치밀골 두께 변화에 따른 임플랜트 1차안정성과 즉시하중부담능 평가

이양진,박찬진,조리라,Yi Yang-Jin,Park Chan-Jin,Cho Lee-Ra 대한치과보철학회 2005 대한치과보철학회지 Vol.43 No.2

Statement of problem. Cortical bone plays an important role in the primary implant stability, which is essential to immediate/early loading. However, immediate load-bearing capacity and primary implant stability according to the change of the cortical bone thickness have not been reported. Purpose. The objectives of this study were (1) to measure the immediate load-bearing capacity of implant and primary implant stability according to the change of cortical bone thickness, and (2) to evaluate the correlation between them. Material and methods.48, screw-shaped implants (3.75 mm$\times$7 mm) were placed into bovine rib bone blocks with different upper cortical bone thickness (0-2.5 mm) and resonance frequency (RF) values were measured subsequently. After fastening of healing abutment. implants were subjected to a compressive load until tolerated micromotion threshold known for the osseointegration and load values at threshold were recorded. Thereafter, RF measurement after loading, CT taking and image analysis were performed serially to evaluate the cortical bone quality and quantity. Immediate load-bearing capacity and RF values were analyzed statistically with ANOVA and post-hoc method at 95% confidence level (P<0.05). Regression analysis and correlation test were also performed. Results. Existence and increase of cortical bone thickness increased the immediate load-bearing capacity and RF value (P<0.05) With the result of regression analysis, all parameter's of cortical bone thickness to immediate load-bearing capacity and resonance frequency showed significant positive values (P<0.0001). A significant high correlation was observed between the cortical bone thickness and immediate load-beating capacity (r=0.706, P<0.0001), between the cortical bone thickness and resonance frequency (r=0.753, P<0.0001) and between the immediate load-bearing capacity and resonance frequency (r=0.755, P<0.0001). Conclusion. In summary, cortical bone thickness change affected the immediate load-baring capacity and the RF value. Although RF analysis (RFA) is based on the measurement of implant/bone interfacial stiffness, when the implant is inserted stably, RFA is also considered to reflect implant/bone interfacial strength of immediately after placement from high correlation with the immediate load-baring capacity. RFA and measuring the cortical bone thickness with X-ray before and during surgery could be an effective diagnosis tool for the success of immediate loading of implant.

Prevalence of Immediate-Type Food Allergy in Early Childhood in Seoul

박미란,김지현,김도수,안강모,한영신 대한천식알레르기학회 2014 Allergy, Asthma & Immunology Research Vol.6 No.2

Purpose: There are scanty epidemiologic data on the prevalence of food allergy (FA) among preschool children in Asia. We performed this study todetermine the prevalence and causative foods of immediate-type FA in early childhood in Korea. Methods: A questionnaire-based, cross-sectionalstudy was performed between September and October 2011. Children aged 0-6 years were recruited from 301 public child care centers in Seoul. Parents were asked to complete a questionnaire on FA. Children with FA were classified into “perceived FA, ever,” “immediate-type FA, ever,” and“immediate-type FA, current” according to the algorithm. Results: A total of 16,749 children were included in this study. The prevalence of “perceivedFA, ever,” “immediate-type FA, ever,” and “immediate-type FA, current” was 15.1%, 7.0%, and 3.7%, respectively. “Immediate-type FA, current”was reported by 182 (4.9%) out of 3,738 children aged ≤2 years, 262 (3.4%) of 7,648 children aged 3-4 years, and 177 (3.3%) of 5,363 childrenaged 5-6 years. Hen’s egg (126/621) was the most frequent cause as the individual food item, followed by cow’s milk (82/621) and peanut (58/621). Among the food groups, fruits (114/621), tree nuts (90/621) and crustaceans (85/621) were the most common offending foods. The three leadingcauses of food-induced anaphylaxis were hen’s egg (22/47), cow’s milk (15/47), and peanut (14/47). Conclusions: The prevalence of immediatetypeFA in early childhood is 3.7%, and is higher in younger children. The most common offending foods differed with age.

