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시멘트를 사용한 TITANIUM 인공 대퇴삽입물의 5-8년 추시결과
박윤수,Hugh U. Cameron (Youn Soo Park) 대한고관절학회 1995 Hip and Pelvis Vol.7 No.2
The objective was to determine if titanium(Ti) alloy was a suitable material for a cemented titanium femoral stem. Secondary objectives were to examine the effects of stem position and offset. Two hundred and thirty-eight cases of the hip were treated with a heavy cemented Ti alloy stem. These cases have been followed for 5-8years. They were rated clinically with a Harris hip score and radiologically after the fashion of Gruen. Twenty-eight patients died at less than 5 years and 12 were lost to follow-up. Sixty-one cases were hip revisions and were thus considered separately as were 27 primary cases with a smooth threaded acetabular component. Of the 129 primary cases with a cemented acetabular component, only 1 case required revision and this was for acetabular loosening only. The Harris hip rating for the others was 75.8% excellent, 18.7% good, 2,3% fair and 3.2% poor. Radiologic rating was high grade (4 zones) in 1 bilateral case and low grade in 7.7%, mainly single zone. Varus or valgus insertion did not influence outcome, nor did plug placement or stem offset. It is concluded that with appropriate stem design li alloy is a suitable material for cemented total hip replacement.
박윤수,이상덕,최정훈,Park, Youn-Soo,Lee, Sang-Deok,Choi, Jeong-Hun 한국인터넷방송통신학회 2021 한국인터넷방송통신학회 논문지 Vol.21 No.5
At the manufacturing site, workers have been operating by inputting materials into the manufacturing process and leaving input records according to the work instructions, but product LOT tracking has been not possible due to many omissions. Recently, it is being carried out as a system to automatically input materials using RFID-Tag. In particular, the initial automatic recognition rate was good at 97 percent by automatically generating input information through RACK (TAG) ID and RACK input time analysis, but the automatic recognition rate continues to decrease due to multi-material RACK, TAG loss, and new product input issues. It is expected that it will contribute to increasing speed and yield (normal product ratio) in the overall production process by improving automatic recognition rate and real-time monitoring through the establishment of artificial intelligent smart factory datasets. 제조현장에서 작업자는 작업 지시서에 따라 제조 공정에 소재를 투입하고 투입 기록을 남기는 방식으로 운영해왔으나, 누락하는 경우가 많아 제품 LOT 추적이 안되는 경우가 발생하고 있었으며, 최근 스마트공장 구축으로 RFID-Tag를 활용하여 소재 투입 정보를 자동입력 하는 시스템으로 진행되고 있다. 특히, 생산라인에 투입되는 RACK에 부착된 TAG 정보를 수신하여 RACK(TAG) ID와 RACK 투입시간 데이터 분석을 통한 투입정보를 자동으로 생성토록 하여 초기 자동인식률이 97%로 양호하였으나 멀티소재 사용 RACK, TAG분실, 신규 제품 투입 이슈 등이 발생하면서 자동인식률이 계속 낮아지는 상황이다. 인공지능형 스마트공장 데이터셋 구축 방법은 자동인식률 향상과 실시간 모니터링이 가능해지므로 생산 공정의 전반에 있어 속도와 수율(정상제품 비율)을 높이는데 기여할 것으로 기대한다.
유도장치가 부가된 진동회전방식 전동칫솔의 구강건강증진효과에 대한 조사연구
박윤수,이철우,함병도,구기태,김태일,설양조,이용무,류인철,구영,정종평,Park, Yun-Soo,Lee, Chul-Woo,Hahm, Byoung-Do,Koo, Ki-Tae,Kim, Tae-Il,Seol, Yang-Jo,Lee, Yong-Moo,Rhyu, In-Chul,Gu, Young,Chung, Chong-Pyoung 대한치주과학회 2009 Journal of Periodontal & Implant Science Vol.39 No.4
Purpose: This study was performed to evaluate the effect of powered toothbrush with a wireless remote display on the subjective and objective oral hygiene improvement. Methods: One hundred and fifteen subjects in healthy or mild gingivitis status between the ages of 20 and 90 were recruited and reviewed for study inclusion criteria. At first visit, 115 pre-screened subjects filled in the questionnaire form which consisted of demographic factors, behavioral factors (smoking, alcohol consumption), toothbrushing habits (brushing time and frequency), self-reported oral health status, and self-satisfaction. Baseline clinical indices (Plaque index, Gingival index) were also recorded by a periodontist. Subjects were instructed how to use powered toothbrush with a wireless remote display, and were provided with it. Thirty days after first visit, 90 subjects returned for the second assessment by self-reported questionnaire form and professional clinical checkup. Statistical analysis was performed using paired t-test for the difference between baseline and second visit data. The relationship among variables was examined with chi-square test and Fisher' s exact test. Results: Significant differences were not found on self-reported satisfaction related with sex, smoking, alcohol consumption (P<0.05). Self-reported tooth brushing habit was improved in the aspect of brushing time and frequency. Significant differences were found on the self-reported oral health status, self-satisfaction, and clinical indices between the baseline and second visit data (P<0.01). Clinical indices were significantly reduced after using powered toothbrush with a wireless remote display (P<0.01). No adverse reactions were reported during the study period. Conclusions: Powered toothbrush with a wireless remote display successfully promoted oral hygiene from the subjective and objective viewpoint after 30 days of home usage.
무증상 천식 환자에서 impulse oscillometry 의 유용성
박정엽(Jeomg Youp Park),김철우(Cheol Woo Kim),이재훈(Jae Hoon Lee),박윤수(Yoon Soo Park),박병규(Byug Gyu Park),박중원(Jung Won Park),홍천수(Chein Soo Hong) 대한천식알레르기학회 2001 천식 및 알레르기 Vol.21 No.3
Background: Impulse oscillometry (IOS) is a valuable method for evaluating respiratory func- tion in a patient with bronchial asthma. There have been no reports on compliance assessment of the remodeled airway by estimation of the relationship between resistance and breathing volume in asymptomatic asthma using IOS. Objective: This study was performed to evaluate whether IOS could distinguish asymptomatic asthma from healthy control and detect altered physiology of the airway due to airway remodeling in asymptomatic asthmatic patients with normal pulmonary function. Method: 16 healthy and 16 asymptomatic patients with bronchial asthma were asked to breathe with the usual tidal volume (Vt) and with twice the amount of Vt. Using IOS, impedance, resistance for frequency at 5Hz and 20 Hz, reactance, and resonant frequency were measured. Results: Resonant frequency was significantly higher in asymptomatic asthma than in healthy control for breathing with both usual Vt and twice the amount of Vt (mean±S.E.M. 16.35±1.44 Hz vs 13.34±0.66 Hz, 16.27±0.72 Hz vs 13.68±0.66 Hz, p<0.05 respectively), but the discriminant power of resonant frequency for distinguishing asymptomatic asthma from healthy control was low. There were no significant differences of other IOS parameters between asthma and control groups. Compared with control group, asymptomatic asthma group showed no significant change of IOS parameters according to breathing volume change. Conclusion: In this study, we could not find any IOS parameters sensitive enough to detect altered physiology of the remodeled airway in patients with asymptomatic bronchial asthma. Further studies are recommended to improve sensitivity of IOS method for investigating airway physiology in bronchial asthma. (J Asthma Allergy Clin Immunol 21: 491-499, 2001)