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새롭게 개발된 치아청결기의 치태제거 및 치은염증에 대한 효과
한동관,방은경,김창성,최성호,조규성,채중규,김종관,Han, Dong-Kwan,Pang, Eun-Kyung,Kim, Chan-Sung,Choi, Seong-Ho,Cho, Kyoo-Sung,Chai, Jung-Kiu,Kim, Chong-Kwan 대한치주과학회 2003 Journal of Periodontal & Implant Science Vol.33 No.3
Many tooth cleansing instruments and agents have been developed for removal of plaque, inhibition of plaque formation and reduction of gingival inflammation. The aim of this study was to evaluate the plaque control effect and the therapeutic effect of newly developed tooth cleansing instrument(Belloblanco(R)). 40 healthy subjects with gingivitis or early periodontitis were divided into two groups. Subjects in control group only used manual tooth brushing and in experimental group used manual tooth brush and additive tooth cleansing instrument(Belloblanco(R)). Additive tooth cleansing instrument was used once a week. At baseline scaling and tooth brushing instruction was performed. Probing depth, bleeding on probing, plaque index, gingival index were scored at baseline, 2weeks, 4weeks. Probing depth of control and experimental group were significantly reduced at 2 weeks, 4weeks, hut there were no differences between two groups(P<(0.05). Bleeding on probing, plaque index and gingival index of control and experimental group were significantly reduced at 2weeks and 4weeks and there was significantly more reduction in the experimental group than the experimental group than the control group(p<(0.05). From these finding. it can be conclude that newly developed tooth cleansing instrument(Belloblanco(R)) are effective on the removal of plaque and the reduction of gingival inflammation
박승학,김상형,한동관,김수진,김동원 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.0
Lithium-ion batteries (LIBs) are widely used as power sources in various fields due to their high energy density and long cycle life. However, poor performance of LIBs at low temperature limits their applications, and it is thus essential to improve the low temperature performance. One of the most important factor when designing liquid electrolytes for improving low temperature performance is a liquid range. Carbonate-based solvents commonly used in LIBs have high melting point, and it limits the low temperature performance. In this study, we investigate the electrochemical characteristics of LIBs with various electrolytes containing ester-based solvents, which exhibit higher capacity at low temperature than carbonate-based solvents. Analysis techniques of electrochemical impedance spectroscopy (EIS), X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM) have been implemented to understand the improvement of low temperature performance of LIBs.
calcium carbonate와 fibrin-fibronectin sealant system 혼합이식이 치주골내낭 치유에 미치는 영향
장수진,한동관,윤정호,정의원,김창성,최성호,조규성,김종관,채중규,Chang, Soo-Jin,Han, Dong-Kwan,Yun, Jeong-Ho,Jung, Ui-Won,Kim, Chang-Sung,Choi, Seong-Ho,Cho, Kyoo-Sung,Kim, Chong-Kwan,Chai, Jung-Kiu 대한치주과학회 2004 Journal of Periodontal & Implant Science Vol.34 No.3
Calcium carbonate(CC) is biocompatible and gradually absorb to be replaced by bone when implanted into bone tissue. Fibrin-fibronectin sealant system (FFSS) is a product of human-derived plasma. The effect is hemostasis, tissue fixation and adhesion, We expect synergic effects of this two materials in periodontal regeneration. When FFSS was grafted with bone graft in intrabony defects, could be eliminated exofolication of bone graft materials. This study evaluated above materials for periodontal regeneration of 6mm intrabony defects in 36 patients. lap surgery was carried in 14 defects of control group. experimental group 1 was 11 defects grafted with calcium carbonate, experimental group 2 was 11 defects which were grafted with calcium carbonate with FFSS. The clinical parameters evaluated included changes in attachment level, probing depth, gingival recession at 6 months. Postsurgery probing depth reduction was 3.1 ${\pm}$ 0.9mm in control, 3.8 ${\pm}$ 1.6mm in experimental group 1, 4.1 ${\pm}$ 1.1mm in experimental group 2. The result clinically and statistically improved compared to baseline(P<0.01), but the difference found among the groups were not statistically significant. Postsurgery clinical attachment level was 1.6 ${\pm}$ 1.2mm in control, 3.5 ${\pm}$ 2.0mm in experimental group 1, 3.3 ${\pm}$ 1.2mm in experimental group 2. All of the control and experimental groups resulted in a statistically significant reduction from baseline(P<0.01). The reduction of the experimental groups were statistically significant from control(P<0.05). But the change between experimental group 1 and experimental group 2 was not statistically significant. We conclude that mixture of CC and FFSS is effective to periodontal regeneration in intrabony defect.