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象牙質 表面處理가 글라스 아이오노머 시멘트의 邊緣漏出에 미치는 影響에 關한 硏究
趙正熙,洪燦義 단국대학교 치의학연구소 1992 논문집 Vol.4 No.-
The purpose of this study was to evaluate the effect of the dentin pretreatment on the marginal leakage of a glass ionomer cement. In this study, 60 molars with sound and healthy crown portion were used. The dentin surface of these teeth were exposd and polished with 600 grit silicon carbide paper. Square-shaped cavities were prepared on the flattened dentin surfaces and these were divided in to 4 groups according to the dentin pretreatment procedures. Group Ⅰ : Dentin pretreatment with distilled water as a control group. Group Ⅱ : Dentin pretreatment with 5% sodium hypochlorite solution. Group Ⅲ : Dentin pretreatment with Ketac conditioner. Group Ⅳ : Dentin pretreatment with 40% polyacrylic acid. The degrees of dye penetration in the cavity walls were assessed using a stereoscope at x40 magnification according to the maximum dye penetration. The results were analyzed by using Mann-Whitney U test. The results were as follows : 1. All goups showed varying depth of dye penetration. 2. Distilled water group showed the most severe marginal leakage when compared with the other groups(P<0.05). 3. 40% polyacrylic acid group showed the least amount of marginal leakage compared with the other groups(P<0.05). 4. There were significant differences between Group Ⅰ(distilled water) and Group Ⅳ (40% polyacrylic acid)(P<0.05), but there were no significant differences among Group Ⅰ (distilled water), Group Ⅱ (5% sodium hypochlorite), Group Ⅲ (Ketac conditioner)(P>0.05)
자가 산부식 프라이머 시스템 사용시 인산에 의한 부가적인 산부식이 미세누출에 미치는 영향
윤정진,민경산,홍찬의 大韓齒科保存學會 2003 Restorative Dentistry & Endodontics Vol.28 No.5
The purpose of this study is to evaluate the effect of additional enamel etching with phosphoric acid on the microleakage of the adhesion of self-etching primer system. Class V cavity(4mm × 3mm × 1.5mm) preparations with all margins in enamel were prepared on buccal surface of 42 extracted human upper central incisor teeth. Prepared teeth were randomly divided into 3 groups. Group 1:no additional pretreatment with 37% phosphoric acid (NE). Group 2:additional pretreatment with 37% phosphoric acid for 10 seconds (E10s). Group 3:additional pretreatment with 37% phosphoric acid for 20 seconds (E20s). The adhesives(Clearfil SE Bond, Kuraray, Osaka, Japan) and composite resins(Clearfil AP X, Osaka, Kuraray, Japan) were applied following the manufacturer's instructions. All the specimens were finished with the polishing disc(3M dental product, St Paul, MN, USA), thermocycled for 500 cycles between 5℃ and 55℃ and resected apical 3mm root. 0.028 stainless steel wire was inserted apically into the pulp chamber of each tooth and sealed into position with sticky wax. Surrounding tooth surface was covered with a nail varnish 2 times except areas 1mm far from all the margins. After drying for one day, soaked the samples in the distilled water. Microleakage was assessed by electrochemical method(System 6514, Electrometer, Keithley, USA) in the distilled water. In this study, the microleakage was the lowest in group 1 (NE) and the highest in group 3(E20s)(NE<E1Os<E20s). But no statistically significant differences were found(p =0.5) On the basis of findings from this experiment, it can be concluded that additional enamel etching has nc influence on the microleakage of the adhesion of self etching primer system.
朴龍泰,黃正儀,鄭倧在,呂壽東,洪錫 慶北大學校 文理科大學 1979 文理學叢 Vol.6 No.-
Several model compouds for photocyclization of alkaloids were synthesized. When benzanilide was irradiated with UV lamp in quartz photocell, surprisingly 2-aminobenzophenlone and 4-aminobenzohpenone were produced as a Photo Fires reaction, However, when the benzanilide was irradiated in Pyrex photocell, the expected photoclic-compound, phenanthridone was appeared. Orthosubsitituted benzanilides in Pyrex photocell also gave 8-subsituted-9-oxy-phenanthridines. Thus, the dihydrophenanthridone was assumes as intermediate of the photocyclization of benzanilides as model for alkaloid photocyclization reaction.
