Assessing changes of peri-implant bone using digital subtraction radiography

Kwon Ji-Yung,Kim Yung-Soo,Kim Chang-Whe The Korean Academy of Prosthodonitics 2001 대한치과보철학회지 Vol.39 No.3

Digital subtraction radiography may be one of the most precise and noninvasive methods for assessing subtle density changes in peri-implant bone, providing additional diagnostic information on implant tissue integration in overall maintenance. The aims of this study were to evaluate density changes after first, second surgery of dental implant and to measure the amount of marginal bone loss 9 months after second surgery using digital subtraction radiography. Bone change around 30 screw-shaped implants in 16 patients were assessed on radiographs. 17 Branemark implants of 3.75mm in diameter(Nobel Biocare, Goteborg, Sweden), 2 Branemark implants of 5.0mm in diameter, 11 $Replace^{TM}$ implants of 4.3mm in diameter(Nobel Biocare, Goteborg, Sweden) were used. To standardize the projection geometry of serial radiographs of implants, customized bite block was fabricated using XCP film holder(Rinn Corporation, Elgin, IL.) with polyether impression material of Impregum(ESPE, Germany) and direct digital image was obtained. Qualitative and quantitative changes on radiographs were measured with Emago software(The Oral Diagnostic System, Amsterdam, Netherlands). The results were as follows: 1. The peri-implant bone density of 69.2% implants did not change and the peri-implant bone density of 30.8% implants decreased after 3 months following first surgery. 2. The crestal bone density of 53.9% implants decreased first 3 months after second surgery. The crestal bone density of 58.8% implants increased 9 months after second surgery. No density change was observed around the midportion of the implants after second surgery, 3. The amount of marginal bone loss between different kinds of implants showed no statistically significant differences (p>0.05). 4. More than 90% of total marginal bone loss recorded in a 9-month period occurred during the first 3 months.

Restoration of Mandibular Edentulous Patient By Dental Implant: Case Report

Kwon, Ji-Yung,Kim, Yung-Soo The Korean Academy of Prosthodonitics 2000 대한치과보철학회지 Vol.38 No.3

The completely edentulous patient has few treatment options in conventional dentistry. When implants are considered, treatment plans range from a 2-implant overdenture to a completely implant-supported prosthesis. Fixed prosthesis is often the preferred selection of the edentulous patient. fixed full-arch cert amo-metal restorations can be a predictable implant treatment modality for the edentulous patient. Implant-supported fixed prosthesis has several advantages: predictability, fixedness, retrievability, improved function, lower maintenance of prosthesis, long-term published success. Edentulous patients with a severely resorbed mandible often experience problems with their dentures. Treatment concepts involving two to four implants for the support of an overdenture have been proposed. There seems to be no need to insert more than two endosteal implants to support an overdenture, however, long-term prospective studies are needed to support this notion. Using short endosseous implants and an overdenture in the extremely resorbed mandible is a justified treatment option because of the relative simplicity and low morbidity of this treatment strategy. Implant-supported overdenture has several advantages: Cost, retrievability, hygiene access, profile and contour control, increased retention and stability, implant installed in a predicted region(ant. mandible).

