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Lee DW, Lee HS, Kim SG, Kim KJ, Jung SJ. The rocky road to freedom: number of countries transited during defection and risk of metabolic syndrome among North Korean Refugees in South Korea. Public Health 2023; 221:208-215. [PMID: 37490839 DOI: 10.1016/j.puhe.2023.06.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 05/22/2023] [Accepted: 06/15/2023] [Indexed: 07/27/2023]
Abstract
OBJECTIVES North Korean Refugees (NKRs) undergo defection, and this has been shown to impact their current health status in South Korea. However, little is understood about how the defection process is related to metabolic syndrome (MetS). This study regarded the defection process to be a quasi-measurement of traumatic experience and investigated whether defection was a risk factor for MetS among NKRs living in South Korea. STUDY DESIGN This cross-sectional study obtained data from the Korea University Anam Hospital in Seoul. NKRs (N = 847) voluntarily completed questionnaires and underwent at least one medical examination between October 2008 and July 2021. METHODS Multivariable logistic regression models were used to evaluate whether the number of countries transited by NKRs was associated with MetS by controlling for covariates. RESULTS The prevalence of MetS among male and female NKRs in South Korea was 12.3% and 13.3%, respectively. The highest prevalence of MetS (33.4%) was among NKRs who had transited two countries. The number of months in transit countries (mean: 49.9 ± 51.7) and period of residence in South Korea (mean: 40.9 ± 40.9 months) were also considered. NKRs who transited three countries had a higher probability of MetS (odds ratio [OR] 2.660, 95% confidence interval [CI] 1.161-6.097) than those who travelled directly to South Korea. NKRs who transited three countries and had only resided in South Korea for a short period had a higher probability of MetS (OR 3.424, 95% CI 1.149-10.208) than those who have lived in South Korea for a longer period. CONCLUSIONS Considering the social vulnerability of NKRs and consequential health problems, there is an urgent need for appropriate support from the government and society.
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Affiliation(s)
- D W Lee
- Department of Preventive Medicine, Yonsei University College of Medicine, Seoul, 03722, Republic of Korea; Institute of Health Services Research, Yonsei University, Seoul, 03722, Republic of Korea
| | - H S Lee
- Research Investment for Global Health Technology Fund Foundation, Seoul, 03145, Republic of Korea
| | - S G Kim
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Korea University College of Medicine, Seoul, 02841, Republic of Korea; Department of Healthcare and Medicine for Unified Korea, Korea University College of Medicine, Seoul, 02842, Republic of Korea
| | - K J Kim
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Korea University College of Medicine, Seoul, 02841, Republic of Korea.
| | - S J Jung
- Department of Preventive Medicine, Yonsei University College of Medicine, Seoul, 03722, Republic of Korea; Department of Public Health, Graduate School, Yonsei University, Seoul, 03722, Republic of Korea; Center for Global Health, Massachusetts General Hospital, Boston, MA, 02114, USA; Harvard Center for Population and Developmental Studies, Cambridge, MA, 02138, USA.
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2
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Cha SM, Shin HD, Kim YK, Kim SG. Finger injuries by eyebrow razor blades in infants. Hand Surg Rehabil 2023; 42:80-85. [PMID: 36336263 DOI: 10.1016/j.hansur.2022.10.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 10/04/2022] [Accepted: 10/07/2022] [Indexed: 11/06/2022]
Abstract
Infants are occasionally injured while playing with their mother's eyebrow razor, and we have treated several infants with flexor tendon injuries, which in some cases were accompanied by damage to the corresponding digital nerves and/or vessels. Here, we report the outcomes in a retrospective case series, with a review of literature. Between January 2013 and October 2019, 8 patients who met our inclusion criteria were initially investigated. The inclusion criteria were: (1) injured by an eyebrow razor during fiddling or grasping, and (2) the availability of complete medical records and radiological data, with follow-up of at least 2 years. The core sutures were performed using a modified Becker (4-strand) method for flexor digitorum profundus (FDP). Nerves and/or vessels were repaired under microscopy. A long-arm mitten cast was then applied, with the fingers slightly flexed in a resting position, for 3 weeks. Then, the children were allowed to return to unrestricted activity. Formal outpatient hand therapy was not performed. Mean postnatal age was 6.3 months. The FDP was injured in zones 1 and 2 in 3 and 5 infants, respectively. Most of the infants were injured near a dressing table, in the bedroom used by their mother. The colors of these razors were all bright, except for one achromatic (white) razor. All of the razors had been left uncovered, without their cap, or were left open in the case of hinged razors. At a mean follow-up of 35.8 months, range of motion was evaluated by the Strickland and modified Strickland methods; all results were "excellent". We encountered no significant complications in any digit: neuroma, tendon retear, stiffness or necrosis. Uncapped or unfolded colorful eyebrow razors pose a high risk of tendon section with concurrent neurovascular injury in infants. Although satisfactory outcomes can be expected, it seems important to prevent the injury through fastidious parental care and changing razor design and color. LEVEL OF EVIDENCE: Level IV, retrospective case series.
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Affiliation(s)
- S M Cha
- Department of Orthopedic Surgery, Regional Rheumatoid and Degenerative Arthritis Center, Chungnam National University Hospital, Chungnam National University School of Medicine, 266 Munwha-ro, Jung-Gu, 35015 Daejeon, Republic of Korea
| | - H D Shin
- Department of Orthopedic Surgery, Regional Rheumatoid and Degenerative Arthritis Center, Chungnam National University Hospital, Chungnam National University School of Medicine, 266 Munwha-ro, Jung-Gu, 35015 Daejeon, Republic of Korea.
| | - Y K Kim
- Department of Orthopedic Surgery, Regional Rheumatoid and Degenerative Arthritis Center, Chungnam National University Hospital, Chungnam National University School of Medicine, 266 Munwha-ro, Jung-Gu, 35015 Daejeon, Republic of Korea
| | - S G Kim
- Department of Orthopedic Surgery, Regional Rheumatoid and Degenerative Arthritis Center, Chungnam National University Hospital, Chungnam National University School of Medicine, 266 Munwha-ro, Jung-Gu, 35015 Daejeon, Republic of Korea
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3
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Ledbetter EC, Kim SG, Schaefer DM, Liotta JL, Bowman DD, Lejeune M. Detection of free-living amoebae in domestic cats with and without naturally-acquired keratitis. Vet J 2021; 274:105712. [PMID: 34182073 DOI: 10.1016/j.tvjl.2021.105712] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 06/21/2021] [Accepted: 06/22/2021] [Indexed: 10/21/2022]
Abstract
Pathogenic free-living amoebae, most notably Acanthamoeba spp., are important pathogens of the human cornea. The importance of infection with free-living amoebae in cats with keratitis is currently unclear. The aim of this study was to determine the frequency of amoeba detection in corneas of cats with naturally-acquired keratitis and in the ocular surface microflora of cats without ocular disease. Clinical ophthalmic and in vivo corneal confocal microscopic examinations were performed on 60 cats with keratitis. Corneal scrapings were analyzed by amoeba culture; cytological evaluation; and Acanthamoeba, Hartmannella, and Vahlkampfia PCR assays. Following ophthalmic examination, conjunctival specimens collected from 60 cats without clinically apparent ocular disease were analyzed similarly. In one cat with ulcerative keratitis, amoeba cysts and trophozoites were detected by in vivo corneal confocal microscopy; an Acanthamoeba sp. was isolated from corneal specimens and detected by Acanthamoeba PCR assay; and suppurative corneal inflammation was present cytologically. An Acanthamoeba sp. was isolated from conjunctival specimens from one cat without clinically apparent ocular disease, but with suppurative inflammation demonstrated cytologically. Both Acanthamoeba isolates belonged to the T4 genotype. Naegleria-like amoebae were isolated in samples from two cats with keratitis and seven cats without clinical ocular disease, but amoebae were not detected by the other assays in these samples. Amoeba detection by culture was significantly (P = 0.01) associated with cytologically diagnosed corneoconjunctival inflammation. This study identified naturally-acquired Acanthamoeba keratitis in cats. Detection of Naegleria-like amoebae in samples from cats with and without keratitis is of uncertain pathological significance.
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Affiliation(s)
- E C Ledbetter
- Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA.
| | - S G Kim
- Department of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA
| | - D M Schaefer
- Department of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA
| | - J L Liotta
- Department of Microbiology and Immunology, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA
| | - D D Bowman
- Department of Microbiology and Immunology, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA
| | - M Lejeune
- Department of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA
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4
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Kwon W, Kim H, Han Y, Hwang YJ, Kim SG, Kwon HJ, Vinuela E, Járufe N, Roa JC, Han IW, Heo JS, Choi SH, Choi DW, Ahn KS, Kang KJ, Lee W, Jeong CY, Hong SC, Troncoso AT, Losada HM, Han SS, Park SJ, Kim SW, Yanagimoto H, Endo I, Kubota K, Wakai T, Ajiki T, Adsay NV, Jang JY. Role of tumour location and surgical extent on prognosis in T2 gallbladder cancer: an international multicentre study. Br J Surg 2020; 107:1334-1343. [PMID: 32452559 DOI: 10.1002/bjs.11618] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2019] [Revised: 02/29/2020] [Accepted: 03/16/2020] [Indexed: 12/13/2022]
Abstract
BACKGROUND In gallbladder cancer, stage T2 is subdivided by tumour location into lesions on the peritoneal side (T2a) or hepatic side (T2b). For tumours on the peritoneal side (T2a), it has been suggested that liver resection may be omitted without compromising the prognosis. However, data to validate this argument are lacking. This study aimed to investigate the prognostic value of tumour location in T2 gallbladder cancer, and to clarify the adequate extent of surgical resection. METHODS Clinical data from patients who underwent surgery for gallbladder cancer were collected from 14 hospitals in Korea, Japan, Chile and the USA. Survival and risk factor analyses were conducted. RESULTS Data from 937 patients were available for evaluation. The overall 5-year disease-free survival rate was 70·6 per cent, 74·5 per cent for those with T2a and 65·5 per cent among those with T2b tumours (P = 0·028). Regarding liver resection, extended cholecystectomy was associated with a better 5-year disease-free survival rate than simple cholecystectomy (73·0 versus 61·5 per cent; P = 0·012). The 5-year disease-free survival rate was marginally better for extended than simple cholecystectomy in both T2a (76·5 versus 66·1 per cent; P = 0·094) and T2b (68·2 versus 56·2 per cent; P = 0·084) disease. Five-year disease-free survival rates were similar for extended cholecystectomies including liver wedge resection versus segment IVb/V segmentectomy (74·1 versus 71·5 per cent; P = 0·720). In multivariable analysis, independent risk factors for recurrence were presence of symptoms (hazard ratio (HR) 1·52; P = 0·002), R1 resection (HR 1·96; P = 0·004) and N1/N2 status (N1: HR 3·40, P < 0·001; N2: HR 9·56, P < 0·001). Among recurrences, 70·8 per cent were metastatic. CONCLUSION Tumour location was not an independent prognostic factor in T2 gallbladder cancer. Extended cholecystectomy was marginally superior to simple cholecystectomy. A radical operation should include liver resection and adequate node dissection.
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Affiliation(s)
- W Kwon
- Department of Surgery and Cancer Research Institute, Seoul National University College of Medicine, Seoul, South Korea
| | - H Kim
- Department of Surgery and Cancer Research Institute, Seoul National University College of Medicine, Seoul, South Korea
| | - Y Han
- Department of Surgery and Cancer Research Institute, Seoul National University College of Medicine, Seoul, South Korea
| | - Y J Hwang
- School of Medicine, Kyungpook National University, Daegu, South Korea.,Kyungpook National University Chilgok Hospital, Daegu, South Korea
| | - S G Kim
- School of Medicine, Kyungpook National University, Daegu, South Korea.,Kyungpook National University Chilgok Hospital, Daegu, South Korea
| | - H J Kwon
- School of Medicine, Kyungpook National University, Daegu, South Korea.,Kyungpook National University Chilgok Hospital, Daegu, South Korea
| | - E Vinuela
- Department of Digestive Surgery, Santiago, Chile
| | - N Járufe
- Department of Digestive Surgery, Santiago, Chile
| | - J C Roa
- Pathology, Faculty of Medicine, Catholic University of Chile, Santiago, Chile
| | - I W Han
- Department of Surgery, Samsung Medical Centre, Sungkyunkwan University College of Medicine, Seoul, South Korea
| | - J S Heo
- Department of Surgery, Samsung Medical Centre, Sungkyunkwan University College of Medicine, Seoul, South Korea
| | - S-H Choi
- Department of Surgery, Samsung Medical Centre, Sungkyunkwan University College of Medicine, Seoul, South Korea
| | - D W Choi
- Department of Surgery, Samsung Medical Centre, Sungkyunkwan University College of Medicine, Seoul, South Korea
| | - K S Ahn
- Division of Hepatobiliary and Pancreatic Surgery, Department of Surgery, Keimyung University Dongsan Medical Centre, Daegu, South Korea
| | - K J Kang
- Division of Hepatobiliary and Pancreatic Surgery, Department of Surgery, Keimyung University Dongsan Medical Centre, Daegu, South Korea
| | - W Lee
- Department of Surgery, Gyeongsang National University College of Medicine, Jinju, South Korea
| | - C-Y Jeong
- Department of Surgery, Gyeongsang National University College of Medicine, Jinju, South Korea
| | - S-C Hong
- Department of Surgery, Gyeongsang National University College of Medicine, Jinju, South Korea
| | - A T Troncoso
- Department of Surgery, Universidad de la Frontera, Temuco, Chile
| | - H M Losada
- Department of Surgery, Universidad de la Frontera, Temuco, Chile
| | - S-S Han
- Department of Surgery, Centre for Liver Cancer, National Cancer Centre, Goyang, South Korea
| | - S-J Park
- Department of Surgery, Centre for Liver Cancer, National Cancer Centre, Goyang, South Korea
| | - S-W Kim
- Department of Surgery, Centre for Liver Cancer, National Cancer Centre, Goyang, South Korea
| | - H Yanagimoto
- Department of Surgery, Kansai Medical University, Hirakata, Japan
| | - I Endo
- Department of Gastroenterological Surgery, Graduate School of Medicine, Yokohama City University, Yokohama, Japan
| | - K Kubota
- Department of Gastroenterological Surgery, Dokkyo Medical University, Tochigi, Japan
| | - T Wakai
- Division of Digestive and General Surgery, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - T Ajiki
- Division of Hepato-Biliary-Pancreatic Surgery, Department of Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - N V Adsay
- Department of Pathology, Koc University, Istanbul, Turkey.,Department of Pathology, Emory University School of Medicine, Atlanta, Georgia, USA
| | - J-Y Jang
- Department of Surgery and Cancer Research Institute, Seoul National University College of Medicine, Seoul, South Korea
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5
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Cho IA, Kim TH, Lim H, Park JH, Kang KR, Lee SY, Kim CS, Kim DK, Kim HJ, Yu SK, Kim SG, Kim JS. Formononetin Antagonizes the Interleukin-1β-Induced Catabolic Effects Through Suppressing Inflammation in Primary Rat Chondrocytes. Inflammation 2020; 42:1426-1440. [PMID: 30937838 DOI: 10.1007/s10753-019-01005-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
In the present study, we demonstrated the anti-catabolic effects of formononetin, a phytoestrogen derived from herbal plants, against interleukin-1β (IL-1β)-induced severe catabolic effects in primary rat chondrocytes and articular cartilage. Formononetin did not affect the viability of primary rat chondrocytes in both short- (24 h) and long-term (21 days) treatment periods. Furthermore, formononetin effectively antagonized the IL-1β-induced catabolic effects including the decrease in proteoglycan content, suppression of pericellular matrix formation, and loss of proteoglycan through the decreased expression of cartilage-degrading enzymes like matrix metalloproteinase (MMP)-13, MMP-1, and MMP-3 in primary rat chondrocytes. Moreover, catabolic oxidative stress mediators like nitric oxide, inducible nitric oxide synthase, cyclooxygenase-2, and prostaglandin E2 were significantly downregulated by formononetin in primary rat chondrocytes treated with IL-1β. Sequentially, the upregulation of pro-inflammatory cytokines (like IL-1α, IL-1β, IL-6, and tumor necrosis factor α), chemokines (like fractalkine, monocyte chemoattractant protein-1, and macrophage inflammatory protein-3α), and vascular endothelial growth factor were significantly downregulated by formononetin in primary rat chondrocytes treated with IL-1β. These data suggest that formononetin may suppress IL-1β-induced severe catabolic effects and osteoarthritic condition. Furthermore, formononetin may be a promising candidate for the treatment and prevention of osteoarthritis.