척추 전이성 종양의 수술적 치료 : 삶의 질에 대한 평가를 중심으로 focused in evaluation of life quality
양준영,이준규,홍의표,안성환,이정범 충남대학교 의학연구소 2003 충남의대잡지 Vol.30 No.2
목적 : 척추에 발생한 전이성 종양 환자들을 대상으로, 수술적 치료를 시행한 환자에 있어서, 술후 생존 기간과 생존 기간 내 동통, 신경학적 증상, 일상 생활 능력 등의 평가를 통한 수술적 치료의 결과에 대하여 보고하고자 한다 . 연구대상 및 방법 : 1996년부터 1999년까지 본원에서 전이성 종양으로 수술적 치료를 받았던 환자중 추시가 가능했던 13례의 환자를 대상으로 하였으며 술 후 생존 기간 및 술 전 및 술 후 추시 중의 동통 양상 및 신경학적 증상의 호전여부, 일상 생활 수행 능력을 분석하였다 . 결과 : 전례에서 술 전 동통을 호소하였으며, 1례에서만 단독 보행이 가능하였고, 1례에서는 앉는 것만 가능하였으며, 11례에서는 앉지도 못하였다. 술 후 평가에서는 전례에서 동통이 감소하였으며, 술전에 신경학적 증상이 보였던 환자 중 75%에서 신경학적 증상이 호전이 나타났으며, 대상환자 중 92%에서 자가 보행이 가능하거나, 앉는 것이 가능하게 되었다. 사망한 환자의 술후 생존기간은 평균 11.2 개월이었다. 결론 : 수술적 치료를 받은 척추의 전이성 골종양 환자에서 술 후 신경학적 증상의 호전, 동통의 감소 및 보행 능력의 호전을 볼 수가 있었다. 따라서 척추의 전이성 종양 환자에 있어, 수술의 적응증이 된다면 수술적 치료를 적극적으로 시행하는 것이 환자의 삶의 질을 향상시킬 수 있다고 사료된다. To evaluate the clinical results of surgical treatment in metastatic spinal tumor patients. Thirteen patients of spinal metastatic tumor, treated by surgical methods, in this hospital from 1996 to 1999, were included in this study. We analysed pre and post operative pain, neurologic symptom and life quality. Preoperatively, all patients complained of pain and one case do could self walking, one case could do self sitting, and eleven patients were bed-ridden states. Postoperatively, pain was subsided in all cases. Neurologic symptom recovered in 75% of patients who had had preoperative neurologic symptoms. Postoperatively, patients walk or sit without assistance in 92% of cases. Mean postoperative span of survival was 11.2 months. Surgical treatment of spinal metastatic tumor improved the neurologic status and reduced pain. So, we conclude that if indicated, surgical treatment seems to achieve better results than conservative treatment in spinal metastatic tumor patient.
朴龍泰,黃正儀,鄭倧在,呂壽東,洪錫 慶北大學校 物理化學硏究所 1981 硏究論文集 Vol.1-2 No.-
Several model compounds for photocyclization of alkaloids were synthesized. When benzanilide was irradiated with UV lamp in quartz photocell, surprisingly 2-aminobenzophenlone and 4-aminobenzophenone were produced as a Photo-Fries reaction. However, when the benzanilide was irradiated in Pyrex photocell, the expected photocyclic compound, phenanthridone was appeared. Orthosubstituted benzanilildes in Pyrex photocell also gave 8-substituted-9-oxyphenanthridines. Thus, the dihydrophenanthridone was assumed as intermediate of the photocyclization of benzanilides as model for alkaloid photocyclization reaction.
A hybrid technique for sinus floor elevation in the severely resorbed posterior maxilla
Jung, Ui-Won,Hong, Ji-Youn,Lee, Jung-Seok,Kim, Chang-Sung,Cho, Kyoo-Sung,Choi, Seong-Ho Korean Academy of Periodontology 2010 Journal of Periodontal & Implant Science Vol.40 No.2
Purpose: This study aimed to evaluate the effectiveness of the modified sinus floor elevation technique described hereafter as a "hybrid technique," in 11 patients with severely resorbed posterior maxillae. Methods: Eleven patients who received 22 implants in the maxillary premolar and molar areas by the hybrid technique were enrolled in this study. A slot-shaped osteotomy for access was prepared on the lateral wall along the lower border of the sinus floor. The Schneiderian membrane was fully reflected through the lateral slot. Following drilling with the membrane protected by a periosteal elevator, the bone was grafted. All implants were placed simultaneously with sinus augmentation. The cumulative success rate was calculated and clinical parameters were recorded. Radiographic measurements were performed. Results: All implants were well maintained at last follow up (cumulative success rate=100%). The mean residual bone height, augmented bone height, crown-to-implant ratio, and marginal bone loss were $4.1{\pm}1.64mm$, $8.76{\pm}1.77mm$, $1.21{\pm}0.34mm$, and $0.34{\pm}0.72mm$, respectively. Conclusions: Simultaneous implant placement with sinus augmentation by hybrid technique showed successful clinical results over a 2-year observation period and may be a reliable modality for reconstruction of a severely resorbed posterior maxilla.
분급된 굴 패각을 잔골재로 사용한 모르타르의 강도특성에 관한 연구
정의인 ( Jung Ui-in ),홍상훈 ( Hong Sang-hun ),최인권 ( Choi In-kwon ),김봉주 ( Kim Bong-joo ),원철희 ( Won Chul-hee ),박정훈 ( Park Jung-hun ) 한국건축시공학회 2016 한국건축시공학회 학술발표대회 논문집 Vol.16 No.2
Oyster shell is produced by shucking process in oyster farming in southern coast of Korea. In average, about 6.7kg of oyster shell is produced as an industrial waste for 1kg of oyster flesh, and even only in last year, it is estimated that about 150,000 ton of oyster shell is produced. Oyster shell is light weighted and its strength characteristic is similar to sand. So we produced mortar test piece using grounded oyster shell powder under 0.6mm, 0.6~1.2mm, 1.2~2.5mm, 2.5~5.0mm of its particle size according to fine aggregate standard and reviewed strength Properties.