공사중단 방치건축물의 실태분석 및 제도 개선방안

권영수 ( Yung Soo Kwon ),최완호 ( Wan Ho Choi ) 한국감정평가학회 2014 감정평가학논집 Vol.13 No.1

우리나라 건축물의 공사가 중단된 채로 오랜 기간 방치되는 경우가 늘어나고 있다. 공사가 중단된 건축물이 장기간 방치될 경우, 우리나라와 같이 토지 자원이 한정된 국가에서는 그 토지를 활용하지 못하여사회적 차원의 낭비가 발생하게 된다. 도시 내 방치건축물은 범죄ㆍ탈선 장소로 활용되거나 화재 발생이 우려되는 등 각종 사회적 부작용과 비용을 수반하고 있는 실정이다. 본 연구는 ‘방치건축물’의 전반적인 발생현황과 실태를 파악하고, 사례분석을 통하여 방치건축물의 체계적인 정비를 위한 법제개선 방안을 모색하는 것이 목적이다. 실태분석결과 전국적으로 795곳의 공사중단 현장이 발생하였으며, 이중 384개 현장이 공사재개, 철거등의 조치가 취해졌고, 442개 현장이 공사가 중단된 체 방치되고 있는 것으로 나타났다. 현행 방치건축물의 정비와 관련된 문제는 ‘특별조치법’상의 문제점과 ‘기존 법제상의 문제점’으로 구별하여 파악하였다. 이에 대한 해결방안으로는 우선, 철거명령, 공사비용의 보조, 공사중단 건축물의 취득과 관련된 조항을 개정하며, 제3자 인수를 위한 진정유치권자 확인간이소송제도의 마련한다. 다음으로 「건축법」 개정을 통한 안전관리예치금제도 개선, 행정대집행의 강화이다. The number of incomplete and neglected construction of a building for lengthy period of time has been increased. If the incomplete building is neglected for long period of time, the land resources can’t be utilized appropriately and causes social waste because Korea has limited land resources. Abandoned building in the city mostly involves social side-effect and cost, such as place for crime and deviation or outbreaking of fire. This research’s purpose is to realize overall current situation and facts of the abandoned buildings and finding regulation improvement plan for systematic maintenance of abandoned buildings throughout case analysis. As a result of status analysis, there are 795 incomplete construction, nationally. Out of these, 384 constructions took actions, such as resuming or demolishing, and 442 constructions are abandoned as incomplete building. As a fundamental direction of improvement plan, necessity and propriety of abandoned building with public involvement has been reviewed. Moreover, solutions by modifying the Building Act and direct purchasing are suggested for the abandoned and incomplete buildings. Improving maintenance management deposit system, reinforcing vicarious administrative execution, and adopting subsidies system are suggested for Building Act modification. For the solution of direct purchasing by local government, adopting “Act on Incomplete and Neglected Construction for Long-term,” inserting purchasing basis regulation on the building act, and utilizing government fund from “Built Environment Renewal Development Act” are suggested.

『협길통의(協吉通義)』 본원일(本原一)의 5행(行)에 관한 연구

권영수 ( Yung-soo Kwon ),김기승 ( Ki-seung Kim ) 산업진흥원 2020 산업진흥연구 Vol.5 No.3

오행(五行)이란 만물을 형성하는 다섯 원소(元素)로 인간 삶의 불가결한 요소라는 점에서 상징화(象徵化)되었다. 또 각각의 특유한 기(氣)는 만물의 존재(存在)와 작용(作用)의 유래(由來)를 설명하는 데 활용되었다. 오행이론(五行理論)은 오행의 상생·상극(上生·相剋), 오행 자체, 간지오행(干支五行)의 결합, 오행의 왕상휴수사(旺相休囚死), 오행과 음양(陰陽) 등 여러 가지 형태로 변화·활용될 수 있다. 특히 『협길통의(協吉通義)』 본원일(本原一)에서는 5행(五行), 간지5행(干支五行), 5행용사(五行用事), 5행생왕(五行生旺), 3합(三合), 6합(六合), 5합화기(五合化氣)등으로 세분하여 다루고 있으므로 이를 분석·활용하면 오행이론(五行理論)만으로 명(命)을 볼 수도 있고 다른 이론(理論)과 결합하여 보다 세밀한 간명(看命)을 할 수 있게 된다. Five elements that form all things have been symbolized in that they are indispensable elements in human life. Moreover, each unique energy has been used to explain the existence of all creation and the origin of action. The theory of five elements can be changed and utilized into various forms, including co-existence and conflict of five elements, five elements itself, the combination of Ganji five elements, Wangsanhyususa(旺相休囚死), five elements and Yin-yang. Especially, 『Hyupgiltongui Bonwon chapter one covers five elements, five elements of Ganji, seasonal use of five elements, prosperity and decline of five elements depending on seasons, Union of 3 elements among Twelve Zodiac Signs(三合), Union of two elements among Twelve Zodiac Signs(六合), changes of Cheongan 5hab. Therefore, if you analyze and utilize them, you can tell someone’s fortune by theory of five elements only and read fortune in detail by combining it with other theories.