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Affiliation(s)
- In-A Cho
- Oral Biology Research Institute, School of Dentistry, Chosun University, 309 Philmun-daero, Dong-gu, Gwangju, 61452, Republic of Korea
| | - Tae-Hyeon Kim
- Oral Biology Research Institute, School of Dentistry, Chosun University, 309 Philmun-daero, Dong-gu, Gwangju, 61452, Republic of Korea
| | - HyangI Lim
- Oral Biology Research Institute, School of Dentistry, Chosun University, 309 Philmun-daero, Dong-gu, Gwangju, 61452, Republic of Korea
| | - Jong-Hyun Park
- Oral Biology Research Institute, School of Dentistry, Chosun University, 309 Philmun-daero, Dong-gu, Gwangju, 61452, Republic of Korea
| | - Kyeong-Rok Kang
- Oral Biology Research Institute, School of Dentistry, Chosun University, 309 Philmun-daero, Dong-gu, Gwangju, 61452, Republic of Korea
| | - Sook-Young Lee
- Oral Biology Research Institute, School of Dentistry, Chosun University, 309 Philmun-daero, Dong-gu, Gwangju, 61452, Republic of Korea.,Marine Bio Research Center, Chosun University, Wando-gun, 59146, Jeollanam-do, Republic of Korea
| | - Chun Sung Kim
- Oral Biology Research Institute, School of Dentistry, Chosun University, 309 Philmun-daero, Dong-gu, Gwangju, 61452, Republic of Korea.,Marine Bio Research Center, Chosun University, Wando-gun, 59146, Jeollanam-do, Republic of Korea
| | - Do Kyung Kim
- Oral Biology Research Institute, School of Dentistry, Chosun University, 309 Philmun-daero, Dong-gu, Gwangju, 61452, Republic of Korea
| | - Heung-Joong Kim
- Oral Biology Research Institute, School of Dentistry, Chosun University, 309 Philmun-daero, Dong-gu, Gwangju, 61452, Republic of Korea
| | - Sun-Kyoung Yu
- Oral Biology Research Institute, School of Dentistry, Chosun University, 309 Philmun-daero, Dong-gu, Gwangju, 61452, Republic of Korea
| | - Su-Gwan Kim
- Oral Biology Research Institute, School of Dentistry, Chosun University, 309 Philmun-daero, Dong-gu, Gwangju, 61452, Republic of Korea
| | - Jae-Sung Kim
- Oral Biology Research Institute, School of Dentistry, Chosun University, 309 Philmun-daero, Dong-gu, Gwangju, 61452, Republic of Korea.
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6
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Oh JS, Kim TH, Park JH, Lim H, Cho IA, You JS, Lee GJ, Seo YS, Kim DK, Kim CS, Yu SK, Kim HJ, Kim SG, Kim JS. Formononetin induces apoptotic cell death through the suppression of mitogen‑activated protein kinase and nuclear factor‑κB phosphorylation in FaDu human head and neck squamous cell carcinoma cells. Oncol Rep 2020; 43:700-710. [PMID: 31894318 DOI: 10.3892/or.2019.7432] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Accepted: 10/25/2019] [Indexed: 11/06/2022] Open
Abstract
Formononetin, a phytoestrogen extracted from various herbal plants, has been investigated as an anticancer agent against diverse types of cancer. The aim of the present study was to investigate the induction of apoptotic cell death by formononetin in the FaDu pharyngeal squamous cell carcinoma cell line. Formononetin significantly increased FaDu cell death, with an estimated IC50 value of 50 µM; however, it did not affect the viability of normal L929 mouse fibroblasts used as normal control at 5‑25 µM. Typical characteristics of apoptosis, such as morphological alterations, chromatin condensation, DNA fragmentation and the size of the apoptotic cell population, were increased in FaDu cells treated with formononetin for 24 h. Furthermore, formononetin‑induced FaDu cell death involved the death receptor‑mediated extrinsic and the mitochondria‑dependent intrinsic apoptotic pathways by activating the caspase cascade. The chemotherapeutic effects of formononetin were mediated by the suppression of mitogen‑activated protein kinases, including extracellular signal‑regulated kinase 1/2 and p38, and nuclear factor‑κB phosphorylation in FaDu cells. Finally, the oral administration of formononetin decelerated tumor growth through the expression of cleaved caspase‑3 in a FaDu cell xenograft animal model. Taken together, these findings indicate that formononetin holds promise as a chemotherapeutic agent and may be of value in the treatment of human head and neck squamous cell carcinoma.
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Affiliation(s)
- Ji-Su Oh
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Dong‑gu, Gwang‑Ju 61452, Republic of Korea
| | - Tae-Hyeon Kim
- The Institute of Dental Science, School of Dentistry, Chosun University, Dong‑gu, Gwang‑Ju 61452, Republic of Korea
| | - Jong-Hyun Park
- The Institute of Dental Science, School of Dentistry, Chosun University, Dong‑gu, Gwang‑Ju 61452, Republic of Korea
| | - Hyangi Lim
- The Institute of Dental Science, School of Dentistry, Chosun University, Dong‑gu, Gwang‑Ju 61452, Republic of Korea
| | - In-A Cho
- The Institute of Dental Science, School of Dentistry, Chosun University, Dong‑gu, Gwang‑Ju 61452, Republic of Korea
| | - Jae-Seek You
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Dong‑gu, Gwang‑Ju 61452, Republic of Korea
| | - Gyeong-Je Lee
- Department of Prosthodontics, School of Dentistry, Chosun University, Dong‑gu, Gwang‑Ju 61452, Republic of Korea
| | - Yo-Seob Seo
- Department of Oral and Maxillofacial Radiology, School of Dentistry, Chosun University, Dong‑gu, Gwang‑Ju 61452, Republic of Korea
| | - Do Kyung Kim
- The Institute of Dental Science, School of Dentistry, Chosun University, Dong‑gu, Gwang‑Ju 61452, Republic of Korea
| | - Chun Sung Kim
- The Institute of Dental Science, School of Dentistry, Chosun University, Dong‑gu, Gwang‑Ju 61452, Republic of Korea
| | - Sun-Kyoung Yu
- The Institute of Dental Science, School of Dentistry, Chosun University, Dong‑gu, Gwang‑Ju 61452, Republic of Korea
| | - Heung-Joong Kim
- The Institute of Dental Science, School of Dentistry, Chosun University, Dong‑gu, Gwang‑Ju 61452, Republic of Korea
| | - Su-Gwan Kim
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Dong‑gu, Gwang‑Ju 61452, Republic of Korea
| | - Jae-Sung Kim
- The Institute of Dental Science, School of Dentistry, Chosun University, Dong‑gu, Gwang‑Ju 61452, Republic of Korea
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7
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Seo YS, Kim TH, Lim H, Oh JS, You JS, Lee GJ, Yu SK, Kim DOK, Kim HJ, Kim CS, Lee SY, Kim SG, Kim JS. Phenformin Induces Caspase-dependent Apoptosis of FaDu Head and Neck Squamous Cell Carcinoma Cells. Anticancer Res 2019; 39:3499-3506. [PMID: 31262874 DOI: 10.21873/anticanres.13496] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 06/02/2019] [Accepted: 06/04/2019] [Indexed: 11/10/2022]
Abstract
BACKGROUND/AIM The present study aimed to investigate the apoptotic effects of phenformin, a therapeutic agent for diabetes, on head and neck squamous cell carcinoma (HNSCC). MATERIALS AND METHODS Cytotoxicity was measured by the MTT and live/dead cell assay. Phenformin-induced apoptotic FaDu cell death and its associated cellular signaling pathways were investigated by hematoxylin and eosin staining, 4',6-diamidino-2-phenylindole staining, caspase-3 activity assay, fluorescence-activated cell sorting analysis, and western blotting. RESULTS Phenformin promoted death of and apoptotic processes in FaDu cells, including morphological alterations and nuclear condensation. Furthermore, treatment with phenformin increased caspase-3 activity and apoptotic populations via the caspase cascade through cleavage of capspase-8, -9, and -3 and poly(ADP-ribose) polymerase in FaDu cells. Moreover, phosphorylation levels of mitogen-activated protein kinases, nuclear factor-κB, and AKT were down-regulated in FaDu cells by phenformin. CONCLUSION Phenformin induced death of FaDu cells via caspase-dependent extrinsic and intrinsic apoptosis pathways and is a promising novel therapeutic agent for HNSCC.
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Affiliation(s)
- Yo-Seob Seo
- Department of Oral and Maxillofacial Radiology, Chosun University, Gwang-Ju, Republic of Korea
| | - Tae-Hyeon Kim
- Oral Biology Research Institute, Chosun University, Gwang-Ju, Republic of Korea
| | - Hyangi Lim
- Oral Biology Research Institute, Chosun University, Gwang-Ju, Republic of Korea
| | - Ji-Su Oh
- Department of Oral and Maxillofacial Surgery, Chosun University, Gwang-Ju, Republic of Korea
| | - Jae-Seek You
- Department of Oral and Maxillofacial Surgery, Chosun University, Gwang-Ju, Republic of Korea
| | - Gyeong-Je Lee
- Department of Prosthodontics, School of Dentistry, Chosun University, Gwang-Ju, Republic of Korea
| | - Sun-Kyoung Yu
- Oral Biology Research Institute, Chosun University, Gwang-Ju, Republic of Korea
| | - DO Kyung Kim
- Oral Biology Research Institute, Chosun University, Gwang-Ju, Republic of Korea
| | - Heung-Joong Kim
- Oral Biology Research Institute, Chosun University, Gwang-Ju, Republic of Korea
| | - Chun Sung Kim
- Oral Biology Research Institute, Chosun University, Gwang-Ju, Republic of Korea
| | - Sook-Young Lee
- Marine Bio Research Center, Chosun University, Wando-gun, Republic of Korea
| | - Su-Gwan Kim
- Department of Oral and Maxillofacial Surgery, Chosun University, Gwang-Ju, Republic of Korea
| | - Jae-Sung Kim
- Oral Biology Research Institute, Chosun University, Gwang-Ju, Republic of Korea
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8
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Lee GJ, Cho IA, Oh JS, Seo YS, You JS, Kim SG, Kim JS. Anticatabolic Effects of Morin through the Counteraction of Interleukin-1β-Induced Inflammation in Rat Primary Chondrocytes. Cells Tissues Organs 2019; 207:21-33. [PMID: 31256148 DOI: 10.1159/000500323] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Accepted: 04/12/2019] [Indexed: 11/19/2022] Open
Abstract
Morin, a flavonoid isolated from various medicinal herbal plants, has an anti-inflammatory effect. This study aimed to elucidate the anticatabolic effects and cellular mechanism of morin against interleukin-1β (IL-1β) in rat primary chondrocytes. Morin at 10-100 μM did not affect the viability of rat primary chondrocytes. Treatment with morin for 21 days ameliorated the IL-1β-induced decrease in extracellular matrix. Furthermore, treatment with morin attenuated IL-1β-induced proteoglycan loss in the articular cartilage through suppression of catabolic factors, such as matrix metalloproteinases, inflammatory mediators, and pro-inflammatory cytokines. These data indicated that morin exerted anticatabolic effects that can prevent and reduce progressive degeneration of the articular cartilage, and thus may be a potential candidate treatment for osteoarthritis.
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Affiliation(s)
- Gyeong-Je Lee
- Department of Prosthodontics, School of Dentistry, Chosun University, Gwangju, Republic of Korea
| | - In-A Cho
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Republic of Korea
| | - Ji-Su Oh
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Republic of Korea
| | - Yo-Seob Seo
- Department of Oral and Maxillofacial Radiology, School of Dentistry, Chosun University, Gwangju, Republic of Korea
| | - Jae-Seek You
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Republic of Korea
| | - Su-Gwan Kim
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Republic of Korea
| | - Jae-Sung Kim
- Pre-Dentistry, School of Dentistry, Chosun University, Gwangju, Republic of Korea,
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9
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Ahn HK, Lee H, Kim SG, Hyun SH. Pre-treatment 18F-FDG PET-based radiomics predict survival in resected non-small cell lung cancer. Clin Radiol 2019; 74:467-473. [PMID: 30898382 DOI: 10.1016/j.crad.2019.02.008] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Accepted: 02/12/2019] [Indexed: 12/28/2022]
Abstract
AIM To assess the prognostic value of 2-[18F]-fluoro-2-deoxy-d-glucose (FDG) positron-emission tomography (PET)-based radiomics using a machine learning approach in patients with non-small cell lung cancer (NSCLC). MATERIALS AND METHODS Ninety-three patients with stage I-III NSCLC who underwent combined PET/computed tomography (CT) followed by curative resection. A total of 35 unique quantitative radiomic features was extracted from the PET images, which included imaging phenotypes such as pixel intensity, shape, and texture. Radiomic features were ranked based on score according to their correlation with disease recurrence status within a 3-year follow-up. The recurrence risk classification performances of machine learning algorithms (random forest, neural network, naive Bayes, logistic regression, and support vector machine) using the 20 best-ranked features were compared using the areas under the receiver operating characteristic curve (AUC) and validated by the random sampling method. RESULTS Contrast and busyness texture features from neighbourhood grey-level difference matrix were found to be the two best predictors of disease recurrence. The random forest model obtained the best performance (AUC: 0.956, accuracy: 0.901, F1 score: 0.872, precision: 0.905, recall: 0.842), followed by the neural network model (AUC: 0.871, accuracy: 0.780, F1 score: 0.708, precision: 0.755, recall: 0.666). CONCLUSION A PET-based radiomic model was developed and validated for risk classification in NSCLC. The machine learning approach with random forest classifier exhibited good performance in predicting the recurrence risk. Radiomic features may help clinicians to improve the risk stratification for clinical practice.
