골절단을 이용한 급속 치아이동 후 치수 및 치주조직 변화

강경화,김은철,이선경,임채웅,마쓰다 기꾸,태기출,김상철 대한치과교정학회 2004 대한치과교정학회지 Vol.34 No.2

본 연구는 골절단을 이용한 치아-치조골 분절의 급속 치아이동 후 치수, 치주인대 및 치조골의 변화를 유성견에서 평가하고자 하였다. 하악 제4소구치의 근심, 원심, 치근단 부위에서 피질골을 절단하여 치아-골 분절을 형성하고 하악 제3소구치를 발거하면서 협측, 설측 부위의 피질골을 삭제하였다. 1주 휴지기 부여에 따라 휴지기군과 비휴지기군으로 나누어 치아의존형 견인장치로 6일 동안 견인하고 강화기를 거친 후 0주, 1주, 2주, 4주, 6주, 8주에 희생시켜 치수, 치주인대 및 치조골의 조직 변화를 임상적, 방사선적, 조직학적 및 면역화학적으로 평가하여 다음과 같은 결과를 얻었다. 1. 치아이동 양과 강화기 동안의 조직 치유 양상에서 휴지기 유무에 따른 차이는 없었다. 2. 견인측에서 골형성은 강화기 8주까지 계속되었는데 강화기 1-2주에 가장 활발하였으며 6-8주간의 변화는 적었다. 3. 비휴지기군의 강화기 1주에서 치조골 흡수 및 파골세포 출현, 염증세포 침윤이 가장 많았으며, 특징적으로 파상아세포가 압박측의 치주인대와 치수 내에 나타났다. 4. TGF-β는 치조골의 골기질 및 골모세포, 파골세포, 치수 내 파상아세포에서 강양성 발현을 보인 반면 치수, 백악모세포, 무세포성 백악질에서 경미한 양성 발현을 나타내는 부위 특이성이 있었다. 5. TGF-β는 견인측 치주인대의 치조골에 인접한 혈관 및 치주인대세포, 골모세포에서 강화기 초기 1-2주에 주로 발현되었으며 6주 이후에는 발현이 크게 감소하였다. The movement of tooth-bone segments by osteotomy can simultaneously shift tooth and surrounding alveolar bone in a relatively short period. The purpose of this study was to evaluate the tissue changes in pulp, periodontal ligament, and alveolar bone in rapid tooth bone movement with osteotomy. The mandibular 3rd premolar of a dog was extracted and cortical bones of the buccal and lingual area were eliminated, and then cortical bones around the mesial and distal area of root, and below the root apex of the mandibular 4th premolar were osteotomized. After a one week latency period, a tooth-borne distraction device was activated for 6 days. And pulp, periodontal ligament and alveolar bone were evaluated clinically, radiologically, histologically and immunohistochemically at 0, 1, 2, 4, 6, 8 weeks of the consolidation period and conclusions were reached as follows. 1. Latency period didn't affect total amount of tooth movement and healing process of tissue during consolidation period. 2. Bone formation continued through 8 weeks of consolidation in distracted side, with a high peak at 1-2 weeks, and the lowest at 6-8 weeks of consolidation. 3. At 1 week of consolidation, alveolar bone resorption, osteoclast appearance and inflammatory cell infiltration were the most active, and dentinoclasts characteristically appeared on the pulp and pressure side of the periodontal ligament. 4. The expression of TGF-β was area-specific, as it was strong-positive at bone matrix, osteoblast, osteoclast of alveolar bone, and dentinoclast inside pulp, but weak in pulp, cementoblast and acellular cementum. 5. The expression of TGF-β was generally observed at the initial 1-2 weeks of consolidation at vessels, periodontal ligament cells, and osteoblast near alveolar bone on the distraction side of the periodontal ligament, and was significantly decreased after 6 weeks of consolidation.

