https://scholarworks.korea.ac.kr/kumedicine/handle/2020.sw.kumedicine/408 Sun, 05 Apr 2026 16:18:04 GMT 2026-04-05T16:18:04Z https://scholarworks.korea.ac.kr/kumedicine/handle/2020.sw.kumedicine/49389 Title: Prescription of antibiotics after tooth extraction in adults: a nationwide study in Korea Authors: Choi, Yoon-Young Abstract: Objectives: This study aimed to understand the nationwide patterns of antibiotic prescription after tooth extraction in adult patients. Materials and Methods: This study analyzed dental records from the National Health Insurance Service-National Sample Cohort (NHIS-NSC) database on 503,725 tooth extractions performed in adults (>= 19 years) during 2011-2015. Patient sex, age, household income, systemic disease (diabetes mellitus and hypertension), type of dental institution, region of dental institution, year of prescription, and type of tooth extraction procedure were considered. The antibiotic prescription rate and broad-spectrum antibiotic prescription frequency were analyzed using chi-squared tests. Factors affecting the prescription of broad-spectrum antibiotics were evaluated using multivariate logistic regression analysis. Results: The rate of antibiotic prescription after tooth extraction was 81.85%. Penicillin was most commonly prescribed (45.25%), followed by penicillin with beta-lactamase inhibitors (18.76%), metronidazole (12.29%), and second- to fourth-generation cephalosporins (11.52%). The proportion of broad-spectrum antibiotics used among all prescribed antibiotics was 45.88%. Conclusion: The findings of this study demonstrate that the rate of antibiotic prescription after tooth extraction is higher in Korea than in other countries. Furthermore, broad-spectrum antibiotics are used more frequently, which may indicate unnecessary drug prescription, an important contributor to antibiotic resistance. Sat, 01 Feb 2020 00:00:00 GMT https://scholarworks.korea.ac.kr/kumedicine/handle/2020.sw.kumedicine/49389 2020-02-01T00:00:00Z https://scholarworks.korea.ac.kr/kumedicine/handle/2020.sw.kumedicine/2956 Title: Colorimetric evaluation of white spot lesions following external bleaching with fluoridation: An in-vitro study Authors: Choi, Yoon Young; Lee, Dong-Yul; Kim, Yae-Jin Abstract: Objective: This study was performed to investigate the effects of external tooth bleaching with flouridation on the appearance of white spot lesions (WSLs) in vitro. Methods: In total, 125 bracket-bonded bovine incisor enamel blocks with artificial WSLs were randomly divided into a control group and four treatment groups (home bleaching, home bleaching + fluoridation, in-office bleaching, and in-office bleaching + fluoridation). A spectroradiometer (SR) and digital images (Dls) were used to evaluate colorimetric parameters (Commission Internationale l'Eclairage L*a*b*) for all specimens. Color measurements were obtained before WSL formation (T1), after WSL formation (T2), and after completion of the external tooth bleaching treatment (T3). Results: The SR-based color change after bleaching was significantly greater in the treatment groups than in the control group (p < 0.05). SR-based lightness (L*) and red-green (a*) values were significantly higher at T2 than at T1 (p < 0.001), with no significant changes in yellow-blue (b*) values. At T3, SR-based L* values had increased while a* and b* values had decreased in the treatment groups (p < 0.001). The DI-based color difference between the sound enamel and WSL areas (AE*D1) increased significantly from T1 to T2 in all groups (p < 0.001) and significantly decreased from T2 to T3 in the treatment groups (p < 0.001). No significant differences in AE*D1 at T3 were shown between the four treatment groups (p > 0.05). Conclusions: The findings of this study suggested that external tooth bleaching with fluoridation can alleviate the conspicuity of WSLs. Thu, 01 Nov 2018 00:00:00 GMT https://scholarworks.korea.ac.kr/kumedicine/handle/2020.sw.kumedicine/2956 2018-11-01T00:00:00Z https://scholarworks.korea.ac.kr/kumedicine/handle/2020.sw.kumedicine/8982 Title: The relation between idiopathic scoliosis and the frontal and lateral facial form Authors: Kim, Tae-Hwan; Kim, Joo-Hwan; Kim, Yae-Jin; Cho, Il-Sik; Lim, Yong-Kyu; Lee, Dong-Yul Abstract: Objective: The purpose of this study was to evaluate the relation between idiopathic scoliosis and facial deformity in the horizontal, vertical, and anteroposterior planes. Methods: A total of 123 female patients aged 14 years or older, who visited the Spine Clinic at the Department of Orthopedics, Korea University Guro Hospital for treatment of idiopathic scoliosis, were enrolled. Whole-spine anteroposterior and lateral radiographs were taken with the patient in a naturally erect position, and frontal and lateral cephalograms were taken in an erect position with the Frankfort horizontal line parallel to the floor. Scoliosis was classified according to the Cobb angle and Lenke classification of six curve types. Cephalometric tracing in all cases was carried out with V-Ceph 5.5 by the same orthodontist. The Kruskal-Wallis test was performed to determine whether any relation existed between each group of the idiopathic scoliosis classification and the cephalometric measurements of frontal and lateral cephalograms. Results: The measurements did not reveal any significant association between the Cobb angle and cephalometric measurements and between the curve type based on the Lenke classification and cephalometric measurements. Conclusions: Based on the results of this study, no apparent relation was observed between the severity of scoliosis and facial form variations in idiopathic scoliosis patients. Mon, 01 Sep 2014 00:00:00 GMT https://scholarworks.korea.ac.kr/kumedicine/handle/2020.sw.kumedicine/8982 2014-09-01T00:00:00Z https://scholarworks.korea.ac.kr/kumedicine/handle/2020.sw.kumedicine/30410 Title: The predictability of dentoskeletal factors for soft-tissue chin strain during lip closure Authors: Yu, Yun-Hee; Kim, Yae-Jin; Lee, Dong-Yul; Lim, Yong-Kyu Abstract: Objective: To investigate the dentoskeletal factors which may predict soft-tissue chin strain during lip closure. Methods: The pretreatment frontal and lateral facial photographs and lateral cephalograms of 209 women (aged 18-30 years) with Angle's Class I or II malocclusion were examined. The subjects were categorized by three examiners into the no-strain and strain groups according to the soft-tissue chin tension or deformation during lip closure. Relationships of the cephalometric measurements with the group classification were analyzed by logistic regression analysis, and a classification and regression tree (CART) model was used to define the predictive variables for the group classification. Results: The lower the value of the overbite depth indicator (ODI) and the higher the values of upper incisor to Nasion-Pogonion (U1-NPog, mm), overjet, and upper incisor to upper lip (U1-upper lip, mm), the more likely was the subject to be classified into the strain group. The CART showed that 1.11-NPog was the most prominent predictor of soft-tissue chin strain (cut-off value of 14.2 mm), followed by overjet. Conclusions: To minimize strain of the soft-tissue chin, orthodontic treatment should be oriented toward increasing the ODI value while decreasing the U1-NPog, overjet, and U1 upper lip values. Sun, 01 Dec 2013 00:00:00 GMT https://scholarworks.korea.ac.kr/kumedicine/handle/2020.sw.kumedicine/30410 2013-12-01T00:00:00Z