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Affiliation(s)
- H K Ahn
- Division of Hematology and Oncology, Department of Internal Medicine, Gachon University Gil Medical Center, Incheon, Republic of Korea
| | - H Lee
- Department of Nuclear Medicine, Gachon University Gil Medical Center, Incheon, Republic of Korea
| | - S G Kim
- Department of Nuclear Medicine, Gachon University Gil Medical Center, Incheon, Republic of Korea
| | - S H Hyun
- Department of Nuclear Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
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10
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Oh JS, Seo YS, Lee GJ, You JS, Kim SG. A Comparative Study with Biphasic Calcium Phosphate to Deproteinized Bovine Bone in Maxillary Sinus Augmentation: A Prospective Randomized and Controlled Clinical Trial. Int J Oral Maxillofac Implants 2018; 34:233–242. [PMID: 30521656 DOI: 10.11607/jomi.7116] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
PURPOSE The purpose of this study was to evaluate a new graft material, biphasic calcium phosphate, composed of 60% hydroxyapatite and 40% β-Tricalcium phosphate and deproteinized bovine bone mineral, which is established as a predictable graft material for maxillary sinus augmentation. MATERIALS AND METHODS Maxillary sinus augmentation was performed with different bone materials. Bone biopsies were performed on tissue harvested from the future implant bed using a trephine bur at 6 months after maxillary sinus augmentation. Resonance frequency analysis was performed immediately and at 6 months after the implant placement. Microcomputed tomography and histomorphometric analysis were performed in all patients. RESULTS Fifty-six patients (60 sinuses) were included in the study. At 6 months postoperative, 31 biopsies were performed on tissues harvested from the calcium phosphate, and 29 biopsies on tissues from the bovine bone grafts. There was no implant failure during the 21-month mean follow-up period. The overall implant stability quotient values were higher than 60, and gradually increased for 6 months. Higher new bone volume fraction and new bone surface density were observed in the calcium phosphate group compared with the bovine bone group. In contrast, residual bone graft volume in the bovine bone group was higher than that in the calcium phosphate group. Nevertheless, there was no significant difference between groups in the microcomputed tomography and histomorphometric parameters. CONCLUSION Within the study's limitations, both graft materials demonstrated similar biocompatibility and osteoconductivity in the maxillary sinus augmentation.
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11
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Oh JS, You JS, Kim SG. Clinical and histomorphometric evaluation of decompression followed by enucleation in the treatment of odontogenic keratocyst. J Dent Sci 2018; 13:329-333. [PMID: 30895141 PMCID: PMC6388872 DOI: 10.1016/j.jds.2018.06.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 03/12/2018] [Indexed: 12/15/2022] Open
Abstract
Background/purpose The classification and treatment of odontogenic keratocyst (OKC) are controversial. The objective of this study was to present the efficiency of decompression followed by enucleation by clinical and histomorphometric evaluation for the treatment of OKC. Materials and methods Thirty four OKCs of 27 patients who underwent decompression followed by enucleation were included in this study. Clinical and histomorphometric analysis were performed. Results The average decreasing rate was 59% in maximum diameter, 66% in the amount of the volume for the average of period of the decompression was 9.8 months. The mean of increasing rate of the thickness of the epithelial lining was 921.16%. There were no recurrences for a mean follow-up period of 5.8 years. The thin and friable cyst wall of the OKC was changed to thickened, hard type. Conclusion The decompression was found to be effective and reliable as a treatment of the OKC to decrease the recurrence tendency, even for Gorlin-Goltz syndrome.
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Affiliation(s)
- Ji-Su Oh
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Republic of Korea
| | - Jae-Seek You
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Republic of Korea
| | - Su-Gwan Kim
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Republic of Korea
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12
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Kim SG, Malek M, Sigurdsson A, Lin LM, Kahler B. Regenerative endodontics: a comprehensive review. Int Endod J 2018; 51:1367-1388. [PMID: 29777616 DOI: 10.1111/iej.12954] [Citation(s) in RCA: 190] [Impact Index Per Article: 31.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Accepted: 05/14/2018] [Indexed: 12/13/2022]
Abstract
The European Society of Endodontology and the American Association for Endodontists have released position statements and clinical considerations for regenerative endodontics. There is increasing literature on this field since the initial reports of Iwaya et al. (Dental Traumatology, 17, 2001, 185) and Banchs & Trope (Journal of Endodontics, 30, 2004, 196). Endogenous stem cells from an induced periapical bleeding and scaffolds using blood clot, platelet rich plasma or platelet-rich fibrin have been utilized in regenerative endodontics. This approach has been described as a 'paradigm shift' and considered the first treatment option for immature teeth with pulp necrosis. There are three treatment outcomes of regenerative endodontics; (i) resolution of clinical signs and symptoms; (ii) further root maturation; and (iii) return of neurogenesis. It is known that results are variable for these objectives, and true regeneration of the pulp/dentine complex is not achieved. Repair derived primarily from the periodontal and osseous tissues has been shown histologically. It is hoped that with the concept of tissue engineering, namely stem cells, scaffolds and signalling molecules, that true pulp regeneration is an achievable goal. This review discusses current knowledge as well as future directions for regenerative endodontics. Patient-centred outcomes such as tooth discolouration and possibly more appointments with the potential for adverse effects needs to be discussed with patients and parents. Based on the classification of Cvek (Endodontics and Dental Traumatology, 8, 1992, 45), it is proposed that regenerative endodontics should be considered for teeth with incomplete root formation although teeth with near or complete root formation may be more suited for conventional endodontic therapy or MTA barrier techniques. However, much is still not known about clinical and biological aspects of regenerative endodontics.
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Affiliation(s)
- S G Kim
- Division of Endodontics, Columbia University College of Dental Medicine, New York, NY, USA
| | - M Malek
- Department of Endodontics, New York University College of Dentistry, New York, NY, USA
| | - A Sigurdsson
- Department of Endodontics, New York University College of Dentistry, New York, NY, USA
| | - L M Lin
- Department of Endodontics, New York University College of Dentistry, New York, NY, USA
| | - B Kahler
- The University of Queensland School of Dentistry, Brisbane, Australia
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Kim NH, Choi J, Kim NH, Choi KM, Baik SH, Lee J, Kim SG. Dipeptidyl peptidase-4 inhibitor use and risk of diabetic retinopathy: A population-based study. Diabetes Metab 2018; 44:361-367. [PMID: 29752167 DOI: 10.1016/j.diabet.2018.03.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2017] [Revised: 03/09/2018] [Accepted: 03/11/2018] [Indexed: 10/17/2022]
Abstract
AIMS This study examined whether dipeptidyl peptidase (DPP)-4 inhibitor use is beneficial or harmful to diabetic retinopathy (DR) compared with other glucose-lowering agents in patients with type 2 diabetes (T2D). METHODS From a population-based cohort provided by the National Health Insurance Service in Korea, 67,743 adults with T2D were identified as having been treated with oral glucose-lowering agents between 2008 and 2013. Matching (1:1) was performed for two groups comparing ever-use (cases) and never-use (controls) of DPP-4 inhibitors (n=14,522 in each group). Cox regression analyses were used to assess risk of the following DR events: vitreous haemorrhage; vitrectomy or photocoagulation; intravitreal agent use; and blindness. RESULTS During a median follow-up of 28.4 (14.0-45.2) months, there were 305 (in controls) and 342 (in cases) composite DR events. DPP-4 inhibitor ever-use was not associated with overall risk of composite DR events [adjusted hazard ratio (HR): 1.08, 95% CI: 0.93-1.26] compared with never-use, nor was the risk of each DR outcome increased with DPP-4 inhibitor therapy either. However, DPP-4 inhibitor administration for<12 months was associated with a greater risk of composite DR events (adjusted HR: 1.31, 95% CI: 1.09-1.57) compared with other glucose-lowering agents over the same treatment period. CONCLUSION In comparison to other oral glucose-lowering agents, DPP-4 inhibitor treatment did not increase overall risk of DR. However, DPP-4 inhibitors may be associated with an increased risk of retinopathy events early in the treatment phase.
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Affiliation(s)
- N H Kim
- Division of endocrinology and metabolism, Department of internal medicine, Korea University Anam Hospital, Korea University College of Medicine, 126-1, Anam-dong 5-ga, Seongbuk-gu, 02841 Seoul, Korea
| | - J Choi
- Department of biostatistics, Korea University College of Medicine, Seoul, Korea
| | - N H Kim
- Division of endocrinology and metabolism, Department of internal medicine, Korea University Anam Hospital, Korea University College of Medicine, 126-1, Anam-dong 5-ga, Seongbuk-gu, 02841 Seoul, Korea
| | - K M Choi
- Division of endocrinology and metabolism, Department of internal medicine, Korea University Anam Hospital, Korea University College of Medicine, 126-1, Anam-dong 5-ga, Seongbuk-gu, 02841 Seoul, Korea
| | - S H Baik
- Division of endocrinology and metabolism, Department of internal medicine, Korea University Anam Hospital, Korea University College of Medicine, 126-1, Anam-dong 5-ga, Seongbuk-gu, 02841 Seoul, Korea
| | - J Lee
- Department of biostatistics, Korea University College of Medicine, Seoul, Korea
| | - S G Kim
- Division of endocrinology and metabolism, Department of internal medicine, Korea University Anam Hospital, Korea University College of Medicine, 126-1, Anam-dong 5-ga, Seongbuk-gu, 02841 Seoul, Korea.
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Kim SY, Kim YK, Kim HS, Yun PY, Kim SG, Choi YH. Extraction socket sealing using palatal gingival grafts and resorbable collagen membranes. Maxillofac Plast Reconstr Surg 2017; 39:39. [PMID: 29302588 PMCID: PMC5742316 DOI: 10.1186/s40902-017-0137-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Accepted: 11/15/2017] [Indexed: 11/10/2022] Open
Abstract
Background Socket sealing surgery is performed for the preservation of the form and volume of the soft tissue by covering the resulting socket with autogenous soft tissue graft or membrane barriers. This procedure is usually necessary to improve the esthetic results of the maxillary anterior or premolar areas. Methods This study retrospectively investigated cases involving the open membrane technique or socket sealing surgery with a palatal gingival graft or collagen membrane where implant placement and bone grafting were performed immediately after tooth extraction. From January 2005 to December 2008, socket sealing surgery was performed in 24 patients, and 25 implants were placed. Results All implants were successful in the follow-up period. In the palatal gingival graft group, the mean marginal bone loss was 1.17 mm during the mean follow-up period of 81.0 months. In the collagen membrane group, the mean marginal bone loss was 1.23 mm during the mean follow-up period of 76.9 months. There was no significant difference between the two groups. Conclusions Consequently, socket sealing surgery is effective at minimizing the loss of soft tissue and alveolar bone. Electronic supplementary material The online version of this article (10.1186/s40902-017-0137-x) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Sang-Yun Kim
- Department of Oral and Maxillofacial Surgery, Section of Dentistry, Seoul National University Bundang Hospital, 300 Gumi-dong, Bundang-gu, Seongnam, Gyeonggi-do South Korea
| | - Young-Kyun Kim
- Department of Oral and Maxillofacial Surgery, Section of Dentistry, Seoul National University Bundang Hospital, 300 Gumi-dong, Bundang-gu, Seongnam, Gyeonggi-do South Korea.,Department of Dentistry & Dental Research Institute, School of Dentistry, Seoul National University, Seoul, South Korea
| | - Hyun-Suk Kim
- Department of Oral and Maxillofacial Surgery, Section of Dentistry, Seoul National University Bundang Hospital, 300 Gumi-dong, Bundang-gu, Seongnam, Gyeonggi-do South Korea
| | - Pil-Young Yun
- Department of Oral and Maxillofacial Surgery, Section of Dentistry, Seoul National University Bundang Hospital, 300 Gumi-dong, Bundang-gu, Seongnam, Gyeonggi-do South Korea
| | - Su-Gwan Kim
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, South Korea
| | - Yong-Hun Choi
- Department of Conservative Dentistry, Seoul National University Bundang Hospital, Seongnam, South Korea
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15
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Kim SW, Jun JW, Giri SS, Chi C, Yun S, Kim HJ, Kim SG, Kang JW, Park SC. First report of carp oedema virus infection of koi (Cyprinus carpio haematopterus) in the Republic of Korea. Transbound Emerg Dis 2017; 65:315-320. [PMID: 29226602 DOI: 10.1111/tbed.12782] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Indexed: 11/29/2022]
Abstract
Twenty-five koi (Cyprinus carpio haematopterus) bought from a wholesale fish market in Korea, showed lethargic behaviour and 100% mortality within 20 days. Carp oedema virus (CEV) was detected by PCR in all 25 koi. Results of detailed histopathological and clinical examinations of 17 koi indicated loss of body balance, severe infiltration of inflammatory cells into the inter-lamellar spaces of the gills and vacuolization and inclusion bodies in gill epithelial cells. Sequence analysis of PCR products of these koi showed up to 99% identity to the previously reported sequences, suggesting that the observed mass mortality resulted from koi sleepy disease (KSD) due to CEV infection. To the best of our knowledge, this study is the first report of KSD in the Republic of Korea. Partial sequences of 4a protein from the virus indicated that the present CEV detected in koi from Korea is more closely related to that from the UK and Poland than from Japan. The present findings indicate that the prevalence and spread of KSD must be closely monitored in both European and Asian countries to avoid potential economic losses to the global koi industry.
