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펄프 섬유의 형태학적 특성이 국부적 폐쇄공간 내 종이 지합에 미치는 영향
박신영(Shin Young Park),박희태(Heetae Park),신종현(Jonghyun Shin),현진호(Jin-Ho Hyun),윤혜정(Hye Jung Youn) 한국펄프·종이공학회 2018 펄프.종이기술 Vol.50 No.2
Effect of morphological properties of four kinds of pulp fibers (Hw-BKP, Sw-BKP, BCTMP, and mulberry fiber) on sheet formation manufactured in a local closed place was investigated. According to the fiber analysis, BCTMP had the shortest fiber length followed by Hw-BKP, Sw-BKP, and mulberry fiber. The sediment concentration and critical concentration obtained from crowding factor of the pulp increased as the fiber length decreased, which means longer fibers can flocculate at relatively lower concentration. The formation of the sheet became even as the fiber length and the pulp concentration decreased although the sheets of Sw-BKP and mulberry fiber showed poor formation in all conditions. Shaking usually had a positive effect on the sheet formation, but severe shaking rather worsened the formation of the sheet in some cases. When carboxymethylated cellulose nanofibrils (CM-CNF) was added, sheet showed more uniform formation.
신종현(Jonghyun Shin) 대한치과의사협회 2022 대한치과의사협회지 Vol.60 No.6
The most common malocclusion presented during primary dentition are anterior crossbite and deep overbite. If the primary dentition does not show severe skeletal discrepancy, it is possible to treat malocclusion using pre-fabricated myofunctional appliance that is easily applied to children. By improving the malocclusion in the primary dentition, normalization of the oral muscle function can be induced. In addition, the normal occlusion of the primary incisor region and ideal position of the lips can make a desirable occlusal relationship at the transition of incisors. If factors such as growth pattern, patient cooperation, and post-treatment maintenance are carefully judged and implemented, the interceptive treatment of primary dentition can contribute to normal growth and development.