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김영림,박주미,송광엽,Kim, Young-Rim,Park, Ju-Mi,Song, Kwang-Yeob 대한치과보철학회 2007 대한치과보철학회지 Vol.45 No.4
Statement of problem: Die materials require abrasion resistance, dimensional stability with time, and high surface wettability for adequate material properties. Wear of gypsum materials is a significant problem in the fabrication of accurately fitting cast prosthetic devices. So It has been recommended that the use of die hardener before carving or burnishing of the wax pattern. Purpose: The purpose of this study was to compare the abrasion resistance and surface microhardness(Knoop) with 3 commonly used gypsum die materials(MG Crystal Rock, Super plumstone, GC $FUJIROCK^{(R)}$ EP) with and without the application of 2 die hardeners. Material and methods: Three die materials were evaluated for abrasion resistance and surface microhardness after application of 2 die hardeners(Die hardener and Stone die & plaster hardener). Thirty specimens of each gypsum material were fabricated using an impression of resin die(Pattern resin; GC Corporation, Japan) with 1-mm high ridges, sloped 90 degrees. Gypsum materials were mixed according to manufacturer's recommendations and allowed to set 24 hours before coating. Specimens were arbitrary assigned to 1 of 3 treatment subgroups (n=10/subgroup): no treatment(control), coated with Die hardener, and coated with Stone die & plaster hardener. Abrasion resistance(measured by weight loss) was evaluated using device in 50g mass perpendicular to the ridges. Knoop hardness was determined by loading each specimen face 5 times for 15 seconds with a force of 50g. A scanning electron microscope was used to evaluate the surface of specimens in each treatment subgroup. Conclusions: The obtained results were as follows: 1. 3 types of die stone evaluated in this study did not show significant differences in surface hardness and abrasive resistance(P<.05). 2. In the abrasive resistance test, there were no significant differences between GC $FUJIROCK^{(R)}$ EP and MG Crystal Rock with or without 2 die hardener(P<.05). 3. Super plumstone treated with Stone die & plaster hardener showed increased wear loss(P<.05) 4. Die hardener coatings used in this study decreased the surface hardness of the gypsum material(P<.05).
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김영림,경희문,성재현 대한치과교정학회 1995 대한치과교정학회지 Vol.25 No.2
한국인에게 적합한 설측교정장치와 이상적인 설측 치열궁 아치와이어 제작의 기초자료를 얻기위하여 정상교합자 경석고 모형 30개를 재료로 하여 설측치관의 형태와 후지타 설측 브라켓을 위치시킨 모형에서 설측치열궁 형태를 조사하여 다음과 같은 결과를 얻었다. 각 치아에 대한 치관의 근원심 경사도와 설면의 순설측 치관 경사도의 평균치를 얻었다. 각 치아에 대한 브라켙 위치에서 설면의 수평 및 수직적 형태를 얻은 결과 대구치, 소구치, 견치는 상하악이 비슷한 모양을 보였으며, 상하악의 중절치와 측절치도 비슷한 모양을 보여 각각 브라켓 기저부를 공유할 수 있을 것으로 나타났다. 브라켙 부착위치에서의 평균 설측치열궁 형태를 얻은 결과, 그 형태는 전치부는 반원형이며 견치와 소구치 사이에 강한 오프셑 밴드가 있는 버섯 형태로서 소구치간 및 제2소구치 와 대구치간에도 오프셑 밴드가 필요한 것으로 나타났다. 남녀간의 평균 설측치열궁 형태는 상악은 거의 일치하였고 하악은 여자가 남자보다 다소 작은 형태를 나타내었다. The purpose of this study was to obtain the lingual morphology(angulation, inclination, horizontal and vertical contour) and lingual arch form of Korean adult with normal occlusion in order to provide the basic datas for lingual brackets and ideal lingual archwire. Dental models of thirty person with normal occlusion(Male : 16, Female : 14) were selected for this study. Crown angulation, inclination, horizontal and vertical contour of lingual surfaces from Lt. 1st molar to Rt lst molar of both upper and lower arch were measured. Lingual archform was studied from copied papers of dental models attached Fujita lingual bracket. The results of this study were summarized as follows : 1. The average angulation and inclination of lingual surfaces of all tooth types for Korean adults with normal occlusion were obtained. 2. The average horizontal and vertical contour of lingual surfaces of all tooth types were obtained. 3. There were similar figures in horizontal and vertical contour of lingual surfaces between upper and lower molars, upper and lower premolars, upper and lower canines, upper central and lateral incisors and lower central and lateeral incisors respectively. It was possible that the use of those contour of bracket bases in common. 4. The average of lingual archform was provided, which was arch-shaped from canine to canine, linear along the premolars and molars with small offset bend between them, and where canines and premolars met, it was bent in a crank-shape. 5. There was no difference between lingual archform of male and that of female, although lingual arcform of female was smaller than that of male in lower arch.
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김영림,이승연 한국심리학회 산하 한국발달심리학회 2017 한국심리학회지 발달 Vol.30 No.4
The present study identified the personal and familial variables related to relational victimization of girls and functioning mechanisms of these variables. For this, maternal rejective parenting was set as a familial variable, and trait anger and gender role traits were set as personal variables. Moreover, the mediating roles of trait anger, agency, unmitigated agency, communion, and unmitigated communion in the relationship between maternal rejective parenting and girls’ relational victimization were examined through structural equation modeling. A total of 815 elementary school girls in 5th and 6th grades sampled from fourteen elementary schools participated in this study. The results indicated that although maternal rejective parenting had significant direct effects on all the mediating variables included in the model, unmitigated communion was the only mediator showing a significant mediating effect. That is, maternal rejective parenting made girls vulnerable to relational victimization by developing unmitigated communion. Based on these findings, effective prevention/intervention strategies for reducing girls’ victimization of relational aggression were discussed. 본 연구는 여학생의 관계적 공격성 피해와 관련된 개인적․가족적 변인을 확인하고 변인들간의 작용 기제를 이해함으로써 개입의 이론적 근거를 마련하고자 하였다. 이를 위해 가족적 변인으로는 어머니의 거부적 양육행동을, 개인적 변인으로는 특성분노와 성역할특성을 설정하고, 어머니의 거부적 양육행동이 여학생의 관계적 공격성 피해를 예측하는 데 있어서, 특성분노와 친화성, 주도성, 경직된 친화성, 경직된 주도성이 매개적 역할을 하는지 구조방정식 모형 검증을 통해 확인하였다. 이를 위해 서울 소재 초등학교 5, 6학년 여학생 815명(5학년 386명, 6학년 429명)의 자기보고식 설문지를 수집하여 분석을 실시하였다. 분석 결과, 어머니의 거부적 양육행동은 설정된 모든 변인들에 유의한 영향을 미치지만, 유의한 매개적 역할을 하는 것은 경직된 친화성뿐인 것으로 나타났다. 즉, 어머니의 거부적 양육행동은 여학생의 경직된 친화성을 증가시킴으로써, 관계적 공격성 피해에 취약하도록 하였다. 이러한 결과에 기반하여 여학생의 관계적 공격성 피해를 경감시킬 수 있는 예방 및 개입 전략에 대해 논의하였다.
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