학습 스트레스의 수준 및 제공되는 보상 조건의 차이가 단기 및 장기 기억의 수행에 미치는 영향

정주연 ( Ju Youn Jung ),한상훈 ( Sang Hoon Han ) 한국감성과학회 2012 감성과학 Vol.15 No.4

We examined the effect of delayed and immediate rewards on short- and long-term memory performance depending on the level of stress. It has been demonstrated that delaying feedback during memory tasks could lead to better retention than presenting it immediately (a.k.a., feedback delay benefit or delay-retention effect). In this study, we manipulated stress level(high-stress or low-stress), reward-timing(delayed or immediate reward), reward-existence(500 or 0 won) and retrieval-timing(delayed or immediate memory test), On the high-stress learning condition, one week later, the number of correct answers with delayed-rewards were significantly more than that of delayed-no-rewards but there was not any difference between immediate-rewards and immediate-no-rewards. On the other hand, in the high-stressful immediate memory test, immediate-rewards only had a positive effect on memory performance. The results indicated that delayed rewards improved long-term memory performance by promoting memory consolidation and the sensitivity to rewards was higher under the high-stress condition.

Prevalence of Immediate-Type Food Allergy in Korean Schoolchildren in 2015: A Nationwide, Population-based Study

김민지,이지영,전현영,양혜경,이기재,한영신,김양희,김지현,안강모 대한천식알레르기학회 2017 Allergy, Asthma & Immunology Research Vol.9 No.5

Purpose: This study aimed to determine the prevalence of immediate-type food allergy (FA) among schoolchildren in Korea. Methods: A nationwide, cross-sectional study was performed in September 2015. A stratified random sample of 50,000 participants was selected from children and adolescents aged 6-7 years (n=17,500), 9-10 years (n=17,500), 12-13 years (n=7,500), and 15-16 years (n=7,500). Parents were asked to complete a questionnaire on the detailed history of immediate-type FA. Results: A total of 32,001 (64.0%) responded to the questionnaire survey, and 29,842 children (59.7%) were analyzed after adjusting for missing data. The number of the cases in each age group was 9,671 (6-7 years), 9,756 (9-10 years), 5,169 (12-13 years), and 5,246 (15-16 years). The prevalence of lifetime perceived FA was 15.82%. The prevalence of current immediate-type FA was 4.06% in total, with 3.15% in 6- to 7-year-olds, 4.51% in 9- to 10-year-olds, 4.01% in 12- to13-year-olds, and 4.49% in 15- to 16-year-olds. Among individual food items, peanut (0.22%) was the most frequent causative food, followed by hen’s egg (0.21%), cow’s milk (0.18%), and buckwheat (0.13%). Among the food groups, fruits (1.41%), crustaceans (0.84%), tree nuts (0.32%), and fish (0.32%) were the most common offending foods. The prevalence of food-induced anaphylaxis was 0.97%. The most frequent causative food of anaphylaxis was peanut (0.08%), followed by cow’s milk (0.07%), buckwheat (0.06%), and hen’s egg (0.06%), while fruits (0.28%), crustaceans (0.18%), tree nuts (0.12%), and fish (0.09%) were the most commonly responsible food groups. Conclusions: The prevalence of current immediate-type FA and food-induced anaphylaxis in Korean schoolchildren in 2015 was 4.06% and 0.97%, respectively. Peanuts, cow’s milk, hen’s egg, fruits, crustaceans, and tree nuts are common allergens.

유도조직재생술에 의한 발치창의 골치유 및 즉시 임프란트 매식에 대한 임상적 연구

박광호 大韓顎顔面成形再建外科學會 1996 Maxillofacial Plastic Reconstructive Surgery Vol.18 No.2

Early implantation before sufficient ossification has taken place usually results in osseointegartion failure due to reduced bone-fixture interface area. However, various studies have shown successful osseointegration results following immediate implants concurrently with GTR. The clinical trends have been to shorten the patients' edentulous state by immediate implantation, and reduce the alveolar bone resorption. However, it may be difficult to attain the complete soft tissue coverage of the sites, increasing the chance of infection. Furthermore, there may be more studies needed on the clinical behaviors of e-PTFE membranes, various modofications in the membrane materials and bone graft materials. Various animal and clinical studies have been reported on the successful osseointagration following immediate implantation, but the long-term follow-up studies are limited. The present study investigated 16 immediately-implanted implants with GTR therapy with or without calcium carbonate grafting on 11 patients 3 years after installation and 24-30 months after functional loading. Based on the clinical, radiographic and histologic findings, the following results have been attained. 1. Clinically, stability has been shown on all 16 implants throughout the investigated periods. 2. Radiologically, the alveolar bone loss has progressed up to the polished neck portion but not beyond it, suggesting the progressive osseointegration from the GTR therapy. 3. The GTR method used in the present study is easy to use clinically, and may be appied in the regeneration of ossoeous defects around implants and in the immediate implantation. 4. The difficulty in complete tissue coverage may be avoided by delaying the installation for 2 to 3 weeks after the extraction allowing certain degree of soft tissue healing.

