지르코니아/알루미나 복합 지대주의 생물학적 안정성에 관한 연구

배규현,한증석,김태일,설양조,이용무,구영,조기영,정종평,한수부,류인철,Bae, Kyu-Hyun,Han, Jung-Suk.,Kim, Tae-Il,Seol, Yang-Jo,Lee, Yong-Moo,Ku, Young,Cho, Ki-Young,Chung, Chong-Pyoung,Han, Soo-Boo,Rhyu, In-Chul 대한치주과학회 2006 Journal of Periodontal & Implant Science Vol.36 No.2

The purpose of the present study is to evaluate the biological stability of the zirconia/alumina composite abutment by histologic and radiographic examination in clinical cases. 17 partially edentulous patients (5 men and 12 women, mean age 47) were treated with 37 implants. The implants were placed following the standard two-stage protocol. After a healing period of 3 to 6 months, zirconia/alumina composite abutments were connected. All radiographs were taken using paralleling technique with individually fabricated impression bite block, following insertion of the prosthesis and at the 3-, 6-, 12 month re-examinations. After processing the obtained images, the osseous level was calculated using the digital image in the mesial and distal aspect in each implant. An ANOVA and t-test were used to test for difference between the baseline and 3-, 6-, 12 months re-examinations, and for difference between maxilla and mandible. Differences at P <0.05 were considered statistically significant. For histologic examination, sample was obtained from the palatal gingiva which implant functioned for 12 months. Sections were examined under a light microscope under various magnifications. Clinically, no abutment fracture or crack as well as periimplantitis was observed during the period of study. The mean bone level reduction(${\pm}standard$ deviation) was 0.34 rom(${\pm}\;0.26$) at 3-months, 0.4 2mm(${\pm}\;0.30$) at 6-months, 0.62 mm(${\pm}\;0.28$) at 12-months respectively. No statistically significant difference was found between baseline and 3-, 6-, 12-months re-examinations (p > 0.05). The mean bone level reduction in maxilla was 0.33(${\pm}0.25$) at 3-months, 0.36(${\pm}0.33$) at 6-months, 0.56(${\pm}0.26$) at 12-months. And the mean bone level reduction in mandible was 0.35(${\pm}0.27$) at 3-months, 0,49(${\pm}0.27$) at 6-months, 0.68(${\pm}0.30$) at 12-months. No statistical difference in bone level reduction between implants placed in the maxilla and mandible. Histologically, the height of the junctional epithelium was about 2.09 mm. And the width was about 0.51 mm. Scattered fibroblasts and inflammatory cells, and dense collagen network with few vascular structures characterized the portion of connective tissue. The inflammatory cell infiltration was observed just beneath the apical end of junctional epithelium and the area of direct in contact with zirconia/alumina abutment. These results suggest the zirconia/alumina composite abutment can be used in variable intraoral condition, in posterior segment as well as anterior segment without adverse effects.

우리나라 보건의료서비스산업의 국민경제 기여도 분석

배규현,이선우 한국문화산업학회 2023 문화산업연구 Vol.23 No.2

본 연구의 목적은 한국 보건의료서비스산업의 국민경제 기여도를 분석하여 향후 정부의 보건의료서비스산업의 정책 및 전략 수립에 일조하는 데 목적이 있다. 이를 위해 본 연구는 한국은행이 발행한 2022년 한국은행 2019년 산업연관표를 활용하였다. 분석결과 우선, 보건의료서비스 산업의 생산유발계수의 열 합계는 2.05023, 행 합계는 1.23378로 32개 산업 중 중간 이하의 순위를 보여 보건의료서비스사업이 국민경제 발전을 뒷받침하는 기초적 전략적 산업에는 아직 부족함을 알 수 있다. 둘째, 보건의료서비스산업의 감응도 계수와 영향력 계수는 각각 0.00186, 0.9196으로 1보다 작은 값을 보여 경제여건에 상대적으로 다소 둔감하며, 타 산업과의 연계 도가 낮은 독립형 산업인 최종 수요적 원시산업형이라 할 수 있다. 셋째, 보건의료서비스산업의 총생산유발액은 10,106,501 십억 원(보건의료서비스산업은 11,168 십억 원, 약 2%), 부가가치유발액은 201,586 십억 원(보건의료서비스산업은 148,037 십억 원, 1.5% ), 소득유발액은 6,020,414 십억(보건의료서비스산업은 73,979 십억 원, 1.2%), 생산세 유발액은 총 321,725 십억 원(보건의료서비스산업은 732 십억 원, 0.2%) 등으로 나타났다. 끝으로, 보건의료서비스산업의 노동 유발효과는 총 33.4명(직접유발 인원 14.9명, 간접유발 인원은 18.5명)으로 전체32가 산업 중 6위이며, 고용 창출 형 산업으로의 역할을 하고 있음을 보여주고 있다.

