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가변 광도 중합에 따른 복합레진의 중합수축에 관한 연구
임미영,조경모,홍찬의 대한치과보존학회 2007 Restorative Dentistry & Endodontics Vol.32 No.1
본 연구는 광중합형 복합레진 중합 시 기존의 중합법과 가변광도 중합형인 soft start 중합법 및 exponential 중합법 간의 중합수축효과를 비교하고자 하였다. 본 연구를 위해 3종의 복합레진 (Synergy Duo Shade, Z250, Filtek Supreme) 및 3종의 광조사기 (Spectrum 800, Elipar Highlight, Elipar Trilight)를 사용하였다. 총 중합시간은 40초로 일정하게 유지하였으며, 선형 중합수축률의 측정은 linometer를 이용하였으며, 90초간의 선형 수축률을 0.5초 간격으로 측정하였다. 재료별로 각 중합 방법별 시간에 따른 중합수축률을 one-way ANOVA test로 분석하여 최종 중합수축률에 도달하는 시간을 산출하였고, 90초 후 최종 선형 중합수축률을 two-way ANOVA test를 이용하여 재료, 광조사 방법, 재료 및 광조사 방법의 교호작용이 중합수축에 미치는 영향이 있는지를 검증하였다. 또한 90초까지의 선형 중합수축률에 대한 20초까지의 선형 중합수축률의 비를 two-way ANOVA로 비교하고, 각각의 통계치를 95% Scheffe test로 검증하였는바, 다음과 같은 결과를 얻었다. 1. Supreme을 제외한 다른 군에서는 재료 및 광조사 방법에 관계없이 대부분의 중합 수축이 광조사 후 20초 이내에 이루어졌다 (p < 0.05). 2. 90초 후, 최종 중합수축률은 재료 (p = 0.000)와 광조사 방법 (p = 0.003) 모두 유의성 있는 영향을 끼쳤으나, 재료와 광조사 방법 상호간의 작용은 영향이 없었다. 3. 90초 후 최종 중합수축률은 총 광에너지가 가장 낮은 exponential 중합법에서 유의성 있게 낮았다 (p < 0.05). 4. 20초까지의 초기 수축률은 soft start와 exponential 중합법 등 가변광도 중합이 conventional 중합법에 비하여 유의성 있게 낮은 수축률을 보였다 (p < 0.05). 본 실험 결과만을 토대로 볼 때, 가변광도 중합법은 초기 중합수축 속도를 감소시켜 수축응력을 감소시킨다고 볼 수 있다. 그러나 총 조사 광에너지의 차이로 인해 그 물리적 성질에 영향이 있을 수 있으므로 향후 이에 대한 더 많은 고찰이 필요할 것으로 사료된다. The purpose of this study was to compare the effect of exponential curing method with conventional curing and soft start curing method on polymerization shrinkage of composite resins. Three brands of composite resins (Synergy Duo Shade, Z250, Filtek Supreme) and three brands of light curing units (Spectrum 800, Elipar Highlight, Elipar Trilight) were used. 40 seconds curing time was given. The shrinkage was measured using linometer for 90 seconds. The effect of time on polymerization shrinkage was analysed by one-way ANOVA and the effect of curing modes and materials on polymerization shrinkage at the time of 90s were analysed by two-way ANOVA. The shrinkage ratios at the time of 20s to 90s were taken and analysed the same way. The results were as follows: 1. All the groups except Supreme shrank almost within 20s. Supreme cured by soft start and exponential curing had no further shrinkage after 30s (p < 0.05). 2. Statistical analysis revealed that polymerization shrinkage varied among materials (p = 0.000) and curing modes (p = 0.003). There was no significant interaction between material and curing mode. 3. The groups cured by exponential curing showed the statistically lower polymerization shrinkage at 90s than the groups cured by conventional curing and soft start curing (p < 0.05). 4. The initial shrinkage ratios of soft start and exponential curing were statistically lower than conventional curing (p < 0.05). From this study, the use of low initial light intensities may reduce the polymerization rate and, as a result, reduce the stress of polymerization shrinkage.
