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Sung-Ae Son(손성애),Hyeon-Cheol Kim(김현철),Bock Hur(허복),Hyo-Joung Seol(설효정),Yong-Hoon Kwon(권용훈),Hyung-Il Kim(김형일),Jeong-Kil Park(박정길) 대한치과재료학회 2012 대한치과재료학회지 Vol.39 No.1
본 연구는 silorane을 기질로 하는 복합레진에 있어 레진의 두께에 따라 중합률과 미세경도에 미치는 영향을 비교, 평가하고자 하였다. methacrylate 기질의 복합레진 (Z250, Z350; 3M ESPE, St. Paul, MN, USA)과 Silorane 기질의 복합레진 (P90; 3M ESPE)을 대상으로 각각 1, 2, 3 ㎜ 두께의 시편을 제작 하였다. 각 시편의 미세경도는 Vickers hardness tester를 사용하여 200-gf 의 하중을 15초간 가한 후 측정하였고 각 시편의 중합률 측정을 위해 FTIR 분광분석기를 사용하여 중합 전후의 스펙트럼을 기록한 후, 측정값을 ANOVA와 Turkey test로 분석하고 이들의 상관관계를 분석하여 다음과 같은 결과를 얻었다. 복합레진의 기질과 관계없이 모든 레진 시편은 두께가 두꺼워질수록 중합률, 미세경도는 직선적인 감소를 나타내었다(p < 0.05). 중합률, 미세경도 간에는 선형적 상관관계를 나타내었다. Silorane 기질의 복합레진은 낮은 필러함양으로 높은 중합률을 보임에도 낮은 미세경도를 보였다.
Sung-Ae Son(손성애),Wan-Ky Park(박완기),In-Soo Lee(이인수),Bock Hur(허복),Hyung-Il Kim(김형일),Yong-Hoon Kwon(권용훈),Jeong-Kil Park(박정길) 대한치과재료학회 2012 대한치과재료학회지 Vol.39 No.1
본 연구는 최근 소개된 자가 접착 저점도 레진인 Dyad flow의 법랑질 및 상아질의 치면 전처리여부에 따른 미세인장결합강도를 비교 연구하였다. 본 실험을 위해 24개의 상하악 대구치를 치면의 전처리방법에 따라 8개의 군으로 나누었다. E1,D1군은 치면의 전처리과정없이, E2군은 인산처리, D2군은 conditioning, E3,D3군에서는 Optibond All-in-one, E4,D4군에서는 Clearfil SE bond로 치면의 전처리 과정을 시행한 이후 각각 Dyad flow를 적층 충전하였다(E군; 법랑질군, D군; 상아질군). 24시간 동안 실온의 증류수에 보관한 후 각 그룹당 15개의 시편을 준비하였다. 모든 시편의 미세인장결합강도와 파절양상를 측정하여 다음의 결과를 얻었다. 제조회사의 지시에 따라 Dyad flow만을 적용한 E1군과 D1군에서는 시편을 제작하는 과정에서 모두 파절되어 미세인장결합강도를 측정할 수 없었다. 법랑질 표면 처리방법에 따른 시편의 미세인장결합강도는 E2군이 가장 낮은 값을, E3군이 가장 높은 값을 나타냈으며, E2군은 E3군과 E4군에 대하여 유의하게 낮은 값을 나타내었다(p<0.05). 상아질 표면 처리방법에 따른 시편의 미세인장결합강도는 D2군이 가장 낮은 값을, D3군이 가장 높은 값을 나타냈으며, D2군은 D3군과 D4군에 대하여 유의하게 낮은 값을 나타내었다(p<0.05). 파절양상은 대부분 접착성 파절을 보였고 일부는 응집성파절을 보였다.
