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RF-magnetron Sputtering Process를 이용한 a-축 우선 배향된 PLZT(x/0/100)박막의 제조
박명식,강승국,노광수,김동범,조상희,Park, Myung-Sik,Kang, Seung-Kuk,No, Kwang-Soo,Kim, Dong-Num,Cho, Sang-Hee 한국재료학회 1997 한국재료학회지 Vol.7 No.6
RF-magnetron Sputtering Process를 이용하여 Pt/Ti/Si(100)기판위에 lanthanum-modified lead titanate 박막을 제작하였다. 기판온도와 증착시간이 증가함에 따라 증착율은 감소하였다. 기판온도가 증가함에 따라 fine grain들은 large grain으로 변화하였다. Perovskite구조는 기판온도 54$0^{\circ}C$, gas pressure 30mtorr에서 나타나기 시작하였다. 본 실험에서 perovskite 박막제작에 대한 조건은 기판온도 58$0^{\circ}C$, gas pressure 30mtorr였다. Pt/Ti/Si(100) 우선 배향된 박막을 얻었다. La양이 증가함에 따라 유전율, 항전계, 잔류분극량은 증가하였다. 중심주파수가 44.7MHz, 전파속도는 2680m/sec를 가지는 SAW filter 특성을 얻었다.
강직성 척추염에 시행한 고관절 전치환 성형술 -4례보고-
박명식 ( Myung Sik Park ),강한수 ( Han Soo Kang ) 대한고관절학회 1993 Hip and Pelvis Vol.5 No.1
Ankylosing spondylitis is a disease of the spine occuring in late adolescence or early childhood characterized pathologically by progressive inflammation of the spine, sacroiliac joints, and the lager joints of the extremities, particulary the hips, knees, and shoulders, and leading to fibrous or bony ankylosis and deformity. Total hip arthroplasty in patients with ankylosing spondylpitis is indicated in the hip with poor posture and or painful motion. At the department of Orthopaedic surgery of Chonbuk University Hospital, between 1991 and 1992, total hip arthroplasty was performed in 3 patients(4 hips) who had ankylosing spondylitis, and has reviewed since two months "o one year and four months after operation and the results are as follows. l. All patient was male and the HLA-B27 antigen was negative and all were definite ankylosing spondylitis diagnosed. 2. Duration of immobility of the involved hip ranged from five to ten years. 3. Involvement of the cervical spine or of the temporomandibular joint causes difficulties in anesthesia, particularly with intubation. So we tracheal intubation. 4. We routinely used EHDP pre and postoperative. Only One patient was developed heterotopic ossification(Brooker grade II). 5. The average Harris score of the four hips before arthroplasty and after was 36.3 and 73.3 But most patient was multiple involved joint.
인공고관절 치환술에 관련된 대퇴골 골절 -새로운 분류와 치료법-
박명식 ( Myung Sik Park ),김정렬 ( Jung Ryul Kim ) 대한고관절학회 1996 Hip and Pelvis Vol.8 No.1
The femur fracture after hip arthroplasty(0.1-3.2%) is a well-known complication. According to the previous reports, it is more frequently observed in noncemented arthroplasty of the hip As the causes of these fractures, tight fixation of the femoral stem, design preblem of femoral stem and design of femoral stem and anatomical configuration of the femur should be considered. Among 600 cases, who were treated by hip arthroplasty from Dec. 1984 to Dec. 1995, the 42 cases of the 38 patients of the femoral fractures were evaluated. The authors tried to make a new classification and find out the best reported treatment methods. The authors classified intraoperative or postoperative femoral fractures according to the location and type. The most common type was A(proximal, 64%). We recommend more than 8 hole plate and bone graft in stable prosthesis. In unstable prosthesis, we recommend longer stem for the treatment of fracture.
외상성 진구성 고관절 골절 탈구에 의한 비구결손시 시행한 고관절 전치환술
박명식 ( Myung Sik Park ),노철규 ( Cheul Kyu Rho ),이승환 ( Seung Hwan Lee ) 대한고관절학회 1992 Hip and Pelvis Vol.4 No.1
Unreduced fracture-dislocation of the hip in a polytraumatized patient is usually the results of a traffic accident. The threatening emergencies are dealt with first, and the solution of the hip problem is sometimes postponed or even neglected. The patients come for treatment several months after the accident. Surgical reduction and acetabular reconstruction at this stage are almost impossible because of acetabular bone loss, fibrosis, and avascular ner.rosis of the femoral head. Recent concept is that total hip arthroplasty can be the solution for a patient suffering from a persistent to perform the procedure by a one-staged operation. The authors report four cases of unreduced fracture-dislocation of the hip treated by hip arthroplasty.