일부 소방공무원의 음주와 직무스트레스와의 관련성

강경화,이강숙,김석일,맹광호,홍현숙,정춘화 大韓産業醫學會 2001 대한직업환경의학회지 Vol.13 No.4

목적 : 소방공무원의 음주량과 직종별 직무 스트레스에 대해 알아보고 보다 나은 스트레스 관리방안과 문제성 음주예방을 위한 프로그램을 모색하기 위해 시도되었다. 대상 : 2000년 7월부터 8월까지 소방공무원 중 구조대원 97명, 구급대원 97명, 화재진압대원 179명,행정대원 116명, 기타대원 49명을 대상으로 설문지를 이용하여 수집된 자료를 분석하였다. 결과 : 소방공무원은 모든 직종에서 승진 및 임금제도의 스트레스 요인 점수가 가장 높았다. 직종별로 직무 내적 요인, 조직에서의 역할, 대인관계, 조직과 풍토, 직장환경과 스트레스 결과 점수에 있어 유의한 차이를 보였다 과음 주자인 경우 직무 내적요인, 직무 스트레스 수준, 개인적 특성, 대처방식의 점수가 높았으나 유의하지 알았다. 음주량은 직무내적 요인 중 업무 피드백과 음의 관련성을, 직무 스트레스 요인 중 역할 갈등은 음주량을 증가시키는 것으로 나타났다. 결론 소방공무원의 가장 높은 직무 스트레스 요인으로는 승진 및 임금제도인 것으로 나타났다. 음주량은 역할 갈등과 같은 직무 스트레스 요인과 관련이 있었으며, 향후 전향적인 음주행태조사를 통해 직무 스트레스 요인이 음주에 미치는 영향을 파악하기 위한 연구가 필요하다고 생각된다. 따라서 본 연구결과를 기초로 소방공무원의 직무 스트레스 요인에 대한 적절한 관리와 정책이 필요한 것으로 사료된다. Objectives : To establish the relationship between alcohol use and job stress among firemen, and to develop a comprehensive health promotion program including stress management and the prevention of problem drinking. Methods : Data was collected from July to August, 2000. Study subjects included 97 rescue workers, 97 emergency medical personnel, 179 fire extinguishers, 116 administrators and 49 others. Results : The firemen displayed higher scores of stress due to promotion-related pres-sures and salary. We found significant differences in job internal factors, job role, inter-personal relationship, organizational norm, work environment and stress outcome among the various jobs. Job internal factors, job stress factors, personal characteristics, coping skills, and stress outcome were higher in heavy drinkers compared with the light and moderate drinkers. Job internal factors and smoking habit showed a positive correlation with the amount of drinking, although coping skill, exercise frequency and monthly income showed a negative relation with the amount consumed. Conclusion : This study suggested that alcohol drinking is associated with job stress. This suggests that a comprehensive health promotion program including stress management and problem drinking prevention and control should be developed.

생물막여과공정에 의한 고도정수처리시스템 구성에 관한 연구

강용태,양희천,김화석,김경동 동아대학교 환경문제연구소 1999 硏究報告 Vol.22 No.2

This study is to evaluate the characteristics of submerged biofilter process as pretreatment of raw water and alternative advanced water treatment system(AAWTS) composed with bioflitration, post-ozonation and GAC for Nakdong River by comparison of existing advanced water treatment system(EAWS), composed with pre-ozonation, flocculation, sedimentation, sand filtration, post-ozonation and GAC. In the biofiltration process, the removal of turbidity, color, KMnO₄consumption, NH₃-N and UV254 reached 98%, 95%, 70%, 72%, 79% respectively. The stable removal efficiency was obtained by the direct biofiltration after coagulant injection thought the influent was a muddy and highly polluted. The removal efficiency of the alternative advanced water treatment(AAWTS) using biofiltration process for turbidity, color, KMnO₄consumption, NH₃-N and UV254 was reached 98.5%, 98%, 82%, 90%, 92% respectively. It is equivalent to the removal efficiency of existing advanced water treatment system(EAWTS) though the demanded area and coagulant of the alternative advanced water treatment system using biofiltration process was decreased about 60% and 70% respectively.

일 도시 고등학생의 음주동기와 음주문제

강혜영,신경은,장현지,나영화,조은희 韓國學校保健學會 2004 韓國學校保健學會誌 Vol.17 No.2

Purpose : The purpose of this study was to investigate drinking motives and the drinking-related problems of Korean high school students at a city in Jeonbuk province. Methods : There were 657 students from two academic and two vocational high schools at J city in Jeonbuk province. The sample was collected using a stratified sampling method and the data was collected from June 30th to July 16th 2003. The study instrument used to examine drinking motive was a 20.item summated scale (Cronbach's α = .95) and for drinking-related problems was an 18 item summated scale (Cronbach's α = .91). The data was analyzed using SPSS/PC+ by percentage, χ2.test, t-test and correlations. Results : 1. Drinking experience: Among the high school students, 74.3% of them had drinking episodes. Female students started drinking later (χ2 = 12.857, p = .002) and had more drinking friends (χ2 = 7.785, p = .020) than males. Vocational school students drank more frequently (χ2 = 32.138, p = .001), had more heavy drinking episodes (χ2 = 40.370, p = .001). 2. Drinking motives & Drinking-related problems: The mean score of drinking motives was 31.2 ± 11.12 out of 80 and that of drinking-related problems was 21.8 ± 5.85 out of 72 points. Neither score were stronger was significantly different according to gender and grade. On the other hand, both drinking motives (t = .4.077, p = .001) and drinking-related problems (t = .3.423, p = .001) were stronger in vocational school students than in academic school students. The correlation between drinking-related characteristics and problems were weak (from r = .286 to r = .520) but the correlation within the subcategories of drinking motives was high such as between enhancement and coping (r = .822) and enhancement and social motives (r = .822). Conclusion : The majority of Korean high school students start to drink during their junior high school days. Drinking motives and drinking-related problems were not serious but the drinking motives and the drinking-related problems are stronger among vocational school students. As a result, school-based health education and counseling programs should focus on solving drinking motives than on drinking-related problems.

