성견 열개형 결손부에 DFDB이식과 Dura Mater막의 효과

최성호,김일영,김영희,서종진,정현철,조규성,채중규,Choi, Seong-Ho,Kim, Il-Young,Kim, Young-Hee,Suh, Jong-Jin,Jung, Hyun-Chul,Cho, Kyoo-Sung,Chai, Jung-Kiu 대한치주과학회 1998 Journal of Periodontal & Implant Science Vol.28 No.2

The present study invetigates the effects of root planing only(control group), DFDBA alone(test group 1) and combined use of DFDB and Dura mater(test group 2) in dehiscence defects in dogs. The results of 8weeks post-surgery by histological comparison between the three groups are as follows. 1. The contol group showed minimum regeneration of new cementum and new bone with limited migration of epitheilal cells, and healed by connective tissue attachment. 2. The test group 1 showed minimum regeneration of new cementum and new bone with limited migration of epitheilal cells, and healed by connective tissue attachment. 3. The test group 2 showed significant amount of the new cementum and new bone. 4. Both control and test groups healed without any observable root resorption and ankylosis. The above the results suggest that the use of resorbable Dura mater only does not improve the regeneration of new bone and periodontal ligament due to difficulties of space making, but the combined use with DFDB may be more effective.

1996년도 제35차 대한소화기학회 추계학술대회 / 일반연제 : 간 ; 나병환자에서 Hepatitis C Virus 의 감염양상

최성호,정미혜,이선호 ( Seong Ho Choi,Mi Hye Jeong,Seon Ho Lee ) 대한소화기학회 1996 대한소화기학회지 Vol.28 No.1

치과병원 치주과 내원환자와 일반인간의 치주상태에 대한 통계학적 비교연구

최성호,채중규,김종관,Choi, Seong-Ho,Chai, Jung-Kui,Kim, Chong-Kwan 대한치주과학회 1987 Journal of Periodontal & Implant Science Vol.17 No.1

성인성 치주질환에서 미노클린 국소송달제 효과에 대한 연구

최성호,현석주,구현서,서종진,조규성,채중규,김종관,Choi, Seong-Ho,Hyun, Suk-Ju,Koo, Hyun-Seo,Suh, Jong-Jin,Cho, Kyoo-Sung,Chai, Jung-Kui,Kim, Chong-Kwan 대한치주과학회 1998 Journal of Periodontal & Implant Science Vol.28 No.2

20 Subjects with clinical diagnosis of adult periodontitis with sites having average pocket depth of 4mm were selected for the study. After scaling and root planing of those sites, 30% minocycline-HCI contained in biodegradable device were inserted in one group, scaling and root planing was carried out in another group and the last group was without any periodontal treatment. the difference between the group was detemined by pocket dept, bleeding on prbing, attachment level, distribution of subgingval plaque bacteria. Conclusion was made for the comparisons between baseline and 4 week and the groups. 1. In analysis of pocket depth, there was significant sifference in scaling and root planing group only. 2. Both the scaling and root planing group and minocycline group showed significant decrease in bleeding on probing. 3. There was significant increase in the attachment level in scaling and root planing group, but no difference was foundbetween the groups. 4. There was significant decrease in the total number of subgingival bacteria in all groups and the number of motile bacteria decreased significantly in the minocycline group. These result indicate that insertion of Minocycline-HCI at the base of periodntal pocket was useful as an additional aid of mechanical trarment at the point of periodontal pocket, bleeding on probing, attachment level, microbial distribution.

성견 열개형 수평 결손부에서 Calcium Sulfate 차단막이 치주조직 치유에 미치는 영향

최성호,조규성,문익상,채중규,김종관,Choi, Seong-Ho,Cho, Kyu-Sung,Moon, Ik-Sang,Chai, Jung-Kyu,Kim, Jong-Kwan 대한치주과학회 1997 Journal of Periodontal & Implant Science Vol.27 No.1

The present study investigates the effects of calcium sulfate graft on the periodontal healing in intrabony periodontal defects of dogs. Following the general anesthesia with 30mg/kg pentobarbital injected intravenously, the first premolar was extracted and full-thickness periodontal flap was elevated from the second premolar to the fourth premolar. The portion of premolars coronal to the alveolar crest was removed and mesial and distal roots were separated. Exposed root canals were sealed with Caviton and covered completely with flaps sutured. Following the healing period of 12 weeks, the surgical sited were uncovered and $4{\times}4mm$ intrabony defects were surgically created. Those defects with calcium sulfate graft following the root planing was designated as the test sites and those with flap surgery-only were designated as control sites. The animals were sacrificed after 8 weeks and the healing was histologically analyzed. The results were as follows. 1. No foreign body reaction or inflammation were observed in either groups. Calcium sulfate was completely resorbed in the test sites. 2. New cementum was observed coronal to the notch in both groups. Connective tissue fibers were oriented parallel to the root surface in the controls. Connective tissues were formed in large amount in the sites. 3. Test sites showed marked amount of new bone formation while the control sites showed minimal bone gain. 4. Root resorption was observed in coronal portions of th control Sites. The results suggest that calcium sulfate is a biocompatible graft material with a potential for new bone and cementum formation.