일반 수술 침대와 짧은 대퇴 주대를 이용한 인공 고관절 전 치환술의 직접 전방 도달법과 변형된 전 측방 도달법에 따른 결과 비교
박명식(Myung-Sik Park),윤선중(Sun-Jung Yoon),최승민(Seung-Min Choi),조홍만(Hong-Man Cho),정우철(Woochull Chung),강경록(Kyung-Rok Kang) 대한정형외과학회 2019 대한정형외과학회지 Vol.54 No.3
목적: 일반 수술용 침대와 길이가 짧은 대퇴 주대(short stem)를 이용하여 인공 고관절 전 치환술을 직접 전방 도달법(direct anterior approach, DAA)을 이용하여 시행하고, 임상적 영상의학적 결과를 변형된 전 측방 도달법(modified Hardinge; anterolateral approach, ALA)을 시행한 경우와 비교하여 알아보고자 하였다. 대상 및 방법: 2013년 1월부터 2015년 11월까지 단일 술자가 DAA로 인공 고관절 전 치환술을 시행한(DAA group) 102명(102예)과 동 수의 ALA를 사용한 환자(ALA group)를 후향적으로 비교 분석하였다. 수술시간과 출혈량을 비교하였고, 수술 후 통증의 개선 정도와 보행 능력 및 고관절의 기능 회복을 알아보았다. 영상의학적으로 비구 컵과 대퇴 주대의 삽입 위치를 평가하였고, 두 군 간에 발생한 합병증을 알아보았다. 결과: 출혈량은 DAA group에서 유의하게 적었다(p=0.018). 수술 후 3주까지는 하지 근력의 회복이 DAA group에서 유의하게 높았다(굴곡/신전력 p=0.023, 외전력 p=0.031). Harris hip score를 이용한 기능 평가는 3개월까지(p≤0.001), Koval score를 이용한 보행 능력 평가는 6주까지(p≤0.001) DAA group에서 유의하게 나은 결과를 보였고, visual analogue scale score를 이용한 통증의 개선은 7일까지는 DAA group에서 유의하게 높았다(p=0.035). 비구 컵의 경사각(p≤0.001)과 전염각(p≤0.001)은 DAA group에서 ALA group보다 더 안정 범위에 위치하였고, 대퇴 주대의 위치와 하지 길이는 통계적 유의한 차이를 보이지 않았다. DAA group에서 수술 중 2예의 대전자 골절이 발생하였다(p=0.155). 결론: 길이가 짧은 대퇴 주대를 이용하여 일반 수술 침대에서 시행하는 DAA는 수술 후 조기 기능 회복을 보이며, 술자에게 친숙한 해부학적 자세로 수술 중 영상 증폭기 사용이 간편하여 원하는 위치에 인공 관절물을 삽입하는 것과 하지 부동 방지에 유용한 도달법으로 생각된다. Purpose: Total hip arthroplasty was performed using a direct anterior approach (DAA) on an ordinary operation table and a short femoral stem. The clinical radiographic results were evaluated by a comparison with those performed using the modified hardinge (anterolateral approach, ALA) method. Materials and Methods: From January 2013 to November 2015, 102 patients who underwent total hip arthroplasty using DAA (DAA group) and the same number of patients using ALA (ALA group), both performed by a single surgeon, were compared and analyzed retrospectively. The operation time and amounts of bleeding were compared, and the improvement in post-operative pain, ambulatory capacity and functional recovery of the hip joint were checked. The location of insertion of the acetabular cup and femoral stem were evaluated radiologically, and the complications that occurred in the two groups were investigated. Results: The amount of bleeding was significantly smaller in the DAA group (p=0.018). Up to 3 weeks postoperatively, recovery of hip muscle strength was significantly higher in the DAA group (flexion/extension strength p=0.023, abduction strength p=0.031). The Harris hip score was significantly better in the DAA group for up to 3 months (p<0.001) and the Koval score showed significantly better results in the DAA group up to 6 weeks (p≤0.001). The visual analogue scale score improvement was significantly higher in the DAA group by day 7 (p=0.035). The inclination angle (p<0.001) and anteversion angle (p<0.001) of the acetabular cup were located in the safe zone of the DAA group more than in the ALA group, and there was no statistically significant difference in the position of the femur stem and leg length difference. During surgery, two cases of greater trochanter fracture occurred in the DAA group (p=0.155). Conclusion: The DAA performed in the ordinary operation table using a short femoral stem showed post-operative early functional recovery. Because a simple to use fluoroscope was used during surgery with an anatomical position familiar to the surgeon, it is considered to be useful for the insertion of implants into the desired position and for an approach that is useful for the prevention of leg length differences.