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- 저자 : 남기영(Ki-Young Nam) (검색결과 85 건)
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견봉하 점액낭염에서 초음파 하 증식과 국소 스테로이드 병합 주사 요법
남기영,문영래,Nam, Ki Young,Moon, Young Lae 대한정형외과초음파학회 2008 대한정형외과 초음파학회지 Vol.1 No.1
Purpose: To investigate the effectiveness of injection therapy in the treatment of subacromial bursitis. Materials and Methods: A total of 38 patients with sonographic confirmation of subacromial bursitis were recruited into this study. The shoulder abduction range of motion and visual analog scale (VAS) were compared before injections and 3 wks after the completion of injections. Results: The shoulder range of abduction before injection was $77.89{\pm}14.17$ degrees and improved to $148.68{\pm}13.39$ degrees 3 wks after the injection treatments (P<0.05). VAS before injection was $6.8{\pm}1.4$ and improved to $1.4{\pm}0.8$ 3 wks after the injection treatments (P<0.05). Conclusions: Ultrasound may be used as an adjuvant tool in guiding the needle accurately into the inflamed subacromial bursa. The ultrasound-guided injection technique can result in significant improvement in shoulder abduction range of motion in treating patients with subacromial bursitis.
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남기영,문영래,양경호,Nam, Ki Young,Moon, Young Lae,Yang, Kyung Ho 대한정형외과초음파학회 2008 대한정형외과 초음파학회지 Vol.1 No.1
Purpose: To evaluate the efficiency of needling and injection technique without steroid for symptomatic calcific tendinitis of the shoulder. Material and Methods: We chose 12 symptomatic calcific tendinitis patients, whose ages ranged from 35 to 64. Procedure ware dry needling and injection of prolotherapic agent near the lesion. Results: All the case revealed prominent improvement without limitation of shoulder function, especially in active painful stage. Conclusion: Sonographic injection technique for calcific tendinitis would be one of the good modality not only for symptomatic relieve but also good functional recovery.
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가스 분무 공정에 의해 제조된 Al-Si 합금 분말 압출재의 열처리에 의한 미세조직 및 기계적 특성 변화
남기영,진형호,김용진,윤석영,박용호,Nam, Ki-Young,Jin, Hyeong-Ho,Kim, Yong-Jin,Yoon, Seog-Young,Park, Yong-Ho 한국분말야금학회 2006 한국분말재료학회지 (KPMI) Vol.13 No.6
The microstructural and mechanical properties of Al-Si alloyed powder, prepared by gas atomization fallowed by hot extrusion, were studied by optical and scanning electron microscopies, hardness and wear testing. The gas atomized Al-Si alloy powder exhibited uniformly dispersed Si particles with particle size ranging from 5 to $8{\mu}m$. The hot extruded Al-Si alloy shows the average Si particle size of less than $1{\mu}m$. After heat-treatment, the average particle size was increased from 2 to $5{\mu}m$. Also, mechanical properties of extruded Al-Si alloy powder were analyzed before and after heat-treatment. As expected from the microstructural analysis, the heat-treated samples resulted in a decrease in the hardness and wear resistance due to Si particle growth. The friction coefficient of heat-treated Al-Si alloyed powder showed higher value tough all sliding speed. This behavior would be due to abrasive wear mechanism. As sliding speed increases, friction coefficient and depth and width of wear track increase. No significant changes occurred in the wear track shape with increased sliding speed.
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남기영,Nam, Ki-Young 대한화학회 2009 대한화학회지 Vol.53 No.6
Ag-Doped bioactive ceramic composites were prepared by colloidal silver solution. The physical properties of colloidal silver solution and Ag-Doped bioactive ceramic composites were characterized by Scanning electron microscopy(SEM), X-Ray Diffractometer(XRD) and Raman spectrophotometer respectively. According to XRD, we have identified that the chloride ion was chemically attached silver nano particles. SEM studies showed that silver chloride phases were homogeneously distributed on the Ag-Doped bioactive ceramic composites surface. Finally, we concluded that the silver chloride phase on the Ag-Doped bioactive ceramic composites surface was strongly prevent formation of Ag-hydroxyapatite.
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상아질접착제와 열순환에 따른 유동성 레진의 전단결합강도 비교 연구
남기영,Nam Ki-Young 대한치과보철학회 2006 대한치과보철학회지 Vol.44 No.4
Statement of problem : Limited research on flowable resin has been undertaken on its application directly on dentin associated with the adhesive systems. Purpose : This study was to evaluate the shear bond strengh and fracture aspect of flowable resin on human dentin with various types of dentin bonding adhesives with thermo cycling effect. Materials and methods: Filtek-Flow(3M ESPE, USA) was used as flowable resin and Eighty human molars were randomly divided into 4 groups : three dentin bonding adhesives (Scotchbond-Multipurpose : 3-step contentional system, One-Step : One-bottle system. Prompt L-Pop : All-in-one, self-etching primer) and 32% etching treatment without bonding adhesive as a control group. For evaluating their durability of bonding, each group was subdivided : storaging in the water at 37$^{\circ}C$(24 hours) and thermocycling (0$^{\circ}C$-55$^{\circ}C$, 30 seconds intervals, 1000 cycle). Shear bond strength tests were performed and resin-dentin interface and fracture mode were observed. Results were analysed by one-way ANOVA and Scheffe's multiple range test. Results and Conclusion : 1. At 0 cycle, the mean shear bond strength of One-Step exhibited the highest value of all groups(p<0.05), and there were no significant differences between Prompt L-Pop and Scotchbond-Multipurpose, Scotchbond-Multipurpose and control(p>0.05). After 1000 thermocycling, One-Step exhibited higher value than other groups(p<0.05), and there were no significant differences among other groups (p>0.05). 2. The shear bond strength of each group was significantly decreased after thermocycling except Scotchbond-Multipurpose (p>0.05). 3. The most common failure mode was adhesive type and mixed type, next in order.
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