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하악 완전 무치악 환자에서 solitary attachment를 연결한 임시 보철물로 조기 부하를 가한 후, 조립식 바를 이용한 최종 임플란트 지지 피개의치 제작증례
박도현(Do-Hyeon Park),이소현(So-Hyoun Lee),전영찬(Young-Chan Jeon),정창모(Chang-Mo Jeong),윤미정(Mi-Jung Yun),허중보(Jung-Bo Huh) 대한치과의사협회 2016 대한치과의사협회지 Vol.54 No.1
SFI-bar is prefabricated bar system and can be assembled at chairside without soldering or welding, thus reducing bone loss, costs and time. A 53-year-old male patient, who had severely absorbed mandible, hoped to wear a stable mandiblular denture. Four implants were placed in the extraction site of canine and 1st molar. Early loaded temporary denture with solitary type attachment was delivered 3 weeks after surgery. 3 month later, SFI-bar was connected and adjusted at chairside. Then, implant overdenture using SFI-bar was delivered. This case report showed that a satisfactory clinical result was achieved by 4-implantsupported overdenture using the SFI-Bar system in a mandibular edentulous patient.
유동상 생물막 공정을 이용한 염색폐수 처리시 담체 충진량 및 공기 주입량의 영향
박도현 ( Do-hyeon Park ),정병길 ( Byung-gil Jung ),윤태경 ( Tae-kyung Yoon ) 한국환경기술학회 2015 한국환경기술학회지 Vol.16 No.6
유동상 생물막 공정을 염색폐수 처리에 적용하기 위하여 실험실 규모의 실험을 실시하였다. 본 실험에서는 20 L/day 규모의 원통형 반응장치를 사용하여 반응기 내 폴리에틸렌에 무기물 등을 첨가한 담체를 사용하였다. 담체 충진량이 70%일 경우 유동상태가 불량하고, 30% 일 때는 처리효율이 낮았으며, 50% 정도일 때 유동이 원활하며 처리효율도 비교적 높게 나타났다. 공기 주입량에 따른 생물막의 탈리 정도를 측정한 결과 공기 공급이 증가할수록 부착된 생물막의 탈리량도 증가함을 알 수 있었으며, 적정 공기량은 1.0 L/min으로 판단되었다. 유동상 생물막법과 기존 활성슬러지법을 사용하여 COD<sub>Mn</sub>, 색도, SS, BOD<sub>5</sub> 처리를 비교한 결과 유동상 생물막법이 활성슬러지법 보다 처리효율이 더 우수한 것으로 나타났으며, 특히 색도는 36.8% 이상 효율이 개선되었다. 이러한 예비실험의 결과 염색폐수 처리에 유동상 생물막법이 활성슬러지법을 대체할 수 있을 것으로 생각되며, 향후 실험 규모를 확대하여 대규모 공정에 적용할 필요가 있다. The feasibility of moving-bed biofilm process to treat dyeing wastewater was studied using a 20 liter/day lab-scale moving-bed biofilm reactor(MBBR). A polyethylene-based modular tube(PEMT) was used as a carrier material inside the reactor. The moving bed has been maintained stable with high efficiency at carrier volume of 50%. Carrier volume of 30% showed stable but low efficiency, and 70% showed unstable performance. The effect of air supply on the biofilm detachment was tested with air volumetric flow rates of 1.0, 2.0 and 3.0 L/min. As air flow rate increased, the volume of detached bacterial biofilm was increased. Around 1.0 L/min looked better than others. The moving-bed biofilm reactor showed a better performance with high efficiencies of COD<sub>Mn</sub>, Color, SS and BOD<sub>5</sub> than the activated sludge process. A moving-bed biofilm reactor would be a alternative process to fulfill requirements improving its efficiency in the treatment of dyeing wastewater. The results of this study could be scaled up and used as a design tool for the moving-bed biofilm systems of the dyeing wastewater treatment processes.
간내담석 환자에서 자기공명 담도췌관조영술의 유용성 및 제한점
박도현 ( Park Do Hyeon ),김명환 ( Kim Myeong Hwan ),이상수 ( Lee Sang Su ),김선영 ( Kim Seon Yeong ),김정호 ( Kim Jeong Ho ),김현준 ( Kim Hyeon Jun ),배종석 ( Bae Jong Seog ),서동완 ( Seo Dong Wan ),이성구 ( Lee Seong Gu ),김아영 대한소화기학회 2003 대한소화기학회지 Vol.42 No.5
Diagnosis of bile duct strictures as well as detection and localization of hepatolithiasis is important for an effective treatment of hepatolithiasis. For this purpose, endoscopic retrograde cholangiopancreatography (ERCP) and percutaneous transhepatic cholangiography (PTC) have been preferred as the diagnostic modalities of choice for hepatolithiasis. At present, magnetic resonance cholangiopancreatography (MRCP) is rapidly replacing ERCP. To determine the usefulness and limitation of MRCP for detecting hepatolithiasis and biliary strictures, we compared the result of MRCP with that of percutaneous transhepatic cholangioscopy (PTCS) as the standard reference. Methods: Sixty-six patients with primary hepatolithiasis who underwent both MRCP and PTCS were enrolled. All patients underwent PTCS within 2 weeks of MRCP. The results of MRCP were reviewed by radiologists who were unaware of the clinical information about the location of hepatolithiasis and the presence of biliary strictures. Results: The sensitivity and specificity of MRCP for detecting intrahepatic stones were 72.4 and 90%, respectively. The sensitivity of MRCP for depicting intraheptic bile duct strictures was 64%. The overall agreement between MRCP and PTCS for intrahepatic stones showed a good reliability (kappa value=0.64, p<0.05). The agreement of MRCP for hepatolithiasis with intrahepatic bile duct strictures with reference to PTCS showed a moderate reliability (kappa value=0.47, p<0.05). Imaging findings such as pneumobilia and hepatic parenchymal atrophy were related to false positive results in location of hepatolithiasis (p<0.05). Conclusions: MRCP has a good agreement rate in evaluation of intrahepatic stones and a moderate agreement rate in intrahepatic strictures, compared to PTCS. (Korean J Gastroenterol 2003;42:423-430)