주요 알레르기질환의 진단과 치료 약물 알레르기의 진단

조영주 ( Young Joo Cho ) 대한내과학회 2009 대한내과학회지 Vol.76 No.3

Hypersensitivity reactions to drugs are classified as immediate or nonimmediate reactions depending on the basis of time of appearance of reactions. Clinical and immunological studies suggest that immediate reaction is IgE-mediated and nonimmediate as type-IV (cell-mediated) reaction. For the evaluation of drug allergy, the patient`s history is fundamental; the allergologic examination includes in-vivo and in-vitro tests selected on the basis of the clinical features. Prick, patch, and intradermal tests are the most readily available forms of allergy testing. However, there are some changes in the diagnostic evaluation of allergic reactions to beta-lactams, iodinated contrast media and local anaesthetics over the last several years. In immediate reactions, the sensitivity of skin testing and immunoassay is decreasing and for nonimmediated reactions, skin testing appears to be less sensitive than previous results. Drug provocation test is still the gold standard for identification of an causative drugs. The new diagnostic tools, such as the basophil activation test and the lymphocyte activation test, have been developed and are under validation. Based on the literature, the proposed algorithm may safely and rapidly distinguish between immediate-type and immediate drug reactions. This review provides an update to European Network for Drug Allergy (ENDA) document that gave the guidelines for the evaluation of drug allergy. The diagnosis of drug allergy needs to be standardized. (Korean J Med 76:282-290, 2009)

흰쥐 시각교차위핵에서 빛에 의해 발현되는 유전자에 관한 연구

박환태,김우일,강은경,박중규,배기원 대한해부학회 1999 Anatomy & Cell Biology Vol.32 No.4

치근단 수출 시 형성된 골결손 부위를 가진 치아의 발치 후 즉시 식립 임플란트에서 골 접촉률에 대한 흡수성 차폐막의 효과

양승민,계승범,신승윤,Yang, Seung-Min,Kye, Seung-Beom,Shin, Seung-Yun 대한치주과학회 2008 Journal of Periodontal & Implant Science Vol.38 No.4

Purpose: The guided bone regeneration (GBR) technique is widely used in periradicular surgery. However, there is still some controversy regarding the effectiveness of GBR in promoting bone healing after periradicular surgery. The purpose of this study was to evaluate the resorbable membrane on the osteointegration of immediate implants in sites with periradicular lesion that had been removed by periradicular surgery. Materials and methods: Six roots of lower second premolars and 15 roots of lower third and fourth premolars of dogs were used as control and experimental teeth, respectively. Periradicular lesions were induced only in the experimental teeth. Twelve weeks later, the control and experimental teeth were extracted and implants were placed immediately. Periradicular lesions were removed with osteotomy, curettage and saline irrigation. Resorbable membranes were used in experimental group 1 but not in experimental group 2. After 12 week of healing period, the implants were clinically not mobile and showed no signs of infection. Data obtained by histomorphometric analysis were analyzed by Kruskal-Wallis test. Results: The control group showed a significantly higher bone to implant contact (BIC) ($74.14{\pm}16.18$) than experimental group 1 ($40.28{\pm}15.96$) and 2 ($48.70{\pm}17.75$)(p<0.05). However, there was no significant difference between experimental group 1 and 2. Conclusion: Although BIC in experimental groups were lower than in control group, immediate implant can be successfully placed at extraction socket with periradicular lesion and osseous defect. However, the use of resorbable membrane in bony defect created during periradicular surgery was questioned.

DA-9601 Decreases Immediate-Type Allergic Reaction and Tumor Necrosis Factor-α Production

Park, Hyo-Hyun,Kim, Sug-Hyun,Lee, Soyoung,Moon, Jin-Young,Park, Won-Hwan,Kim, Cheorl-Ho,Chung, Jae Myung,Oh, Tae-Young,Jun, Chang-Duk,Kim, Sang-Hyun The Pharmaceutical Society of Japan 2006 Journal of Health Science Vol.52 No.4

