1.Influence of Preservation Methods on Reattached Tooth Fragments: A Study of Color Stability and Strength
Youngeun JANG ; Jaesik LEE ; Gimin KIM
Journal of Korean Academy of Pediatric Dentistry 2025;52(2):159-168
This study compared and evaluated the color change and fracture resistance of reattached tooth fragments stored in different media after trauma. Sixty extracted permanent incisors were examined. Tap water, saline solution, milk, artificial saliva, and casein phosphopeptide-amorphous calcium and phosphate (CPP-ACP) were used as storage media. The control group used no storage media. Color changes were calculated using CIE L*a*b* values measured by a spectrophotometer at seven time points: just before reproducing the tooth fracture (T0); after drying the fractured crown for 24 hours following fracture (T1); immediately after rehydration in the storage medium for 20 minutes (T2); and 12 hours (T3), 24 hours (T4), 1 week (T5), and 3 weeks (T6) after reattaching the fractured crown. Fracture resistance was uniformly measured 3 weeks after reattachment. The results showed that the CPPACP group showed significantly more effective color recovery than the other storage media groups, with the color returning to natural levels by T2. Color recovery was observed in all groups at T6. Fracture resistance did not differ significantly between the six groups. No significant difference was observed between the storage media regarding color recovery and fracture resistance three weeks after reattachment.
2.Influence of Preservation Methods on Reattached Tooth Fragments: A Study of Color Stability and Strength
Youngeun JANG ; Jaesik LEE ; Gimin KIM
Journal of Korean Academy of Pediatric Dentistry 2025;52(2):159-168
This study compared and evaluated the color change and fracture resistance of reattached tooth fragments stored in different media after trauma. Sixty extracted permanent incisors were examined. Tap water, saline solution, milk, artificial saliva, and casein phosphopeptide-amorphous calcium and phosphate (CPP-ACP) were used as storage media. The control group used no storage media. Color changes were calculated using CIE L*a*b* values measured by a spectrophotometer at seven time points: just before reproducing the tooth fracture (T0); after drying the fractured crown for 24 hours following fracture (T1); immediately after rehydration in the storage medium for 20 minutes (T2); and 12 hours (T3), 24 hours (T4), 1 week (T5), and 3 weeks (T6) after reattaching the fractured crown. Fracture resistance was uniformly measured 3 weeks after reattachment. The results showed that the CPPACP group showed significantly more effective color recovery than the other storage media groups, with the color returning to natural levels by T2. Color recovery was observed in all groups at T6. Fracture resistance did not differ significantly between the six groups. No significant difference was observed between the storage media regarding color recovery and fracture resistance three weeks after reattachment.
3.Influence of Preservation Methods on Reattached Tooth Fragments: A Study of Color Stability and Strength
Youngeun JANG ; Jaesik LEE ; Gimin KIM
Journal of Korean Academy of Pediatric Dentistry 2025;52(2):159-168
This study compared and evaluated the color change and fracture resistance of reattached tooth fragments stored in different media after trauma. Sixty extracted permanent incisors were examined. Tap water, saline solution, milk, artificial saliva, and casein phosphopeptide-amorphous calcium and phosphate (CPP-ACP) were used as storage media. The control group used no storage media. Color changes were calculated using CIE L*a*b* values measured by a spectrophotometer at seven time points: just before reproducing the tooth fracture (T0); after drying the fractured crown for 24 hours following fracture (T1); immediately after rehydration in the storage medium for 20 minutes (T2); and 12 hours (T3), 24 hours (T4), 1 week (T5), and 3 weeks (T6) after reattaching the fractured crown. Fracture resistance was uniformly measured 3 weeks after reattachment. The results showed that the CPPACP group showed significantly more effective color recovery than the other storage media groups, with the color returning to natural levels by T2. Color recovery was observed in all groups at T6. Fracture resistance did not differ significantly between the six groups. No significant difference was observed between the storage media regarding color recovery and fracture resistance three weeks after reattachment.
4.Specific nephrotoxicity and cardiotoxicity of BT-CAL(R), Sigma Anti-bonding Molecule Calcium Carbonate, in mice.
Ja Young JANG ; Jingmei CAI ; Jihyun KIM ; Jangbeen KYUNG ; Dajeong KIM ; Ehn Kyoung CHOI ; Youngeun KIM ; Kwang Sei KIM ; Dongsun PARK ; Hyun Gu KANG ; Yun Bae KIM
Laboratory Animal Research 2013;29(1):7-11
According to a high anti-osteoporotic efficacy of Sigma Anti-bonding Molecule Calcium Carbonate (SAC), repeated-dose toxicities of SAC were investigated to assess its feasibility as drug or functional food ingredient. Male ICR mice were given drinking water containing 0.006, 0.02 or 0.06% SAC for 4 weeks. SAC feeding decreased the body weights and feed and water consumptions of mice in a dose-dependent manner, especially, leading to severe emaciation and 70% death in 3 weeks in the high-dose (0.06%) group. Not only kidney and heart weights, but also the levels of blood urea nitrogen, creatinine, aspartate transaminase, and creatine phospokinase significantly increased after SAC administration, indicative of nephrotoxicity and cardiotoxicity. Such renal and cardiac toxicities were also confirmed by microscopic findings, exhibiting renal crystals and cardiac fibrosis, which may be due to the insoluble crystal formation and calcium overload, respectively. In conclusion, it is suggested that no observed adverse effect level of SAC is lower than 0.006% in mice, and that a long-term intake may cause serious adverse effects on renal and cardiac functions.