교정치료와 관련된 치조골 높이 변화에 대한 연구

강경화,이경원,김상철 대한치과교정학회 2000 대한치과교정학회지 Vol.30 No.5

교정치료에 의해 빚어지는 치조골 소실의 정도를 좌,우측 제1대구치의 근,원심면에서 치료 전,후의 파노라마 필름을 이용하여 비교평가하고 치조골 소실에 미치는 영향 요소들을 알아보고자 하였다. 고정식 교정장치 치료를 받은 216명의 환자들은 104명의 성장군과 112명의 성인군으로 나뉘어 졌으며 4개 소구치의 발거가 이루어진 경우는 각각 50명씩이었다. 치료 전,후 파노라마 사진에서 상하 좌우 제1대구치의 근심 및 원심 부위의 치조골 높이를 백악법랑질경계에서 치조골의 최첨점까지 치아 장축에 평행하게 계측하여 다음과 같은 결론을 얻었다. 1.치료 시작시, 성인군은 성장군보다 유의하게 치조골 수준이 낮았다. 2.치료 후 치조골 수준은 치료 전 수준보다 유의하게 낮았다. 3.성장군과 성인군 간에 치조골 변화량의 유의한 차가 없었다. 4.성인발치군은 비발치군보다 유의하게 더 많은 치조골 소실을 모든 원심면에서 보였다. 5.상악은 하악보다 통계적으로 유의하게 더 많은 치조골 소실을 근심면에서 보였다. 6.성인군은 원심면에서 근심면보다 유의하게 더 많은 치조골 소실을 보였다. Alveolar crest is the section of interproximal alveolar bone which includes the free edge of the alveolar process. An increase of the normal forces within limits of tolerance leads to deposition of new bone. If forces are beyond the limits of tolerance, resorption of bone will result whether the force produces pressure or tension. This study was designed to evaluate changes of alveolar bone levels in mesial and distal surface of the left, right first molar, by using pre-treatment, post-treatment panorama films. Two hundreds sixteen subjects were divided into adolescent group of 104 subjects and adult group of 112 subjects, to which orthodontic treatment with a bicuspid extraction (adolescent group-50 subjects, adult group-50 subjects) or without a nonextraction (adolescent group-54 subjects, adult group-62 subjects) was applied by fried appliances. Pre- and post-treatment panorama films were traced, and alveolar crest height was measured. Amounts of changes in alveolar crest height by treatment were calculated and compared in terms of side of tooth, extraction, age. The results were as follows ; 1.When pre-treatment alveolar crest bone levels were compared, levels of adult group were significantlv lower than those of adolescent group. 2.Post-treatment alveolar crest bone levels were significantly lower than pre-treatment levels. 3.When changes of alveolar crest height were compared, between adolescent and adult group were not significantly. 4.When changes of alveolar crest height were compared, significantly larger changes were noticed in extraction than nonextraction cases. 5.When changes of alveolar crest height were compared, significantly larger changes were noticed in maxilla than mandible. 6.When mesio-distally compared, significantly larger changes were observed in the dictal than mesial sides of adult group.

골절제술을 이용한 급속 치아이동 후 치수 및 치주조직 변화에 관한 실험적 연구

강경화,김상철 원광대학교 치의학연구소 2002 圓光齒醫學 Vol.11 No.3

The movement of tooth-bone segment by osteotomy can move tooth and surrounding alveolar bone simultaneously in a relative short period. The purpose of this study was to evaluate the tissue changes in pulp, periodontal ligament, alveolar bone in rapid tooth-bone movement with osteotomey. The mandibular 3rd premolar of dog was extracted and cortical bones of buccal and lingual area were eliminated, and then cortical bones around mesial and distal area of root, and below of root apex, of mandibular 4th premolar were osteotomized. After 1 week of latency period, tooth-borne distraction device was activated for 6 days. And pulp, periodontal ligament and alveolar bone were evaluated clinically, radiologically, histologically and immunohistochemically at 0, 1, 2, 4, 6, 8 weeks of consolidation period and concluded as followings. 1. Latency period didn't affect total amount of tooth movement and healing process of tissue during consolidation period. 2. Bone formation continued through 8 weeks of consolidation in distracted side, with a high peak in 1-2 weeks, and the lowest in 6-8 weeks of consolidation. 3. At 1 week of consolidation, alveolar bone resorption, osteoclast appearance and inflammatory cell infiltration were the most active, and dentinoclast characteristically appeared in pulp and pressure side of periodontal ligament. 4. The expression of TGF-Β was area-specific, as it was strong-positive at bone matrix, osteoblast, osteoclast of alveolar bone, and dentinoclast inside pulp, but was weak in pulp, cementoblast and acellular cementum. 5. The expression of TGF-Β was generally observed at initial 1-2 weeks of consolidation at vessels, periodontal ligament cells, osteoblast near alveolar bone in distraction side of periodontal ligament, and was significantly decreased after 6 weeks of consolidation.

