처리 방법이 다른 표면이 임플랜트의 골유착 및 안정성에 미치는 영향

양성욱,임헌송,조인호,Yang, Seoung-Wook,Lim, Heon-Song,Cho, In-Ho 대한치과보철학회 2006 대한치과보철학회지 Vol.44 No.5

Purpose: This experiment examined the effect of different surface treatment on the osseointegration and stability of implants. Material and methods: In this study, 40 each of machined, SLA and RBM implants, which are the most commonly used implants, were implanted into the tibia of 20 normal rabbits using $OsseoCare^{TM}$. The rabbits were sacrificed after 1 week, 4 weeks, 8 weeks and 12 weeks for implant stability analysis, removal torque analysis, histologic and histomorphometric analysis. Result : ISQ showed significant difference between Machined and RBM at first week and at 4 weeks. There was significant difference between Machined and both SLA and RBM(p<0.05) but after 8 weeks there were no significant difference between each group. In the removal torque, RBM showd significantly higher values than SLA and Machined surface at 1st week. At 4th and 12th week, there was significant difference between Machined and SLA, RBM(p<0.05). In the bone to implant contact variable, there was no significant difference between each surface treatment method. In the Machined surface group, there was no significant difference between each time interval. but in SLA group, there were significant differences between the 1st week and 12th week and in RBM group, there were significant differences between the 1st week and 8th, 12th week and between 4th and 12th week(p<0.05). The bone area showed significantly higher values in SLA and RBM compared to Machined surface 1st and 8th week and significantly higher values in SLA than Machined surface at the 4th week(p<0.05). Conclusion: The roughened surface of implants showed positive effect in the early stages of implantation and assisted in bone formation After the bone formation stage, there was no statistical difference between Machined and roughened surface groups. In dental implantation, where initial stability is critical to the success of implants, the use of roughened surface implants should assist in reducing the healing period after implantation.

Benchmark Problem을 이용한 수치해석의 오차분석 연구

양성욱,이상철,강자영 한국항공우주학회 2008 한국항공우주학회 학술발표회 논문집 Vol.- No.-

에리스리톨의 수율 향상을 위한 Candida magnoliae의 삼투압 내성 변이균주의 개발과 탄소원 및 질소원의 최적 농도 결정

양성욱,서진호,유연우 한국생물공학회 2000 KSBB Journal Vol.26 No.4

C. magnoliae JH를 이용하여 높은 수융의 erythritol을 생산 하기 위한 삼투압 내성의 변이균주 개발과 탄소원 및 질소원 의 최적 농도결정에 대한 연구를 수행하였다. 꿀 벌집에서부 터 분리한 야생균주인 C. magnoliae JH를 이용한 baffled R flask 배양에서 당농도 100 밍L인 경우 erythritol 수율은 2 20.3% 이고 생산성은 0.23 g/L-h이었다. 균주의 수율 향상을 위하여 야생균주의 포자에 EMS를 처리한 후 2차에 결친 선 별과정을 통해 높은 농도의 염에서 세포성장이 우수하변서 동시 에 erythritol의 수울과 생산성 이 가장 우수한 삼투압 내 성 변이균주 M26을 최종적으로 선발하였다. 선발한 변이균 주 M26을 이용한 baffled flask 배양에서 100 g/L의 glucose 인 경우에 erythritol의 수율과 생산성이 각각 25.0%와 0.30 g/L-h로서 야생균주에 비하여 증가한 반면에 glycerol의 생성은 오히려 감소하였다. 변이균주 M26을 이용한 탄소원 의 선별에 대한 실험에서는 glucose가 erythritol 생산에 가장 적합하였다. 유기질소원인 yeast extract는 5 g/L의 농도에서 erythritol 수율이 가장 우수하였다. 발효조를 이용한 glucose 농도 결정에 대한 실험에서 세포농도는 glucose의 농도 증가 에 따라 감소하였으나, eηthritol 농도는 당 농도의 증가에 따라 증가하여 250 밍L glucose의 농도에서 최대 127.5 g/L가 생산되었으며, 발효말기에는 glycerol이 존재하지 않았다. 또 한 수율과 생산성도 glucose의 농도 증가에 따라 250 g/L까 지 증가하여 최대 51.0%의 수율과 0.63 g/L-h의 생산성을 나타내었다. Experimental studies were carried out to develop an osmotolerant mutant of Candida magnoliae JH and to determine the optimum concentrations of carbon and nitrogen sources to improve erythritol yield and productivity. Mutants of C. magnoliae JH were prepared by treatment with ethylmethane sulfonate, and osmotolerant mutants were isolated from the agar plate colonies containing 2.5 M KCI. Among the mutants isolated, one mutant M26 was finally selected based on erythritol yield and productivity. In shake flask culture, glucose proved to be the best carbon source and the optimum yeast extract concentration was 5 g/L based on 100 g/L glucose. The erythritol yield and productivity of mutant M26 were greater than wild type in 100 g/L glucose medium. in the fermentation experiments, erythritol production increased with increased glucose concentration, up to a limit of 250 g/L. The maximum concentration of erythritol achieved 127.5 g/L, and the yield and productivity of erythritol production were 51.0% and 0.63 g/L-h, respectively.

