Hyung Joon Ahn

ORCID: 0000-0002-7427-0746
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About
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Research Areas
  • Renal Transplantation Outcomes and Treatments
  • Organ Transplantation Techniques and Outcomes
  • Cancer Cells and Metastasis
  • Organ Donation and Transplantation
  • Temporomandibular Joint Disorders
  • Cardiac Ischemia and Reperfusion
  • Peripheral Artery Disease Management
  • Oral and gingival health research
  • Organ and Tissue Transplantation Research
  • Parvovirus B19 Infection Studies
  • Nitric Oxide and Endothelin Effects
  • Liver physiology and pathology
  • Polyomavirus and related diseases
  • Renal and Vascular Pathologies
  • Diagnosis and Treatment of Venous Diseases
  • Vascular Procedures and Complications
  • Facial Nerve Paralysis Treatment and Research
  • Pharmacological Effects and Toxicity Studies
  • Vasculitis and related conditions
  • Transplantation: Methods and Outcomes
  • Orthodontics and Dentofacial Orthopedics
  • Osteoarthritis Treatment and Mechanisms
  • TGF-β signaling in diseases
  • Korean Peninsula Historical and Political Studies
  • Ocular Diseases and Behçet’s Syndrome

Kyung Hee University
2014-2024

Yonsei University
2005-2024

Yonsei University College of Dentistry
2023-2024

Kyung Hee University Dental Hospital
2019-2023

Kyung Hee University Medical Center
2015-2021

Severance Hospital
2006-2014

Catholic Kwandong University
2007-2008

Myongji Hospital
2007-2008

Yonsei University Dental Hospital
2007

Kyungpook National University
1992-2005

The mean platelet volume (MPV) is a laboratory marker associated with function and activity. Increased MPV in thromboembolic disease considered an important risk factor. aim of this study was to compare the MPV/platelet count (MPV/P) ratio between deep vein thrombosis (DVT) control subjects. We retrospectively reviewed medical records patients (n = 91) admitted due newly diagnosed DVT from December 2010 March 2012. group 311) underwent health screening at our Hospital. Median higher compared...

10.3109/09537104.2012.748187 article EN Platelets 2012-12-07

Oral Diseases (2012) 18 , 655–660 Objective: To compare the effects of sodium lauryl sulfate (SLS)‐free and SLS‐containing dentifrice in patient with recurrent aphthous stomatitis (RAS). Materials methods: The design this study was a double‐blind crossover trial. 90 subjects were divided into three groups: group I used SLS‐free (a commercially available dentifrice) SLS‐A (SLS‐free + 1.5% SLS), II SLS‐B dentifrice), III SLS‐B. one two assigned dentifrices for 8 weeks then other following...

10.1111/j.1601-0825.2012.01920.x article EN Oral Diseases 2012-02-22

Abstract The clinical outcomes of 2,054 renal recipients were examined retrospectively based on pre‐transplant hepatitis B surface antigen (HBsAg) status to investigate the efficacy lamivudine treatment in HBsAg positive recipients. Pre‐transplant positivity was documented 66 10‐year patient and graft survival rates Ag group significantly lower than those negative (64.4/36.6% vs. 88.2/70.5%, respectively, P < 0.0001). Since 1997, used when virus polymerase chain reaction (HBV PCR) or...

10.1002/jmv.20980 article EN Journal of Medical Virology 2007-09-13

Background. The shortage of donor organs is one the major barriers to transplantation worldwide. After success direct exchange (swap) program in Korea since 1991, we have developed a swap-around program. However, reports on long-term outcomes programs are scarce. Methods. From September 1995 2006, performed 1193 cases renal transplantation, including 398 from living-unrelated donors. donors included 129 and 269 nonexchange We compared with that program, examined merits limitations Results....

10.1097/tp.0b013e3181804a34 article EN Transplantation 2008-08-15

Intraoperative assessment of tissue perfusion is important to predict wound healing or improvement symptoms in patients with peripheral arterial disease (PAD) vascular trauma. There no widely accepted standard for intraoperative measurement perfusion. Here, we report the use indocyanine green (ICG)-based angiography determine blood flow PAD and trauma.The SPY fluorescent imaging system was utilized. A dose 3-5 mL ICG (2.5 mg/mL) injected intravenously followed by a 10 normal saline flush....

10.4174/astr.2016.90.5.279 article EN Annals of Surgical Treatment and Research 2016-01-01

Summary This study examined changes in masticatory function after botulinum toxin type A ( BTX ‐A) injection using objective and subjective tests during 12 weeks. Also, we compared differences between group which only masseter muscle (M group) was injected temporal (M‐T were injected. Forty subjects assigned into two groups; M n = 20) the M‐T 20). The Meditoxin ® used as ‐A injection. mixing ability index MAI ) indicator, visual analogue scale VAS food intake FIA indicators. Overall,...

