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Flowable 및 microfill 복합레진으로 충전된 제 5급와동에서 load cycling 전,후의 미세변연누출 비교
강석호,김오영,오명환,조병훈,엄정문,권혁춘,손호현 大韓齒科保存學會 2002 Restorative Dentistry & Endodontics Vol.27 No.2
Low-viscosity composite resins may produce better sealed margins than stiffer compositions (KempScholte and Davidson, 1988; Crim, 1989). Flowable composites have been recommended for use in Class V cavities but it is also controversial because of its high rates of shrinkage. On the other hand, in the study comparing elastic moduli and leakage, the microfil had the least leakage (Rundle et al. 1997). Furthermore, in the 1996 survey of the Reality Editorial Team, microfills were the clear choice for abfraction lesions. The purpose of this study was to evaluate the microleakage of 6 composite resins (2 hybrids, 2 microfills, and 2 flowable composites) with and without load cycling. Notch-shaped Class V cavities were prepared on buccal surface of 180 extracted human upper premolars on cementum margin. The teeth were randomly divided into non-load cycling group (group 1) and load cycling group(group 2) of 90 teeth each. The experimental teeth of each group were randomly divided into 6 subgroups of 15 samples. All preparations were etched, and Single bond was applied. Preparations were restored with the following materials (n=15) : hybrid composite resin [Z250(3M Dental Products Inc. St.Paul, USA), Denfil(Vericom, Ahnyang, Korea)], microfil [Heliomolar RO(Vivadent, Schaan, Liechtenstein), Micronew(Bisco Inc. Schaumburg, IL, USA)], and flowable composite[AeliteFlo(Bisco Inc. Schaumburg, IL, USA), Revolution(Kerr Corp. Orange, CA, USA)]. Teeth of group 2 were subjected to occlusal load (100N for 50,000 cycles) using chewing simulator(MTS 858 Mini Bionix Ⅱ system, MTS Systems Corp., Minn, USA). All samples were coated with nail polish 1mm short of the restoration, placed in 2% methylene blue for 24 hours, and sectioned with a diamond wheel. Enamel and dentin/cementum margins were analyzed for microleakage on a sclale of 0 (no leakage) to 3 (3/3 of wall). Results were statistically analyzed by Kruskal-Wallis One way analysis, Mann-Whitney U-test, and Student-Newmann-Keuls method. (p=0.05) Results: 1. There was significantly less microleage in enamel margins than dentinal margins of all groups. (p<0.05) 2. There was no significant difference between six composite resin in enamel margin of group 1. 3. In dentin margin of group 1, flowable composite had more microleakage than others but not of significant differences. 4. There was no significant difference between six composite resin in enamel margin of group 2. 5. In dentin margin of group 2, the microleakage were R>A=H=M>D>Z. But there was no significant differences. 6. In enamel margins, load cycling did not affect the marginal microleakage in significant degree. 7. In dentin margins, load cycling did affect the marginal microleakage only in Revolution. (p<0.05)
( Young Hwa Cho ),( Mi Jung Um ),( Suk Jin Kim ),( Soo Ah Kim ),( Hyuk Jung ) 대한폐경학회 2016 대한폐경학회지 Vol.22 No.3
Objectives: To evaluate the efficacy of raloxifene in preventing bone loss associated with long term gonadotropin-releasing hormone agonist (GnRH-a) administration. Methods: Twenty-two premenopausal women with severe endometriosis were treated with leuprolide acetate depot at a dosage of 3.75 mg/4 weeks, for 48 weeks. Bone mineral density (BMD) was evaluated at admission, and after 12 treatment cycles. Results: At cycle 12 of GnRH-a plus raloxifene treatment, lumbar spine, trochanter femoral neck, and Ward`s BMD differed from before the treatment. A year after treatment, the lumbar spine and trochanter decreased slightly, but were not significantly different. Conclusions: Our study shows that the administration of GnRH-a plus raloxifene in pre-menopausal women with severe endometriosis, is an effective long-term treatment to prevent bone loss. (J Menopausal Med 2016;22:174-179)