수종의 엔진구동형 Nickel-Titanium file을 이용한 근관형성 방법이 근관만곡도 유지능력에 미치는 영향
이철환,조경모,홍찬의 大韓齒科保存學會 2003 Restorative Dentistry & Endodontics Vol.28 No.1
There are increasing usage of Nickel-Titanium rotary files in modern clinical endodontic treatment because it is effective and fater than hand filing due to reduced step. This study was conducted to evaluate the effect of canal preparations using 3 different rotary Nickel-Titanium files that has different cross sectional shape and taper on the maintenance of canal curvature. Simulated resin block were instrumented with Profile(Dentsply, USA), GT rotary files(Dentsply, USA), Hero 642(Micro-Mega, France), and Pro-Taper(Dentsply, USA). The image of Pre-instrumentation and Post-instrumentation were acquired using digital camera and overspreaded in the computer. Then the total differences of canal diameter, deviation at the outer portion of curvature, deviation at the inner portion of curvature, movement of center of the canal and the centering ratio at the pre-determined level from the apex were measured. Results were statistically analyzed by means of ANOVA, followed by Scheffe test at a significance level of 0.05. The results were as follows; 1. Deviation at the outer portion of curvature, deviation at the inner portion of curvature were showed largest in Pro-Taper, so also did in the total differences of canal diameter(p<0.05). 2. All the groups showed movements of center. Profile combined with GT rotary files and Hero 642 has no difference but Pro-Taper showed the most deviation(p<0.05). 3. At the 1, 2, 3mm level from the apex movements of center directed toward the outer portion of curvature, but in 4, 5 mm level directed toward the inner portion of curvature(p<0.05). As a results of this study, it could be concluded that combined use of other Nickel-Titanium rotary files is strongly recommended when use Pro-Taper file because it could be remove too much canal structure and also made more deviation of canal curvature than others.
한의진단명과 진단요건의 표준화 연구 III : 3차년도 연구결과 보고
최선미,양기상,최승훈,박경모,박종현,심범상,김성우,노석선,이인선,정진홍,이진용,김달래,임형호,김윤범,박성식,송태원,김종우,이승기,최윤정,신순식 한국한의학연구원 1997 한국한의학연구원논문집 Vol.3 No.1
The diagnostic requirements were suggested and explained regarding the systems of differentiation of symptoms and signs in the third year study of standardization and unification of the terms and conditions used for diagnosis in oriental medicine. The systems were as follows : - analyzing and differentiating of epidemic febrile disease - analyzing and differentiating in accordance with the Sasang constitution medicine based on four-type recognition - differentiation of disease according to pathological changes of Chong and Ren channels - standards for diagnosis of women's disease - standards for diagnosis of children's disease - standards for diagnosis of motor and sensor disturbance (-muscle. born, joint, etc.) - standards for diagnosis of neuropsychiatric disease - standards for diagnosis of five sense organ disease - standards for diagnosis of external disease The indivisual diagnosis pattern was arranged by the diagnostic requirements in the following order : another name, notion of diagnosis pattern, index of differentiation of symptoms and signs, the main point of diagnosis, analysis of diagnosis pattern, discrimination of diagnosis pattern, prognosis, a way of curing a disease, prescription, herbs in common use, disease appearing the diagnosis pattern, documents. The standards for diagnosis of each disease was arranged by the diagnostic requirements in the following order : another name, notion of disease, the main point of diagnosis, analyzing and differentiating of disease, analysis of disease, discrimination of disease, prognosis, a way of curing and prescription of disease, disease in western medicine appearing the disease in oriental medicine, documents.
장언량,박영훈,염창홍,서국웅,이경순,강영택,양충모 釜山大學校 附設 體育科學硏究所 2004 體育科學硏究所 論文集 Vol.20 No.-
Of the fencing club members at D university in B city, the four skilled members and the 4 unskilled members were selected. The MVC of the left brachioradialis, right brachioradialis and left flexor carpi radialis, right flexor carpi radialis each was measured in each group according to the striking directions as they act 'striking left right head'......
