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구취유발세균에 대한 $NANOVER^{TM}$의 항균효과 검사 1. Nanosilver가 구취 세균의 증식에 미치는 영향
정영희,모혜원,정지숙,최경호,최재갑,허윤경,이상흔,Jung, Young-Hee,Mo, Hye-Won,Jeong, Ji-Suk,Choi, Kyung-Ho,Choi, Jae-Kap,Hur, Yun-Kyung,Lee, Sang-Heun 대한안면통증구강내과학회 2009 Journal of Oral Medicine and Pain Vol.34 No.1
Recently there is much interest in the antibacterial activity of nano-sized silver particle (nanosilver) since silver is known to be safe and effective as disinfectant for a long time. Oral malodor is considered to originate in the oral cavity primarily as a result of production of malodorous compounds by oral bacteria. Major compounds responsible for oral malodor are volatile sulfur compounds, which is thought to be generated by the G(-) anaerobic bacteria found normally in the oral cavity, especially on the dorsum of the tongue. The purposes of this study were to investigate the effect of nanosilver on growth of oral malodor generating microorganisms, including Fusobacterium nucleatum, Prevotella melaninogenica, Klebsiella pneumonia, and to determine the optimal culture condition of them. The results were as follows: 1. The optimal culture condition for P. melaninogenica was vacuum culture using desiccator after evacuation of air by vacuum pump in chopped beef meat media. 2. The growth of K. pneumonia was temporarily inhibited by nanosilver (5 ppm and 10 ppm). 3. The morphological alteration and cell damage caused by nanosilver were observed in K. pneumonia.
이명진(Myoung Jin Lee),허명진(Myung Jin Huh),정행임(Heang Im Joeng),이상흔(Sang Hean Lee) 한국언어치료학회 2009 言語治療硏究 Vol.18 No.4
Very young children with overly profound hearing loss have cochlear implantation in their infant years. But, there is a great difficulty in analysing auditory performance effects, because of their young age. The aim of this study is to compare in three main areas results obtained through IT-MAIS questionnaire evaluations. The subjects, sixteen young children with an average age of 22 months with profound hearing loss, were selected for the study. IT-MAIS questionnaires were given to the parents of these children and performed pre and post-operatively. IT-MAIS scores showed auditory performance increased in terms of periods of cochlear implant use and attached significance to one year of experience with cochlear implant. Vocalization behavior and spontaneous alerting to sound increased at three months of experience with cochlear implant and deriving meaning from sound was increased at six months of experience with cochlear implant.In conclusion, auditory performance saw a steep improvement at six months of experience with cochlear implant and vocalization behavior, spontaneous alerting to sound, and deriving meaning from sound development order followed the general development procedure.