Effects of filler addition to bonding agents on shear bond strength
Oh, Young,Oh, Myung-Hwan,Cho, Byeong-Hoon,Son, Ho-Hyun,Kwon, Hyuk-Choon,Um, Chung-Moon 大韓齒科保存學會 2002 Restorative Dentistry & Endodontics Vol.27 No.1
목적 최근 개발된 bonding agent 중 일부는 다양한 함량의 filler를 포함하고 있으며 filler의 첨가는 bonding agent의 기계적인 물성을 향상시킴으로써 접착력의 향상에 기여한다는 주장이 있다. 본 연구에서는 다양한 함량의 filler를 포함한 adhesive를 실험적으로 만들어, filler의 함량이 전단접착강도에 미치는 영향을 살펴보고 임상적으로 가장 적절한 filler의 함량을 알아보고자 하였다. 또 adhesive의 간접인장정도를 측정하여 adhesive의 기계적인 물성과 접착력과의 상관관계를 알아보았다. 방법 발거된 건전한 70개의 대구치를 투명 레진에 매몰하고 상아질면을 노출시켰다. 3M사의 Scotchbond Multipurpose의 etchant와 primer를 제조사의 지시대로 적용하고 1㎛크기의 barium glass filler를 0, 5, 10, 15, 20, 30, 45wt% 포함하도록 실험적으로 제작한 adhesive 를 도포한 후 레진을 충전하여 시편을 완성하였다. Instron으로 0.5mm/min의 속도에서 전단접착강도를 측정하고 그 단면을 입체현미경으로 관찰하여 파절의 양상을 확인하였다. Filler함량에 따른 adhesive의 후경을 측정하기 위해 상기한 방법으로 시편을 제작하여 주사 전자현미경으로 관찰한 후 Sigmascan을 이용하여 그 후경을 측정하였다. 또, 지름 4mm 높이 6mm의 원통형 시편을 제작하여 Instron으로 간접인장강도의 측정을 시행하였다. 얻어진 결과는 Kruskal-Wallits test와 Mann-Whitney test를 시행하여 분석하였으며, 상관관계분석을 위해 Pearson Product Moment Correlation Coefficient를 구하였다. 결과 1) Filler함유량에 따라 전단접착강도는 유의할 만한 차이를 보였다.(p<0.05). 2. Filler함량의 증가에 따라 전단접착강도는 유의하게 증가하여 15% 수준에서 가장 높은 값(19.9±1.38Mpa)을 보였으며 20% 이상의 수준에서는 유의하게 감소하였다.(p<0.05). 3) Adhesive의 간접인장강도는 20% 수준까지는 증가하는 양상을 보였으나 통계적 유의성은 없었으며(p>0.05). 30% 이상에서는 유의할 만한 감소를 보였다(p<0.05). 4) Adhesive의 후경은 0% 수준에서 5.97±1.23㎛qnxj 45% tnwnsdptj 73.37±11.7㎛까지 유의하게 증가하였다(p<0.05). 5) Filler함량에 따른 Adhesive의 간접인장강도와 전단접착강도는 상관관계가 없었다.
Dietary Fat Intake and the Risk of Metabolic Syndrome in Korean Adults
Yoo-Jin Um,Seung-Won Oh,Cheol-Min Lee,Hyuk-Tae Kwon,Hee-Kyung Joh,Young-Ju Kim,Hyun-Joo Kim,Sang-Hyun Ahn 대한가정의학회 2015 Korean Journal of Family Medicine Vol.36 No.5
Background: The effect of dietary fat intake on the risk of cardiovascular disease remains unclear. We investigated the association between dietary fat and specific types of fat intake and the risk of metabolic syndrome. Methods: The study population included 1,662 healthy adults who were 50.2 years of age and had no known hypertension, diabetes, hyperlipidemia, or metabolic syndrome at the initial visit. Dietary intake was obtained from a 1-day food record. During 20.7 months of follow-up, we documented 147 cases of metabolic syndrome confirmed by self-report, anthropometric data, and blood test results. The intakes of total fat, vegetable fat, animal fat, saturated fatty acid (SFA), polyunsaturated fatty acid (PUFA), monounsaturated fatty acid (MUFA), and cholesterol level divided by quintile. Multivariate analyses included age, sex, body mass index, smoking status, alcohol intake, physical activity, total calorie, and protein intake. Results: Vegetable fat intake was inversely associated with metabolic syndrome risk (odds ratio for the highest vs. the lowest quintile, 0.33; 95% confidence interval, 0.14 to 0.76). Total fat, animal fat, SFA, PUFA, MUFA, and cholesterol intakes showed no association with metabolic syndrome. Vegetable fat intake was inversely associated with the risk of hypertriglyceridemia among the components of metabolic syndrome. Conclusion: These data support an inverse association between vegetable fat and the risk of metabolic syndrome.
