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Open and Closed Mouth Impression Techniques for Mandibular Implant Overdenture: Two Cases Report
윤하진,배정윤 대한치의학회 2022 Journal of korean dental science Vol.15 No.2
Mandibular implant overdenture is a good treatment option for complete edentulous patients with restoring removable prosthesis. Mandibular implant overdenture with two implants and locator attachments is widely used. It is tissue-supported overdenture that is made with the concept of conventional complete denture fabrication. There are two patients who provided impressions by open mouth technique and closed mouth technique in each case. In both cases, mandibular implant overdentures were restored with functionally and aesthetically satisfying results.
이지나,최소영,나종욱,윤하진,장유신 한국생물공학회 2014 KSBB Journal Vol.29 No.6
Production of biodegradable polymer polyhydroxyalkanoates(PHAs) from industrial wastes exhibits severaladvantages such as recycle of waste and the production ofhigh valuable products. To this end, this study aimed at isolatingfrom the sewage treatment plant a PHA producing bacteriumcapable of utilizing wastes generated from biodiesel andfood industries. A Bacillus cereus strain capable of producingpoly(3-hydroxybutyrate) [P(3HB)] was isolated, which wasfollowed by confirmation of P(3HB) accumulation by gaschromatographicanalyses. Then, the effects of nutrient limitationon P(3HB) production by B. cereus was first examined. Cells cultured in a minimal medium under the limitation of nitrogen,potassium and sulfur suggested that nitrogen limitationallows the highest P(3HB) accumulation. Next, production ofP(3HB) was examined from both waste of biodiesel production(crude glycerol) and waste from food industry (spent coffeegrounds). Cells cultured in nitrogen-limited minimalmedium supplemented crude glycerol and waste spent coffeegrounds extract accumulated P(3HB) to the contents of 2.4%and 1.0% of DCW. This is the first report demonstrating thecapability of B. cereus to produce P(3HB) from waste rawmaterials such as crude glycerol and spent coffee grounds.