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이해준,최상묵,정종평,Lee, Hae-Joon,Choi, Sang-Mook,Chung, Chong-Pyoung 대한치주과학회 1993 Journal of Periodontal & Implant Science Vol.23 No.1
Refractory periodontitis manifest progressive attachment loss in a rapid and unrelenting manner regardless of the type or frequency of therapy applied. The purpose of this study was ta evaluate the relation between the level of cytokines in GCF and periodontopathic microflora with disease activity of refractory periodontitis. Selection of patients with refractory periodontitis (7 males, 3 females) were made by long term clinical observation including conventional clinical history and parameters. Teeth that showed pocket depth greater than 6mm were selected as sample teeth. Subjects were examined at baseline and after 3 months. Prior to baseline test, individual acrylic stent was fabricated. Reference grooves were made on each sample tooth site. Pocket depth and attachment loss were measured by Florida Probe. Gingival index was measured at 4 sites each sample teeth. Disease activity was defined as attachment loss of ${\ge}$ 2.1mm, as determined by sequential probing and tolerance method. The pattern and amount of alveolar bone resorption was observed with quantitative digital subtraction image processing radiography. Morphological analysis of subgingival bacteria was taken by phase contrast microscopy. Predominant cultivable bacterial distribution and frequency were compared between disease-active and disease-inactive site using immunofluorescence microscopy and selective microbial culturing. Levels of $interleukin-l{\beta}$, 2, 4, 6 and $TNF-{\alpha}$ in GCF and blood serum sample were quantified by ELISA. In active sites, P. intermedia was significantly increased to compare with inactive site. $IL-1{\beta}$, IL-2, IL-6 and $TNF-{\alpha}$ in GCF were increased in active sites and IL-2 in serum was increased in active patients significantly. Alveolar bone loss in active site was correlated with $IL-1{\beta}$, IL-2 in GCF. And loss of attachment in active site was correlated with IL-2 in GCF. These results demonstrate that IL-2 in serum, $IL-1{\beta}$, IL-2, IL-6 and $TNF-{\alpha}$ in GCF, P, intermedia might be used as possible predictors of disease activity in refractory periodontitis before it is clinically expressed as attachment loss and quantitative alveolar bone change.
이하형,이해준,김중현 ( Ha Hyoung Lee,Hae Joon Lee,Jung Hyun Kim ) 한국공업화학회 1996 공업화학 Vol.7 No.4
내한, 내열성이 우수한 실리콘 고분자를 합성하기 위하여 페닐기를 도입한 1,1-diphenyl-1-methyl-7-hydroxydodecamethylheptasiloxysilane을 합성하고 이의 물성을 연구하였다. 100∼800℃의 범위에서 TGA 분석을 시행한 결과 일반 polydimethylsiloxane에 비해 열적성질이 우수하였으며, -50∼-10℃ 범위에서 내한성을 측정한 결과 유동성을 유지하였다. 또한 실리콘 고무에 합성한 실리콘 고분자를 첨가한 결과 기계적 성질이 향상되었다. The phenyl modified silicone polymer, 1,1-diphenyl-l-methyl-7-hydroxydodecamethylheptasiloxysilane, was synthesized to prepare the silicone polymer with good cold-proof and heat-proof properties. From the TGA analysis in the range of 100∼800℃, the phenyl modified silicone polymer had good thermal properties than polydimethylsiloxane. And furthermore fluidity was maintained even below 0℃. Also, the silicone rubber blended with the phenyl modified silicone polymer had better mechanical properties than the silicone rubber.