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건강한 한국 성인에서 경구개와 상악결절 부위 저작점막의 두께 측정
조익현,박정미,장문택,김형섭,김현철,Cho, Ik-Hyun,Park, Jung-Mi,Chang, Moon-Taek,Kim, Hyung-Seop,Kim, Hyun-Chul 대한치주과학회 2001 Journal of Periodontal & Implant Science Vol.31 No.3
The aim of present study was to assess the thickness of masticatory mucosa on the hard palate and tuberosity as a potential donor site for mucogingival surgery. Thickness measurement was performed in 30 dental college students who are periodontally healthy, with a recently developed, ultrasonic device(SDM). The mean age of study subjects was 23.7(range 21-29) years old and the subjects were composed of 18 males and 12 females. Eighteen standard measurement points were defined on the hard palate, located on 3 lines which ran at different distances parallel to the gingival margin. Six positions were designated on each of these 3 lines between the level of the canine and the second molar. On the tuberosity, 6 standard measurement points were defined, located on 2 lines running parallel to the gingival margin at different distances. Data were analyzed to determine differences in gender, between different positions, and between lines, by an analysis of variance. The results showed that the mucosa of the tuberosity was significantly thicker than that of the hard palate region. Gender did not influence the thickness of masticatory mucosa, either on the hard palate or the tuberosity. On the hard palate, mucosa thickness increased as the distance from the marginal gingiva increased. The mucosa over the palatal root of the maxillary first molar was significantly thinner than that at all other positions on the hard palate. Measurement error at palate was 0.25mm, at tuberosity 0.51mm. No difference in the thickness of masticatory mucosa on palate and tuberosity was found between men and women. On the hard palate, soft tissue thickness progressively increased in sites further from the gingival margin. Therefore, we may harvest more thicker graft on the tuberosity that has more masticatory mucosa thickness than hard palate, however the width may not be sufficient for using.
Full mouth disinfection therapy의 단기간 임상 효과 연구
조익현,정의원,차정헌,김중수,이대실,김창성,김종관,최성호,Cho, Ik-Hyun,Jung, Ui-Won,Cha, Jeong-Heon,Kim, Joong-Su,Lee, Dae-Sil,Kim, Chang-Seong,Kim, Chong-Kwan,Choi, Seong-Ho 대한치주과학회 2005 Journal of Periodontal & Implant Science Vol.35 No.3
The aim of this study is to determine whether full-mouth disinfection therapy(FMT) in our clinical setting would show better improvement of clinical parameters than partial mouth disinfection therapy(PMT) in chronic periodontitis and aggressive periodontitis patients. Among 12 patients, 6 were treated FMT and other 6 were treated PMT. Clinical parameters were calculated 3 months and 6 months after initial therapy. 1. There were no statistically significant differences between FMT and PMT in the reduction rate of bleeding on probing after 3 months, 6 months 2. Initial probing depth was 4-6mm, the mean probing depth after 3 months was 2.2mm vs 2.5mm(FMT vs PMT), after 6 months was 2.4mm vs 2.8mm. This was significantly lower in the FMT groups. 