which was created by Ricketts. The judges were invited to enumerate the images in the order in which they considered the most attractive. RESULTS: The chromophotograph was chosen as the best way to express the facial profile in both the boy and girl. The profiles with a deviation of -4 mm in the boy and a deviation of -2 mm in the girl from line E were considered as the most attractive, and the image with a deviation of +6 mm from the normal line E was considered the least attractive. There were statistically significant differences between the preferences of the profiles of the boy and girl; the same results were recorded in the variables educational background and clinic role of the judges. CONCLUSION: The chromophotograph was considered as the best way to evaluate the esthetic profiles, and the judges preferred the boy with a concave profile than the concave profile of the girl.

[Prediction and assessment of facial profile after bimaxillary orthognathic surgery in skeletal Class III malocclusion].

PURPOSE: To predict and assess the facial profile after bimaxillary orthognathic surgery in a patient model. METHODS: One patient with skeletal Class III malocclusion was selected. The orthognathic surgery design was simulated through Photoshop CS4 software. Preoperative photograph and lateral cephalometric radiograph were processed to produce the first standard facial profile photography P1. The maxillary hard tissue was moved forward according to Andrews theory II, and soft tissue also moved in proportion until the mandible recessed to the Chinese G-Sn-Pog' angle .Then the mandible was moved forward and back ±1,±2,±3,±5,±7 mm, generating 20 facial profile photographs. Two groups of reviewer were chosen for evaluation:specialists (40 orthodontists),undergraduates (68 undergraduates from Chongqing Medical University).They were asked to rank the 21 random profiles in descending order. The difference of the score of 21 photographs given by two groups of reviewer was compared using Wilcoxon rank sum test with SPSS13.0 software package. RESULTS: The scores of 21 profile photographs were significantly different(P<0.05).Profile D3 was considered to be the most beautiful,followed by D2,D1,B1,A1,P1,C1,A2 and B2. C4,A5,B5 and C5 were not acceptable. The scores for each photograph given by the two groups of reviewer were not significantly different (P>0.05). CONCLUSIONS: The reviewers give different scores for 21 profiles. Straight profile is most beautiful, followed by profile with minor mandibular or chin retraction.Profiles with severe protrusion or retrusion is not acceptable.