팔체질침을 이용한 반월판 관절경부분절제술 환자의 치험례

강영화,김성욱,손인석,서정철,윤현민,장경전 동의대학교 한의학연구소 2001 동의한의연구 Vol.5 No.-

슬관절은 지속적인 압력을 받거나 충격때문에 동작범위의 한계에 이를 때 손상받기 쉽다. 반월판 파열 환자는 일상생활에 지장을 주는 동통, 정복되지 않는 잠김, locking이나 giving way가 자주 일어나는 경우, 지속적인 신전제한이 있을 때 수술의 적응증이 된다. 반월판 파열 환자의 재활에 있어서 관건은 대퇴사두근의 근력과 ROM의 회복이다. 팔체질침 시술후 반월판 부분절제술을 시행한 환자가 동통의 강도와 동통 재발의 감소, ROM의 개선, 전반적 상태면에서 체침이나 MPS 시술 때보다 더 나은 경과를 얻었다. Knee joints are apt to be injured when they are over the limit of ROM by continuous pressure or impact. The patient of meniscus tear has to be operated in case that he has the symptom of knee pain obstructive to daily life, unreducable locking, frequent locking or giving way, continuous extention limit. In the rehabilitation of the patient of meniscus tear, the key is the progress of musculi quadratus femori's power and ROM. After 8 constitutional acupucture therapies, partial menisectomy patient has the better process about decrease of pain intensity and relapsing pain frequence, development of ROM, general condition more than general acupucture or MPS medical treatment.

경영선수의 체격·체력 및 기초 수영기능 성차에 관한 연구

신화경,강충식 公州大學校스포츠科學硏究所 1999 스포츠科學硏究所論文集 Vol.- No.13

This study is set out to examine the effecth that swimming race players' physique, physical strength and elementary skills have on different. and it's ultimate purpose is to improve both malc and female swimming race players' ability through analyzing the differences of their physique, physical and sex when they are trained for a long time. The analysis will lead to a conclusion about the essential factors regarding physique, physical strength of swimming race players The conclusion was made as follows after a two-year examination of 53 swimmers(all from the team representing South and North Churchgoing Province)' physique, physical strength and elementary swimming skills from both sexes. First, male swimmers excelled female counterparts in physique, physical strength, neuromuscular function and cardiorespiratory function female swimmers excelled in flexibility. Second, while female swimmers had better ability in treading water. male swimmers were better at under water swim, direction change swim, glide, floating score, treading water(with 2㎏) Third, the sexual difference of physical factors sosh as muscular strength and cardiorespiratory function caused the different swimming performance in buoyancy and flexibility which are crucial for achieving speed. Fourth, the sexual difference of physique of individual medley stroke was greatly influenced by height, girth and lean body mass when compared according to stroke styles. The difference was mot great for breast stroke. Fifth, flexibility and balance between both sexes in Butterfly stroke, individual medey stroke and Breast stroke, showing that it was the only skill which was differentiated between sexes.

중소기업의 산업안전교육 실태 조사 분석

이승환,이태우,강경식 明知大學校 産業技術硏究所 1999 産業技術硏究所論文集 Vol.18 No.-

It is said that a large part of losses by company is attributed to the loss manpower material resources by industrial accident. To alleviate industrial accident, machine-oriented safety supervision is superior to that of manpower-oriented in spite of diversified efforts, in many aspects. It will not secured a sense of safety if people can not utilize machines correctly despite excellent machines. As a part of preventing industrial accident, industrial safety education is aimed to improvement of productivity of company through exact research of actual condition of industrial safety education.

알러지성 비염 환자 107례에 대한 神鼻煎의 임상적 효과

김경렬,장현호,두인선,김남권,이종화,유영수,강형원 한국전통의학연구소 2002 한국전통의학지 Vol.12 No.1

Allergic rhinitis is characterized by rhinorrhea, sneezing and nasal obstruction. Allergic rhinitis increases because of developments of diagnostic techniqhe, environmental change, especially industrialization. Recently people have studied on allergic rhinitis. We studied 107 allergic rhinitis patients with SBJ from June. 2002 to December, 2002. There was a significant effect of SBJ on allergic rhinitis. So, we suggested the clinical effect of SBJ on allergic rhinitis.