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Affiliation(s)
- S W Kim
- Laboratory of Aquatic Biomedicine, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
| | - J W Jun
- Laboratory of Aquatic Biomedicine, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
| | - S S Giri
- Laboratory of Aquatic Biomedicine, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
| | - C Chi
- Laboratory of Aquatic Biomedicine, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
| | - S Yun
- Laboratory of Aquatic Biomedicine, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
| | - H J Kim
- Laboratory of Aquatic Biomedicine, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
| | - S G Kim
- Laboratory of Aquatic Biomedicine, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
| | - J W Kang
- Laboratory of Aquatic Biomedicine, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
| | - S C Park
- Laboratory of Aquatic Biomedicine, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
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Oh JS, Kim SG. Collagen sponge and rhBMP-2 improve socket healing in rats treated with zoledronic acid. Braz Oral Res 2017; 31:e99. [PMID: 29236901 DOI: 10.1590/1807-3107bor-2017.vol31.0099] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Accepted: 10/10/2017] [Indexed: 02/07/2023] Open
Abstract
The aim of the present study was to evaluate the possible use of a commercial absorbed collagen sponge and bone morphogenetic protein (BMP) for the prevention of bisphosphonate-related osteonecrosis of the jaw (BRONJ) in rats. Twenty rats received intraperitoneal injections of 0.1-mg/kg of zoledronic acid three times a week for eight weeks before the extraction of both maxillary first molars after eight weeks. A collagen sponge (experimental group 1) and a collagen sponge with recombinant human BMP-2 (experimental group 2) were applied to the right extraction sockets of ten rats each. The 20 left extraction sockets (control groups 1 and 2) were left unprotected. After eight weeks, all rats were euthanized. Macroscopic analysis, micro-computed tomography (CT) analysis, and histological analysis were performed. There was a significant difference in the bone density between the control and experimental groups on micro-CT analysis. Impaired healing of the extraction sockets, indicating BRONJ, was observed in 80% of control group 1, 90% of control group 2, 30% of experimental group 1, and 20% of experimental group 2. The collagen sponge with/without BMP used for protecting the extraction socket had the potential for a positive effect in reducing the incidence of bisphosphonate-related osteonecrosis of the jaw in rats.
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Affiliation(s)
- Ji-Su Oh
- Chosun University, School of Dentistry, Department of Oral and Maxillofacial Surgery, 375, SeoSukDong, DongGu, Gwangju 501-759, Republic of Korea
| | - Su-Gwan Kim
- Chosun University, School of Dentistry, Department of Oral and Maxillofacial Surgery, 375, SeoSukDong, DongGu, Gwangju 501-759, Republic of Korea
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Jung MJ, Kim HK, Choi SY, Kim SG, Jin SY. Solid pseudopapillary neoplasm of the pancreas with liver metastasis initially misinterpreted as benign haemorrhagic cyst. Malays J Pathol 2017; 39:327-330. [PMID: 29279599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Solid pseudopapillary neoplasm (SPN) of the pancreas is considered a low-malignant neoplasm with a good prognosis. However, 5% to 15% of patients with SPNs develop metastatic disease, most commonly in the liver. Metastatic hepatic malignancies that show pseudocystic features are rare. Here we describe the case of a middle-aged female with a cystic liver metastasis from SPN. To the best of our knowledge, SPN with a single cystic liver metastasis has not been described, although these tumours frequently undergo haemorrhagic-cystic degeneration. Thus, in these patients the marked cystic change could be misinterpreted as a benign lesion.
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Affiliation(s)
- M J Jung
- Soonchunhyang University College of Medicine, Department of Pathology, Soonchunhyang University Bucheon Hospital, Bucheon, Republic of Korea.
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Abstract
PURPOSE This study evaluated the effect of drilling speed on early bone healing in the mandible of dogs. MATERIAL AND METHODS Six dogs were selected, and mandibular premolars and molars were extracted. After 2 months, 3 hydroxyapatite-surfaced fixtures were implanted with drilling speeds of 50, 800, and 1200 rpm on the right side first and then on the left side after 2 weeks. Implant stability quotient (ISQ) was measured on insertion, after 2 and 4 weeks. RESULTS Based on the ISQ measurement, the 1200-rpm group showed a higher value than the 50-rpm group at 2 weeks and 4 weeks (P < 0.05). New bone formation around the implant was highest for the 800-rpm group at 2 weeks and the 1200-rpm group at 4 weeks. The bone-implant contact of the superior half of the alveolar bone was highest for the 800-rpm group at 2 weeks and the 1200-rpm group at 4 weeks. There was no statistically significant difference. CONCLUSION This study suggests that 50, 800, and 1200 rpm are drilling speeds which can expect favorable outcome, yet, higher drilling speed presented overall the best biological responses.
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Affiliation(s)
- Dong-Uk Seo
- Graduate Student, Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Korea
| | - Su-Gwan Kim
- Professor, Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Republic of Korea
| | - Ji-Su Oh
- Associate Professor, Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Korea
| | - Sung-Chul Lim
- Professor, Department of Pathology, School of Medicine, Chosun University, Gwangju, Korea
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Chawla S, Loevner LA, Kim SG, Hwang WT, Wang S, Verma G, Mohan S, LiVolsi V, Quon H, Poptani H. Dynamic Contrast-Enhanced MRI-Derived Intracellular Water Lifetime (τ i ): A Prognostic Marker for Patients with Head and Neck Squamous Cell Carcinomas. AJNR Am J Neuroradiol 2017; 39:138-144. [PMID: 29146716 DOI: 10.3174/ajnr.a5440] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Accepted: 09/04/2017] [Indexed: 12/29/2022]
Abstract
BACKGROUND AND PURPOSE Shutter-speed model analysis of dynamic contrast-enhanced MR imaging allows estimation of mean intracellular water molecule lifetime (a measure of cellular energy metabolism) and volume transfer constant (a measure of hemodynamics). The purpose of this study was to investigate the prognostic utility of pretreatment mean intracellular water molecule lifetime and volume transfer constant in predicting overall survival in patients with squamous cell carcinomas of the head and neck and to stratify p16-positive patients based upon survival outcome. MATERIALS AND METHODS A cohort of 60 patients underwent dynamic contrast-enhanced MR imaging before treatment. Median, mean intracellular water molecule lifetime and volume transfer constant values from metastatic nodes were computed from each patient. Kaplan-Meier analyses were performed to associate mean intracellular water molecule lifetime and volume transfer constant and their combination with overall survival for the first 2 years, 5 years, and beyond (median duration, >7 years). RESULTS By the last date of observation, 18 patients had died, and median follow-up for surviving patients (n = 42) was 8.32 years. Patients with high mean intracellular water molecule lifetime (4 deaths) had significantly (P = .01) prolonged overall survival by 5 years compared with those with low mean intracellular water molecule lifetime (13 deaths). Similarly, patients with high mean intracellular water molecule lifetime (4 deaths) had significantly (P = .006) longer overall survival at long-term duration than those with low mean intracellular water molecule lifetime (14 deaths). However, volume transfer constant was a significant predictor for only the 5-year follow-up period. There was some evidence (P < .10) to suggest that mean intracellular water molecule lifetime and volume transfer constant were associated with overall survival for the first 2 years. Patients with high mean intracellular water molecule lifetime and high volume transfer constant were associated with significantly (P < .01) longer overall survival compared with other groups for all follow-up periods. In addition, p16-positive patients with high mean intracellular water molecule lifetime and high volume transfer constant demonstrated a trend toward the longest overall survival. CONCLUSIONS A combined analysis of mean intracellular water molecule lifetime and volume transfer constant provided the best model to predict overall survival in patients with squamous cell carcinomas of the head and neck.
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Affiliation(s)
- S Chawla
- From the Departments of Radiology (S.C., L.A.L., S.G.K., S.W., G.V., S.M., H.P.)
| | - L A Loevner
- From the Departments of Radiology (S.C., L.A.L., S.G.K., S.W., G.V., S.M., H.P.)
| | - S G Kim
- From the Departments of Radiology (S.C., L.A.L., S.G.K., S.W., G.V., S.M., H.P.).,Department of Radiology (S.G.K.), New York University, New York, New York
| | - W-T Hwang
- Biostatistics and Epidemiology (W.-T.H.)
| | - S Wang
- From the Departments of Radiology (S.C., L.A.L., S.G.K., S.W., G.V., S.M., H.P.)
| | - G Verma
- From the Departments of Radiology (S.C., L.A.L., S.G.K., S.W., G.V., S.M., H.P.)
| | - S Mohan
- From the Departments of Radiology (S.C., L.A.L., S.G.K., S.W., G.V., S.M., H.P.)
| | - V LiVolsi
- Pathology and Lab Medicine (V.L.), Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - H Quon
- Radiation Oncology (H.Q.).,Department of Radiation Oncology and Molecular Radiation Sciences (H.Q.), Johns Hopkins University, Baltimore, Maryland
| | - H Poptani
- From the Departments of Radiology (S.C., L.A.L., S.G.K., S.W., G.V., S.M., H.P.) .,Department of Cellular and Molecular Physiology (H.P.), University of Liverpool, Liverpool, United Kingdom
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Moon SM, Lee SA, Han SH, Park BR, Choi MS, Kim JS, Kim SG, Kim HJ, Chun HS, Kim DK, Kim CS. Aqueous extract of Codium fragile alleviates osteoarthritis through the MAPK/NF-κB pathways in IL-1β-induced rat primary chondrocytes and a rat osteoarthritis model. Biomed Pharmacother 2017; 97:264-270. [PMID: 29091874 DOI: 10.1016/j.biopha.2017.10.130] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 10/12/2017] [Accepted: 10/23/2017] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Codium fragile (Suringar) Hariot has been used as a potential remedy in traditional medicine because of its anti-inflammatory and anti-oxidant effects. Osteoarthritis is a chronic progressive joint disease, characterized by complex mechanisms related to inflammation and degeneration of articular cartilage. In this study, we aimed to evaluate the cartilage protective effect of an aqueous extract of Codium fragile (AECF) using rat primary chondrocytes and the osteoarthritis animal model induced by destabilization of the medial meniscus (DMM). METHODS In vitro, rat primary cultured chondrocytes were pre-treated with AECF (0.5, 1, and 2mg/mL) for 1h and then incubated with interleukin-1β (10ng/mL) for 24h. Nitrite production was detected by the Griess reagent. Alteration of the protein levels of iNOS, MMP-13, ADAMTS-4, ADAMTS-5, mitogen-activated protein kinases (MAPKs), and nuclear factor-κB (NF-κB) was detected by western blotting. In vivo, osteoarthritis was induced by DMM of Sprague Dawley (SD) rats. The rats subjected to destabilization of the medial meniscus (DMM) surgery were orally administered with AECF (50, 100, and 200mg/kg bodyweight) or distilled water for 8w. The severity of cartilage lesions was evaluated by safranin O staining and the Osteoarthritis Research Society International (OARSI) score. RESULTS These results demonstrated that AECF significantly inhibited nitrite production and inhibited the levels of iNOS, MMP-13, ADAMTS-4, and ADAMTS-5 in interleukin-1β-induced rat primary cultured chondrocytes. Moreover, AECF suppressed interleukin-1β-induced NF-κB activation in the nucleus and phosphorylation of ERK1/2 and JNK in the cytosol. In vivo, the cartilage lesions in AECF-treated osteoarthritis rats exhibited less proteoglycan loss and lower OARSI scores. CONCLUSIONS These results suggested that AECF is a potential therapeutic agent for the alleviation of osteoarthritis progression.
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Affiliation(s)
- Sung-Min Moon
- Oral Biology Research Institute, College of Dentistry, Chosun University, 375 Seosuk-dong, Dong-gu, Gwangju, 501-759, Republic of Korea; CStech Research Institute, 38 Chumdanventuresoro, Gwangju 61007, Republic of Korea
| | - Seul Ah Lee
- Department of Oral Biochemistry, College of Dentistry, Chosun University, 375 Seosuk-dong, Dong-gu, Gwangju, 501-759, Republic of Korea
| | - Seul Hee Han
- CStech Research Institute, 38 Chumdanventuresoro, Gwangju 61007, Republic of Korea
| | - Bo-Ram Park
- Department of Dental Hygiene, Chodang University, Muan-ro, Muan-eup, Muan 534-701, Republic of Korea
| | - Mi Suk Choi
- Department of Dental Hygiene, Chodang University, Muan-ro, Muan-eup, Muan 534-701, Republic of Korea
| | - Jae-Sung Kim
- Oral Biology Research Institute, College of Dentistry, Chosun University, 375 Seosuk-dong, Dong-gu, Gwangju, 501-759, Republic of Korea
| | - Su-Gwan Kim
- Oral Biology Research Institute, College of Dentistry, Chosun University, 375 Seosuk-dong, Dong-gu, Gwangju, 501-759, Republic of Korea
| | - Heung-Joong Kim
- Oral Biology Research Institute, College of Dentistry, Chosun University, 375 Seosuk-dong, Dong-gu, Gwangju, 501-759, Republic of Korea
| | - Hong Sung Chun
- Department of Biomedical Science, Chosun University, 375 Seosuk-dong, Dong-gu, Gwangju, 501-759, Republic of Korea
| | - Do Kyung Kim
- Oral Biology Research Institute, College of Dentistry, Chosun University, 375 Seosuk-dong, Dong-gu, Gwangju, 501-759, Republic of Korea
| | - Chun Sung Kim
- Oral Biology Research Institute, College of Dentistry, Chosun University, 375 Seosuk-dong, Dong-gu, Gwangju, 501-759, Republic of Korea; Department of Oral Biochemistry, College of Dentistry, Chosun University, 375 Seosuk-dong, Dong-gu, Gwangju, 501-759, Republic of Korea.
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You JS, Kim SG, Oh JS, Choi HI, Jih MK. Removal of a fractured needle during inferior alveolar nerve block: two case reports. J Dent Anesth Pain Med 2017; 17:225-229. [PMID: 29090254 PMCID: PMC5647823 DOI: 10.17245/jdapm.2017.17.3.225] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 09/07/2017] [Accepted: 09/07/2017] [Indexed: 11/23/2022] Open
Abstract
The inferior alveolar nerve block is the most common method of local anesthesia for intraoral surgery at the posterior mandibular region. However, unexpected complications may occur when administering the local anesthesia. One of these uncommon complications is the fracture of the needle. If the injection needle is broken during the surgery, it should be removed immediately. However, this is one of the most difficult procedures. In this report, we present two cases of needle fracture during the procedure, and its successful removal under general/local anesthesia administration.
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Affiliation(s)
- Jae-Seek You
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwang-ju, Korea
| | - Su-Gwan Kim
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwang-ju, Korea
| | - Ji-Su Oh
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwang-ju, Korea
| | - Hae-In Choi
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwang-ju, Korea
| | - Myeong-Kwan Jih
- Department of Pediatric Dentistry, School of Dentistry, Chosun University, Gwang-ju, Korea
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Min HG, Kim SG, Oh JS, You JS, Lim SC, Jeong MA. Comparative Study on Osseointegration of Implants After Flap and Flapless Surgery in the Mandible of Dogs. IMPLANT DENT 2017; 26:730-734. [PMID: 28846560 DOI: 10.1097/id.0000000000000648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
PURPOSE The objective of this study was to compare the implant stability and osseointegration of implants using a flap or flapless technique. MATERIAL AND METHODS Mandibular premolars and molars were extracted from both sides in 6 dogs. After 8 weeks, 4 fixtures were implanted using either a flap or flapless technique. Implant stability quotient was measured on insertion and at 2, 4, and 8 weeks later. The animals were killed while the tissues were histologically analyzed. RESULTS Implant stability increased for 8 weeks, and no statistically significant differences were observed between the surgical protocols. Bone-implant contact showed 60.27% ± 30.99% for flapless surgery and 59.73% ± 17.12% for flap surgery. And the results of new bone formation area from total area showed 56.07% ± 27.78% for flapless surgery and 57.00% ± 14.66% for flap surgery. There were no statistically significant differences. CONCLUSION This study showed no significant difference in implant stability as well as osseointegration regardless of flap or flapless technique.