내시경적 CRE 풍선확장술을 이용한 식도 이물 제거

양성욱,남승우,이성은,권혁춘 대한내과학회 2009 대한내과학회 추계학술대회 Vol.2009 No.-

사진 주사(走査)를 이용한 치과용 모형재의 정확도에 관한 연구

양성욱,임주환,조인호,Yang, Seong-Wook,Lim, Ju-Hwan,Cho, In-Ho 대한치과보철학회 1996 대한치과보철학회지 Vol.34 No.2

Dental cast and die materials are essential material using in almost dental prsthodontic procedure and it's most important requirement is accuracy for reqorducing the oral anatomical structures. In this study, 5 abutments A, B, C, D, E were fabricated on the metal master model to simulate the arch form and specimens were poured with 4 cast materials. Inter-abutment distances, A-B, A-C, A-D, A-E, B-C, B-D were calculated using the photo-scanning and the deviations from the metal master model were also evaluated. The results were as follows; 1. The distance between A-B, A-C, A-D, A-E, B-C, B-D of the abutments A, B, C, D, E of each cast material was calculated. And after comparing the deviations between the metal master model. $Fujirock^{(R)}$ showed the lowest value with $0.20{\pm}0.22mm$, and the deviation increased in the order of $Suprastone^{(R)}$, Epoxy $Die^{(R)}$, Die $Keen^{(R)}$. There was significant difference between $Fujirock^{(R)}$ and Epoxy $Die^{(R)}$, Die $Keen^{(R)}$. 2. In each calculation area, the difference in measurements between cast material and metal master model showed singificant difference between A-B and Cross arch measure-ments of A-D, B-D, A-E(p<0.05). 3. The difference in measurements between cast material and metal master model in the A-B area showed $Fujirock^{(R)}$ to be the lowest with $0.05{\pm}0.04$mm and increased in the order of Die $Keen^{(R)}$, $Suprastone^{(R)}$, Epoxy $Dies^{(R)}$. There was significant difference between $Fujirock^{(R)}$ and $Suprastone^{(R)}$, Epoxy $Die^{(R)}$ (p<0.05). 4. The difference in measurements between cast material and metal master model in the B-C area showed $Fujirock^{(R)}$ to bo the lowest with $0.17{\pm}0.11$mm and increased in the order of $Suprastone^{(R)}$, Die $Keen^{(R)}$, Epoxy $Dies^{(R)}$. There was significant difference between $Fujirock^{(R)}$ and Die $Keen^{(R)}$, Epoxy $Die^{(R)}$(p<0.05). 5. The difference in measurements between cast material and metal master model in the B-D area showed $Fujirock^{(R)}$ to bo the lowest with $0.13{\pm}0.07$mm, Epoxy $Dies^{(R)}$and increased in the order of $Suprastone^{(R)}$, Die $Keen^{(R)}$. There was significant difference between $Fuji-rock^{(R)}$ and Die Keen(p<0.05). 6. In this experiment, Epoxy $Dies^{(R)}$ showed mean contraction in every calculation area. And when reconstruction cross arch restorations it is thought that distortion should be considered in every cast material.

