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Heo, Yoon-Young,Cho, Keun-Chul,Baek, Seung-Hak Angle Orthodontists Research and Education Foundat 2012 The Angle orthodontist Vol.82 No.5
<P>To investigate the effects of orthodontic mini-implant (OMI) shape and angled-predrilling depth on the mechanical properties of OMIs during the angled insertion procedure.</P>
Kim, Seol Hee,Hwang, Soonshin,Hong, Yeon-Ju,Kim, Jae-Jin,Kim, Kyung-Ho,Chung, Chooryung J. The Angle Orthodontist 2018 The Angle orthodontist Vol.88 No.3
<B>ABSTRACT</B><B>Objective:</B><P>To examine the changes in visual attention influenced by facial angles and smile during the evaluation of facial attractiveness.</P><B>Materials and Methods:</B><P>Thirty-three young adults were asked to rate the overall facial attractiveness (task 1 and 3) or to select the most attractive face (task 2) by looking at multiple panel stimuli consisting of 0°, 15°, 30°, 45°, 60°, and 90° rotated facial photos with or without a smile for three model face photos and a self-photo (self-face). Eye gaze and fixation time (FT) were monitored by the eye-tracking device during the performance. Participants were asked to fill out a subjective questionnaire asking, “Which face was primarily looked at when evaluating facial attractiveness?”</P><B>Results:</B><P>When rating the overall facial attractiveness (task 1) for model faces, FT was highest for the 0° face and lowest for the 90° face regardless of the smile (P < .01). However, when the most attractive face was to be selected (task 2), the FT of the 0° face decreased, while it significantly increased for the 45° face (P < .001). When facial attractiveness was evaluated with the simplified panels combined with facial angles and smile (task 3), the FT of the 0° smiling face was the highest (P < .01). While most participants reported that they looked mainly at the 0° smiling face when rating facial attractiveness, visual attention was broadly distributed within facial angles.</P><B>Conclusions:</B><P>Laterally rotated faces and presence of a smile highly influence visual attention during the evaluation of facial esthetics.</P>
Huh, Young Jae,Huh, Kyung-Hoe,Kim, Hong-Kyun,Nam, Shin-Eun,Song, Hye Yoon,Lee, Joo-Hoon,Park, Young-Seok The Angle Orthodontist 2014 The Angle orthodontist Vol.84 No.2
<B>ABSTRACT</B><B>Objective:</B><P>To investigate the constancy of the angle between the Frankfort horizontal plane (FH) and the sella-nasion line (SN) using longitudinal data.</P><B>Materials and Methods:</B><P>Longitudinal lateral cephalometric data of 223 children (116 girls and 107 boys) from 6 to 14 years of age were used. The angle between FH and SN (SNFH), the distance from FH to the nasion (NFH), the distance from FH to the sella (SFH), and the differences between the NFH and SFH (Δ) were also measured. All data were analyzed statistically using independent t-tests and mixed-effect regression model analysis.</P><B>Results:</B><P>The mean SNFH values showed some minor fluctuations, ranging from 9.26° to 9.74° in girls and 8.45° to 8.95° in boys. The mean NFH and SFH values gradually increased according to age irrespective of sex. There were statistically significant differences by sex for all measurements at several ages. The annual change in SFH and Δ showed sexual dimorphism.</P><B>Conclusions:</B><P>There are variations among individuals in the angle between the FH and SN. However, within an individual, the angle does not vary significantly over time during the observation period.</P>
Ahn, Hyo-Won,Kim, Keun-Woo,Yang, Il-Hyung,Choi, Jin-Young,Baek, Seung-Hak Angle Orthodontists Research and Education Foundat 2012 The Angle orthodontist Vol.82 No.5
<P>To determine the difference in the effects of facemask with miniplate (FM-MP) anchorage on maxillary protraction in growing cleft patients between unilateral (UCLP) and bilateral cleft lip and palate (BCLP) groups.</P>
Seo, Yu-Jin,Park, Ji-Wan,Kim, Young Ho,Baek, Seung-Hak Angle Orthodontists Research and Education Foundat 2011 The Angle orthodontist Vol.81 No.6
<P>To test the null hypothesis that there is no significant difference in the initial growth pattern among three cleft types before alveolar bone graft (ABG) according to cleft type (unilateral cleft lip and alveolus [UCLA], unilateral cleft lip and palate [UCLP], and cleft palate [CP]).</P>
Lee, Seung-Pyo,Lee, Shin-Jae,Lim, Bum-Soon,Ahn, Sug-Joon Angle Orthodontists Research and Education Foundat 2009 The Angle orthodontist Vol.79 No.2
<P>OBJECTIVE: To test the hypothesis that there are no significant differences in the adhesion of mutans streptococci (MS) to various orthodontic materials based on their surface characteristics. MATERIALS AND METHODS: Surface roughness (SR) and surface free energy (SFE) characteristics were investigated for nine different orthodontic materials (four orthodontic adhesives, three bracket raw materials, hydroxyapatite blocks, and bovine incisors) using confocal laser scanning microscopy and sessile drop method. Each material, except the bovine incisors, was incubated with whole saliva or phosphate-buffered saline for 2 hours. Adhesion assays were performed by incubating tritium-labeled MS with each material for 3 or 6 hours. RESULTS: Orthodontic adhesives had higher SFE characteristics and lower SR than bracket materials. Orthodontic adhesives showed a higher MS retaining capacity than bracket materials, and MS adhesion to resin-modified glass ionomer and hydroxyapatite was highest. Extended incubation time increased MS adhesion, while saliva coating did not significantly influence MS adhesion. SFE, specifically its dispersive and polar components, was positively correlated with MS adhesion, irrespective of saliva coating. CONCLUSIONS: The hypothesis is rejected. This study suggests that SFE characteristics play an important role in the initial MS adhesion to orthodontic materials.</P>
Kim, Seung-Jae,Choi, Jin-Young,Baek, Seung-Hak Angle Orthodontists Research and Education Foundat 2012 The Angle orthodontist Vol.82 No.6
<P>To compare the effect of canting correction in anterior maxillary transverse occlusal planes (AMTOP) and posterior maxillary transverse occlusal planes (PMTOP) on the change of lip canting (LC) in two-jaw surgery (TJS) cases.</P>
Cho, Keun-Chul,Baek, Seung-Hak Angle Orthodontists Research and Education Foundat 2012 The Angle orthodontist Vol.82 No.4
<P>To investigate the effects of orthodontic mini-implant (OMI) shape and predrilling depth on the mechanical properties of OMIs during the insertion procedure.</P>
In vitro and in vivo mechanical stability of orthodontic mini-implants.
Cho, Il-Sik,Kim, Sung-Kyun,Chang, Young-Il,Baek, Seung-Hak Angle Orthodontists Research and Education Foundat 2012 The Angle orthodontist Vol.82 No.4
<P>To compare in vivo and in vitro mechanical stability of orthodontic mini-implants (OMIs) treated with a sandblasted, large-grit, and anodic-oxidation (SLAO) method vs those treated with a sandblasted, large-grit, and acid-etching (SLA) method.</P>