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Affiliation(s)
- Hong-Gi Min
- *Resident, Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Republic of Korea. †Professor, Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Republic of Korea. ‡Associate Professor, Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Republic of Korea. §Assistant Professor, Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Republic of Korea. ¶Professor, Department of Pathology, School of Medicine, Chosun University, Gwangju, Republic of Korea. ‖Professor, Department of Dental Hygiene, Kangwon National University, Samcheok, Republic of Korea
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Cho IA, You SJ, Kang KR, Kim SG, Oh JS, You JS, Lee GJ, Seo YS, Kim DK, Kim CS, Lee SY, Kim JS. Biochanin-A induces apoptosis and suppresses migration in FaDu human pharynx squamous carcinoma cells. Oncol Rep 2017; 38:2985-2992. [DOI: 10.3892/or.2017.5953] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Accepted: 08/31/2017] [Indexed: 11/05/2022] Open
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An JH, Kim HY, Kim SG, Dralle H, Randolph GW, Piantanida E, Tanda ML, Dionigi G. Endpoints for screening thyroid cancer in the Republic of Korea: thyroid specialists' perspectives. J Endocrinol Invest 2017; 40:683-685. [PMID: 28008561 DOI: 10.1007/s40618-016-0596-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Accepted: 12/05/2016] [Indexed: 01/02/2023]
Abstract
Cancer screening is aimed primarily at reducing deaths from the specific cancer. Thyroid-specific cancer mortality may be the most ambitious endpoint for obtaining estimates of screening effect. Numerous observations have accumulated over the years, indicating that thyroid cancer mortality endpoint has been difficult to study and is confounded by population heterogeneity, provision of randomization, and requirement of large cohorts with sufficiently long follow-up due to the excellent prognosis of the cancer. Accordingly, it may be important to reconsider how to best measure thyroid cancer screening efficacy. Recommendations against thyroid cancer screening should be based upon trials designed to evaluate its effectiveness not only in significant reduction in cancer mortality, but also of other distinct endpoints. It is desirable to evaluate derivative endpoints that can reliably predict reductions in mortality. The term "derivative" means a variable that is related to the true endpoint and is likely to be observable before the primary endpoint. Derivative endpoints may include thyroid cancer incidence, the proportion of early-stage tumors detected, more treatable stage, the identification of small tumors (to maintain in observation), decrease in the number of people who develop metastatic disease, the increased chance of lesser extent surgery, and the application of minimally invasive approaches, as well as no need for lifelong thyroid replacement therapy, a consistent follow-up, low-dose or no RAI administration and risk factor assessments where case findings should be continuous. The Korean guidelines for thyroid cancer national-level screening were published by a relevant group of multidisciplinary thyroid experts. It was concluded that the evidence is insufficient to balance the benefits and harms of thyroid cancer screening. However, the paper seems to raise the necessary investments in future research and demand a complete analysis for derivative endpoints, and offer screening participants with complete information necessary to make decisions that will provide them with the most value when a small thyroid cancer is screen-identified.
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Affiliation(s)
- J H An
- Division of Endocrinology, Department of Internal Medicine, KUMC Thyroid Center, Korea University College of Medicine, Seoul, Korea
| | - H Y Kim
- Department of Surgery, KUMC Thyroid Center, Korea University College of Medicine, Seoul, Korea.
| | - S G Kim
- Division of Endocrinology, Department of Internal Medicine, KUMC Thyroid Center, Korea University College of Medicine, Seoul, Korea.
| | - H Dralle
- Section of Endocrine Surgery, Department of General, Visceraland Vascular Surgery, University Hospital Essen, Essen, Germany
| | - G W Randolph
- Division of Thyroid and Parathyroid Surgery, Harvard Medical School, Boston, MA, USA
| | - E Piantanida
- Division of Endocrinology, Department of Clinical and Experimental Medicine, University of Insubria, Varese, Italy
| | - M L Tanda
- Division of Endocrinology, Department of Clinical and Experimental Medicine, University of Insubria, Varese, Italy
| | - G Dionigi
- 1st Division of General Surgery, Department of Surgical Sciences and Human Morphology, Research Center for Endocrine Surgery, University of Insubria (Varese-Como), via Guicciardini 9, 21100, Varese, Italy
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Yu SJ, Cho IA, Kang KR, Jung YR, Cho SS, Yoon G, Oh JS, You JS, Seo YS, Lee GJ, Lee SY, Kim DK, Kim CS, Kim SG, Jeong MA, Kim JS. Licochalcone-E induces caspase-dependent death of human pharyngeal squamous carcinoma cells through the extrinsic and intrinsic apoptotic signaling pathways. Oncol Lett 2017; 13:3662-3668. [PMID: 28521469 PMCID: PMC5431251 DOI: 10.3892/ol.2017.5865] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Accepted: 02/03/2017] [Indexed: 01/18/2023] Open
Abstract
The aim of the present study was to investigate licochalcone-E (Lico-E)-induced apoptosis and the associated apoptotic signaling pathway in FaDu cells, a human pharyngeal squamous carcinoma cell line. Treatment with Lico-E exhibited significant cytotoxicity on FaDu cells in a concentration-dependent manner. The IC50 value of Lico-E in FaDu cells was ~50 µM. Treatment with Lico-E increased the number of dead FaDu cells. Furthermore, chromatin condensation, which is associated with apoptotic cell death, was observed in FaDu cells treated with Lico-E for 24 h. By contrast, Lico-E did not produce cytotoxicity or increase the number of dead cells when applied to human normal oral keratinocytes (hNOKs). Furthermore, chromatin condensation was not observed in hNOKs treated with Lico-E. Treatment with Lico-E increased the expression of Fas ligand and the cleaved form of caspase-8 in FaDu cells. Furthermore, treatment with Lico-E increased the expression of pro-apoptotic factors, including apoptosis regulator BAX, Bcl-2-associated agonist of cell death, apoptotic protease-activating factor 1, caspase-9 and tumor suppressor p53, while decreasing the expression of anti-apoptotic factors, including apoptosis regulator Bcl-2 and Bcl-2-like protein 1 in FaDu cells. The expression of cleaved caspases-3 and poly (ADP-ribose) polymerase was significantly upregulated following treatment with Lico-E in FaDu cells, while Lico-E-induced apoptotic FaDu cell death was partially suppressed by treatment with Z-VAD-FMK, a pan caspase inhibitor. Therefore, Lico-E-induced oral cancer (OC) cell-specific apoptosis is mediated by the death receptor-dependent extrinsic and mitochondrial-dependent intrinsic apoptotic signaling pathways. In conclusion, these data suggested that Lico-E exhibits potential chemopreventive effects and warrants further developed as a chemotherapeutic agent against OC.
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Affiliation(s)
- Sang-Joun Yu
- Department of Periodontology, School of Dentistry, Chosun University, Gwangju 501-759, Republic of Korea
| | - In-A Cho
- Department of Biodental Engineering, Graduate School, Chosun University, Gwangju 501-759, Republic of Korea
| | - Kyeong-Rok Kang
- Department of Biodental Engineering, Graduate School, Chosun University, Gwangju 501-759, Republic of Korea
| | - Yi-Ra Jung
- Regional Innovation Center for Dental Science and Engineering, Chosun University, Gwangju 501-759, Republic of Korea
| | - Seung Sik Cho
- Department of Pharmacy, College of Pharmacy, Mokpo National University, Mokpo, Jeollanamdo 353-729, Republic of Korea
| | - Goo Yoon
- Department of Pharmacy, College of Pharmacy, Mokpo National University, Mokpo, Jeollanamdo 353-729, Republic of Korea
| | - Ji-Su Oh
- Department of Oral and Maxillofacial Surgery, Chosun University, Gwangju 501-759, Republic of Korea
| | - Jae-Seek You
- Department of Oral and Maxillofacial Surgery, Chosun University, Gwangju 501-759, Republic of Korea
| | - Yo-Seob Seo
- Department of Oral and Maxillofacial Radiology, Chosun University, Gwangju 501-759, Republic of Korea
| | - Gyeong-Je Lee
- Department of Prosthodontics, Chosun University, Gwangju 501-759, Republic of Korea
| | - Sook-Young Lee
- Regional Innovation Center for Dental Science and Engineering, Chosun University, Gwangju 501-759, Republic of Korea
| | - Do Kyung Kim
- Oral Biology Research Institute, Chosun University, Gwangju 501-759, Republic of Korea
| | - Chun Sung Kim
- Oral Biology Research Institute, Chosun University, Gwangju 501-759, Republic of Korea
| | - Su-Gwan Kim
- Regional Innovation Center for Dental Science and Engineering, Chosun University, Gwangju 501-759, Republic of Korea
- Department of Oral and Maxillofacial Surgery, Chosun University, Gwangju 501-759, Republic of Korea
- Oral Biology Research Institute, Chosun University, Gwangju 501-759, Republic of Korea
| | - Mi-Ae Jeong
- Department of Dental Hygiene, Kangwon National University, Samcheok, Gangwon 259-13, Republic of Korea
| | - Jae-Sung Kim
- Pre-Dentistry, School of Dentistry, Chosun University, Gwangju 501-759, Republic of Korea
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You JS, Cho IA, Kang KR, Oh JS, Yu SJ, Lee GJ, Seo YS, Kim SG, Kim CS, Kim DK, Im HJ, Kim JS. Coumestrol Counteracts Interleukin-1β-Induced Catabolic Effects by Suppressing Inflammation in Primary Rat Chondrocytes. Inflammation 2017; 40:79-91. [PMID: 27709316 DOI: 10.1007/s10753-016-0455-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
In the present study, we investigated the anti-catabolic effects of coumestrol, a phytoestrogen derived from herbal plants, against interleukin-1β-induced cartilage degeneration in primary rat chondrocytes and articular cartilage. Coumestrol did not affect the viability of human normal oral keratinocytes and primary rat chondrocytes treated for 24 h and 21 days, respectively. Although coumestrol did not significantly increase the proteoglycan contents in long-term culture, it abolished the interleukin-1β-induced loss of proteoglycans in primary rat chondrocytes and knee articular cartilage. Furthermore, coumestrol suppressed the expression of matrix-degrading enzymes such as matrix metalloproteinase-13, -3, and -1 in primary rat chondrocytes stimulated with interleukin-1β. Moreover, the expression of catabolic factors such as nitric oxide synthase, cyclooxygenase-2, prostaglandin E2, and inflammatory cytokines in interleukin-1β-stimulated primary rat chondrocytes was suppressed by coumestrol. In summary, these results indicate that coumestrol counteracts the catabolic effects induced by interleukin-1β through the suppression of inflammation. Therefore, based on its biological activity and safety profile, coumestrol could be used as a potential anti-catabolic biomaterial for osteoarthritis.
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Affiliation(s)
- Jae-Seek You
- Department of Oral and Maxillofacial Surgery, Chosun University, Gwangju, 61452, Republic of Korea
| | - In-A Cho
- Department of Oral and Maxillofacial Surgery, Chosun University, Gwangju, 61452, Republic of Korea
| | - Kyeong-Rok Kang
- Department of Oral and Maxillofacial Surgery, Chosun University, Gwangju, 61452, Republic of Korea
| | - Ji-Su Oh
- Department of Oral and Maxillofacial Surgery, Chosun University, Gwangju, 61452, Republic of Korea
| | - Sang-Joun Yu
- Department of Periodontology, Chosun University, Gwangju, 61452, Republic of Korea
| | - Gyeong-Je Lee
- Department of Prosthodontics, Chosun University, Gwangju, 61452, Republic of Korea
| | - Yo-Seob Seo
- Department of Oral and Maxillofacial Radiology, Chosun University, Gwangju, 61452, Republic of Korea
| | - Su-Gwan Kim
- Department of Oral and Maxillofacial Surgery, Chosun University, Gwangju, 61452, Republic of Korea
| | - Chun Sung Kim
- Pre-Dentistry,School of Dentistry, Chosun University, 309 Philmun-daero, Dong-gu, Gwangju, 61452, Republic of Korea
| | - Do Kyung Kim
- Pre-Dentistry,School of Dentistry, Chosun University, 309 Philmun-daero, Dong-gu, Gwangju, 61452, Republic of Korea
| | - Hee-Jeong Im
- Department of Biochemistry, Rush University Medical Center, Chicago, IL, 60612, USA
| | - Jae-Sung Kim
- Pre-Dentistry,School of Dentistry, Chosun University, 309 Philmun-daero, Dong-gu, Gwangju, 61452, Republic of Korea.
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Lee ST, Kim SG, Moon SY, Oh JS, You JS, Kim JS. The effect of decompression as treatment of the cysts in the jaws: retrospective analysis. J Korean Assoc Oral Maxillofac Surg 2017; 43:83-87. [PMID: 28462191 PMCID: PMC5410432 DOI: 10.5125/jkaoms.2017.43.2.83] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Revised: 06/03/2016] [Accepted: 06/24/2016] [Indexed: 12/04/2022] Open
Abstract
Objectives The purpose of this study is to evaluate the treatment efficacy of enucleation after decompression. Materials and Methods A total of 17 patients with cystic lesion of the jaw were treated with decompression followed by enucleation. Pre- and postdecompression panoramic radiographs were analyzed. Results The mean percentage of reduction after decompression was 64%. The reaction was graded as good (>80%) in five patients (29.4%), moderate (50%-80%) in nine patients (52.9%), and poor (<50%) in three patients (17.6%). The reduction rate of larger cystic lesions was faster than that of smaller lesions. However, the reduction rate was not affected by age. The duration of follow-up ranged from one to eight years. There were no complications, and one case recurred. Conclusion Decompression is an effective method for the initial treatment of jaw cysts.
