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치과용 콘빔 CT를 이용한 상악 정중과잉치의 3차원 분석
이동호,이재서,윤숙자,강병철,Lee, Dong-Ho,Lee, Jea-Seo,Yoon, Suk-Ja,Kang, Byung-Cheol 대한영상치의학회 2010 Imaging Science in Dentistry Vol.40 No.3
Purpose : This study was performed to analyze the position, pattern of impacted mesiodens, and their relationship to the adjacent teeth using Dental cone-beam CT. Materials and Methods : Sixty-two dental cone-beam CT images with 81 impacted mesiodenses were selected from about 2,298 cone-beam CT images at Chonnam National University Dental Hospital from June 2006 to March 2009. The position, pattern, shape of impacted mesiodenses and their complications were analyzed in cone-beam CT including 3D images. Results : The sex ratio (M : F) was 2.9 : 1. Most of the mesiodenses (87.7%) were located at palatal side to the incisors. 79% of the mesiodenses were conical in shape. 60.5% of the mesiodenses were inverted, 21% normal erupting direction, and 18.5% transverse direction. The complications due to the presence of mesiodenses were none in 43.5%, diastema in 19.4%, tooth displacement in 17.7%, delayed eruption or impaction in 12.9%, tooth rotation in 4.8%, and dentigerous cyst in 1.7%. Conclusions : Dental cone-beam CT images with 3D provided 3-dimensional perception of mesiodens to the neighboring teeth. This results would be helpful for management of the impacted mesiodens.
이동호,이승관,이창규 高麗大學校 倂設 保健大學 保健科學硏究所 2003 保健科學論集 Vol.29 No.2
Random amplified polymorphic DNA (RAPD) is widely used technique for genetic fingerprinting, but the practical applications of such markers are enhanced by sequencing the RAPD products and converting them more specific SCAR (sequence-characterized amplified region) markers. We describe on efficient method for directly sequencing purified gels which containing RAPD fragments amplified by using one primer from a set of four 3'-terminal extended oligo nucleotides, which is called direct oligonucleotide extension sequencing(DOES). Several RAPD bands were converted into dominant SCAR markers by direct sequencing, which is avoiding the costly and time consuming cloning step. We have used this technology to develop SCAR markers useful for identifying the beef breeds(Korean cattle beef, Imported beef).