Kwon, Oh Chan,Lee, Sang-Won,Park, Yong-Beom,Oh, Ji Seon,Lee, Sang Hoon,Hong, Seokchan,Lee, Chang-Keun,Yoo, Bin,Kim, Yong-Gil BioMed Central 2018 ARTHRITIS RESEARCH AND THERAPY Vol.20 No.-
<P><B>Background</B></P><P>Takayasu arteritis (TAK) is a systemic disease characterized by large vessel involvement. Although the vascular characteristics of TAK are well characterized, there is no well-organized study demonstrating the extravascular manifestations of TAK. We aimed to evaluate the characteristics of extravascular manifestations of TAK, and to identify the association between vascular and extravascular manifestations of TAK.</P><P><B>Methods</B></P><P>TAK patients from two independent cohorts between January 2012 and October 2017 were included in the study. Patient characteristics were retrospectively collected from the electronic dataset. The computed tomography scans of all subjects were reviewed to evaluate the pattern of vascular involvement and presence of sacroiliitis. Clinical findings including uveitis, skin lesions, oral ulcers, arthritis, and inflammatory bowel disease (IBD) were reviewed. Logistic regression analysis was performed to evaluate the association between vascular and extravascular manifestations.</P><P><B>Results</B></P><P>For the 268 TAK patients, the mean age at diagnosis was 41.2 ± 14.2 years and 88.1% were female. The extravascular manifestation of TAK was observed in 19.0% of patients, the most common being arthritis including sacroiliitis (11.9%) followed by recurrent oral ulcers (8.6%) and IBD (2.6%). A multivariate logistic regression analysis revealed type IIB vascular involvement (adjusted odds ratio (OR) 2.956, 95% confidence interval (CI) 1.337–6.537, <I>p</I> = 0.007) and the erythrocyte sedimentation rate (ESR) (adjusted OR 1.014, 95% CI 1.003–1.025, <I>p</I> = 0.012) as significantly associated with the presence of axial and peripheral arthritis.</P><P><B>Conclusions</B></P><P>Extravascular manifestations of TAK were observed in up to one-fifth of patients. The most common extravascular manifestation was arthritis, which was associated with a type IIB vascular involvement pattern and a high ESR.</P>
( Sang Hyun Song ),( Choon Hyuck David Kwon ),( Jae Won Joh ),( Jong Man Kim ),( Mill Jae Shin ),( Sung Joo Kim ),( Suk Koo Lee ),( Tae Suk Kim ),( Hyung Hwan Moon ),( Sang Hoon Lee ) 대한간학회 2012 춘·추계 학술대회 (KASL) Vol.2012 No.-
Background: Portal vein thrombosis (PVT) is a surgical challenge in liver transplantation (LTx). Presence of PVT was considered as a contraindication for LTx in some centers due to the controversy revolving around the long term outcome of these patients. Therefore, we studied the long term outcome of adult patients with PVT in LTx in a tertiary institution with specialized transplantation unit. Methods: There were 570 cases of adult liver transplantation between 2004 and 2009 in our institution. We excluded 99 cases of deceased donor liver transplantations to facilitate incidence, outcome and surgical management. There were 56 patients with existing PVT before 471 living donor liver transplantations. Patients with PVT were divided into 2 groups according to Yerdal`s classification, mild PVT group (Yerdel group 1 & 2) 43 cases and severe PVT group (Yerdel group 3 & 4) 13 cases. Results: Patients with PVT constituted 11.8% (n=56) in our cohort. When comparing between patients without and with PVT, we did not find statistical difference in terms of age, gender, Child-Pugh score, MELD score & indication for LTx (benign vs malignancy). Rate of PV complication was 3.4% in the non-PVT group and 8.9% in PVT group (p=0.047). Duration of operation and total amount of blood transfusion were also comparable between two groups. The overall survival of PVT group was not significantly different compared to the non-PVT group (p=0.059). Demographics of 43 cases of mild PVT (76.7%) and 13 cases of severe PVT (23.3%) were not different except in severe PVT group had more malignancy cases (27 cases vs 2 cases, p=0.011). The median overall survival of mild PVT group is comparable with non-PVT group (p=0.059) and the median overall survival of severe PVT group is 32 months (1-88) and non-PVT group is 41 months (1-93) (p=0.066). 5-year survival rate of severe PVT is about 60%. Conclusions: Existing PVT prior to liver transplantation does not lead to poorer long term outcome. However in severe cases, we need more careful approach. Therefore, PVT should not be a contraindication to liver transplantation.