성견 1면 치조골 결손부에서 $Emdogain^{(R)}$과 $Emdogain^{(R)}$ 및 특수 제조된 Calcium Sulfate Paste 혼합물이 치주조직 치유에 미치는 영향

최성호,김창성,서종진,김현영,김정혜,조규성,김종관,Choi, Seong-Ho,Kim, Chang-Sung,Suh, Jong-Jin,Kim, Hyun-Young,Kim, Jeong-Hye,Cho, Kyoo-Sung,Kim, Chong-Kwan 대한치주과학회 2000 Journal of Periodontal & Implant Science Vol.30 No.3

Recently, it was reported that enamel matrix derivative may be beneficial in periodontal regeneration procedures in expectation of promoting new bone and cementum formation. The aim of present study was to evaluate the effect of enamel matrix derivative($Emdogain^?$)and Caso4 sulfate paste in 1-wall intrabony defects in beagle dogs. Surgically created 1-wall intrabony defects were randomly assigned to receive root debridement alone or $Emdogain^{(R)}$ or $Emdogain^{(R)}$ and Caso4. Clinical defect size was 4 X 4mm. The control group was treated with root debridement alone,and Experimental group I was treated with enamel matrix derivative application, and Experimental group II was treated with enamel matrix derivative and Caso4 sulfate paste application,. The healing processes were histologically and histometrically observed after 8 weeks and the results were as follows: 1. The length of junctional epithelium was $0.41{\pm}0.01mm$ in the control group, $0.42{\pm}0.08mm$in the experimental group I and $0.50{\pm}0.13mm$in the experimental group II. 2. The connective tissue adhesion was $0.28{\pm}0.02mm$ in the control group, $0.13{\pm}0.08mm$ in the experimental group I and $0.19{\pm}0.02mm$ in the experimental group II. 3. The new cementum formation was $3.80{\pm}0.06mm$ in the control group, $4.12{\pm}0.43mm$ in the experimental group I and $4.34{\pm}0.71mm$ in the experimental group II. 4. The new bone formation was $1.43{\pm}0.03mm$ in the control group, $1.53{\pm}0.47mm$ in the experimental group I and $2.25{\pm}1.35mm$ in the experimental group II. Although there was limitation to present study, the use of enamel matrix derivative in the treatment of periodontal 1-wall intrabony defect enhanced new cementum and bone formation. Caso4 sulfate paste will be the candidate for carriers to deliver enamel matrix derivative, and so enhance the regenerative potency of enamel matrix derivative.

위성 보험

최성호,Choi, Seong-Ho 한국위성정보통신학회 2008 위성통신과 우주산업 Vol.15 No.1

성견 3급 분지부 병소에서 Dura mater와 $Guidor^{(R)}$사용후 치주조직 치유의 비교 연구

최성호,구현서,정현철,조규성,채중규,김종관,Choi, Seong-Ho,Koo, Hyun-Seo,Jung, Hyun-Chul,Cho, Kyoo-Sung,Chai, Jung-Kiu,Kim, Chong-Kwan 대한치주과학회 1997 Journal of Periodontal & Implant Science Vol.27 No.3

There are various treatment methods including barrier membranes in attaining periodontal regeneration and regaining the function of destructed periodontal tissues due to periodontal disease. Barrier membranes consist of non-Resorbable and resorbable types such as Dura mater and $Guidor^{(R)}$ used in the treatment of intrabony defects and classII furcation defects have been shown to be effectively increased the amount of new bone and cementum.In our study we used premolars with class III furcation defects created by removing the bone 4mm apically from CEJ in adult dogs and placed resorbable membrane Dura mater and $Guidor^{(R)}$ for the test group and flap operation was carried out for the control groups. The effect of membrane on junctional epithelium, alveloar bone, cementum, and gingival connective tisssue in the regeneration and healing potential of periodontal tissues was evaluated and healing results were evaluated histologically and histometrically 8 weeks following the surgical procedure. 1. In the clinical observation, there was no exposure of furcation defects in the control group, whereas slight membrane exposure was noted in the test group. 2. New bone was formed up to the level of the notch in the control group, whereas in the test group new bone formation was observed above the level of the notch. 3. New cementum was formed in both groups of the experiment. 4. The connective tissue observed between the new cementum and new bone in the test group were functionally orientated, compared to the irregular formation of connective tissues found in the control group. 5. Root resorption or ankylosis was not observed in any of the groups 6. The mean and median of the control group were 4.31% and 2.23% and for the Dura mater group were 27.85% and 15.57% respectively. There was no significant difference between Dura mater and the control group. 7. The mean and median of the control group were 4.31% and 2.23% and for the $Guidor^{(R)}$ group were 37.27% and 37.19% respectively. There was a significant difference in these two groups(P<O.05). 8. The mean and median of the Dura mater group were 27.85% and 15.57% and for the $Guidor^{(R)}$ were 37.27% and 37.19%. There was no significant difference between the two test groups. Thus, by using Dura mater and Guidor in classIII furcation defects, the predictable amount of periodontal ligament and alveolar bone regeneration may result.