오상영(Sang-Young Oh),김형준(Hyoung-June Kim),오혁산(Hyuk-San Oh),신현호(Hyun-Ho Sin),김영웅(Young-Woong Kim),김현흠(Hyung-um Kim),김순태(Soon-Tae Kim) 한국산학기술학회 2014 한국산학기술학회 학술대회 Vol.- No.-
본 논문에서는 30명 내외의 소기업형 개인별 성과 측정을 위한 측정지표 설계를 제안 함. 특히 인사 관리를 위한 인사평가지표를 포함하여 성과측정과 인사평가를 동시에 반영하는 지표를 개발 함.
자궁근종이 있는 여성에서 자궁근종용해술 전후 성기능과 임상 증상에 대한 연구
최은영 ( Eun Young Choi ),엄미정 ( Mi Jung Um ),김수아 ( Soo Ah Kim ),정혁 ( Hyuk Jung ) 대한산부인과학회 2011 Obstetrics & Gynecology Science Vol.54 No.9
목적: 자궁근종이 있는 환자에서 고주파 자궁근종용해술 후 성기능과 임상 증상의 개선 여부를 알아보고자 하였다. 연구방법: 조선대학교 산부인과에서 고주파 자궁근종용해술을 시행 받은 54명의 환자들에서 수술 전과 6개월 후의 성기능과 임상 증상에 대해 설문조사 하였다. 결과: 고주파 자궁근종용해술 후 성교통, 생리통, 월경과다, 복부 통증, 복부 압박, 허리 통증, 다리 통증, 빈뇨 등의 임상 증상이 통계적으로 의의있게 개선되었으며, 자궁근종의 크기도 평균 4.41.6 cm 감소하였다(P = 0.043). 그러나 성욕, 성교 횟수, 오르가즘 빈도, 오르가즘 강도는 고주파 자궁근종용해술 전 후 큰 차이가 없었다. 결론: 고주파 자궁근종용해술은 성 기능에 영향을 미치지 않으면서 자궁근종의 임상 증상을 개선시키고 근종의 크기를 줄일 수 있는 효과적인 시술이다. Objective: The purpose of this study was to estimate sexual functioning and clinical symptoms after radiofrequency (RF) myolysis of uterine myomas. Methods: Fifty-four patients who had undergone RF myolysis in the Department of Obstetrics and Gynecology at Chosun University Hospital were surveyed regarding changes in the number, diameter, volume of myomas, sexual functioning and clinical symptoms before and 6 months after the procedure. Results: The mean age of the patients was 43 ± 4.048 years. The following clinical symptoms (dysmenorrhea, menorrhagia, abdominal pain, dyspareunia, pelvic pressure, back pain, urinary frequency and leg pain) were improved significantly 6 months after RF myolysis (P < 0.001). The results following parameters of sexual function (desire for sex, frequency of sex, frequency of orgasm and strength of orgasm) were no signifi cant differences before and after RF myolysis. The diameter and volume of myomas were significantly reduced 6 months after than before RF myolysis (P < 0.05). Conclusion: RF myolysis is effective in improvement of clinical symptoms without an influence on sexual functioning and reduction of myoma size.