BILATERAL TWO-ROOTED MANDIBULAR CUSPIDS

김성교,Kim, Seong-Gyo 대한치과의사협회 1993 대한치과의사협회지 Vol.31 No.9

양측성 2치근 하악견치의 증례를 보고한다. 근관치료술식을 합리적으로 시행하기 위해서는 치아 내부구조에 관한 정확한 지식이 필수적으로 요구되고, 근관술식을 하는 동안에는 하악 견치가 2개의 독립적인 치근을 가질 빈도에 대해 고려햐여야 한다. 그리고 근관치료가 예기치 않게 실패하였을 경우, 2개의 근관계나 존재한 가능성에 대해 생각해 보아야 한다.

심미성과 내구성

김성교 대한치과의사협회 1990 대한치과의사협회지 Vol.28 No.10

흙의 물리적 성질이 다짐에 미치는 영향

김성교,김문기 한국농공학회 1976 한국농공학회논문집 Vol.18 No.3

This study is to investigate the effect of some physical properties of soil on the compaction. The compaction effect depends upon various factors such as soil type, moisture content, gradation and compaction energy. In this study, with steady compaction energy, the relationships between maximum dry density and moisture content, gradation and consistency were analyzed by soil types. Some results obtained in this study are summarized as follows 1. Generally, the coarser the grain size, the bigger is the maximum dry density and the smaller is the optimum moisture content and its moisture-dry denisty curve is relatively steep. The finner the grain size, the smaller is the max. dry density and the bigger is the opt. moisture content and its moisture-dry density curve is less steep. 2. The relationship between max. dry density (${\gamma}$dmax) and opt. moisture content, void ratio, clay content, percent passing of No. 200 sieve, liquid limit and plastic limit can be represented by the equation ${\gamma}$dmax =ao+a1X(a0>0, a1<0) 3. The relationship between opt. moisture content (Wopt) and clay content, percent passing of No. 200 sieve, liquid limit and plastic limit can be represented by the equation Wopt=a0+a1X(a0>0, al>0). 4. The fact that maximum dry density of the compacted soil is decreased with the increase of the optimum moisture content in any types of soil tested, and the fact that optimum moisture content can be positively correlated with clay content, percent passing of No. 200 sieve, liquid limit and plastic limit of the soil, lead to the conclusion that clay content, percent passing of No. 200 sieve, liquid limit and plastic limit of the soil are direct factors in reduction of the maximum dry density of engineering soil.

와연 마무리기구가 Glass-Ionomer Cement 수복물의 변연 폐쇄능에 미치는 영향

김성교 慶北大學校 齒科大學 1989 慶北齒大論文集 Vol.6 No.3

The purpose of this study was to evaluate the marginal sealing ability of glass-ionomer cement restoration according to cavity margin finishing instruments by means of dye penetration at the enamel and dentinal margins. Fifty class Ⅴ cavities were prepared with No.58 carbide fissure burs on the buccal and lingual surfaces of twenty five extracted human molar teeth, which divided into five groups. The cavity margins of control group were not finished, and those of our experimental groups were finished with one of the followings ; gingival margin trimmer(Hu-Friedy, U. S. A), regular diamond bur, fine diamond bur, or superfine diamond bur(Shofu, Japan). The cavities were filled with Ketac-Fil(Espe, Germany), a kind of glass-ionomer cement for filling. All specimens were immersed in 2% methylene blue solution of 37℃ for 24 hours after thermocycling between 4℃ and 60℃, and logitudinally sectioned with diamond discs into two parts. The marginal sealing abilities according to the cavity margin finishing instruments were evaluated by means of measuring the depth of dye penetration at the enamel and dentinal margins. The results were as follows ; At the enamel margins, the marginal sealing ability of the group finished with gingival margin trimmer was superior to that of the group finished with fine diamond bur(p<0.05), and the marginal sealing ability of the group finished with regular diamond but was superior to that of the group finished with fine diamond bur or superfine diamond bur(p<0.01). But there was no significant difference among the other experimental groups, or between the control group and each experimental groups(p>0.05). At the dentinal margins, there was no significant difference among all the groups tested(p>0.05). Commonly in all the groups tested, the marginal sealing abilities at the enamel margins were superior to those at the dentinal margins(p<0.01).