국외 의료기기 보안위협 사례 및 보안 동향 조사

최성호,곽진,Choi, Seong-Ho,Kwak, Jin 한국정보보호학회 2015 情報保護學會誌 Vol.25 No.3

정보시스템 산업의 발전은 다양한 서비스 분야에서 많은 편의성을 증가시키고 있다. 또한, IT 산업이 IoT 환경으로 집중됨에 따라 다양한 서비스가 개발 되고 있으며, 다양한 IoT 제품들은 의료기기를 포함한다, 의료 환경에서는 네트워크에 연결되는 의료기기를 통해 환자를 위한 다양한 건강관리 서비스, 생명유지 서비스 등을 제공할 수 있다. 그러나 의료기기에 대한 보안 위협이 부각되면서, 인명 피해로 확산되는 것을 막기 위한 보안 관리 체계가 필요한 실정이다. 따라서, 본 논문에서는 의료기기에 대한 보안 현황을 조사하기 위해 의료기기 관련 보안 위협 사례를 분석하고, 미국, 유럽, 일본의 의료기기 정보보호 대책 및 국제 표준화 현황을 분석한다.

연령, 시점, 세대 효과가 주택담보대출자의 소비에 미치는 영향

최성호(Seong Ho Choi),허윤경(Youn Kyoung Hur) 한국주택학회 2016 주택연구 Vol.24 No.1

본 연구는 차주단위 주택담보대출 자료를 기반으로 연령, 시점, 세대 모형을 구축하고 소비에 미치는 개별 효과를 실증적으로 분석하였다. 연령, 시점, 세대간 존재하는 완벽한 선형관계를 다루기 위하여, APC-IE모형을 실증분석 모형으로 선택하였다. 주요 실증분석 결과는 다음과 같다. 첫째, 소비에 미치는 세대 효과의 존재를 통계적으로 확인하였다. 이는 주택가격, 소득 등 통제변수를 포함한 상황에서 연령, 시점, 세대효과를 동시에 결정하였다는 점에서 의미를 가진다. 세대 효과는 연령 효과와 달리 소득과 주택가격 등 주택가격 등 통제 변수에 영향을 적게 받는다. 추정된 세대 효과의 계수값은 최근 탄생한 세대로 올수록 줄어들고 있는 것으로 나타나고 있다. 둘째, 연령 효과가 세대 및 시점 효과보다 크게 나타났다. 따라서 고령화 사회에 진입하면서 주택담보대출자의 소비는 연령 효과에 의해 크게 영향을 받을 것으로 판단된다. 셋째, 최근의 베이비부머의 소비 감소 우려가 크며 이는 연령 증가에 기인하는 바가 크다. 따라서 향후 경제 성장(시점 효과)이 고령화 사회의 부정적인 효과를 충분히 상쇄시키지 않는 한, 전반적인 소비 감소는 경제전반에 상당한 파급효과를 지닐 것으로 판단된다. This paper aims to analyze age, period, and cohort effects on mortgage borrower's consumption. Although great attention has been shown to the question of age, period, and cohort effects on mortgage market, the perfect multicollinearity between age, period, and cohort factors disturbs a comprehensive understanding of age, period, and cohort effects on mortgage market. Base on mortgage borrower's data over the period 2008-2014, an age-period-cohort intrinsic estimator (APC-IE) is implemented. The empirical results are as followings. First, age, period, and cohort effects on consumption is simultaneously identified with statistical significance, and coefficients of recent generation's cohort effect are smaller than the previous generation's. This statistical result is interpreted as that recent generation has lower propensity of consumption than the previous generation. Second, both cohort and period effects on consumption are less sensitive than age effect, while the model consists of additional independent variables, such as income, housing price, and borrower's social and financial status. This represents that age effect is a more important factor than period and cohort to forecast mortgage borrower's consumption at aging society. Third, baby boomer's consumption is expected to decrease, mainly due to the age and cohort effects. The results suggest that the aging process could lead to the decreasing consumption of mortgage borrower, unless economic growth is not sufficient to mitigate negative effects on aging process.