Animals
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Aspartate Aminotransferases
;
Blood Urea Nitrogen
;
Body Weight
;
Calcium
;
Calcium Carbonate
;
Creatine
;
Creatinine
;
Drinking Water
;
Emaciation
;
Fibrosis
;
Functional Food
;
Heart
;
Humans
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Kidney
;
Male
;
Mice
;
Mice, Inbred ICR
;
No-Observed-Adverse-Effect Level
;
Weights and Measures
5.An ethanolic extract of Angelica gigas improves atherosclerosis by inhibiting vascular smooth muscle cell proliferation.
Ja Young JANG ; Jihyun KIM ; Jingmei CAI ; Youngeun KIM ; Kyungha SHIN ; Tae Su KIM ; Sung Pyo LEE ; Sung Kyeong PARK ; Ehn Kyoung CHOI ; Yun Bae KIM
Laboratory Animal Research 2014;30(2):84-89
The effects of an ethanolic extract of Angelica gigas (EAG) on the vascular smooth muscle cell (VSMC) proliferation and high-cholesterol diet-induced hypercholesterolemia and atherosclerosis were investigated. Rat aortic VSMCs were stimulated with platelet-derived growth factor-BB (25 ng/mL) for the induction of DNA synthesis and cell proliferation. EAG (1-10 microg/mL) significantly inhibited both the thymidine incorporation and cell proliferation in a concentration-dependent manner. Hypercholesterolemia was induced by feeding male New Zealand white rabbits with 0.5% cholesterol in diet for 10 weeks, during which EAG (1% in diet) was given for the final 8 weeks after 2-week induction of hypercholesterolemia. Hypercholesterolemic rabbits exhibited great increases in serum total cholesterol and low-density lipoproteins (LDL) levels, and finally severe atheromatous plaque formation covering 28.4% of the arterial walls. EAG significantly increased high-density lipoproteins (HDL), slightly decreased LDL, and potentially reduced the atheroma area to 16.6%. The results indicate that EAG attenuates atherosclerosis not only by inhibiting VASC proliferation, but also by increasing blood HDL levels. Therefore, it is suggested that EAG could be an alternative or an adjunct therapy for the improvement of hypercholesterolemia and atherosclerosis.
Angelica*
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Animals
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Atherosclerosis*
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Cell Proliferation*
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Cholesterol
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Diet
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DNA
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Ethanol*
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Humans
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Hypercholesterolemia
;
Lipoproteins, HDL
;
Lipoproteins, LDL
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Male
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Muscle, Smooth, Vascular*
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Plaque, Atherosclerotic
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Rabbits
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Rats
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Thymidine
6.A Novel De Novo Pathogenic Variant in FOXF1 in a Newborn with Alveolar Capillary Dysplasia with Misalignment of Pulmonary Veins.
Youngeun MA ; Mi Ae JANG ; Hye Soo YOO ; So Yoon AHN ; Se In SUNG ; Yun Sil CHANG ; Chang Seok KI ; Won Soon PARK
Yonsei Medical Journal 2017;58(3):672-675
Alveolar capillary dysplasia with misalignment of pulmonary veins (ACD/MPV) is an autosomal dominant, fatal developmental disorder of the lungs, with a mortality rate of about 100%. ACD/MPV is caused by mutations in FOXF1. Herein, we describe a newborn boy with ACD/MPV carrying a novel pathogenic variant of FOXF1. The patient developed respiratory distress and severe pulmonary hypertension on the first day of life. Despite aggressive cardiorespiratory management, including veno-venous extracorporeal membrane oxygenation, his condition deteriorated rapidly, and he died within the first month of his life. Lung histology showed the characteristic features of ACD/MPV at autopsy. Sequence analysis of FOXF1 from genomic DNA obtained from autopsied lung tissue revealed that the patient was heterozygous for a novel missense variant (c.305T>C; p.Leu102Pro). Further analysis of both parents confirmed the de novo occurrence of the variant. To the best of our knowledge, this is the first report of genetically confirmed ACD/MPV in Korea.
Autopsy
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DNA
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Extracorporeal Membrane Oxygenation
;
Female
;
Humans
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Hypertension, Pulmonary
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Infant, Newborn*
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Korea
;
Lung
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Male
;
Mortality
;
Parents
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Persistent Fetal Circulation Syndrome*
;
Sequence Analysis
7.Aberrant Forms of Escherichia coli in Urine Culture.