『협길통의(協吉通義)』 本原一의 역률(曆律)에 대한 분석

권영수 ( Yung-soo Kwon ),김기승 ( Ki-seung Kim ) 산업진흥원 2021 산업진흥연구 Vol.6 No.1

역법(曆法)은 역대 왕조마다 매우 중대한 관심사였다. 조선시대 『협길통의』에는 역법과 관련된 많은 내용들이 수록되어 있다. 특히 『협길통의』 본원1에서 보여주는 고대 역률은 선택(選擇)과 간명(看命)에 필요한 역법을 만들어가는 과정의 의미가 있다. 따라서 『협길통의』의 바탕이 되는 『협기변방서』, 『상길통서』, 『천기대요』 등을 비교분석하여 사주간명과 실생활에 활용될 수 있는 역법과 역서의 근본원리가 되는 역률을 분석하고자 한다. 사주명리학이란 간지(干支)의 결합에 의한 시간변화의 이치를 깊이 연구하는 것이다. 따라서 역법은 연월일시를 세우는 것이 그 핵심이다. 이를 위해 『협길통의』에서는 십간·십이지, 사서(四序), 육진(六辰), 갑력(甲曆) 등과 같은 간단한 간명구성원리(看命構成原理) 뿐만 아니라 28수(宿)와 같은 별자리를 활용하는 등의 사주명식(四柱命式)을 세우기 위한 기본원리나 자료를 제공하고 있다. 그러나 역률이 빚어내는 결과의 한계가 있음에도 사주간명이 과학이 아닌 술법으로 보아 길(吉)한 것을 찾아가는 것이라면 그 유용성을 무시할 수만은 없다는 결론에 이르렀다. The Calendar(曆法) has been a very important concern in every dynasty of history. 『Hyupgiltongui』 written in the Joseon Dynasty included many contents related to the Calendar. In particular, the ancient rule of the Calendar(曆律) shown in the text of 『Hyupgiltongui』 Bonwon chapter one is meaningful in the process of creating the necessary Calendar for selection and reading fortune. Accordingly, we tried to analyze the rule of the Calendar(曆律) that is the fundamental principle of the Calandar(曆法) and the almanac which can be used in real life, based on comparative analysis of 『Hyupgibyeonbangseo』, 『Sanggiltongseo』 and 『Cheongidaeyo』, which are the basis of 『Hyupgiltongui』. Saju Myung-ri is the scheme of time change by the combination of Ganji (Celestial Stems). Therefore, the core of the calendar system is to make four pillars by the year, month, day, and time. For doing this, 『Hyupgiltongui』 provides basic principles and materials for making four pillars using constellations like 28 Fixed Stars, as well as does simple composition principle for telling fortune such as Ten Celestial Stems, Twelve Zodiac Signs, the order of four seasons(四序), Yukjin(六辰) and Sexagenary Cycle (甲曆). However, despite the limitations of the results produced by the rule of the Calendar(曆律), we came to the conclusion that if reading fortune in Saju(四柱簡明) is to find good one(吉) in terms of understanding it as the rule of predicting future(術法) not science, its usefulness cannot be ignored.

연구원 활동 : 발표논문요약 < 전기공학분야 >

(Kwang Ho Kwon),(Hyung Ho Park),(Soo Min Lee),(Byong Hwa Koak),(Bo Woo Kim),(Oh Joon Kwon),(Yung Kwon Sung) 고려대학교 공학기술연구소 1994 공학기술연구소보 Vol.1 No.-

CHF₃/ C₂F<SUB>6</SUB> 반응성 이온 건식 식각시 실리콘 표면 잔류막 특성 변화에 미치는 감광막 마스크의 영향

권광호(Kwang-Ho Kwon),이수민(Soo Min Lee),이종석(Jong Suck Lee),강성준(Sepmg Jun KANG),김보우(Bo Woo Kim),박형호(Hyung-Ho Park),이중환(Joong-Wan Lee),정성화(Sung Hwa Jhung),권오준(Oh-Joon Kwon),성영권(Yung-Kwon Sung) 대한전자공학회 1991 대한전자공학회 학술대회 Vol.1991 No.6

ANALYSIS OF THE FIT IN THE IMPLANT PROSTHESIS USING A LASER DISPLACEMENT METER AND THREE-DIMENSIONAL FINITE ELEMENT METHOD

Kwon Ho-Beom,Kim Yung-Soo,Kim Chang-Whe The Korean Academy of Prosthodonitics 2001 대한치과보철학회지 Vol.39 No.6