불화나트륨을 함유한 저작성 정제의 치태제거 및 치은염 완화 효과에 관한 임상시험

배규현,설양조,류인철,한수부,최상묵,정종평,Bae, Kyoo-Hyun,Seol, Yang-Jo,Rhyu, In-Chul,Han, Soo-Boo,Choi, Sang-Mook,Chung, Chong-Pyoung 대한치주과학회 1999 Journal of Periodontal & Implant Science Vol.29 No.2

The objective of this study was to evaluate the effect a chewable tablet containing sodium flouride and lauroyl sodium sulfate on removing plaque and inhibiting gingival inflammation. A randomized parallel study was designed. 100 voluteers participated in the study. There were two test groups each with 30 subject. Test group A was instructed to brush once in the morning, and to use the tablet once in the afternoon and once in the evening. Test group B was instructed to use the tablet three times a day without brushing. There were two control groups each with 20 subjects. Control group A was instructed to brush once in the morning only. Control group B was instructed not to brush all. Two weeks before the test period, the subjects received through tooth cleaning and polishing. At baseline, GI, PI, BOP, and GCF of the Ramfjord teeth were measured in all groups. Bacteria culture was done with the plaque sampled from tooth with the deepest pocket. After 5 days, clinical indices were measured and the bacterial culture was repeated. Control group B was dropped from the study after this period. All the other groups remained and the indices and the culture was repeated after 2 weeks, and 3weeks. Also whether the oral mucosa showed signs of irritation was monitored throughout the test period. Test group A showed less PI, GI, BOP, probing depth, GCF than test group B or control group A. Especially, PI and the BOP was significantly less than that of the group that was instructed to brush once a day. This implies that the added use of this tablet aids in plaque removal in people who brush just once a day. Test group A showed increase of cocci, decrease of motile rods, and decrease of spirochetes after 14-21 days. And this was significantly different from the control group A. At no time of the test period did any of the subjects show signs of irritation of the oral mucosa or adverse reactions. Following conclusions could be obtained from this study. This chewable tablet for enhanced oral hygiene could be used as an adjunct to oral hygiene in people who do not brush adequately. The use of this tablet decreased the number of subgingival bacteria, and this could be effective in plaque removal and for prevention of gingival inflammation.

임상포스터발표 : 지르코니아/알루미나 복합지대주의 생물학적 안정성에 관한 연구

배규현,류인철,한중석,설양조,한수부 대한치주과학회 2004 대한치주과학회 학술대회자료집 Vol.2004 No.2

지난 10년간 응급실로 내원한 자해/자살 시도자의 양상 및 주요 수단으로서의 중독질환 변화 추이 분석(2011–2020)

배규현,이성우,김수진,한갑수,송주현,이시진,박지환,송제준 대한임상독성학회 2023 대한임상독성학회지 Vol.21 No.2

Purpose: Suicide ranks among the top causes of death among youth in South Korea. This study aimed toidentify the characteristics of suicidal individuals treated at emergency departments between 2011 and2020. Methods: A retrospective analysis was conducted using data from January 2011 to December 2020 inthe Injury Surveillance Cohort, a prospective registry. Patients’ sex, age, mortality, methods of self-harm,and previous suicide attempts were analyzed. The methods of self-harm were categorized into falls, as phyxiation, blunt injuries, penetrating injuries, poisoning, and others. Sub-groups with and without poi soning were compared. Results: The proportion of self-harm/suicide attempts increased from 2.3% (2011) to 5.0% (2020). Themortality rate decreased from 10.8% (2011) to 6.3% (2020). Poisoning was the most common method(61.7%). Mortality rates ranged from 42.0% for asphyxiation to 0.2% for blunt injuries. Individuals intheir 20s showed a marked increase in suicide/self-harm attempts, especially in the last three years. Alarge proportion of decedents in their 70s or older (52.6%) used poisoning as a method of suicide. Thepercentage of individuals with two or more previous attempts rose from 7.1% (2011) to 19.7% (2020). Thedeath rates by poisoning decreased from 7.7% (2011) to 2.5% (2020). Conclusion: Our findings underscore the urgent need for targeted interventions and suicide preventionpolicies. Managing and reducing suicide and self-harm in emergency settings will require a focus on poi soning, the 10–29 age group, and the elderly. This paper will be valuable for future policies aiming to re duce the societal burden of suicide and self-harm.

크레인 정밀 정지위치결정을 위한 입력성형기법 개선

배규현,홍성욱,박상원 한국공작기계학회 2008 한국공작기계학회 추계학술대회논문집 Vol.2008 No.-

Input shaping is widely accepted to be a useful tool for removing residual vibration in cranes. The UMZV(unity magnitude zero vibration) input shaper is often employed for cranes driven by on-off type motors. However, the UMZV input shaper makes the cranes move slightly further than expected from the original command while it can remove the residual vibration out of the cranes. This paper deals with a method of input shaping scheme which can compensate the position inaccuracy as well as remove the residual vibration of cranes. The proposed method is illustrated through a numerical simulation.