( Kyung Soo Hong ),( June Hong Ahn ),( Kwan Ho Lee ),( Jin Hong Chung ),( Kyeong Cheol Shin ),( Eun Young Choi ),( Hyun Jung Jin ),( Jong Geol Jang ),( Eun Ji Kim ),( Jin Mo Cho ) 대한결핵 및 호흡기학회 2021 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.129 No.-
Purpose Larger size (≥20mm) of peripheral pulmonary lesions (PPLs) is associated with increased diagnostic yield of radial probe endobronchial ultrasound transbronchial lung biopsy (RP-EBUS-TBLB). However, the utility of RP-EBUS-TBLB for PPLs diagnosed as primary lung cancer smaller than 20mm remains unknown. We investigated the utility of RP-EBUS-TBLB in peripheral lung cancer smaller than 20mm. Method We retrospectively reviewed data from 131 patients who underwent RP-EBUS for PPLs diagnosed as primary lung cancer smaller than 20mm from January 2019 to December 2020 at Yeungnam University Hospital. TBLB were performed using RP-EBUS with a guide-sheath without fluoroscopy. We analyzed the patient characteristics, chest computed tomography (CT), complications, molecular anaysis and diagnostics yield. Multivariable logistic regression analyses were used to identify diagnostic factors in small primary lung cancer. Result Of the 131 primary lung cancers, 90 PPLs were definitely diagnosed using RP-EBUS-TBLB. The overall diagnostic accuracy was 68.7% (90/131). In multivariable analysis, within the lesion of the probe (odds ratio [OR], 8.63; 95% confidence interval [CI], 3.33- 22.33; p < 0.001), distance from pleura ( > 10mm, OR, 3.76; 95% CI, 1.52-9.27; p = 0.004) and solid lesions (OR, 3.35; 95% CI, 1.52- 9.27; p = 0.011) were associated with diagnostic success. However, bronchus sign on chest CT (p = 0.213) was not associated with diagnostic success. Pneumothorax, and hemoptysis occurred in 3.1% (4/131), and 1.5% (2/131) of the patients. The specimens obtained for molercular confirmation of malignancy were satisfactory. Conclusion RP-EBUS-TBLB with a guide sheath without fluoroscopy can be considered as a diagnostic method in patients with small (≤ 20mm) PPLs who can be diagnosed as primary lung cancer. Within the lesion of the probe, distance from pleura (> 10mm) and solid lesions were crucial for diagnostic success. Complication rates were acceptable.
( Hong Joo Lee ),( Young Mo Kang ),( Eun Lee ),( Byum Jin Jeong ),( Young Jun Jo ),( Ji Seok Seong ),( Yong Moon Woo ),( Kyung Hwan Jeong ) 대한류마티스학회 2016 대한류마티스학회지 Vol.23 No.2
A 73-year-old female with diabetes admitted for treatment of an intertrochanter fracture of the femur and a urinary tract infection (UTI) with Escherichia coli developed thrombosis in her right azygos vein, which was thought to be associated with antiphospholipid and immunoglobulin M anticardiolipin antibodies. After antibiotic therapy, antiphospholipid antibody was undetectable, and a repeat chest computed tomography showed complete resolution of the azygos vein thrombosis. A wide variety of infections can be associated with thrombotic events in patients with transient antiphospholipid syndrome (APS), and this case serves as a reminder that the possibility of transient APS should be considered in patients with venous thrombosis in the setting of a UTI. (J Rheum Dis 2016;23:118-121)
Kyung Min Ahn,Seung Mo Kang,Seon Hong Moon,HyukSang Kwon,Byung Tae Ahn 한국태양광발전학회 2013 Current Photovoltaic Research Vol.1 No.2
Epitaxial growth of a high-quality thin Si film is essential for the application to low-cost thin-film Si solar cells. A polycrystalline Si film was grown on a SiO2 substrate at 450°C by a Al-assisted crystal growth process. For the purpose, a thin Al layer was deposited on the SiO2 substrate for Al-assisted crystal growth. However, the epitaxial growth of Si film resulted in a rough surface with humps. Then, we introduced a thin amorphous Si seed layer on the Al film to minimize the initial roughness of Si film. With the help of the Si seed layer, the surface of the epitaxial Si film was smooth and the crystallinity of the Si film was much improved. The grain size of the 1.5-μm-thick Si film was as large as 1 mm. The Al content in the Si film was 3.7% and the hole concentration was estimated to be 3 × 10<SUP>17</SUP> /cm<SUP>3</SUP>, which was one order of magnitude higher than desirable value for Si base layer. The results suggest that Al-doped Si layer could be use as a seed layer for additional epitaxial growth of intrinsic or boron-doped Si layer because the Al-doped Si layer has large grains.