http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 박청길 ( Park Cheong Gil ) (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
-
수종의 CAD/CAM 시스템으로 제작한 지르코니아 코어에서 Replica Technique을 이용한 변연 및 내면 적합도 평가
허중보,박청길,김하영,박찬경,신상완,Huh, Jung-Bo,Park, Cheong-Gil,Kim, Ha-Young,Park, Chan-Kyung,Shin, Sang-Wan 대한치과보철학회 2010 대한치과보철학회지 Vol.48 No.2
연구목적: 최근CAD/CAM으로 제작한 지르코니아 코어의 변연적합도에 관한 연구가 많이 진행되었지만, 여러 종의CAD/CAM 시스템의 변연 뿐만 아니라 내면적합도까지 상호 비교한 연구는 아직 미흡한 실정이다. 따라서 본 연구에서는 3종의CAD/CAM 시스템으로 제작한 전치부 단일 치아 지르코니아 코어의 변연 및 내면적합도를 Replica technique을 이용해 평가하고자 하였다. 연구 재료 및 방법:3종의CAD/CAM 시스템 (Cerasys $system^{(R)}$, KaVo $Everest^{(R)}$, $LAVA^{TM}$)을 이용하여, 시스템 별로 5개씩의 단일치아 지르코니아 코어를 제작하였다. 제작된 지르코니아 코어를 레플리카 테크닉 (Replica Technique)을 이용해 복제하고 복제된 시편을 협설, 근원심으로 정중앙을 절단하여 변연 및 내면의 간격을 측정하였다. Measuring microscope ($AXIO^{(R)}$)를 이용하여 50배 확대하여 촬영하고 $I-Solution^{(R)}$을 이용하여 측정하였고, ANOVA를 이용하여 통계적으로 분석하였다. 결과:지르코니아코어의 평균 변연간격은 $Cerasys^{(R)}$가 $84.74{\pm}27.57{\mu}m$, KaVo $Everest^{(R)}$가 $80.23{\pm}21.07{\mu}m$, $Lava^{TM}$가 $96.37{\pm}11.45{\mu}m$이었고 평균내면간격은각각 $Cerasys^{(R)}$는 $94.99{\pm}18.74{\mu}m$, KaVo $Everest^{(R)}$는 $92.31{\pm}25.18{\mu}m$, $LAVA^{TM}$는 $94.99{\pm}18.74{\mu}m$이었으며, 세 시스템간의 변연 및 내면간격의 평균적인 적합도에서 통계적 유의차는 없었다. 변연 및 내면간격의 비교에서는 KaVo $Everest^{(R)}$가 $LAVA^{TM}$보다 전반적으로 내면간격이 작은 것으로 보였다 (P< .05). 내면간격 중 절단부위의 간격은 세 시스템에서 공통적으로 다른 부위보다 크게 나타났다. 결론:본 연구에서 $Cerasys^{(R)}$, KaVo $Everest^{(R)}$, $LAVA^{TM}$시스템의 변연적합도는 차이가 없었고, 내면적합도는 KaVo $Everest^{(R)}$가 $LAVA^{TM}$ 보다 적었으나 세 시스템에서 공통적으로 절단부위 간격이 크게 나타났다. 세 시스템 모두 변연적합도 및 내면적합도가 임상적으로 허용범위 내에 있었다. Purpose: This study was aimed to compare the margin and internal fitness of single anterior all-ceramic crown zirconia core made by three deferent CAD/CAM systems. Material and methods: Five single zirconia cores were manufactured by three deferent CAD/CAM systems($Cerasys^{(R)}$system, KaVo $Everest^{(R)}$system, $LAVA^{TM}$system). The manufactured zirconia cores were duplicated through the use of replica technique, and a replicated sample was sectioned in the center of bucolingual and mesiodistal direction to measure the marginal and internal gap. Measurement was carried out by using measuring microscope ($AXIO^{(R)}$) and $I-Solution^{(R)}$ and analysed through the use of ANOVA. Results: As for the mean marginal fitness of the zirconia core, it was $84.74{\pm}27.57{\mu}m$, in $Cerasys^{(R)}$, $80.23{\pm}21.07{\mu}m$ in KaVo $Everest^{(R)}$ and $96.37 {\pm}11.45{\mu}m$ in $LAVA^{TM}$, and as for the mean internal gap, it was $94.11{\pm}30.07{\mu}m$ in $Cerasys^{(R)}$, $92.31{\pm}25.18{\mu}m$ in KaVo $Everest^{(R)}$, and $94.99{\pm}18.74 {\mu}m$ in $LAVA^{TM}$. There was no significant statistically deference among the total average gap of three systems. The internal gap in KaVo $Everest^{(R)}$ seemed to be smaller than $LAVA^{TM}$ (P < .05). The internal gap in the incisal area was larger in all of the three systems. Conclusion: There was no difference in marginal fitness in $Cerasys^{(R)}$, KaVo $Everest^{(R)}$ and $LAVA^{TM}$. As for the internal fitness, it was smaller in KaVo $Everest^{(R)}$ system than $LAVA^{TM}$ system. In all of the three systems, there was a larger gap in incisal area. The marginal and internal gap was within the clinically allowed range in all of the three systems.