통신서비스산업의 경제적 파급효과 분석

배규현,이선우 한국상품학회 2022 商品學硏究 Vol.40 No.6

본 연구는 통신서비스산업의 경제적 파급효과를 분석하여 향후 국민들의 통신서비스산업에 대한 인식 제고는 물론 정부와 기업의 통신서비스산업 정책 추진과 발전에 도움을 주는데 목적이 있다. 이를 위해 본 연구는 한국은행 2019년 산업연관표 기본부문 278개 산업분류 중 유선, 위성 및 기타 방송업,유선통신업, 무선 및 위성 통신업 등 3개 산업을 통신서비스산업으로 분류하여 경제적 효과를 분석하였다. 분석 결과는 다음과 같다. 우선, 통신서비스산업의 생산유발계수는 열 합계는 1.82849, 행합계는 1.42254로 32개 산업 중 중간 이하의 순위를 보이고 있다. 둘째, 통신서비스산업의 영향력계수(후방연쇄효과)는 1.00374,감응도계수(전방연쇄효과)는 .78090으로 통신서비스산업의 다른 산업의 중간재 역할이 미흠함을 알 수 있다.셋째, 통신서비스산업의 소득유발계수는 .23153로, 생산세유발계수는 .08275, 부가가치유발계수는 .82533로 나타났다. 넷째, 통신서비스산업에서 유발하는 생산유발액은 21,334,0십억원, 부가가치유발액은 9,763.9십억원, 소득유발액은 3,426.9십억 원 그리고 생산세유발액은 899.2십억원으로 타산업에 낮은 경제적 효과를 보였다. 끝으로, 통신서비스산업의 노동유발효과는 834.5명이 유발되며, 그 중에서 직접유발인원은 57.9명, 간접유발인원은 776.6명으로 나타나 다른 서비스산업 특히 정보산업보다 높은 고용창출형 산업으로의 역할을 하고 있음을 보여주고 있다.

재생 불량성 빈혈(Aplastic anemias) 환자의 치주 치료 증례

배규현,한수부,김우성,이혜아,김동균,Bae, Kyoo-Hyun,Han, Soo-Boo,Kim, Woo-Sung,Lee, Hye-Ja,Kim, Dong-Kyoon 대한치주과학회 1998 Journal of Periodontal & Implant Science Vol.28 No.1

Aplastic anemia is a disease characterized by general lack of bone marrow activity; It may affect not only the red blood cells but also the white blood cells and platelets, resulting in pancytopenia. Spontaneous gingival hemorrhage is present in some cases and it is related to the blood platelet deficiency. This case report presents the periodontal treatment of a patient with aplastic anemia. A 43-year-old female was referred for continuous gingival bleeding after periodontal treatment. Periodontal findings revealed generalized gingival imflammation, oozing of blood from gingival crevice, and it was diagnosed as adult periodontitis. Root planing and extraction of the upper left third molar with poor prognosis were put into operation after elevation of the platelet count with platelet transfusion. The extraction socket was sutured with 3-0 silk. Bleeding continued even after digital compression at the upper right second premolar, second molar, and left canine areas, which presented severe inflammation. Although platelets were transfused repeatedly, platelet count did not stay elevated since survival rate of the transfused platelets were low due to alloimmunization. Thrombin gauze packing was not effective. Bleeding ceased 3 days after treatment with transfusion of donor platelets. 20 days after the treatment, the gingiva was generally healthy except upper right second premolar and lateral incisor areas. The result of periodontal treatment was good, but bleeding control after treatment was troublesome. In the periodontal treatment of patient with aplastic anemia, elevation of the platelet count with platelet transfusion seems to be the best method for hemorrhage control.

입력성형기법을 이용한 변위증폭형 마이크로스테이지 잔류진동제어

배규현,송은혜,강중옥,홍성욱 한국공작기계학회 2009 한국공작기계학회 춘계학술대회논문집 Vol.2009 No.-

This paper presents a result of application of input shaping to a micro-stage with a displacement amplification mechanism. The stage considered in this study is subjected to severe residual vibration in its lever mechanism to amplify displacement. The system dynamics exhibit some nonlinear nature due to the hysteresis of the PZT actuator. Input shaping method is successfully applied to the system so as to eliminate residual vibration from the system. The experimental study also shows that staircase input is useful to avoid the performance degrade by the nonlinear characteristics.

각 어긋남이 각접촉 볼베어링의 수명에 미치는 영향

배규현(G.H. Bae),통반칸(V.C. Tong),홍성욱(S.W. Hong) 한국생산제조학회 2015 한국생산제조시스템학회 학술발표대회 논문집 Vol.2015 No.10