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RISS 인기검색어
- 검색키워드
- 저자 : 손외수 ( Oe Soo Son ) (검색결과 5 건)
- 무료
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손외수,진태호,Son, Oe-Soo,Jin, Tai-Ho 대한치과보철학회 1999 대한치과보철학회지 Vol.37 No.4
Simulation of naturally appearing enamel in fixed prosthodontics could be achieved with all ceramics. The purpose of this study was to investigate the stain resistance of 4 different all ceramics materials (In-ceram, IPS Empress, Celay, Vintage). Forty specimens were prepared using manifacture's instruction and the samples were divided into two groups. The specimens for one group were glazing and those for other group were ground to remove the glazing layer. All specimens were immersed in methylene-blue for 24hours. The color values for each specimen was measured with colorimeter (Mode Tc-6Fx, Tokyo Denshoku Co.) prior to and after immersion in methylene-blue. The following conclusions were drawn from this study. 1 The stain resistance of glazing ceramics was higher than that of unglazing ceramics. 2. The changes of ${\Delta}E^*$\;and\;L^*$ values were revealed in Vintage and unglazing Celay. 3. The changes of $a^*$ values were revealed in unglazing vintage, Celay, In-ceram. 4. The changes of $b^*$ value were revealed in Vintage, IPS Empress and unglazing Celay.
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반복 사용된 IPS Empress 2의 표면경도와 pressing accuracy에 관한 연구
손외수,김유리,이경자,진태호,Son Oe-Soo,Kim Yu-Lee,Lee Kyung-Ja,Jin Tai-Ho 대한치과보철학회 2003 대한치과보철학회지 Vol.41 No.5
Statement of problem : IPS Empress2 system was developed and used in prosthodontic treatment, but the cost of ingot is expensive for wide application. Purpose : This study was to investigate the possibility on recycling of IPS Empress 2 ceramic for wide application of IPS Empress 2 ceramic in prosthodontic treatment. Material and Method : 1st, 2nd and 3rd pressed disc-shaped($10{\times}1.5mm$) IPS Empress 2 specimens were made with IPS Empress ingot(200, Ivoclar, Liechtenstein) and pressing furnace(IPS Empress EP 500, Ivoclar, Liechtenstein). Vicker's surface hardness and fracture toughness, acid resistance, and pressing accuracy of IPS Empress 2 ceramic were measured and analyzed. Surface hardness was measured by microhardness tester(MTX 70. Matsuzawa, Japan), before and after surface treatment with 0.5% hydrofluoric acid and carbonic acid(Coca cola) for evaluation of acid resistance. Results : The surface hardness of 1st pressed specimen was the higher(5.11 GPa) than those of 2nd pressed(4.89 GPa) and 3rd pressed specimen(4.86 GPa), and the fracture toughness of 1st pressed ($1.58MPam^{1/2}$) and 2nd pressed specimen($1.51MPam^{1/2}$) were higher than that of 3rd pressed specimen($1.39MPam^{1/2}$). The changes of surface hardness of 1st, 2nd, and 3rd pressed specimens after treatment with fluoric acid were 0.17, 0.06, 0.05 (GPa) respectively, and those of 1st, 2nd, and 3rd pressed specimens after treatment with carbonic acid were 0.07, 0.00, 0.05(MPa) respectively. The pressing accuracy of 1st,2nd and 3rd specimen were 77.22%, 85.681%, and 75.05%. The pressing accuracy of 2nd pressed specimen was higher than that of the 3rd specimen. Conclusion : The changes of physical properties according to recycling of IPS Empress 2 from this study were insignificant. Therefore the possibility of recycling of IPS Empress 2 can be suggested from the results.
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상아질 지각완화제가 레진시멘트의 전단결합강도에 미치는 영향
이호,진태호,손외수,안희영,Lee Ho,Jin Tai-Ho,Son Oe-Soo,Ahn Hee-Young 대한치과보철학회 2002 대한치과보철학회지 Vol.40 No.4
The purpose of this study was to investigate the effects of desensitizer on shear bond strength of adhesive resin cements for all ceramic crown. For this study, Gluma $desensitizer^{(R)}$(Heraeus Kulzer, Germany) and MS $Coat^{(R)}$(Sun medical, Japan) were used as desensitizer, and Bistite $II^{(R)}$ resin cement(Tokuyama, Japan) and Variolink $II^{(R)}$ resin cement (Ivoclar, Liechtenstein) were used. IPS Empress ceramics were bonded to dentin surfaces after application of desensitizer and shear bond strength of specimens were measured using UTM(Zwick 1456 41. Zwick, Germany) at a crosshead speed of 1mm/min. The obtained results were as follows : 1. The shear bond strength of both resin cements were not affected by Gluma $desensitizer^{(R)}$ containing HEMA 2. The shear bond strength of Bistite $II^{(R)}$ resin cement was significantly decreased by MS $Coat^{(R)}$. 3. The failure mode in MS $Coat^{(R)}-Bistite \;II^{(R)}$ group was mainly adhesive type between dentin and resin cement. but that of Gluma $desensitizer^{(R)}$-Variolink $II^{(R)}$ group was mainly mixed type, combined adhesive failures between dentin and resin cement or porcelain and resin cement.
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백윤정 ( Yoon Jeong Baek ),박성진 ( Sung Jin Park ),이효현 ( Hyo Hyun Lee ),손외수 ( Oe Soo Son ),이주영 ( Joo Young Lee ) 한국의류산업학회 2014 한국의류산업학회지 Vol.16 No.3
This study`s goal was to obtain basic data about the functional gowns of health care providers. 828 health care providers, including 150 doctors, 224 dentists, 202 nurses, 61 physical therapists and 191 medical technicians, living in Seoul and Daejeon areas, participated in this survey. A questionnaire was created using 15 items about the current health care providers` gowns. 15 items were consisted of 3 parts; satisfaction rate and activity (part 1), preference the details of medical gown (part 2), and personal information (part 3). In this study, wearer activity was the main concern for them and the majority of respondents, regardless of their age and type of work, preferred the V neckline, short gown length (waist line), loose sleeves and anti-bacterial textiles. Only the doctors preferred the full sleeves, whereas, the others preferred short sleeves. The younger health care providers showed a slightly higher preference for the slim type gown, while the older providers preferred the straight type. In this study, most health care providers were not satisfied with their current gowns, except dentists. Physical therapist answered the highest score of dissatisfied for current wearing medical gown among the all health care professionals. The 20`s answered the highest score of dissatisfaction among the all generation.
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손외수,진태호 원광대학교 치의학연구소 1998 圓光齒醫學 Vol.8 No.3
Simulation of naturally appearing enamel in fixed prosthodontics could be achieved with all ceramics. The purpose of this study was to investigate the stain resistance of 4 different all ceramics materials (In-cer-am, IPS Empress, Celay, Vintage). Forty specimens were prepared using manifacture's instruction and the samples were divided into two groups. The specimens for one group were glazing and those for other group were ground to remove the glazing layer. All specimens were immersed in methylene-blue for 24hours.The color values for each specimen was measured with colorimeter (Mode Tc-6Fx, Tokyo Denshoku Co.) prior to and after immersion in methylene-blue. The following conclusions were drawn from this study. 1. The stain resistance of glazing ceramics was higher than that of unglazing ceramics. 2. The changes of ΔE^* and L^* values were revealed in Vintage and unglazing Celay. 3. The changes of a^* values were revealed in unglazing vintage, Celay, In-ceram. 4. The changes of b^* value were revealed in Vintage, IPS Empress and unglazing Celay.
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