10.1111/joor.12111 article EN Journal of Oral Rehabilitation 2013-11-08

The aim of this study was to determine the force distribution and pattern mastication after injection botulinum toxin type A (BTX-A) into both masseter muscles. hypothesis be tested that difference between right left balance occlusal diminishes over time following BTX-A injection.Fifteen patients were submitted therapy for subjective hypertrophy. total 25 U (50 in total) injected two points located 1 cm apart at center lower one-third All examined using T-Scan occlusion analysis system...

10.3349/ymj.2014.55.4.1123 article EN cc-by-nc Yonsei Medical Journal 2014-01-01

Purpose: Peripheral arterial disease (PAD) has been a major public health issue in the elderly.Advances endovascular surgery have led to substantial shift management of PAD.Although nationwide trend PAD treatment Western countries was reported, limited data available on this Korea.This study examined national Korea over past decade.Methods: Health Insurance Review and Assessment Service were used.We sought analyze trends open for Medicare beneficiaries between 2004 2013.We also analyzed each...

10.4174/astr.2015.89.6.319 article EN cc-by-nc Annals of Surgical Treatment and Research 2015-01-01

Abstract— Quantitative information, such as the initiation period, growth and coalescence behaviour, statistical distributions of crack length, density cracks, distribution patterns properties, were obtained from fatigue tests on type 304 stainless steel at 538°C in a previous study. Using this information input data condition for connection interactions simulation life prediction due to high temperature process was performed illustrated output two‐dimensional graphical display.

10.1111/j.1460-2695.1992.tb01305.x article EN Fatigue & Fracture of Engineering Materials & Structures 1992-07-01

Cytomegalovirus (CMV) is the most important opportunistic viral pathogen in solid organ transplant (SOT) recipients. The Korean guideline for prevention of CMV infection SOT recipients was developed jointly by Society Infectious Diseases and Transplantation. serostatus both donors should be screened before transplantation to best assess risk after SOT. Seronegative receiving organs from seropositive face highest risk, followed Either antiviral prophylaxis or preemptive therapy can used...

10.3947/ic.2024.0016 article EN cc-by-nc Infection and Chemotherapy 2024-01-01

The study was to investigate the changes in biochemical properties of activated mature CD8+ T cells related apoptosis at a molecular level. We confirmed activation and by fluorescence-activated cell sorting atomic force microscopy then performed Raman spectral measurements on cellular deoxyribose nucleic acid (DNA). In cells, there were increases protein spectra 1002 1234 cm−1. particular, assess apoptosis-related DNA signatures, we investigated isolated from resting cells. 765 786 cm−1 1053...

10.1117/1.jbo.20.7.075001 article EN cc-by Journal of Biomedical Optics 2015-07-02

Background Diabetes mellitus is a common and crucial metabolic complication in kidney transplantation. It necessary to analyze the course of glucose metabolism patients who already have diabetes after receiving transplant. In this study, we investigated changes transplantation, detailed analysis was performed on some whose glycemic status improved. Methods The multicenter prospective cohort study conducted between 1 April 2016 31 September 2018. Adult (aged 20 65 years) received allografts...

10.3389/fendo.2023.1197475 article EN cc-by Frontiers in Endocrinology 2023-06-21

Small-for-size syndrome (SFSS) is a major problem in liver surgery, and splenectomy has been used to prevent SFSS. However, it unknown whether the same effect on regeneration both standard marginal hepatectomy. The aim of this study see difference according amount resection.Thirty male Sprague-Dawley rats (220 260 g) were divided into following five groups: control (n = 6), 70% hepatectomy with 90% 6). animals euthanized 24 hours after surgery specimens obtained. To assess regeneration, we...

10.4174/jkss.2012.82.4.238 article EN Journal of the Korean Surgical Society 2012-01-01

Methotrexate (MTX) is a chemotherapeutic agent that used to treat host of malignancies. But recently, MTX has also been as therapeutic for chronic inflammatory disorders such rheumatoid arthritis, psoriasis, and systemic lupus erythematosus. However, an antimetabolite affects rapidly dividing normal cells oral mucosal epithelial cells, gastrointestinal bone marrow cells-which explains why mucositis often initial manifestation toxicity. Because lesions are frequently initially presented in...

10.14476/jomp.2015.40.2.82 article EN Journal of Oral Medicine and Pain 2015-06-30

Background. Serum soluble CD30 (sCD30) levels might be a useful marker of immunologic status in pre transplant (Tx) recipients. We retrospectively correlated preTx sCD30 (high versus low) on postTx graft survival, incidence acute rejection, and function using stored serum. Methods. Of 254 recipients who underwent kidney Tx, 120 were enrolled under the uniform criteria (living donor, age >25 years, viral hepatitis free, diabetes free). Results. The was not significantly associated with...

10.1097/01.tp.0000248779.17754.5e article EN Transplantation 2006-12-19
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