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박종경 ( Park Jong-kyoung ),서지현 ( Seo Jee-hyon ),임홍철 ( Rhim Hong-chul ),임병호 ( Yim Byung-ho ),이민섭 ( Lee Min-sup ) 한국구조물진단유지관리공학회 2007 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.11 No.2
Core samples from the destroyed structures in existence gongsiche test to measure the strength of an accurate, the reality is that it is the bulk of the core samples, gongsiche safety and repair costs due to difficult to apply. Thus, in this study due to the reconstruction of the demolished structures in which the bulk of the core samples, gongsiche, compression strength, and to measure its value is based on statistical techniques used to identify the number and location of samples for analysis and can also be affected by factors.
치과용 CAD/CAM 전용 세라믹기반 하이브리드 레진 수복물의 변연 적합 연구
정창섭,박종경,Jeong, Chang-Seop,Park, Jong-Kyoung 대한치과기공학회 2020 대한치과기공학회지 Vol.42 No.3
Purpose: This study aimed to assess and compare the marginal fit of ceramic-based hybrid resin restoration (HYB) and zirconia restoration (ZIR) for dental computer-aided design/computer-aided manufacturing systems. Methods: A stainless steel master model was produced. The impression was first made with silicone, and then stone working models were produced. A total of twenty restorations were fabricated with two different materials: ZIR and HYB. The silicone film thickness of the marginal gap was measured using a digital microscope; digital photos were taken at a magnification of ×160, and then analyzed using a measurement software. The values of the result were evaluated with the independent-sample t-test (α=0.05). All statistical analyses were performed with a statistical software. Results: The mean values for the marginal gap was 37.14±2.96 ㎛ for HYB, compared with 40.37±5.26 ㎛ for ZIR. No significant difference was found between ZIR and HYB (p=0.107). Conclusion: As a result, the marginal fit of the restoration fabricated using the hybrid resin was better than that of the restoration fabricated using zirconia. Also, the marginal fit of all groups was below the clinical acceptable range of 120 ㎛. Thus, HYB for dental CAD/CAM system in this study is expected to be suitable for clinical use in dentistry.
곽희용(Hee Yong Kwak),김성근(Sung Geun Kim),박종경(Jong Kyoung Park),이성(Seong Lee) 한국간담췌외과학회 2010 한국간담췌외과학회지 Vol.14 No.2
Purpose: Laparoscopic cholecystectomy has been used widely for effective management of acute cholecystitis. However, it has limitations. In this study, we compared laparoscopic approaches and an open method. The meaning of the open method was assessed again. Methods: A retrospective review of 60 patients undergoing cholecystectomy for acute cholecystitis was done. Thirty patients were part of a laparoscopic cholecystectomy group; the other 30 patients were part of an open cholecystectomy group. Laparoscopic cholecystectomy was done using a 4-trochar method. We reviewed geographic characteristics, body mass index, white blood cell count, and clinical outcomes. Results: Age, gallbladder wall thickness and white blood cell counts were significantly different between the 2 groups; operation time was not. The length of the postoperative hospital stay in the laparoscopic group was significantly shorter than that in the open group. There was one case of bile leakage in the laparoscopic group which was treated by endoscopic nasal bile drainage. Conclusion: Open cholecystectomy is still a valid choice for acute cholecystitis in the modern era of laparoscopic surgery. In severe cases, conversion is not a failure and should be done immediately if necessary.
강혜선 ( Hye Sun Kang ),강지영 ( Ji Young Kang ),강현희 ( Hyun Hui Kang ),김현진 ( Hyun Jin Kim ),임근준 ( Keun Joon Lim ),김승경 ( Seung Kyoung Kim ),이상학 ( Sang Haak Lee ),문화식 ( Hwa Sik Moon ),박종경 ( Jong Kyung Park ) 대한결핵 및 호흡기학회 2010 Tuberculosis and Respiratory Diseases Vol.69 No.3
Intussusception primarily occurs in children and is uncommon in adults. Moreover, intussusception caused by intestinal tuberculosis is very rare. We report a case of intussusception induced by intestinal tuberculosis. A 53-year-old man presented to our hospital with complaints of cough and sputum for 2 weeks. We started anti-tuberculosis medication as the patient`s sputum acid-fast staining was positive. After 4 days of treatment, the patient developed abdominal cramping pain. Imaging studies showed ileo-ileal type intussusception. The patient underwent segmental resection of the small bowel and intestinal tuberculosis was confirmed on histological examination. He recovered after surgery and was discharged on anti-tuberculosis medication.