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Affiliation(s)
- Sun-Tae Lee
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Korea
| | - Su-Gwan Kim
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Korea
| | - Seong-Young Moon
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Korea
| | - Ji-Su Oh
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Korea
| | - Jae-Seek You
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Korea
| | - Jae-Sung Kim
- Department of Pre-Dentistry, College of Dentistry, Chosun University, Gwangju, Korea
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Kim W, Kim BG, Lee JS, Lee CK, Yeon JE, Chang MS, Kim JH, Kim H, Yi S, Lee J, Cho JY, Kim SG, Lee JH, Kim YJ. Randomised clinical trial: the efficacy and safety of oltipraz, a liver X receptor alpha-inhibitory dithiolethione in patients with non-alcoholic fatty liver disease. Aliment Pharmacol Ther 2017; 45:1073-1083. [PMID: 28225186 DOI: 10.1111/apt.13981] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Revised: 05/31/2016] [Accepted: 01/22/2017] [Indexed: 12/11/2022]
Abstract
BACKGROUND Oltipraz is a synthetic dithiolethione with an antisteatotic effect by inhibiting the activity of liver X receptor alpha (LXR-α). Recent studies demonstrated the disruptive role of oltipraz on LXR-α-dependent lipogenesis in hepatocytes and a high-fat diet mouse model. AIM To evaluate the efficacy and safety of oltipraz for reducing liver fat in subjects with non-alcoholic fatty liver disease (NAFLD). METHODS We performed a multicentre, double-blind, placebo-controlled, phase II study. Subjects with a liver fat >20% and hypertransaminasemia were randomised to the three groups: placebo (n = 22), 30 mg of oltipraz (n = 22) or 60 mg of oltipraz (n = 24) twice daily for 24 weeks. Changes in the liver fat from baseline to 24 weeks quantified using magnetic resonance spectroscopy were the primary outcome. RESULTS Compared with the placebo group (-3.2 ± 11.1%), absolute changes in the liver fat content increased in a dose-dependent manner: -7.7 ± 7.0% and -13.9 ± 10.7% for the low-dose and high-dose groups (P = 0.13 and P < 0.01). Per cent reduction in the liver fat content was also significantly greater in the high-dose group than in the placebo group (-34.6 ± 29.4% vs. -0.6 ± 62.9%, P = 0.046). Body mass indices (-1.0 ± 0.9% vs. -0.5 ± 1.4%, P = 0.04) significantly decreased in the high-dose group compared to the placebo group. However, absolute changes in insulin resistance, liver enzymes, lipids and cytokines were not significantly different among groups. The incidence of adverse events was comparable among groups. CONCLUSIONS Twenty-four-week oltipraz treatment significantly reduced the liver fat content in patients with NAFLD. Clinicaltrials.gov (NCT01373554).
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Mah DH, Kim SG, Oh JS, You JS, Jung SY, Kim WG, Yu KH. Comparative study of postoperative stability between conventional orthognathic surgery and a surgery-first orthognathic approach after bilateral sagittal split ramus osteotomy for skeletal class III correction. J Korean Assoc Oral Maxillofac Surg 2017; 43:23-28. [PMID: 28280706 PMCID: PMC5342968 DOI: 10.5125/jkaoms.2017.43.1.23] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Revised: 03/31/2016] [Accepted: 04/05/2016] [Indexed: 12/05/2022] Open
Abstract
Objectives The purpose of this study is to compare the postoperative stability of conventional orthognathic surgery to a surgery-first orthognathic approach after bilateral sagittal split ramus osteotomy (BSSRO). Materials and Methods The study included 20 patients who underwent BSSRO for skeletal class III conventional orthognathic surgery and 20 patients who underwent a surgery-first orthognathic approach. Serial lateral cephalograms were analyzed to identify skeletal changes before surgery (T0), immediately after surgery (T1), and after surgery (T2, after 1 year or at debonding). Results The amount of relapse of the mandible in the conventional orthognathic surgery group from T1 to T2 was 2.23±0.92 mm (P<0.01) forward movement and −0.87±0.57 mm (non-significant, NS) upward movement on the basis of point B and 2.54±1.37 mm (P<0.01) forward movement and −1.18±0.79 mm (NS) upward movement on the basis of the pogonion (Pog) point. The relapse amount of the mandible in the surgery-first orthognathic approach group from T1 to T2 was 3.49±1.71 mm (P<0.01) forward movement and −1.78±0.81 mm (P<0.01) upward movement on the basis of the point B and 4.11±1.93 mm (P<0.01) forward movement and −2.40±0.98 mm (P<0.01) upward movement on the basis of the Pog. Conclusion The greater horizontal and vertical relapse may appear because of counter-clockwise rotation of the mandible in surgery-first orthognathic approach. Therefore, careful planning and skeletal stability should be considered in orthognathic surgery.
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Affiliation(s)
- Deuk-Hyun Mah
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Korea
| | - Su-Gwan Kim
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Korea
| | - Ji-Su Oh
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Korea
| | - Jae-Seek You
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Korea
| | - Seo-Yun Jung
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Korea
| | - Won-Gi Kim
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Korea
| | - Kyung-Hwan Yu
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Korea
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Ellman MB, Kim J, An HS, Chen D, Kc R, Li X, Xiao G, Yan D, Suh J, van Wijnen AJ, Wang JHC, Kim SG, Im HJ. Corrigendum to "Lactoferricin enhances BMP7-stimulated anabolic pathways in intervertebral disc cells" [Gene. 2013 Jul. 25; 524(2):282-91]. Gene 2017; 602:61. [PMID: 27354310 DOI: 10.1016/j.gene.2016.06.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Michael B Ellman
- Department of Biochemistry, Section of Rheumatology, Rush University Medical Center, Chicago, IL 60612, USA; Department of Orthopedic Surgery, Section of Rheumatology, Rush University Medical Center, Chicago, IL 60612, USA
| | - Jaesung Kim
- Department of Biochemistry, Section of Rheumatology, Rush University Medical Center, Chicago, IL 60612, USA
| | - Howard S An
- Department of Orthopedic Surgery, Section of Rheumatology, Rush University Medical Center, Chicago, IL 60612, USA
| | - Di Chen
- Department of Biochemistry, Section of Rheumatology, Rush University Medical Center, Chicago, IL 60612, USA
| | - Ranjan Kc
- Department of Biochemistry, Section of Rheumatology, Rush University Medical Center, Chicago, IL 60612, USA
| | - Xin Li
- Department of Biochemistry, Section of Rheumatology, Rush University Medical Center, Chicago, IL 60612, USA
| | - Guozhi Xiao
- Department of Biochemistry, Section of Rheumatology, Rush University Medical Center, Chicago, IL 60612, USA
| | - Dongyao Yan
- Department of Biochemistry, Section of Rheumatology, Rush University Medical Center, Chicago, IL 60612, USA
| | - Joon Suh
- Department of Biochemistry, Section of Rheumatology, Rush University Medical Center, Chicago, IL 60612, USA
| | - Andre J van Wijnen
- Center of Regenerative Medicine and Departments of Orthopedic Surgery & Biochemistry & Molecular Biology, Mayo Clinic, Rochester, MN 55905, USA
| | - James H-C Wang
- MechanoBiology Laboratory, Departments of Orthopedic Surgery and Bioengineering, University of Pittsburgh, PA 15213, USA
| | - Su-Gwan Kim
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, GwangJu City 501-759, Republic of Korea
| | - Hee-Jeong Im
- Department of Biochemistry, Section of Rheumatology, Rush University Medical Center, Chicago, IL 60612, USA; Department of Orthopedic Surgery, Section of Rheumatology, Rush University Medical Center, Chicago, IL 60612, USA; Department of Internal Medicine, Section of Rheumatology, Rush University Medical Center, Chicago, IL 60612, USA; Department of Bioengineering, University of Illinois at Chicago, IL 60612, USA.
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Yoon WJ, Kim SG, Oh JS, You JS, Jeong KI, Lim SC, Jeong MA. Comparative study on the osseointegration of implants in dog mandibles according to the implant surface treatment. J Korean Assoc Oral Maxillofac Surg 2016; 42:345-351. [PMID: 28053904 PMCID: PMC5206239 DOI: 10.5125/jkaoms.2016.42.6.345] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Revised: 02/26/2016] [Accepted: 02/26/2016] [Indexed: 02/05/2023] Open
Abstract
OBJECTIVES This study compared the impact of implant surface treatment on the stability and osseointegration of implants in dog mandibles. MATERIALS AND METHODS Six adult dogs received a total of 48 implants that were prepared using four different surface treatments; resorbable blast media (RBM), hydroxyapatite (HA), hydrothermal-treated HA, and sand blasting and acid etching (SLA). Implants were installed, and dogs were separated into 2- and 4-week groups. Implant stability was evaluated via Periotest M, Osstell Mentor, and removal torque analyzers. A histomorphometric analysis was also performed. RESULTS The stability evaluation showed that all groups generally had satisfactory values. The histomorphometric evaluation via a light microscope revealed that the HA surface implant group had the highest ratio of new bone formation on the entire fixture. The hydrothermal-treated HA surface implant group showed a high ratio of bone-to-implant contact in the upper half of the implant area. CONCLUSION The hydrothermal-treated HA implant improved the bone-to-implant contact ratio on the upper fixture, which increased the implant stability.
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Affiliation(s)
- Wook-Jae Yoon
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Korea
| | - Su-Gwan Kim
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Korea
| | - Ji-Su Oh
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Korea
| | - Jae-Seek You
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Korea
| | - Kyung-In Jeong
- Department of Oral and Maxillofacial Surgery, Section of Dentistry, Konyang University Hospital, Daejeon, Korea
| | - Sung-Chul Lim
- Department of Pathology, School of Medicine, Chosun University, Gwangju, Korea
| | - Mi-Ae Jeong
- Department of Dental Hygiene, Kangwon National University, Samcheok, Korea
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Seo DU, Kim SG, Oh JS, You JS. Treatment of nevoid basal cell carcinoma syndrome: a case report. J Korean Assoc Oral Maxillofac Surg 2016; 42:284-287. [PMID: 27847737 PMCID: PMC5104871 DOI: 10.5125/jkaoms.2016.42.5.284] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Revised: 12/16/2015] [Accepted: 12/29/2015] [Indexed: 11/26/2022] Open
Abstract
Nevoid basal cell carcinoma syndrome (NBCCS), also known as Gorlin syndrome, is characterized by various embryological deformities and carcinoma formation. It is caused by PTCHI gene mutations and is autosomal dominantly inherited. Some of the main symptoms of NBCCS are multiple basal cell carcinomas, multiple keratocystic odontogenic tumors (KCOTs) of the mandible, hyperkeratosis of the palmar and plantar, skeletal deformity, calcification of the falx cerebri, and facial defomity. Recurrent KCOT is the main symptom of NBCCS and is present in approximately 90% of patients. In NBCCS, KCOTs typically occur in multiples. KCOTs can be detected in patients under the age of 10, and new and recurring cysts develop until approximately the age of 30. The postoperation recurrence rate is approximately 60%. This case report presents a 14-year-old female patient with a chief complaint of a cyst found in the maxilla and mandible. The patient was diagnosed with NBCCS, and following treatment of marsupialization and enucleation, the clinical results were satisfactory.
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Affiliation(s)
- Dong-Uk Seo
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Korea
| | - Su-Gwan Kim
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Korea
| | - Ji-Su Oh
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Korea
| | - Jae-Seek You
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Korea
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Kim YG, Song JB, Choi YH, Yang DG, Kim SG, Lee HG. Investigation on quench initiation and propagation characteristics of GdBCO coil co-wound with a stainless steel tape as turn-to-turn metallic insulation. Rev Sci Instrum 2016; 87:114701. [PMID: 27910603 DOI: 10.1063/1.4966676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
This paper investigates the quench initiation and propagation characteristics of a metallic insulation (MI) coil by conducting thermal quench tests for a GdBCO single-pancake coil co-wound with a stainless steel tape as the turn-to-turn MI. The test results confirmed that the MI coil exhibited superior thermal and electrical stabilities compared to the conventional coils co-wound with organic insulation material because the operating current could flow along the radial direction due to the existence of a turn-to-turn contact when a local hot spot was generated. The results of the quench test at a heater current (Ih) of 12, 13, and 14 A indicate that the MI coil possesses a self-protecting characteristic resulting from the "current bypass" through the turn-to-turn contact. However, the test coil was not self-protecting at Ih = 15 A because the Joule heat energy generated by the radial current flow was not completely dissipated due to the characteristic resistance of the metallic insulation tape and the non-superconducting materials, including the substrate, stabilizer, and buffer layers within the high-temperature superconductor (HTS) tape. Even though the MI coil possesses superior thermal and electrical stability relative to those of conventional HTS coils co-wound with an organic material as turn-to-turn insulation, it is essential to consider the critical role of the Joule heat energy resulting from the operating current and stored magnetic energy as well as the characteristic resistances in order to further develop self-protective 2G HTS magnets.
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Affiliation(s)
- Y G Kim
- Department of Materials Science and Engineering, Korea University, Anam-dong 5 ga, Seongbuk-gu, Seoul 136-713, South Korea
| | - J B Song
- Department of Materials Science and Engineering, Korea University, Anam-dong 5 ga, Seongbuk-gu, Seoul 136-713, South Korea
| | - Y H Choi
- Department of Materials Science and Engineering, Korea University, Anam-dong 5 ga, Seongbuk-gu, Seoul 136-713, South Korea
| | - D G Yang
- Department of Materials Science and Engineering, Korea University, Anam-dong 5 ga, Seongbuk-gu, Seoul 136-713, South Korea
| | - S G Kim
- Department of Materials Science and Engineering, Korea University, Anam-dong 5 ga, Seongbuk-gu, Seoul 136-713, South Korea
| | - H G Lee
- Department of Materials Science and Engineering, Korea University, Anam-dong 5 ga, Seongbuk-gu, Seoul 136-713, South Korea
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Yang SS, Kim SG, Park BS, Go DS, Yu SK, Kim CS, Kim J, Kim DK. Effect of β-carotene on Cell Growth Inhibition of KB Human Oral Cancer Cells. ACTA ACUST UNITED AC 2016. [DOI: 10.11620/ijob.2016.41.3.105] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Park HC, Kim SG, Oh JS, You JS, Kim WG. Mini-plate removal in maxillofacial trauma patients during a five-year retrospective study. J Korean Assoc Oral Maxillofac Surg 2016; 42:182-6. [PMID: 27595084 PMCID: PMC5009191 DOI: 10.5125/jkaoms.2016.42.4.182] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Revised: 06/11/2015] [Accepted: 06/26/2015] [Indexed: 11/07/2022] Open
Abstract
OBJECTIVES The purpose of this study was to analyze the incidence of indications for the removal of mini-plates over a five-year period in maxillofacial trauma patients. MATERIALS AND METHODS The medical records of 530 patients who underwent treatment with mini-plate fixation after maxillofacial trauma were reviewed for a five-year period (May 2007 to May 2012). Patients were evaluated concerning the number of mini-plates removed, age and gender distributions, time between insertion and removal, indication for removal, and site of removal. RESULTS The plates of 120 patients were removed (26 females and 94 males). The removal rate was 22.6%. The most frequent indication for removal was patient demand (81.7%), followed by tooth extraction (7.5%), and pain (3.3%). The most frequent removal site was the mandible (95.0%). CONCLUSION The number of mini-plates removed was small, and the most common indication for removal was patient demand. There is no evidence to support a recommendation for the routine removal of titanium mini-plates.