Youngeun MA ; Jang Ho LEE ; Seung Tae LEE ; Chang Seok KI ; Nam Yong LEE
Korean Journal of Clinical Microbiology 2010;13(3):128-131
Bacterial morphology can be altered by various factors, including antibiotics. Unusually shaped, large, swollen organisms were observed in a urine culture obtained from a patient who had no history of antibiotic therapy. The organism was identified as Escherichia coli by the Vitek 2 system and by DNA sequencing of 16S rRNA and gyrB. The patient had no symptoms except fever, which subsided without medication. Microbiology laboratories should be aware of the potential appearance of such bacilli to avoid confusion with fungi and other naturally occurring filamentous organisms.
Anti-Bacterial Agents
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Atypical Bacterial Forms
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Escherichia
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Escherichia coli
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Fever
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Fungi
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Humans
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Sequence Analysis, DNA
8.Withdrawal: Specific nephrotoxicity and cardiotoxicity of BT-CAL®, Sigma Anti-bonding Molecule Calcium Carbonate, in mice.
Ja Young JANG ; Jingmei CAI ; Jihyun KIM ; Jangbeen KYUNG ; Dajeong KIM ; Ehn Kyoung CHOI ; Youngeun KIM ; Kwang Sei KIM ; Dongsun PARK ; Hyun Gu KANG ; Yun Bae KIM
Laboratory Animal Research 2016;32(2):134-134
This article has been retracted.
9.Novel Asian-Specific Visceral Adiposity Indices Are Associated with Chronic Kidney Disease in Korean Adults
Jonghwa JIN ; Hyein WOO ; Youngeun JANG ; Won-Ki LEE ; Jung-Guk KIM ; In-Kyu LEE ; Keun-Gyu PARK ; Yeon-Kyung CHOI
Diabetes & Metabolism Journal 2023;47(3):426-436
Background:
The Chinese visceral adiposity index (CVAI) and new visceral adiposity index (NVAI) are novel indices of visceral adiposity used to predict metabolic and cardiovascular diseases in Asian populations. However, the relationships of CVAI and NVAI with chronic kidney disease (CKD) have not been investigated. We aimed to characterize the relationships of CVAI and NVAI with the prevalence of CKD in Korean adults.
Methods:
A total of 14,068 participants in the 7th Korea National Health and Nutrition Examination Survey (6,182 men and 7,886 women) were included. Receiver operating characteristic (ROC) analyses were employed to compare the associations between indices of adiposity and CKD, and a logistic regression model was used to characterize the relationships of CVAI and NVAI with CKD prevalence.
Results:
The areas under the ROC curves for CVAI and NVAI were significantly larger than for the other indices, including the visceral adiposity index and lipid accumulation product, in both men and women (all P<0.001). In addition, high CVAI or NVAI was significantly associated with a high CKD prevalence in both men (odds ratio [OR], 2.14; 95% confidence interval [CI], 1.31 to 3.48 in CVAI and OR, 6.47; 95% CI, 2.91 to 14.38 in NVAI, P<0.05) and women (OR, 4.87; 95% CI, 1.85 to 12.79 in CVAI and OR, 3.03; 95% CI, 1.35 to 6.82 in NVAI, P<0.05); this association remained significant after adjustment for multiple confounding factors in men and women.
Conclusion
CVAI and NVAI are positively associated with CKD prevalence in a Korean population. CVAI and NVAI may be useful for the identification of CKD in Asian populations, including in Korea.
10.Effects of a low-FODMAP enteral formula on diarrhea on patients in the intensive care unit
Eunjoo BAE ; Jiyoon KIM ; Jinyoung JANG ; Junghyun KIM ; Suyeon KIM ; Youngeun CHANG ; MI YEON KIM ; Mira JEON ; Seongsuk KANG ; Jung Keun LEE ; Tae Gon KIM
Nutrition Research and Practice 2021;15(6):703-714
BACKGROUND/OBJECTIVES:
A dietary restriction on the intake of fermentable oligosaccharides, disaccharides, monosaccharides, and polyols (FODMAPs) has been reported to be effective in the treatment of gastrointestinal (GI) tract complications. Enteral nutrition (EN) is widely used for patients who cannot obtain their nutritional requirements orally, but many studies have reported EN complications, especially diarrhea, in up to 50% of patients.
SUBJECTS/METHODS:
We performed a single-center, non-randomized, controlled trial to determine the effects of a low-FODMAP enteral formula on GI complications in patients in intensive care units (ICUs). Patients in the ICU who needed EN (n = 66) were alternately assigned to the low-FODMAP group (n = 33) or the high-FODMAP group (n = 33).
RESULTS:
Anthropometric and biochemical parameters were measured, and stool assessment was performed using King's Stool Chart. We excluded patients who received laxatives, GI motility agents, proton pump inhibitors, antifungal agents, and antibiotics other than β-lactams. There were no differences in GI symptoms during 7 days of intervention, including bowel sound, abdominal distension, and vomiting between the 2 groups. However, diarrhea was more frequent in the high-FODMAP group (7/33 patients) than the lowFODMAP group (1/33 patients) (P = 0.044).
CONCLUSIONS
Our results suggest that a low-FODMAP enteral formula may be a practical therapeutic approach for patients who exhibit enteral formula complications. Our study warrants further randomized clinical trials and multicenter trials.