Furkan Dindaroğlu

This study aimed to evaluate mandibular ramus asymmetry in individuals with unilateral congenital tooth agenesis using panoramic radiography. The results w

The visual attention provides an objective perspective on how a stimulus take attention. In dentistry, one of the important facial determinants in esthetic perception is the mandibular asymmetry. The study aimed to evaluate the eye movements of the orthodontists and non-professionals on the images with different severity of mandibular asymmetry using eye tracking technology. The eye movements of 26 orthodontists and 30 non-professionals were captured. Thirty images were visually evaluated for the presence of mandibular asymmetry by two orthodontists. 2 mm, 4 mm, 6 mm, and 8 mm chin deviation were simulated on the images and the images without asymmetry were considered as control group. A total of 50 photographs from 10 individuals were included in the study. Participants’ eye movements were recorded using an Eyelink 1000 plus eye-tracking device (Sr-Research, Canada). Repeated Measures Analysis of Variance (ANOVA) was used for statistical comparisons. The number of fixations on the lower lip-chin area in either the right or left direction did not show a statistically significant difference. (F(1,000;59,000) = 2.133, p > 0.05, ). Time to first fixation was faster to the lower lip-chin area in 8 mm asymmetry condition compared to 2 mm (F(1,2) = 31.423, p < 0.05, ηp2 = 0.940). Orthodontists made less fixations before the lower lip-chin area in 8 mm condition compared to 2 mm (F(1,2) = 20.758, p < 0.05, ηp2 = 0.912). While the direction of mandibular asymmetry did not affect voluntary attention, an increase in asymmetry, regardless of profession, attracted more attention to the lower lip-chin area. While the 8 mm asymmetry caught the involuntary attention of orthodontists, the same did not occur in non-professionals.

Effects of Emotional States on Reproducibilities of Rest Position, Social and Spontaneous Smiles, and Speech - Turkish Journal of Orthodontics

Objective This study aimed to evaluate social smile asymmetry in patients with unilateral impacted maxillary canine on 3D stereophotogrammetric images. Material and methods The 3D social smile images of participants with unilateral impacted maxillary canine (n:20) and without impaction as a control group (n:20) were included. The images were recorded with a hand-held 3D stereophotogrammetry device (Fuel3D® Scanify®) and Geomagic Essentials 2 reverse engineering software were used for analyses. After the orientation process of the 3D records, the tissues around the smile area were divided into five morphological regions: cheek, upper lip lateral and medial, and lower lip lateral and medial. The deviation margins in the negative and positive directions for the 95% mesh rate and the total percentages of meshes between − 0.5- and + 0.5-mm deviations were calculated. ICC, paired samples t test, independent samples t test, and the Mann–Whitney U test were used for statistical analyses. Results In individuals with impacted canine, the amount of maximum positive deviation in the upper lip medial was 5.64 mm ± 1.46 and maximum negative deviation was − 4.6 mm ± 1.17. In the control group, mean of deviation limits for all parameters was less than 1.19 mm ± 2.62, while in individuals with unilateral impacted maxillary canine, the maximum value was 8.34 mm ± 2.23. The mesh percentage between − 0.5 and 0.5-mm deviations was over 95% in all morphological areas in the control group, while in the impacted canine group, the number of meshes within the specified deviation limits was less than 95%. Conclusion Individuals with unilateral impacted maxillary canine exhibit greater asymmetry in social smile compared to the control group, with the asymmetry being most prominent near the corners of the mouth and cheeks. Clinical relevance Amount of asymmetry was higher in impaction group compared to the control group in social smile. The quantification of a possible smile asymmetry due to the impacted canine is crucial for the diagnosis and treatment planning of orthodontic and/or orthognathic cases for ideal aesthetic results. Hence, smile asymmetry should not be overlooked and should be considered in diagnosis and treatment planning.

Objective: To assess the nasolabial symmetry in smile and resting position in individuals with nonsyndromic unilateral cleft lip and palate (UCLP) and compare with Class I individuals without cleft lip and palate (CLP). Materials and Methods: Frontal photographs of 40 individuals with UCLP (mean age 14.30 ± 0.25 years; 20 female, 20 male) and 40 skeletal Class I individuals without CLP (mean age 14.60 ± 0.34 years; 20 female and 20 male) were examined. Bland–Altman Levels of Agreements, Mann–Whitney U test, independent sample t-test were conducted, and intraclass correlation coefficients (ICCs) were calculated for statistical analysis. Results: Differences in the transverse lip distance (d-d’) and vertical lip height at crista philtri (e-e’) were lesser in the UCLP group at smile ( P = .001; P = .005, respectively). When comparing the differences in these measurements at rest between control and UCLP groups, vertical lip height was longer at crista philtri (e-e’) ( P = .014), crista philtri was more laterally located (f-f’) ( P = .002), and the transverse lip distance was greater (d-d’) ( P = .004) in the UCLP group. Distance of the crista philtri to the midline of the face (f-f’) ( P = .007) were higher in the UCLP group during smiling compared to control group. Conclusions: Nasolabial region asymmetry in smiling and rest position in individuals with UCLP was significantly different from the control group. However, the asymmetry in the nasolabial region, which is more evident in the resting position in individuals with UCLP, decreases during smiling.