3. Initial probing depth was ${\geqq}$ 7mm, the reduction rate of mean probing depth during first 3 months was 4.8mm vs 4.1mm(FMT vs PMT), and 3 to 6 months was 0.5mm vs 0.3mm. This was significantly larger in the FMT groups. 4. Initial probing depth was 4-6mm, the mean clinical attachment level after 3 months was 2.3mm vs 2.7mm(FMT vs PMT), after 6 months was 2.7mm vs 3.0mm. This was significantly lower in the FMT groups. 5. Initial probing depth was ${\geqq}$ 7mm, the reduction rate of mean probing depth during first 3 months was 4.0mm vs 3.0mm(FMT vs PMT), and 3 to 6 months was 0mm vs -0.1mm. This was significantly larger in the FMT groups. Although the results provided us with succeccful clinical improvement in aggressive periodontitis, further research is needed to prove its additional benefit in the treatment of chronic periodontitis
스마트 기기와 Wi-Fi 인프라를 이용한 실내 측위 시스템
조익현,황태규,김대호,홍지만,Cho, Eighyun,Hwang, Taegyu,Kim, Daeho,Hong, Jiman 한국스마트미디어학회 2015 스마트미디어저널 Vol.4 No.2
최근 다양한 스마트 기기가 보급화 됨에 따라 스마트 기기를 이용한 실내 위치추적 기술 연구 또한 활발히 진행되고 있다. 하지만 실내 위치추적 기술은 GPS 센서 없이 실내의 위치를 추적해야 한다는 제약 사항이 있다. 본 논문에서는 별도의 인프라 구축이 필요 없고 오차범위가 작은 실내위치추적 기법을 제안한다. 제안 기법은 기존 실내 측위를 위한 기법 중 걸음검출, Wi-Fi 핑거프린팅 기법들의 장단점이 서로 상호보완적 이라는 점에서 착안하였다. 제안하는 기법은 걸음검출을 통해 사용자의 변위를 측정하며 이를 보정하기 위해 Wi-Fi 핑거프린팅 기법을 혼합 형태로 사용한다. 본 논문에서는 실험을 통해 제안하는 기법의 유효성을 입증하고 실용화 가능성을 보인다. Recently, research on indoor locating techniques using smart device sensors has been conducted actively, Owing to the exponential increase in the use of various smart devices. However, in order to develop indoor location techniques, there are limitations due to the requirement that the tracking system has to function without GPS. In this paper, we propose an accurate indoor locating system that does not require additional infrastructure. The proposed scheme is developed based on the idea that the advantages and disadvantages of "Wi-Fi Fingerprinting" and "Step Detection" techniques are complementary. In the proposed scheme, we track users with "Step Detection," and correct errors with "Wi-Fi Fingerprinting." In this paper, we demonstrate the effectiveness and feasibility of our proposed scheme through experiments.
S-65 : AIMS65 score는 소화궤양 출혈 환자의 경과 예측에 유용한가?
조익현,정성훈,오정환,이혜연,유찬란,전은정,최상욱 대한내과학회 2013 대한내과학회 추계학술대회 Vol.2013 No.1
배경: AIMS65 score는 상부 위장관 출혈 환자들의 치료 결과를 예측하고자 고안되었다. 하지만 현재까지 소화궤양 출혈의 예후 파악에 대한 효용성은 확실하지 않다. 연구 목적: 본 연구는 소화궤양 출혈 환자들의 임상 경과 예측에 AIMS65 score를 적용할 수 있을지에 대해서 평가하고자 한다. 방법: 단일 기관에서 시행한 후향성 연구로 2003년 1월부터 2011년 12월까지 상부 위장관 출혈로 응급실로 내원한 총 522명의 환자를 대상으로 하였다. 첫 내시경 시행 30일 이내로 재출혈을 하였거나 응급실 방문 30일 이내 사망한 환자들은 고위험군으로 분류하였다. 522명 중 소화궤양 출혈 환자인 149명의 내원 당시 자료를 바탕으로 AIMS65 score를 적용하여 고위험군인 환자를 예측할 수 있었는지 후향적으로 통계 분석하였다. 결과: 연구기간 동안 응급실을 방문한 소화궤양 출혈 환자 총 149명을 분석하였다. 치료 결과가 좋았던 환자 군은 121명, 결과가 좋지 않았던 환자 군은 28명이었으며 결과가 좋았던 환자 군에 비해 좋지 않았던 환자 군에서 평균 혈청 알부민 수치가 소폭 낮았다(p값=0.072). 한편, AIMS65 score는 소화궤양 출혈 환자의 결과를 예측하는 데 불충분하다는 것을 확인하였다(곡선하면적 0.571, 신뢰도 95%, 0.49-0.65). 결론: 본 연구 결과, AIMS65 score는 소화궤양 출혈 환자의 임상경과 예측에 사용하기에는 부적합한 것으로 보인다. 단, 낮은 혈청 알부민 수치는 소화궤양 출혈에서 높은 사망률과 연관된 위험요인으로 작용할 수 있다.