-
낙동강 퇴적물의 Nonylphenol과 Bisphenol A 오염도 평가
김성철 ( Kim Seong Cheol ),박청길 ( Park Cheong Gil ),조현서 ( Jo Hyeon Seo ),이대인 ( Lee Dae In ) 한국물환경학회 2003 한국물환경학회지 Vol.19 No.4
Nonylphenol(NP) and Bisphenol A(BPA) are endocrine disruptors causing estrogenic effect and genital trouble etc This study was carried out to survey the characteristics of NP and BPA distribution in the surface sediments of Nakdong river. Concentration of NP and BPA ranged ND-25,144 and ND-57ng/g-dry wt in October, ND-56,696 and ND-84ng/g-dry wt in January, and ND-49.569 and 1 -48ng/g-dry wt in March respectively Results of grain size analysis, gravel was dominated at the upper reaches, sand at the middle reaches and mud in the river estuary dyke Maximum values of NP and BPA were found at river estuary dyke that sediment was composed of mud nearly and organic matters and metals was severely contaminated High levels of nomalized NP and BPA by mud showed at industrial complex nearby the Kumho river that was greatly affected sewage and wastewater NP and BPA concentration of this study area were relatively high in comparison with the other sites, it is necessary to control of noxious materials input to the water environment for water quality management
-
이대인 ( Lee Dae In ),박청길 ( Park Cheong Gil ) 한국물환경학회 2003 한국물환경학회지 Vol.19 No.5
The objective of this paper is to estimate the reduction rate of pollutant loads from pollution sources using the three dimensional eco-hydrodynamic model for effective water quality management of Masan Bay that was designated as a special management area. COD distribution of the bay was mostly over 3㎎/L. this value exceeded the seawater quality criteria Ⅲ. Total loads of COD, DIN and DIP from point sources were 15.532.5, 11,107.6 and 440.9㎏/day. respectively. A pattern of simulated residual current was dominated by southward flow at surface level. The calculated results by ecological modeling were in fairly good agreement with the observed values. It was evaluated that reduction of total polutant loads from point sources by over 60% is required in order to keep the level below 3 ㎎/L in COD which is the aiming seawater quality criteria of Masan Bay.
-
알칼리성 과황산칼륨 산화법을 이용한 해수와 담수에서의 총질소 총인 동시 분석방법에 대한 연구
정진아 ( Jeong Jin A ),박청길 ( Park Cheong Gil ),김동명 ( Kim Dong Myeong ) 한국물환경학회 2003 한국물환경학회지 Vol.19 No.3
It is necessary to develop a standard method for determination of total nitrogen (T-N) and total phosphorous (T-P) in seawater because the T-N and the T-P have been adopted in marine water quality standards since 2001. Precision and recovery of the simultaneous determination of T-N and T-P by alkaline persulfate oxidation in seawater and freshwater were assessed. Relative standard deviation and recovery of eleven seawater and freshwater standards of known nitrogen concentration were ±1.59∼±6.45% and 93.0∼100.6%, respectively. Relative standard deviation and recovery of eleven seawater and freshwater standards of known phosphorus concentration were ±0.62∼±4.95% and 96.0-1 00.8%, respectively. Relative standard deviation of five samples of seawater collected from Nakdong estuary and five samples of freshwater collected from Nakdong river were ±3.14∼±5.52% for nitrogen and ±3.98∼±6.67% for phosphorus. We can find that this method has a good precision and recovery below the acceptance limits for total nitrogen and total phosphorus in analyzing seawater and freshwater samples.
RISS
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
