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개선된 드릴 디자인을 적용한 간소화된 드릴링 과정에 관한 연구
윤지훈(Ji-Hoon Yoon),전계록(Gye Rok Jeon),윤미정(Mi-Jung Yun),허중보(Jung-Bo Huh),정창모(Chang Mo Jeong) 대한치과의사협회 2015 대한치과의사협회지 Vol.53 No.5
Purpose : The objective of this research was to develop a more simplified drilling procedure with an enhanced implant drill. Materials and Methods : The drill enhanced design factors enabled implantation of Dia. 5.0mm fixture with only 2 times drilling which is more simplified drilling procedure. The enhanced drill was designed with 2 flutes, 2-phase or 3-phase formed drill tip and 25 degrees of helix angle. The proposed drilling procedure (2 times) was compared with a general drilling process (4 times) in terms of temperature changes, cutting time and ISQ value. Results : The simplified drilling procedure indicated less heat than a conventional drilling procedure (p<0.05). The enhanced drill showed significantly shorter drilling time than a conventional drill (p<0.05). On the other hand, higher insertion torque and ISQ value were observed on the the suggested drilling procedure than the conventional drilling procedure (p<0.05). Conclusion : A simplified drilling procedure with the newly designed drill could provide higher effectiveness and safety of dental implant operations under properly controlled external conditions, such as irrigation and RPM of drilling.
증례 : 소화기 ; Helicobacter pylori 제균 요법과 proton pump inhibitor 치료 후 호전된 Menetrier`s씨 병 1예
윤지훈 ( Ji Hoon Yoon ),박승제 ( Seung Jei Park ),최재원 ( Jae Won Choi ),최성원 ( Sung Won Choi ),박승근 ( Seung Keun Park ),박희욱 ( Hee Ug Park ),김혜숙 ( Hye Sook Kim ) 대한내과학회 2010 대한내과학회지 Vol.78 No.6
저자들은 상복부 불쾌감과 체중감소를 주소로 내원한 환자에서 상부 위장관 내시경 검사, 병리학적 소견, 복부 전산화 단층 촬영을 근거로 진단된 Menetrier씨병 1예를 경험하였기에 문헌고찰과 함께 보고하는 바이다. Menetrier`s disease is a protein-losing hypertrophic gastropathy characterized by diffuse tremendous thickening of the gastric wall caused by excessive proliferation of the mucosa. Although the cause of Menetrier`s disease is unknown, an association with Helicobacter pylori has been reported. A 42-year-old man was hospitalized for the evaluation of progressive body weight loss and indigestion for 6 months, with recently aggravated epigastric discomfort. Gastroscopy revealed prominent mucosal folds in the body and fundus. The histological findings revealed gastritis with erosions and foveolar hyperplasia. After eradicating the Helicobacter pylori and treatment with a proton pump inhibitor, clinical and endoscopic resolution ensued. (Korean J Med 78:737-740, 2010)
치과용 임플란트의 안전성과 유효성에 대한 드릴 디자인의 효과
윤지훈(Ji-Hoon Yoon),전계록(Gye-Rok Jeon),윤미정(Mi-Jung Yun),허중보(Jung-Bo Huh),정창모(Chang-Mo Jeong) 대한치과의사협회 2015 대한치과의사협회지 Vol.53 No.2
Purpose : The objective of this research was to investigate an optimization of drill design factors for implant stability and efficacy through comparative evaluation by the cutting time, heat generation and initial stability. Materials and Methods : Three design factors were considered for the purpose of drill design optimization; the number of flute(2 flute, 3 flute), helix angle(15°, 25°) and drill tip shape(straight, 2 phase). Design factors were selected through comparative evaluation by temperature change, cutting time and ISQ value. Results : Heat generation and cutting time are influenced by all design factors(p<0.05). Drill tip shape was the only factors which influenced to the largest initial stability(p<0.05). Conclusion : Drills with 2 flutes, 2 phase formed drill tip, and 25 degrees of helix angle exhibit a better performance than other design.
윤지훈(Yoon, Ji-Hoon),강석진(Kang, Seok-Jin) 대한건축학회 2022 대한건축학회 학술발표대회 논문집 Vol.42 No.2
The purpose of this study is to examine problems and improvement measures that may occur along with the increase of pets in apartment housings in the architectural aspect. As a result of this study, related research is being conducted little by little, and it has been confirmed that large-scale apartment housings provide spaces and facilities for pets as specialized products. However, there have been no specific results so far, and there have been limitations mainly in discussions to apply architectural elements for pets applied in some small houses or outside spaces. After that, it is necessary to study 42 stresses due to pets and the architectural elements applicable to 37 spaces and facilities in apartment housings that can control them.
목차 : 치과용 임플란트에 대한 ISO 14971 기반의 리스크관리
윤지훈 ( Ji Hoon Yoon ),김영진 ( Young Jin Kim ),전계론 ( Gye Rok Jeon ),정창모 ( Chang Mo Jeong ) 한국안전학회(구-한국산업안전학회) 2012 한국안전학회지 Vol.27 No.2
Risk management is the process that helps to identify hazards, analyze them, and then to create an action plan to avoid and mitigate these hazards. The main objective of risk management in product development and manufacturing is to provide safe and efficient products without spending too many resources. Medical device manufacturers also face enormous risks-regulatory, legal, and financial-based on their products and processes, and the concepts of risk management are particularly important because any single failure may result in serious damages to body or loss of life, In this regard, a set of guidelines for the application of risk management to medical devices has been issued by ISO and specified in the document ISO 14971 Medical devices-Application of risk management to medical devices. The main objective of this study is to investigate the application of risk management to dental implant development and manufacturing processes based on ISO 14971. A general risk management process is first introduced, and the application of ISO 14971 to dental implants is further investigated.