중학생의 가정과교사 특성지각과 가정과 수업을 통한 인성적 도덕성

김성교,채정현 대한가정학회 2003 Family and Environment Research Vol.41 No.10

The purpose of this study is to investigate the relationship between home economics teachers' characteristics and middle school students' affective morality through Home Economics Instruction. The affective morality of middle school students after taking home economics classes were assessed and investigated as to what sorts of affective morality there were and to find out what level they were. Further, what factors affected the affective morality of middle school students considering the variable factors of home economics teachers. 800 first year male and female students of 17 middle schools located in Cheonju and Cheongwon were selected through non-random or accessible sampling. The frequency, precent, mean and standard deviation, correlation, t-test, and one-way ANOVA, and multiple regression of these data were obtained by using the SPSS 10.0 for Windows Program. The result of this study were as follows: First, basic etiquette was the most important rated the highest among the affective morality, nature preservation turned out the lowest in each questionnaire. Learned in home economics, it was considered the highest goal; Second, in terms of character and affective morality of middle school students, male students ranked higher than female students and the students with a better academic performance record, and those who engaged in club activities showed better results in affective morality as did students with religious beliefs and students with better educated parents and also students from homes with better financial situations. Third, in terms of students' perception of home economics teachers with a good nature turned out the highest, teaching ability and career awareness and also reflected at the m e level. Fourth, students' perception of home economics teachers' characteristics and their affective morality are turned out correlated with each other. The correlation of home economics teachers' career awareness and compassion . devotion . service morality proved to be the highest. Fifth, the affective morality of those students who do community service, club activities and those who are interested in home economics and who respect home economics teachers tended to be high.

광중합 Glass-ionomer 이장재의 산 부식이 복합레진과의 접착에 미치는 영향

김성교 慶北大學校 齒科大學 1991 慶北齒大論文集 Vol.8 No.1

The purpose of this study was to evaluate the influence of acid etching on the bonding of a composite resin to a light-curing glass-ionomer. After 68 specimens of Vitrabond, a light-curing glass-ionomer were cured in acrylic resin blocks, the specimen surfaces were grinded with 320-grit silicone carbide papers. The specimens were divided into 4 groups, 1 control and 3 experimentals according to the etching period. While specimen surfaces were etched for 15, 30 or 60 seconds with 37% phosphoric acid in the experimental groups, those of the control group were not etched. Scotchbond/Silux, a composite resin was bonded to the treated glass-ionomer surfaces. After each specimen was stored in distilled water at 37℃ for 7 days, shear bond strength was measured. Surface state of each group and failure mode of each specimen were examined under a scanning electron microscope. Correlation between the shear bond strength and the adhesive failure rate was evaluated also. The results were as follows: Acid etching procedure did not increased bond strength, but decreased it. Many voids of 30㎛ in size were found in the unetched glass-ionomer specimens, the size of voids and exposed area of large particles were increased with increasing etching period and small particles of 0.5-0.8㎛ in size were lost. Failure mode of bonded specimens showed more than 50% of adhesive failure rate, and the rate was increased with etching period. There was negative correlation between the bond strength and the adhesive failure rate, but it was weak(r=-0.28). J. Kyungpook Nat. Univ. Sch. Dent. Vol.8, No.1, 1∼17, 1991.