A precise fit of the implant prosthesis is one of the most important factors in preventing mechanical complications. To analyze the degree of the misfit of implant prosthesis, a modal testing experiment was accomplished. And. to interpret the modal testing analysis mathematically, three-dimensional finite element models were established. In the experimental modal testing analysis, with a laser displacement meter, FFT analyzer, impact hammer, etc., natural frequencies of the models with various degree of prosthesis fit were determined after the frequency response function were calculated. In the finite element analysis, the natural frequencies and mode shapes of the models which simulated those of experimental modal testing were computed. The results were as follows: 1. Natural frequencies of the prosthesis-abutment were related to the contact state between components. 2. In the modal testing experiment, the natural frequencies increased from $50{\mu}m$ to $200{\mu}m$ gap and reached a plateau. 3. In the finite element analysis, the natural frequencies decreased gradually according to the in crease of the gap size. 4. In the finite element analysis, the mode shapes of model 1 with misfitting prosthesis showed different patterns from those without misfitting prosthesis. 5. The devices including a laser displacement meter used in this study were useful for measuring the natural frequencies of an implant prosthesis which had various degrees of fit.

還元型 Glutathione 이 急性 에타놀 中毒 흰쥐의 腎蛋白量 및 Glutathione 量에 미친는 效果

權奇榮,朴載植,黃樹寬,朱永恩 慶北大學校 醫科大學 1975 慶北醫大誌 Vol.22 No.2

還元型 glutathione(GSH)의 投與가 에타놀 急性中毒 흰쥐의 賢代謝에 效果的인 影響을 미칠 수 있느냐를 알기 爲하여, 흰쥐를 材料로 하고, 50% 에타놀을 體重 100gm 當 1.5㎖ 씩 經口的으로 投與한 群(EOH群)과 그 前 3日間 每一體重 100gm 當 5㎎의 GSH 溶液을 腹腔內 注射한 後 에타놀 中毒을 일으킨 群(GSH+EOH 群) 및 GSH 만을 投與한 對照群(GSH 群)에서 各各 24時間까지 輕視的으로 賢蛋白量, 賢組織의 GSH 및 GSSG 量, 에타놀 血中 濃度와 Hct 値를 測定하여, 正常群과 서로 比較하여 다음의 結果를 얻었다. 賢蛋白量은 正常値인 167.4±4.72㎎/gm 에 比하여 EOH 群에서는 1時間부터 有意하게 낮은 값을 나타내어 3時間에서 最低値를 보인 後, 24時間에는 正常値로 돌아왔고, GSH+EOH 群에서도 1 및 3時間에서는 正常보다 낮은 값을 나타내었으나 EOH群보다는 높은 값을 나타내었을 뿐 아니라, 6時間에서 正常値에 가까워지는 傾向을 나타내었다. 賢組織 GSH 는 EOH 群에서는 1時間에서 이미 有意하게 높은 값을 나타내었고, 3時間에서 最高値를 나타낸 後, 24時間까지 漸次 正常範圍로 돌아왔고, GSH+EOH 群에서도 EOH 群과 비슷한 傾向을 나타내었으나, 그 程度가 緩慢하여 EOH 群의 그것보다는 낮은 값을 나타내었다. 賢組織의 GSSG 는 EOH 群에서는 6時間까지 正常보다 낮은 傾向을 나타낸 後, 24時間에서 正常値로 回復되었고, GSH+EOH 群에서는 EOH 群보다 全體的으로 높은 값을 나타내어 거의 正常値와 비슷한 傾向을 나타내었다. 血中 에타놀 濃度는 EOH 群에서는 1時間에 567.0±19.0㎎%로서 急激히 높아져서 그 後 2時間까지 徐徐히 낮아졌으나 正常보다는 모두 有意하게 높은 값이었다. GSH+EOH 群에서도 이와 비슷한 傾向을 나타내었으나 EOH 群보다는 若干 낮은 듯하였다. Hct 値는 正常의 44.8±1.82%에 比하여 EOH 群에서나 GSH+EOH 群에서 모두 3時間에서 最高値를 나타낸 後, 24時間에서는 正常値로 回復되었고, GSH+EOH 群이 EOH 群보다는 若干 낮은 傾向을 나타내었다. 以上의 結果로서 GSH 投與가 急性 에타놀 中毒에서 그 中毒狀態를 相當히 有效하게 回復시킬 수 있다고 思料된다. The radioprotective and detoxification effect of reduced glutathione(GSH) is well known. However, the effectiveness of GSH in acute ethanol intoxication has not been fully described. In the present study, an effort was directed to elucidate the possible effectiveness of GSH in acute ethanol intoxication, taking kidney protein and glutathione levels as the parameters. One hundred and thirty-seven fully matured albino rats of either sex were used, and 1.5ml of 50% ethanol per 100gm BW was orally intubated to produce the acute ethanol intoxication(EOH group). GSH in the dose of 5 mg per 100 gm BW for three days was intraperitoneally injected either alone(GSH group) or prior to ethanol intoxication(GSH+EOH group) which was initiated immediately after the last injection of GSH. The rat was sacrificed by cutting the carotid arteries and the blood sample was obtained. The both kidneys were immediately excised and placed into an ice-cold saline until ready for use. The experiment was performed at 1, 3, 6, 12 and 24 hrs in all groups. The protein of the kidney was measured by the method of Lowry, et al, GSH level by the Ellman's method and GSSG level by the electrolytic reduction method of Dohan and Woodward. Hct was determined by the conventional microhematocrit method using Adams microhematocrit centrifuge and reader, and the blood ethanol concentration was measured by the method of William, et al. The results are summarized as follows. The kidney protein level in EOH group was decreased with the lowest value at 3hr after EOH administration comparing with the normal value of 167.4±4.72mg/gm. Recovery to the normal value was obserued at 24hr. In GSH+EOH group, the tendency of lowered kidney protein level was similar to EOH group. However, GSH+EOH group showed higher protein lecel than EOH group in general and recovery to the normal level was at 6hr after the administration. The GSH content of the kidney in EOH group was significantly higher at 1hr with the highest value at 24hr after the administration. GSH+EOH group exhibited the similar tendency to EOH group but the tendency was much lower than EOH group. THe GSH content of the kidney in EOH group was significantly higher at 1hr with the highest value at 3hr comparing with the normal. Recovery to the normal value was observed at 24hr after the administration. GSH+EOH group exhibited the similar tendency to EOH group but the tendency was much lower than EOH group. The GSSG content of the kidney in EOH group was generally decreased upto 6hr with the recovery to the normal value at 24hr after the administration. In GSH+EOH group, the kidney GSSG content in general was higher than or similar to normal value. The blood ethanol concentration in both EOH group and GSH+EOH group showed significantly higher values at 1hr with the slowly decreasing tendency upto 24hr after the administration, but the tendency was more prominent in EOH group. Hct value in both EOH group and GSH+EOH group showed the highest value at 3hr with the tendency of recovery at 24hr, but EOH group showed higher value than GSH+EOH group. From the above, it may be concluded that the administration of GSH is effective to a certain degree in acute ethanol intoxication.