상용 기성품 기반 항공기 임무컴퓨터 구현에 관한 연구

양성욱,양준모,이상철,Yang, Sung-Wook,Yang, Jun-Mo,Lee, Sang-Chul 한국항공운항학회 2014 한국항공운항학회지 Vol.22 No.4

In the development of an avionics system, there is a trend of using commercial-off-the-shelf(COTS) equipments in order to reduce the development cost and time. In this paper, we present an implementation of an aircraft mission computer using the objected oriented software and the COTS equipments. We execute the aircraft guidance software on the system, and measure the calculation time and the used memory. To compare the guidance capability of the software program, we implement the same software logic on DS1104 system. The guidance software program executed on two different systems resulted in the almost identical simulation.

척추경나사못을 이용한 척추 고정의 수술적 치험

양성욱,김관태,염진영,김성호,송시헌,김윤 대한신경외과학회 1996 Journal of Korean neurosurgical society Vol.25 No.5

Vertebral transpedicular screws provide secure attachment for posterior spinal fixation device, the authors had experienced 29 cases of transpedicular screw fixation to obtain fixations of the thorcolumbar and lumbar spine instability. the patients were operated between february 1992 and May. 1995. Spinal fusion was attempted at one to four levels of thoracic and lumbar spine. Follow-up period was from 6 to 33months. averaging IS months. The result was summerized as follows : 1) Of the 29 cases. 20 were spondylolisthesis and 9 were fracture and dislocation. 10 patients(34.5%) were 30 years old. and 20 cases(69%) were female. Mean age was 42 years. 2) The symptom included low back pain, sciatica and intemittant claudification in the oder of incidence. 3) The sites of spondylolisthesis were L4-5 in 12 cases(60%) and L5-S1 in 8 cases(40%). The average degree of slippage in spondylolisthesis was Meyerding's grade l(85%). The sites of fracture were T 12 in 5 cases(55.6%), L1 in 2 cases(22.2%). L2 with L3 in 1cases(11.1%) and L1 in 1case(11.1%) 4) There was no patient with significant neurologic injury or functional root loss. A screw malposition was observed in one case. 5) The results of operations were considered exellent in 16 cases(55%). good in 10 cases(35%) and fair in 3 cases(10%). and satisfactory bony fusion was obtained.

순수 외상성 뇌실내출혈에 대한 임상분석

양성욱,송시헌,염진영,김성호,김윤 대한신경외과학회 1996 Journal of Korean neurosurgical society Vol.25 No.5

Although intraventricular hemorrhage is readily identifiable with computerized tomography, there has been little systematic study of its significance in head trauma. The authors had analysed 13 patients with pure intraventricular hemorrhage among a total of 104 patients who had traumatic intraventricular hemorrhage(TIVH). Clinical evaluation of patients was made according to the Glasgow Coma Scale(GCS) and their outcome was graded according to the Glasgow Outocome Scaie(GOS). The initial clinical findings, the site and amount of ventricular hematoma and the final outcome were analysed Pure-TIVH was identified in 13(0.8%) out of 1596 patients who were admitted following head trauma. Hemorrhage involved only in the lateral ventricle in 9 cases : the 3rd or 4th ventricle in 3 cases, and involved all ventricles in 1 case. Eleven patients(GCS>7) had good outcomes while the outcomes were poor in two patients(GCS < 6)

역해석 기법을 이용한 수치해석 결과의 오차 분석 연구

양성욱,이상철 한국항공우주학회 2007 한국항공우주학회 학술발표회 논문집 Vol.- No.-

음성인식을 위한 오류 역전파 방식의 신경망 학습

양성욱,김의창,이태경 東國大學校 嶺南地域發展硏究所 1996 地域發展硏究 Vol.2 No.1