<P>The immediate-type allergic reaction is involved in many allergic diseases such as asthma, allergic rhinitis, and sinusitis. The discovery of drugs for the treatment of immediate-type allergic disease is a very important subject in human health. The formulated ethanol extract of <I>Artemisia asiatica</I> Nakai (DA-9601) has been reported to have anti-oxidative and anti-inflammatory activities. In this report, we investigated the effect of DA-9601 on the immediate-type allergic reaction and studied its possible mechanisms of action, focusing on the mast cell-mediated allergic reaction. DA-9601 inhibited compound 48/80-induced systemic anaphylactic reactions and serum histamine release in mice. DA-9601 decreased the IgE-mediated passive cutaneous anaphylaxis, the model of local allergic reaction <I>in vivo</I>. DA-9601 dose-dependently reduced histamine release from mast cells activated by compound 48/80 or IgE. Furthermore, DA-9601 decreased the gene expression and production of tumor necrosis factor (TNF)-α in phorbol 12-myristate 13-acetate plus A23187-stimulated mast cells. These findings provide evidence that DA-9601 could be a candidate as an anti-allergic agent.</P>

거대세포바이러스 조기항원 단백질에 대한 단세포군 항체 제조에 관한 연구

박지호,손영모,박규현,이원영,Park, Ji Ho,Sohn, Young Mo,Park, Kyu Hyun,Lee, Won Young 대한소아감염학회 1999 Pediatric Infection and Vaccine Vol.6 No.2

목 적 : human CMV가 생성하는 분자량 72,000 dalton의 immediate early protein(p72)과 반응하는 단세포군 항체를 국내에서 분리된 CMV 야생주로 직접 제작하여 진단에 사용해 보기 위한 것이다. 방 법 : 정상 인체 섬유아세포(Foreskin 유래)를 10% 우태아혈청이 함유된 Eagle' s minimal essential medium(MEM)에서 배양하여 사용하였으며 마우스 골수종세포는 P3X63 Ag8.653(ATCC, Mary land USA)을 $5{\times}10^5/ml$ 세포수를 유지하도록 배양하였다. 사용된 항원은 선천성 CMV 감염아의 소변으로부터 검출한 CMV(KJHJ90)를 대량 증식시켜 사용하였다. 생후 6~8주된 Balb/c마우스의 복강내에 CMV 항원을 1주일 간격으로 4회 주사한 후 면역시킨 마우스 비장에서 얻은 임파구와 형질세포종세포로 최적발육기의 P3X63-Ag8.653을 사용하여 융합하였다. 융합세포를 배양한 후 간접면역형광항체법을 이용하여 항체가가 높은 것을 골랐다. 결 과 : 생산된 28종의 단세포군항체 중 그림 1과 같이 LPC12와 LPC23클론이 AD169에 감염된 세포의 핵에 특히 강하게 반응하였다. 정제된 AD169를 SDS-PAGE한 후 Western blotting을 하여 생산된 단세포군항체가 반응하는 항원의 분자량을 확인하였으며 그 중 LPC12와 LPC23클론에서 생성된 단세포군항체는 약 72KDA의 항원과 특이적으로 가장 강하게 반응하였다. 결 론 : 본 연구에서 제작된 LPC12와 LPC23 클론에서 생성된 단세포군 항체를 이용하여 선천성 CMV감염으로 확인된 소아의 소변을 이용하여 CMV AD 169 주 유래 항체(P63-27)과 비교한 DEAFF 검사상 동일한 결과를 확인한 바 LPC12와 LPC 23 클론 항체는 AD 169(P63-27)과 같이 CMV 감염의 조기진단에 사용할 수 있을 것으로 사료된다. Purpose : The purpose of this study is to make and use monoclonal Ab which reacts with CMV major immediate early(${\alpha}$) protein(p72). Methods : Normal human fibroblast(Foreskin derived) was cultured in Eagle's minimal essential medium(MEM) containing 10% cowfetus serum and mouse chondroblast was cultured in P3X63 Ag8.653(ATCC. Maryland USA) to maintain $5{\times}10^5/ml$ cell counts. CMV(KJHJ90) from congenital CMV infected infant's urine was multiplied and used for Ab making. CMV Ag was injected 4 times, 1 week interval into the peritoneal space of 6~8 weeks old mice. And then lymphocyles and fibroblasts taken from spleen were obtained and conjugated. After the conjugated cell cultured, we chose the cell that had high Ab titer using indirect immunofluerescent method. Results : Among the 28 monoclonal antibodies obtained LPC12 and LPC23 reacted highly with nucleus of AD169 infected cell. Purified AD169 after SDS-PAGE, molecular weight of Ag, which reacted with purified monoclonal Ab, was obtained using Western blotting. Monoclonal Ab of LPC12 and LPC23 clone reacted most highly with 72 kd Ag. Conclusion : LPC12 and LPC23 clonal Ab with AD 169(P63-27) is useful on early diagnosis of CMV infection.