수술현미경을 도입한 근관치료의 의의

김성교 대한치과의사협회 1997 대한치과의사협회지 Vol.35 No.3

고양이 치수에서 교감신경에 의한 미세순화조절에 관한 기능적 연구

김성교 大韓齒科保存學會 1996 Restorative Dentistry & Endodontics Vol.21 No.1

초음파 다이아몬드 기구로 형성된 치근단 역충전 와동의 정화도 및 와벽형태

김성교,임춘희,권태경 大韓齒科保存學會 1998 Restorative Dentistry & Endodontics Vol.23 No.1

The purposes of this study were to observe the cavity wall morphology and to evaluate the degree of cavity cleanliness when root-end retrograde cavity preparation was done with ultrasonic diamond instruments. To observe the morphology of retrocavity and to evaluate the degree of cavity cleanliness, root-end resections were done on 20 palatal roots of extracted maxillary first molars after canal filling with gutta-percha. Retrocavities were prepared using either ultrasonic diamond instruments of stainless steel ones of medium power setting of level 6 (MIniendo™, EIE, CA, U.S.A), Morphology of the cavity, degrees of the remaining canal debris and smear layer were evaluated under the scanning electron microscope. The results were as follows: Cavities prepared with ultrasonic diamond instruments showed scratched appearance of wall, while ultrasonic stainless steel preparation showed hatcheted appearance. Ultrasonic diamond instruments induced mord smear layer than stainless steel ones did(p<0.01) in the cavity. However, there was no significant difference in canal debris(p>0.05).

감사성향 함양을 위한 중학교 가정과 인성교육 교수⋅학습 과정안 개발 및 수업 적용의 효과 분석

김성교,왕석순 한국가정과교육학회 2011 한국가정과교육학회지 Vol.23 No.2

The purpose of this study was to determine the possibility of character education in the middle school home economics program: by extracting learning factors that can cultivate gratitude disposition from the eighth grade in the unit of ‘clothing life’ of middle school HE text, developing five teaching-learning lesson plans and learning materials, and applying them in classrooms to see any changes in gratitude disposition standards before and after its application. Five teaching-learning lesson plans for the cultivation of gratitude disposition were developed, and completed after three experts in home economics verified their validity and revised them. From June 1, 2010 to June 30, 2010, five classes were taught to 210 eighth grade students at a Gyeongbuk Junior High School, and gratitude dispositions were investigated before and after the classes. Gratitude disposition standards used GQ-6, like McCullough, and for before-and-after-inspection comparison, t-test and analysis of open-ended questionnaires were carried out. The results proved the instruction effective. Before the class for the cultivation of gratitude disposition, students had a gratitude disposition average of 2.87(out of 5). After the class, the average was 3.35, which shows that students had improved considerably. Also, in analysis of a open-ended questionnaire, it was said that the class had been provided the opportunity to think about the value of nature and neighbors and that the class content reminded them about appreciation. In conclusion, for the character education in other areas of middle school home economics, teaching-learning lesson plans development must be attained to further this character education program. 본 연구는 가정교과에서 인성교육의 가능성을 확인하고자 중학교 2학년 기술⋅가정 교과서 의생활 단원에서 감사 성향을 함양시킬 수 있는 학습요소를 추출하여 5차시 인성교육 교수⋅학습 과정안과 학습자료를 개발하고, 수업에 적용하여 학습 전후에 감사 성향 수준에 변화가 있는지를 알아보고자 하였다. 감사 성향 함양을 위한 교수⋅학습 과정안 5차시 분을 개발하여 가정교육 전문가 3인에게 타당도를 검정 받아 수정 후 완성하였으며, 이후 경북 소재의 모 중학교 2학년 학생 210명을 대상으로 2010년 6월 1일부터 2010년 6월 30일까지 5차시 수업을 진행한 후 수업 전후 감사 성향 수준을 조사하였다. 감사 성향 척도는 McCullough 등의 GQ-6를 이용하였으며 사전⋅사후 검증 비교를 위해 대응표본 t검증과 개방형 질문에 대한 분석을 실시하였다. 분석결과, 감사 성향 함양을 위한 수업 전 학생들의 감사 성향의 평균은 2.87(5점 만점)이었으나, 수업 후 감사 성향 평균은 3.35로 향상되었고, 이것은 통계적으로 유의한 차이였다. 따라서 감사 성향 함양을 위한 가정과의 수업이 효과적임이 판명되었다. 개방형 질문 분석에서도 수업을 통해 평소 생각하지 못했던 주변사람과 자연을 소중하게 생각할 수 있는 기회를 가지게 되었으며, 감사하는 마음을 되새길 수 있는 수업내용 구성이 좋았다고 하였다. 따라서 이후 연구에서는 감사 성향 이외의 다른 긍정적 정서와 친사회적 능력을 기르는데 기여할 수 있는 가정과 인성교육용 교수⋅학습 과정안이 개발되어야 할 것이며, 의생활 이외의 다른 영역에서 지속적으로 교수⋅학습과정안의 개발이 이루어져야 할 것이다.