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Affiliation(s)
- Hyun-Chun Park
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Korea
| | - Su-Gwan Kim
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Korea
| | - Ji-Su Oh
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Korea
| | - Jae-Seek You
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Korea
| | - Won-Gi Kim
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Korea
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Seo YS, Yim MJ, Kim BH, Kang KR, Lee SY, Oh JS, You JS, Kim SG, Yu SJ, Lee GJ, Kim DK, Kim CS, Kim JS, Kim JS. Berberine-induced anticancer activities in FaDu head and neck squamous cell carcinoma cells. Oncol Rep 2016; 34:3025-34. [PMID: 26503508 DOI: 10.3892/or.2015.4312] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Accepted: 08/10/2015] [Indexed: 11/06/2022] Open
Abstract
In the present study, we investigated berberine‑induced apoptosis and the signaling pathways underlying its activity in FaDu head and neck squamous cell carcinoma cells. Berberine did not affect the viability of primary human normal oral keratinocytes. In contrast, the cytotoxicity of berberine was significantly increased in FaDu cells stimulated with berberine for 24 h. Furthermore, berberine increased nuclear condensation and apoptosis rates in FaDu cells than those in untreated control cells. Berberine also induced the upregulation of apoptotic ligands, such as FasL and TNF-related apoptosis-inducing ligand, and triggered the activation of caspase-8, -7 and -3, and poly(ADP ribose) polymerase, characteristic of death receptor-dependent extrinsic apoptosis. Moreover, berberine activated the mitochondria‑dependent apoptotic signaling pathway by upregulating pro-apoptotic factors, such as Bax, Bad, Apaf-1, and the active form of caspase-9, and downregulating anti-apoptotic factors, such as Bcl-2 and Bcl-xL. In addition, berberine increased the expression of the tumor suppressor p53 in FaDu cells. The pan-caspase inhibitor Z-VAD-fmk suppressed the activation of caspase-3 and prevented cytotoxicity in FaDu cells treated with berberine. Interestingly, berberine suppressed cell migration through downregulation of vascular endothelial growth factor (VEGF), matrix metalloproteinase (MMP)-2, and MMP-9. Moreover, the phosphorylation of extracellular signal-regulated kinase (ERK1/2) and p38, components of the mitogen-activated protein kinase pathway that are associated with the expression of MMP and VEGF, was suppressed in FaDu cells treated with berberine for 24 h. Therefore, these data suggested that berberine exerted anticancer effects in FaDu cells through induction of apoptosis and suppression of migration. Berberine may have potential applications as a chemotherapeutic agent for the management of head and neck squamous carcinoma.
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Kim YK, Ahn KJ, Yun PY, Yi YJ, Kim SG. The clinical prognosis of implants that are placed against super-erupted opposing dentition. J Korean Assoc Oral Maxillofac Surg 2016; 42:139-43. [PMID: 27429935 PMCID: PMC4940198 DOI: 10.5125/jkaoms.2016.42.3.139] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Revised: 07/13/2015] [Accepted: 08/18/2015] [Indexed: 11/07/2022] Open
Abstract
OBJECTIVES If teeth are missing, super-eruption of teeth in the opposing arch can occur in the area and can change the occlusal plane. When missing teeth are replaced with implants, the oral surgeon must determine whether or not the super-erupted teeth need to be treated in order to normalize the occlusal plane. In this study, we evaluated the clinical prognosis of dentition after implant placement and prosthetic treatment were completed in an occlusal plane altered by super-erupted teeth in the opposing arch without additional treatment of the super-erupted teeth. MATERIALS AND METHODS Twenty-two patients (9 males, 13 females) were treated with implants and prosthetics without addressing the super-erupted opposing dentition from April 2004 to August 2012 at Seoul National University Bundang Hospital. A total of 33 implants were placed. Values of crestal bone loss, survival rates, and surgical and prosthetic complications for an average of 29.6 months after prosthetic loading were recorded. RESULTS In one case, the cover screw was exposed after implant surgery. The mean crestal bone loss was 0.09±0.30 mm. Of the 33 implants, 31 survived, a survival rate of 93.94%. A prosthetic complication occurred in one case but functioned well after correction. CONCLUSION Favorable clinical results from prosthetic complications, crestal bone loss, and implant survival rates were exhibited in implants next to a super-erupted opposing tooth.
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Affiliation(s)
- Young-Kyun Kim
- Department of Oral and Maxillofacial Surgery, Section of Dentistry, Seoul National University Bundang Hospital, Seongnam, Korea.; Department of Dentistry and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Korea
| | - Kyo-Jin Ahn
- Department of Oral and Maxillofacial Surgery, Section of Dentistry, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Pil-Young Yun
- Department of Oral and Maxillofacial Surgery, Section of Dentistry, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Yang-Jin Yi
- Department of Prosthodontics, Section of Dentistry, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Su-Gwan Kim
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Korea
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Oh JS, Cho IA, Kang KR, You JS, Yu SJ, Lee GJ, Seo YS, Kim CS, Kim DK, Kim SG, Seo YW, Im HJ, Kim JS. Biochanin-A antagonizes the interleukin-1β-induced catabolic inflammation through the modulation of NFκB cellular signaling in primary rat chondrocytes. Biochem Biophys Res Commun 2016; 477:723-730. [PMID: 27363337 DOI: 10.1016/j.bbrc.2016.06.126] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Accepted: 06/25/2016] [Indexed: 10/21/2022]
Abstract
Biochanin-A, a phytoestrogen derived from herbal plants, protected from the IL-1β-induced loss of proteoglycans through the suppression of matrix degrading enzymes such as matrix metalloproteinase (MMP)-13, MMP-3, MMP-1, and ADAMTS-5 in primary rat chondrocytes and the knee articular cartilage. It also suppressed the expression of IL-1β-induced catabolic factors such as nitric oxide synthase 2, cyclooxygenase-2, prostaglandin E2, and inflammatory cytokines. Furthermore, biochanin-A suppressed the IL-1β-induced phosphorylation of NFκB, and inhibited its nuclear translocation in primary rat chondrocytes. These results indicate that biochanin-A antagonizes the IL-1β-induced catabolic effects through its anti-inflammatory activity that involves the modulation of NFκB signaling.
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Affiliation(s)
- Ji-Su Oh
- Department of Oral and Maxillofacial Surgery, Chosun University, Gwangju, 61452, Republic of Korea
| | - In-A Cho
- Department of Dental Bioengineering, Chosun University, Gwangju, 61452, Republic of Korea
| | - Kyeong-Rok Kang
- Department of Dental Bioengineering, Chosun University, Gwangju, 61452, Republic of Korea
| | - Jae-Seek You
- Department of Oral and Maxillofacial Surgery, Chosun University, Gwangju, 61452, Republic of Korea
| | - Sang-Joun Yu
- Department of Periodontology, Chosun University, Gwangju, 61452, Republic of Korea
| | - Gyeong-Je Lee
- Department of Prosthodontics, Chosun University, Gwangju, 61452, Republic of Korea
| | - Yo-Seob Seo
- Department of Oral and Maxillofacial Radiology, Chosun University, Gwangju, 61452, Republic of Korea
| | - Chun Sung Kim
- Pre-Dentistry, School of Dentistry, Chosun University, Gwangju, 61452, Republic of Korea
| | - Do Kyung Kim
- Pre-Dentistry, School of Dentistry, Chosun University, Gwangju, 61452, Republic of Korea
| | - Su-Gwan Kim
- Department of Oral and Maxillofacial Surgery, Chosun University, Gwangju, 61452, Republic of Korea
| | - Young-Woo Seo
- Korea Basic Science Institute, Gwangju Center, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Hee-Jeong Im
- Department of Biochemistry, Rush University Medical Center, Chicago, IL, 60612, USA
| | - Jae-Sung Kim
- Pre-Dentistry, School of Dentistry, Chosun University, Gwangju, 61452, Republic of Korea.
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Kim RW, Lee SY, Kim SG, Heo YR, Son MK. Antimicrobial, Antioxidant and Cytotoxic Activities of Dendropanax morbifera Léveille extract for mouthwash and denture cleaning solution. J Adv Prosthodont 2016; 8:172-80. [PMID: 27350850 PMCID: PMC4919486 DOI: 10.4047/jap.2016.8.3.172] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Revised: 11/26/2015] [Accepted: 12/14/2015] [Indexed: 11/08/2022] Open
Abstract
PURPOSE The purpose of this study was to analyze the antimicrobial, antioxidant activity and cytotoxicity of Dendropanax morbifera Léveille extract for assessing whether Dendropanax morbifera Léveille can be used for the development of natural mouthwash and denture cleaning solution. MATERIALS AND METHODS The extract was obtained from branches of Dendropanax morbifera Léveille. The solvent fractions were acquired by fractionating Dendropanax morbifera Léveille extract using n-hexane, ethyl acetate, chloroform and butanol solvent. Paper disc test was used to evaluate the antimicrobial and antifungal activity of Dendropanax morbifera Léveille extract and solvent fractions against Streptococcus mutans and Candida albicans. The analysis of antioxidant activity was carried out through DPPH radical scavenging assay. The cytotoxicity of Dendropanax morbifera Léveille extract was analyzed through MTT assay using normal human oral keratinocytes. RESULTS Dendropanax morbifera Léveille extract showed antimicrobial activity against Streptococcus mutans and especially Candida albicans. The solvent fractions of Dendropanax morbifera Léveille showed strong antimicrobial activity against Streptococcus mutans and Candida albicans in n-hexane and butanol solvent fraction, respectively. Dendropanax morbifera Léveille extract also showed outstanding antioxidant activity. Butanol, ethyl acetate, and chloroform solvent fraction of Dendropanax morbifera Léveille tended to have increased antioxidant activity as the concentration increased. Dendropanax morbifera Léveille extract showed high cell survival rate in cytotoxicity test. CONCLUSION Dendropanax morbifera Léveille extract turned out to have antimicrobial, antioxidant activity and cytophilicity. Based on these results, it is expected that Dendropanax morbifera Léveille is applicable as an ingredient for natural mouthwash and denture cleanser.
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Affiliation(s)
- Ryeo-Woon Kim
- Department of Prosthodontics, School of Dentistry, Chosun University, Gwangju, Republic of Korea
| | - Sook-Young Lee
- Regional Innovation Center for Dental Science & Engineering, Chosun University, Gwangju, Republic of Korea
| | - Su-Gwan Kim
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Republic of Korea
| | - Yu-Ri Heo
- Department of Prosthodontics, School of Dentistry, Chosun University, Gwangju, Republic of Korea
| | - Mee-Kyoung Son
- Department of Prosthodontics, School of Dentistry, Chosun University, Gwangju, Republic of Korea
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Park HC, Kim SG, Oh JS, You JS, Kim JS, Lim SC, Jeong MA, Kim JS, Jung C, Kwon YS, Ji H. Early Bone Formation at a Femur Defect Using CGF and PRF Grafts in Adult Dogs: A Comparative Study. IMPLANT DENT 2016; 25:387-93. [PMID: 27123893 DOI: 10.1097/id.0000000000000423] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
PURPOSE The purpose of this study was to compare the predictability of new bone formation using an autologous concentrated growth factor (CGF) graft alone and platelet graft alone. MATERIALS AND METHODS Four bony defects of 8 mm were formed, and 3.7- × 10-mm implants were placed in the right femur. The platelet-rich fibrin (PRF), CGF, and synthetic bone were grafted to the bone defect area. Enzyme linked immunosorbent assay quantitative analysis and microscopic analysis of the fibrinogen structure were performed. RESULTS At 4 weeks, the comparisons of each experimental group showed a significant difference between the CGF group and the synthetic bone graft group. When comparing the CGF and allograft material groups, the allograft group showed significantly more new bone formation. In the case of vascular endothelial growth factor, CGF had 1.5 times more than PRF. CGF showed a fibrinogen structure with a constant diameter. CONCLUSION When applied to a clinical case, CGF is predicted to show better results than PRF.
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Affiliation(s)
- Hyun-Chun Park
- *Resident, Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Republic of Korea. †Professor, Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Republic of Korea. ‡Associate Professor, Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Republic of Korea. §Assistant Professor, Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Republic of Korea. ¶Assistant Professor, Department of Pre-Dentistry, School of Dentistry, Chosun University, Gwangju, Republic of Korea. ‖Professor, Department of Pathology, School of Medicine, Chosun University, Gwangju, Republic of Korea. #Professor, Department of Dental Hygiene, Kangwon National University, Samcheok, Republic of Korea. ††Clinical doctor, Misomore Dental Clinic, Jeonju, Republic of Korea
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Lee GJ, Cho IA, Kang KR, Kim DK, Sohn HM, You JW, Oh JS, Seo YS, Yu SJ, You JS, Kim CS, Kim SG, Im HJ, Kim JS. Biological Effects of the Herbal Plant-Derived Phytoestrogen Bavachin in Primary Rat Chondrocytes. Biol Pharm Bull 2016; 38:1199-207. [PMID: 26235583 DOI: 10.1248/bpb.b15-00198] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The aim of this study was to examine the anabolic and anticatabolic functions of bavachin in primary rat chondrocytes. With bavachin treatment, chondrocytes survived for 21 d without cell proliferation, and the proteoglycan content and extracellular matrix increased. Short-term monolayer culture of chondrocytes showed that gene induction of both aggrecan and collagen type II, major extracellular matrix components, was significantly upregulated by bavachin. The expression and activities of cartilage-degrading enzymes such as matrix metalloproteinases and a disintegrin and metalloproteinase with thrombospondin motifs were inhibited significantly by bavachin, while tissue inhibitors of metalloprotease were significantly upregulated. Bavachin inhibits the expression of inducible nitric oxide synthase, a representative catabolic factor, and downregulated the expression of nitric oxide, cyclooxygenase-2, and prostaglandin E2 in a dose-dependent manner in chondrocytes. Our results suggest that the bavachin has anabolic and potent anticatabolic biological effects on chondrocytes, which may have considerable promise in treating articular cartilage degeneration in the future.
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Affiliation(s)
- Gyeong-Je Lee
- Department of Prosthodontics, School of Dentistry, Chosun University
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Affiliation(s)
- Su-Gwan Kim
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Korea
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Abstract
Background The utilization of a cone-beam computed tomography (CT)-assisted surgical template allows for predictable results because implant placement plans can be performed in the actual surgery. In order to assess the accuracy of the CT-guided surgery, angular errors and shoulder/apex distance errors were evaluated by data fusion from before and after the placement. Methods Computer-guided implant surgery was performed in five patients with 19 implants. In order to analyze differences of the implant fixture body between preoperative planned implant and postoperative placed implant, angular error and distance errors were evaluated. Results The mean angular errors between the preoperative planned and postoperative placed implant was 3.84° ± 1.49°; the mean distance errors between the planned and placed implants were 0.45 ± 0.48 mm horizontally and 0.63 ± 0.51 mm vertically at the implant neck and 0.70 ± 0.63 mm horizontally and 0.64 ± 0.57 mm vertically at the implant apex for all 19 implants. Conclusions It is important to be able to utilize these methods in actual clinical settings by improving the various problems, including the considerations of patient mouth opening limitations, surgical guide preparation, and fixation.
