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전라북도 치과기공사들의 호흡기계 건강에 관한 조사연구(1993년도와 2001년도 비교연구)
최운재,신무학,이인규,정희선 대한치과기공학회 2002 대한치과기공학회지 Vol.24 No.1
The purpose of this study was to examine the respiratory system health condition of dental technicians and tobe of use for more successful health management and health promotion for them. The subjects in this study were155 dental technicians who were working in North Jeolla province. Out of them, 70 dental mechanics wereinvestigated in 1993, and 85 were surveyed in 2001. And the reports of the two groups on respiratory distress,including cough, sputum, phlegm, the notable sound of breathing, nasal discharge, coryza, shortness of breath andgasping, were compared. The findings of this study were as below:1. The cough report rate was 24.3% in 1993 and 16.5% in 2001. There appeared approximately 7.8% decreasebetween the two years. The most powerful variables included working hours and age.2. The complaint rate of sputum and phlegm was 47.1% in 1993 and 43.5% in 2001. The rate of 2001 reducedby 3.6%. Whether or not they smoked was identified as the most influential variable.3. The report rate of shortness of breath and gasping was 7.4% in 1993 and 12.9% in 2001, and this rateshowed about 1.5% increase in the latter year. The biggest variables were working hours and career.4. The complaint rate of nasal discharge and coryza was 41.4% in 1993 and 44.7% in 2001, which showedabout 3.3% increase. The largest variables were smoking and career.5. The report rate of the notable sound of breathing and breathing in light little gasps was 12.0% in 1993 and17.6% in 2001. There was approximately 5.6% increase, and the most powerful variables were working hours andcareer.
한국(韓國) 치과기공소(齒科技工所) 운영상(運營上) 문제점(問題點)과 개선방안(改善方案)에 관(關)한 조사(調査) 연구(硏究)
최운재,Choi, Un-Jae 대한치과기공학회 1996 대한치과기공학회지 Vol.18 No.1
The purpose of this to inquire of the people who run a dental mechanical laboratory having troubles to manage and to find out the reform measures on the point at issue. With having done random sampling for the chiefs of dental mechanical labs across the nation, and then marking the analysis of the data for the survey, I came to a conclusion to be as follow. 1. The operating problems in dental mechanical laboratory in Korea is that it is too near at hand that the requested days for the manufacture of dental prosthesis appliances form dental clinics(45%)(P<0.01) 2. The problem of dental mechanic manpower was due to a small salary and inferior working environment(35% each)(P<0.01) 3. Some of them discount dental mechanical charges in manufacturing dental prosthesis appliances(36.7%)(P<0.01) 4. Many of them employed unlicensed dental technicians(61.7%)(P<0.01) As a counterplan for the aforementioned, I think that the whole dental mechanics should cooperate in breaking off the customary custom to allow a discount on the dental mechanical charges and readjust the dental mechanical charge to a realistic level so as to contribute to the development of the dental mechanical community and the vetterment of the public oral hygience.
치과 도재용착 주조관용 비귀금속 합금의 반복주조가 기계적 특성 및 미세조직에 미치는 영향
최운재,신무학,정희선,고명원 대한치과기공학회 2003 대한치과기공학회지 Vol.25 No.1
Using a nickel-chrome casting alloy called 'Rexillium V' which is also available as base metalalloy for dental ceramic crown, 4 types of mixtures(A, B, C, D) with old and new metal wereprepared for cyclic casting. The results of cyclic casting can be outlined as follows: 1. For Vickers hardness after casting, specimen A and D tended to have lower hardness in thecourse of cyclic casting, while specimen B and C tended to higher hardness. 2. The results of X-ray diffraction analysis showed that major crystal phase contained nickel-chrome compounds and carbide. 3. The observation results of SEM photographs after cyclic casting show that there was asignificant tendency to have similar structures among experimental groups. 4. The results of EDX analysis after cyclic casting showed that there were little differences inchemical composition between parent metal and base metal alloy.Although industrial nickel-chrome cast alloy did not show any significant change in materialproperties even through cyclic casting over several times, it is recommended that more there bemore in-depth studies on how to detect any potential corrosion, discoloration and toxication ofdental ceramic crown implanted in patient's oral cavity.
대학생들의 생활습관이 시력에 미치는 영향에 관한 연구 - 치기공과 재학생을 중심으로 -
최운재,전정자,Choi, Un-Jae,Jun, Jeong-Ja 대한치과기공학회 2010 대한치과기공학회지 Vol.32 No.4
Purpose: The purpose of this study was to examine the eyesight and life habits of college students in an attempt to provide some information on the protection of their eyesight. Methods: The subjects in this study were 311 students in the department of dental technology at a college of health, on whom a survey was conducted. A crosstabulation analysis was carried out to show the joint distribution of general characteristics and several variables involving the use of glasses or contact lenses and life habits. Results: 77.5% of the students currently wore glasses due to weak sight. 9.3% took an eye test on a regular basis, and 31.2% did that every six months. As for the length of the length of daily mean reading time, 55.3% spent one hour or less reading books. The most common distance between eyes and books during their reading(44.7%) was 21 to 25. Concerning a reading posture, the biggest group(54.3%) lay down or lay on their face while they read books. 45.0 % spent less than an hour watching TV per day on average, and 27.0% were on the computer for 30 minutes to less than an hour per day on average. The greatest group(63.0%) made use of basic indoor lighting when they were on the computer at night, and 62.1% saw eye doctors to take an eye test. In relation to how to protect eyesight, the biggest group(50.5%) spent less time being on the computer. Conclusion: As the eyesight of college students fails due to reading, TV, computer, and improper ways and posture of doing or using those things, every college definitely should provide education on eye health as one of general education courses.
한국(韓國) 치과기공사(齒科技工士)들의 전문대학(專門大學) 치기공과(齒技工科) 교육(敎育)에 대한 의식구조(意識構造) 조사(調査) 연구(硏究)
최운재,Choi, Un-Jea 대한치과기공학회 1997 대한치과기공학회지 Vol.19 No.1
This survey aimed at the analysis of the consciousness of the dental technicians on the college education ; 205 dental technicians who graduated the relavant school answered. Following is the result of the analysis with its ststistcal number. 1. About the time when they chose their major, 84 people(41.1%) answered the prepartion period for the college. And, 74(36.1%) said that they applied on their own thought to their major. The reason why they chose it was first the prosperity expected in the near future, 93(45.4%) replied. 2. 161(78.5%) were satisfied with their college days. On the other hand, the most regretful one those days, 69(33.7%) answered, was the scarcity of the study seminar. 3. About the exercise courses, 120(58.6%) showed dissatisfaction, and 66(32.3%) people of the dissatisfied pointed out the lack of the instruments. 4. The suitable number in a class, 124(60.5%) supported, is 20 heads. The appropriate period of education was said three years by 71(34.6%), four years 53(25.9%) and the extension to the graduate school by 41(20.0%) 5. About the tips for the professors, 147(71.7%) proposed they would research and lecture further more. To the college administration, 116(56.5%) suggested it should accomo-data enough instruments for practicing.