Spontaneously Reported Hepatic Adverse Drug Events in Korea: Multicenter Study

Kwon, Hee,Lee, Suk-Hyang,Kim, Seong-Eun,Lee, Jae-Hyun,Jee, Yung-Koo,Kang, Hye-Ryun,Park, Byung-Joo,Park, Jung-Won,Hong, Chein-Soo The Korean Academy of Medical Sciences 2012 JOURNAL OF KOREAN MEDICAL SCIENCE Vol.27 No.3

<P>Hepatic adverse drug reactions (ADRs) to certain drugs may differ within each country, reflecting different patterns of prescription, socioeconomic status, and culture. The purpose of this study was to assess the suspected cause of hepatic ADRs using the spontaneously reported pharmacovigilance data from Korea. A total of 9,360 spontaneously reported adverse drug events (ADEs) from nine Pharmacovigilance Centers were analyzed. Risk of hepatic ADEs was assessed by calculating the reporting odds ratio (ROR). Of the 9,360 cases, 567 hepatic ADEs were reported. The most frequently prescribed drug classes inducing hepatic ADEs were anti-tuberculotics, cephalosporins, valproic acids, penicillins, quinolones, non-steroidal anti-inflammatory drugs (NSAIDs), anti-viral agents, and statins. ROR values were especially high in anti-tuberculosis drugs, systemic antifungal drugs for systemic use, anti-epileptics, propylthiouracil, and herbal medicines. Underlying diseases such as tuberculosis (6.9% vs 0.9%), pneumonia (4.9% vs 1.7%), intracranial injury including skull fracture (4.5% vs 0.9%), HIV (3.4% vs 0.4%), subarachnoid hemorrhage (2.8% vs 0.5%), and osteoporosis (2.4% vs 1.4%) were significantly more common in hepatic ADE group. In conclusion, anti-infective drugs, anti-epileptics, NSAIDs and statins are the most common suspects of the spontaneously reported hepatic ADEs, in Korea. Careful monitoring for such reactions is needed for the prescription of these drugs.</P>