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Affiliation(s)
- Seong-Yong Moon
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, 375 Seosuk dong, Dong-gu, Gwangju, 501-759 South Korea
| | - Kyoung-Rok Lee
- Department of Prosthodontics, Graduate School of Dentistry, Chosun University, 375 Seosuk dong, Dong-gu, Gwangju, 501-759 South Korea
| | - Su-Gwan Kim
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, 375 Seosuk dong, Dong-gu, Gwangju, 501-759 South Korea
| | - Mee-Kyoung Son
- Department of Prosthodontics, School of Dentistry, Chosun University, 375 Seosuk dong, Dong-gu, Gwangju, 501-759 South Korea
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Jin SY, Kim SG, Oh JS, You JS, Lim SC, Jeong MA, Kim JS. Histomorphometric Analysis of Contaminated Autogenous Tooth Graft Materials After Various Sterilization. IMPLANT DENT 2016; 25:83-9. [PMID: 26544734 DOI: 10.1097/id.0000000000000351] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
PURPOSE The purpose of this study was to evaluate histomorphometrically contaminated autogenous tooth graft materials, which were resterilized. MATERIALS AND METHODS The intentional defects (diameter: 8 mm, depth: 4 mm) were formed around implant fixture on the iliac crest of 6 mongrel dogs. Autogenous tooth graft materials were made by extracted premolars. After the contamination of the tooth materials, graft procedure was performed; no contaminated group (control group), contaminated groups (nonsterilization group [group 1], ethylene oxide [EO] gas group [group 2], and autoclave group [group 3]). The bone-to-implant contact (BIC) and the new bone formation rate (NBFR) were evaluated after sacrifice. RESULTS The BIC and NBFR of groups 1 and 3 were significantly lower than the control group after 4 weeks. The BIC and NBRF of group 3 were significantly lower than the control group after 8 weeks. However, the BIC and NBRF of group 2 was not significantly different comparing with the control group after 4 and 8 weeks. CONCLUSION Sterilization using EO gas may be more favorable than high-pressure sterilization in cases the reuse of contaminated autogenous tooth graft materials.
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Affiliation(s)
- Soo-Young Jin
- *Graduate Student, Department of Oral and Maxillofacial Surgery, College of Dentistry, Chosun University, Gwangju, Republic of Korea. †Professor, Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Republic of Korea. ‡Associate Professor, Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Republic of Korea. §Assistant Professor, Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Republic of Korea. ¶Professor, Department of Pathology, School of Medicine, Chosun University, Gwangju, Republic of Korea. ‖Associate Professor, Department of Dental Hygiene, Kangwon National University, Samcheok, Republic of Korea. #Clinical Doctor, Misomore Dental Clinic, Jeonju, Republic of Korea
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45
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Jeong KI, Kim YK, Moon SW, Kim SG, Lim SC, Yun PY. Histologic analysis of resorbable blasting media surface implants retrieved from humans: a report of two cases. J Korean Assoc Oral Maxillofac Surg 2016; 42:38-42. [PMID: 26904493 PMCID: PMC4761571 DOI: 10.5125/jkaoms.2016.42.1.38] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Revised: 04/21/2015] [Accepted: 05/03/2015] [Indexed: 02/05/2023] Open
Abstract
The purpose of this study is to evaluate the degree of osseointegration of resorbable blasting media (RBM) surface implants retrieved from humans. Three implants in the mandibular molar region that were surface-treated with RBM were retrieved from two patients. The implants were used to manufacture specimens in order to measure the bone-implant contact (BIC) ratio. The BIC ratios of the three implants were found to be an average of 69.0%±9.1%. In conclusion, that RBM surface implants are integrated into the host environment with histological significance and the BIC ratio of the RBM surface-treated implant was not significantly different from that of other surface-treated implants.
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Affiliation(s)
- Kyung-In Jeong
- Department of Oral and Maxillofacial Surgery, Section of Dentistry, Konyang University Hospital, Daejeon, Korea
| | - Young-Kyun Kim
- Department of Oral and Maxillofacial Surgery, Section of Dentistry, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Sang-Woon Moon
- Department of Oral and Maxillofacial Surgery, Section of Dentistry, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Su-Gwan Kim
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Korea
| | - Sung-Chul Lim
- Department of Pathology, School of Medicine, Chosun University, Gwangju, Korea
| | - Pil-Young Yun
- Department of Oral and Maxillofacial Surgery, Section of Dentistry, Seoul National University Bundang Hospital, Seongnam, Korea
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46
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Min HG, Kim SG, Oh JS, You JS. Sclerotherapy using 1% sodium tetradecyl sulfate to treat a vascular malformation: a report of two cases. J Korean Assoc Oral Maxillofac Surg 2016; 41:322-6. [PMID: 26734559 PMCID: PMC4699933 DOI: 10.5125/jkaoms.2015.41.6.322] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2015] [Revised: 06/11/2015] [Accepted: 06/11/2015] [Indexed: 12/19/2022] Open
Abstract
Vascular malformations are the most common congenital and neonatal vascular anomalies in the head and neck region. The demand for simple and esthetic vascular malformation treatments have increased more recently. In this study, two patients that were diagnosed with venous malformations were treated with sodium tetradecyl sulfate as a sclerosing agent. Recurrence was not found one year after the surgery. This article gives a brief case report of sclerotherapy as an effective approach to treat vascular malformations in the oral cavity.
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Affiliation(s)
- Hong-Gi Min
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Korea
| | - Su-Gwan Kim
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Korea
| | - Ji-Su Oh
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Korea
| | - Jae-Seek You
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Korea
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48
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Kim JS, Ahmadinia K, Li X, Hamilton JL, Andrews S, Haralampus CA, Xiao G, Sohn HM, You JW, Seo YS, Stein GS, Van Wijnen AJ, Kim SG, Im HJ. Development of an Experimental Animal Model for Lower Back Pain by Percutaneous Injury-Induced Lumbar Facet Joint Osteoarthritis. J Cell Physiol 2015; 230:2837-47. [PMID: 25858171 DOI: 10.1002/jcp.25015] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Accepted: 04/06/2015] [Indexed: 01/07/2023]
Abstract
We report generation and characterization of pain-related behavior in a minimally invasive facet joint degeneration (FJD) animal model in rats. FJD was produced by a non-open percutaneous puncture-induced injury on the right lumbar FJs at three consecutive levels. Pressure hyperalgesia in the lower back was assessed by measuring the vocalization response to pressure from a force transducer. After hyperalgesia was established, pathological changes in lumbar FJs and alterations of intervertebral foramen size were assessed by histological and imaging analyses. To investigate treatment options for lumber FJ osteoarthritis-induced pain, animals with established hyperalgesia were administered with analgesic drugs, such as morphine, a selective COX-2 inhibitor, a non-steroidal anti-inflammatory drug (NSAID) (ketorolac), or pregabalin. Effects were assessed by behavioral pain responses. One week after percutaneous puncture-induced injury of the lumbar FJs, ipsilateral primary pressure hyperalgesia developed and was maintained for at least 12 weeks without foraminal stenosis. Animals showed decreased spontaneous activity, but no secondary hyperalgesia in the hind paws. Histopathological and microfocus X-ray computed tomography analyses demonstrated that the percutaneous puncture injury resulted in osteoarthritis-like structural changes in the FJs cartilage and subchondral bone. Pressure hyperalgesia was completely reversed by morphine. The administration of celecoxib produced moderate pain reduction with no statistical significance while the administration of ketorolac and pregabalin produced no analgesic effect on FJ osteoarthritis-induced back pain. Our animal model of non-open percutanous puncture-induced injury of the lumbar FJs in rats shows similar characteristics of low back pain produced by human facet arthropathy.
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Affiliation(s)
- Jae-Sung Kim
- The Division of Natural Medical Sciences, College of Health Science, Chosun University, Gwangju, Republic of Korea.,Departments of Biochemistry, Rush University Medical Center, Chicago, Illinois
| | - Kasra Ahmadinia
- Departments of Biochemistry, Rush University Medical Center, Chicago, Illinois.,Orthopedic Surgery, Rush University Medical Center, Chicago, Illinois
| | - Xin Li
- Departments of Biochemistry, Rush University Medical Center, Chicago, Illinois
| | - John L Hamilton
- Departments of Biochemistry, Rush University Medical Center, Chicago, Illinois
| | | | - Chris A Haralampus
- Departments of Biochemistry, Rush University Medical Center, Chicago, Illinois
| | - Guozhi Xiao
- Departments of Biochemistry, Rush University Medical Center, Chicago, Illinois.,Department of Biology and Shenzhen Key Laboratory of Cell Microenvironment, South University of Science and Technology of China, Shenzhen, China
| | - Hong-Moon Sohn
- Departments of Orthopaedic Surgery, School of Medicine, School of Dentistry, Chosun University, Gwangju, Republic of Korea
| | - Jae-Won You
- Departments of Orthopaedic Surgery, School of Medicine, School of Dentistry, Chosun University, Gwangju, Republic of Korea
| | - Yo-Seob Seo
- Department of Oral and Maxillofacial Radiology, School of Dentistry, Chosun University, Gwangju, Republic of Korea
| | - Gary S Stein
- Department of Biochemistry, University of Vermont Medical School, Burlington, Vermont
| | - Andre J Van Wijnen
- Departments of Orthopedic Surgery and Biochemistry and Molecular Biology, Mayo Clinic, Rochester, Minnesota
| | - Su-Gwan Kim
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Republic of Korea
| | - Hee-Jeong Im
- Departments of Biochemistry, Rush University Medical Center, Chicago, Illinois.,Orthopedic Surgery, Rush University Medical Center, Chicago, Illinois.,Internal Medicine Section of Rheumatology, Rush University Medical Center, Chicago, Illinois.,Department of Bioengineering, University of Illinois, Chicago, Illinois.,Jesse Brown Veterans Affairs, Chicago, Illinois
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49
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Wang S, Martinez-Lage M, Sakai Y, Chawla S, Kim SG, Alonso-Basanta M, Lustig RA, Brem S, Mohan S, Wolf RL, Desai A, Poptani H. Differentiating Tumor Progression from Pseudoprogression in Patients with Glioblastomas Using Diffusion Tensor Imaging and Dynamic Susceptibility Contrast MRI. AJNR Am J Neuroradiol 2015; 37:28-36. [PMID: 26450533 DOI: 10.3174/ajnr.a4474] [Citation(s) in RCA: 97] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Accepted: 06/02/2015] [Indexed: 12/31/2022]
Abstract
BACKGROUND AND PURPOSE Early assessment of treatment response is critical in patients with glioblastomas. A combination of DTI and DSC perfusion imaging parameters was evaluated to distinguish glioblastomas with true progression from mixed response and pseudoprogression. MATERIALS AND METHODS Forty-one patients with glioblastomas exhibiting enhancing lesions within 6 months after completion of chemoradiation therapy were retrospectively studied. All patients underwent surgery after MR imaging and were histologically classified as having true progression (>75% tumor), mixed response (25%-75% tumor), or pseudoprogression (<25% tumor). Mean diffusivity, fractional anisotropy, linear anisotropy coefficient, planar anisotropy coefficient, spheric anisotropy coefficient, and maximum relative cerebral blood volume values were measured from the enhancing tissue. A multivariate logistic regression analysis was used to determine the best model for classification of true progression from mixed response or pseudoprogression. RESULTS Significantly elevated maximum relative cerebral blood volume, fractional anisotropy, linear anisotropy coefficient, and planar anisotropy coefficient and decreased spheric anisotropy coefficient were observed in true progression compared with pseudoprogression (P < .05). There were also significant differences in maximum relative cerebral blood volume, fractional anisotropy, planar anisotropy coefficient, and spheric anisotropy coefficient measurements between mixed response and true progression groups. The best model to distinguish true progression from non-true progression (pseudoprogression and mixed) consisted of fractional anisotropy, linear anisotropy coefficient, and maximum relative cerebral blood volume, resulting in an area under the curve of 0.905. This model also differentiated true progression from mixed response with an area under the curve of 0.901. A combination of fractional anisotropy and maximum relative cerebral blood volume differentiated pseudoprogression from nonpseudoprogression (true progression and mixed) with an area under the curve of 0.807. CONCLUSIONS DTI and DSC perfusion imaging can improve accuracy in assessing treatment response and may aid in individualized treatment of patients with glioblastomas.
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Affiliation(s)
- S Wang
- From the Departments of Radiology (S.W., Y.S., S.M., R.L.W., H.P.)
| | - M Martinez-Lage
- Division of Neuroradiology, Pathology and Laboratory Medicine (M.M.-L.)
| | - Y Sakai
- From the Departments of Radiology (S.W., Y.S., S.M., R.L.W., H.P.)
| | - S Chawla
- Department of Radiology (S.C., S.G.K.), Center for Biomedical Imaging, New York University School of Medicine, New York, New York
| | - S G Kim
- Department of Radiology (S.C., S.G.K.), Center for Biomedical Imaging, New York University School of Medicine, New York, New York
| | | | | | | | - S Mohan
- From the Departments of Radiology (S.W., Y.S., S.M., R.L.W., H.P.)
| | - R L Wolf
- From the Departments of Radiology (S.W., Y.S., S.M., R.L.W., H.P.)
| | - A Desai
- Hematology-Oncology (A.D.), Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania
| | - H Poptani
- From the Departments of Radiology (S.W., Y.S., S.M., R.L.W., H.P.)
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50
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Im JH, Kim SG, Oh JS, Lim SC. A Comparative Study of Stability After the Installation of 2 Different Surface Types of Implants in the Maxillae of Dogs. IMPLANT DENT 2015; 24:586-91. [PMID: 26076390 DOI: 10.1097/id.0000000000000292] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
PURPOSE This study was performed to investigate the histologic and histomorphometric findings of 2 different types of implant. MATERIALS AND METHODS Resorbable blasting media (RBM) and sandblasted with larger grit and acid etched (SLA) surfaced implants (24 fixtures in each group) were installed in posterior maxilla of dogs. The initial stability was measured using Periotest (Periotest value [PTV]). After 6 or 12 weeks, fixtures with surrounding bone were harvested. RESULTS The average initial stability of the SLA group (-1.71 ± 2.9) was higher than that of the RBM group (-1.25 ± 3.21), but there was no significant difference. The mean PTV of the RBM surface was higher than the SLA surface at 12 weeks. The average bone-implant contacts were 67.6% ± 16.0% at 6 weeks and 82.7% ± 8.6% at 12 weeks in the SLA group and 69.9% ± 17.6% at 6 weeks and 78.3% ± 9.2% at 12 weeks in the RBM group. CONCLUSION The SLA and resorbable blasting media (RBM) surface implants demonstrated good stabilities and healing processes of the surrounding bone in the posterior maxilla. Therefore, the two domestic implants could provide predictable clinical results.
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Affiliation(s)
- Jae-Hyung Im
- *Graduate Student, Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Republic of Korea. †Professor, Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Republic of Korea. ‡Assistant Professor, Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Republic of Korea. §Professor, Department of Pathology, School of Medicine, Chosun University, Gwangju, Republic of Korea
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