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유지놀 처리된 상아질 표면의 상아질 접착제의 전단결합강도에 관한 연구
유화성,최경규,최기운,박상진 대한치과보존학회 2000 Restorative Dentistry & Endodontics Vol.25 No.4
In this study, shear bond strength of two bonding systems were measured and appearance of dentin surfaces were observed with SEM according to the storage time of eugenol on dentin surface, thus evaluated the effect of eugenol on bond strength of two dentin bonding systems. Control groups were directly bonded to dentin surface with One Step, Prime & Bond 2.1. Experimental groups were divided into experimental I and II according to dentin bonding agents. After eugenol application, dentin surfaces were bonded with One Step and Prime & Bond 2.1 according to the each storage time of immediately, 3min, 24hour, 48hour and 1week, and then control and experimental groups were filled with light cured composite resin(Z-100). After 24 hours water storage at 37℃, all samples were subjected to a shear load to fracture at a cross head 1.0mm/min with Instron universal testing machine(No. 4467) . Etched dentin surface storaged for each time of immediately, 3min, 24hour, 48hour and 1week after eugenol application were observed under Scanning Electron Microscope(Hitachi S-2300) at 20kvp. The data were evaluated statistically with two-way ANOVA and Tukey's HSD. The results were as follows; 1.Shear bond strengths were higher in control groups than in the experimental groups. 2.As storage time was increased after eugenol application, the shear bond strengths were decreased in experimental groups 3.In experimental I, II the shear bond strengths were the lowest in which storage time was 1week after eugenol application. 4.As storage time was increased after eugenol application, etched dentin surfaces showed obstructed dentinal tubule.
Primary intraosseous squamous cell carcinoma mimicking periapical disease: a case report
Choi, Yoon-Joo,Oh, Song-Hee,Kang, Ju-Han,Choi, Hwa-Young,Kim, Gyu-Tae,Yu, Jae-Jung,Choi, Yong-Suk,Hwang, Eui-Hwan Korean Academy of Oral and Maxillofacial Radiology 2012 Imaging Science in Dentistry Vol.42 No.4
Primary intraosseous squamous cell carcinoma (PIOSCC) is a rare carcinoma, which arises within the jaws without connection to the oral mucosa and presumably develops from a remnant of odontogenic epithelium. We present a case of solid type PIOSCC in a 52-year-old male patient complaining of dull pain on his left lower molar. In this case, early stage PIOSCC mimicking a periapical lesion might lead to a one-year delay in treatment due to the misdiagnosis of osteomyelitis after extraction of the third molar. The clinical, radiological, and histologic features are described. In this case, there was initial radiographic evidence for PIOSCC mimicking a periapical lesion. Incautious radiographic interpretation and treatment procedures had delayed the correct diagnosis and resulted in extensive bony destruction during the patient's disease progression.
Cisplatin의 세포독성에 대한 레몬밤 추출물의 억제 효과
최유선 ( Yu Sun Choi ),김선주 ( Sun Ju Kim ),유영월 ( Yeong Wol Yu ),임요섭 ( Yo Sup Rim ),황은희 ( Eun Hee Hwang ),이화정 ( Hwa Jeong Lee ),최은영 ( Eun Young Choi ),장병수 ( Byung Soo Chang ),정인주 ( In Ju Jung ) 대한미용학회(구 대한미용과학회) 2013 대한미용학회지 Vol.9 No.1
The purpose of this study is to evaluate the protective effect of Lemon balm (Mellisa officinalis) extract on the cytotoxicity induced by cisplatin, pharmaceutic alopecia inducer. To achieve this, cisplatin-induced cytotoxicity was assessed by XTT assay after human skin fibroblasts (Detroit 551) were cultured in media containing various concentrations of cisplatin. And also, the effect of vitamin E was examined on the cisplatin-induced cytotoxicity. For the protective effect of Lemon balm extract on cisplatin-induced cytotoxicity, Detroit 551 cells were pretreated with 80 or 100 μg/mL of Lemon balm extract for 2 hours, and also, antioxidative effects of Lemon balm extract such as 1,1-diphenyl-2-picrylhydrazyl (DPPH)-radical scavenging activity and lactate dehydrogenase (LDH) activity were analysed. The results were as follows. Cisplatin showed a significant decrease of cell viability in dose dependently, and the XTT50 value was calculated at 25.7 μM. In the effect of vitamin E, it significantly increased cell viability which were decreased by the cisplatin-induced cytotoxicity. In the protective effect of Lemon balm extract on cisplatin-induced cytotoxicity, it significantly increased cell viability which was decreased by cisplatin-induced cytotoxicity, and also it showed the DPPH-radical scavenging activity and LDH inhibitory activity. Therefore, these results suggested that the cytotoxicity of cisplatin may be involved in oxidative stress, and also, Lemon balm extract effectively prevented the cytotoxicity induced by cisplatin via antioxidative effect. Conclusively, the natural extract like Lemon balm may be useful for the development as antioxidative agent via the prevention of the cytotoxicity induced by pharmaceutic alopesia inducer correlated with oxidative stress.
이유화 ( Yu Hwa Lee ),태혜진 ( Hye Jin Tae ),김진옥 ( Jin Ok Kim ),최정임 ( Jeong Im Choi ),김동찬 ( Dong Chan Kim ),손원 ( Won Sohn ),최호순 ( Ho Soon Choi ) 대한내과학회 2012 대한내과학회지 Vol.83 No.6
Autoimmune pancreatitis (AIP) is type of chronic pancreatitis characterized by an autoimmune inflammatory process. IgG4-positive plasma cells can be found in both the pancreas and at extrapancreatic sites of involvement. A 60-year-old man presented with abdominal discomfort. Computed tomography revealed enlargement of the pancreas and kidneys as well as low-attenuated lesions in both kidneys. MRCP showed narrowing of the distal common bile duct and the proximal pancreatic duct. The serum IgG level was elevated, but IgG4 was normal. Histologic examination revealed lymphoplasma infiltration in the renal tubulointerstitium associated with fibrosis along with many IgG4-positive plasma cells, thereby confirming the diagnosis of tubulointerstitial nephritis-associated AIP. The abnormalities in the clinical, laboratory, and radiological findings improved after oral steroid treatment. This is a case of autoimmune pancreatitis accompanied by tubulointerstitial nephritis diagnosed by renal biopsy. Clinicians should suspect the possibility of extrapancreatic organ involvement in autoimmune pancreatitis, especially when abnormalities in other organs are suggested. Proper examinations must be performed. (Korean J Med 2012;83:775-780)
한국 연안해역에 출현하는 황돔(Dentex tumifrons)의 성숙과 산란
최유정 ( Yu Jeong Choi ),최정화 ( Jung Hwa Choi ),이해원 ( Hae Won Lee ),정재묵 ( Jae Mook Jeong ),김현지 ( Hyeon Ji Kim ),김도균 ( Do-gyun Kim ),진수연 ( Suyeon Jin ),백근욱 ( Gun Wook Baeck ) 한국수산과학회(구 한국수산학회) 2020 한국수산과학회지 Vol.53 No.1
In this study, we examined the maturation and spawning of yellowback seabream Dentex tumifrons using samples collected by monthly bottom trawling in Korean coastal waters from January to December 2018. We analyzed monthly changes in gonadosomatic index (GSI), maturity stage, histology, fecundity, and total length at group maturity. Spawning occurred in May and October. Fecundity varied with total length as F=1.3754TL<sup>3.2664</sup>, with a range of 1,220 to 155,625 eggs per female. At group maturity, 50%, 75%, and 97.5% estimates of female total length were 18.4, 20.5, and 25.3 cm, respectively.