荒凉 (p.90-91)

金光均 文章社 1940 文章 Vol.2 No.7

The Accuracy of Alignment Determined by Patient-Specific Instrumentation System in Total Knee Arthroplasty

김광균,Jungsung Kim,이도경,Sohui Lim,Jiyoon Eom 대한슬관절학회 2019 대한슬관절학회지 Vol.31 No.1

Purpose: The aim of this study is to assess the accuracy of alignment determined by patient­specific instrumentation system in total knee arthroplasty (TKA).Materials and Methods: Twenty­seven TKAs using patient­specific instrument were reviewed. The intraoperative pin location determined by the patient­specific guide was recorded using imageless navigation software. Data recorded included tibial coronal alignment and posterior slope, femoral coronal alignment and sagittal alignment, and transepicondylar axis. A discrepancy within ±3° in each plane was considered an acceptable result. Results: On the tibia, an acceptable alignment was obtained in 24 (88.1%) in the coronal plane and 21 (77.8%) in the sagittal plane. On the femur, a satisfactory alignment was obtained in 25 (92.6%) in the coronal plane and 24 (88.1%) in the sagittal plane. Based on the transepicondylar axis, a satisfactory alignment was obtained in 23 (85.1%).Conclusions: Satisfactory alignment was obtained in more than 85% of each plane of the femur and in the coronal plane of the tibia and relative to the transepicondylar axis. Sufficeint experience and precise preoperative planning are required to improve the accuracy of sagittal alignment of the tibia.

Isolated Posterior Malleolar Fracture of Ankle Occurring with Total Knee Arthroplasty in Severe Osteoporotic Patient

김광균 대한골다공증학회 2014 Osteoporosis and Sarcopenia Vol.12 No.2

There are numerous reports of fractures associated with total knee arthroplasty. But, to our knowledge, isolated posterior malleolus fracture associated with TKR has not previously been reported. Here, we report a case of isolated posterior malleolar fracture that occurred with total knee arthroplasty. The patient was informed that data concerning the case would be submitted for publication

설야(雪夜)

김광균 대한사립학교장회(구 대한사립중고등학교장회) 2003 私學 Vol.106 No.-

시를 쓴다는 것이 이미 부질없고나

김광균 새얼문화재단 1996 황해문화 Vol.13 No.-

Changes in Bone Mineral Density of Both Proximal Femurs after Total Knee Arthroplasty

김광균,원예연,허영무,이대희,윤정용,성원섭 대한정형외과학회 2014 Clinics in Orthopedic Surgery Vol.6 No.1

Background:This study investigated the effects of total knee arthroplasty (TKA) on bone mineral density (BMD) of the proximal femur in patients who underwent the procedure. Methods: Forty-eight patients scheduled to undergo unilateral TKA because of primary knee osteoarthritis were included in this study, which was conducted at a medical center between October 2006 and October 2009. In these 48 patients, 96 hips were evaluated. Measurement of BMD was performed preoperatively and one month, three months, six months, and one year after unilateral TKA. Repeated measured analysis of variance and paired t-tests for comparison of two repeated samples were used to compare differences between time points (preoperation, one, three, six, and 12 months) and between the operative and nonoperative sides. Results: Preoperatively, BMD of the femoral neck, trochanter, and total hip on the operative side were lower than on the nonoperative side; however, there was no statistical difference. BMD of both femoral neck areas was significantly lower than preoperative BMD at one month and three months after TKA. BMD of both trochanter areas was significantly lower than preoperative BMD at one month and three months after TKA. BMD of both total hips was significantly lower than preoperative BMD at three months after TKA. However, no statistical differences of changes in BMD were observed between the operative and nonoperative sides at each measurement time. Conclusions: According to our results, TKA was found to affect both proximal femurs during the acute period. However, TKA did not affect a change in BMD of the proximal femur during one year postoperative.

1 월의 포토포엠 : 설야 (雪夜)

김광균 대한지방행정공제회 1999 地方行政 Vol.48 No.543

점토 함유량에 따른 점토질 모래의 투수 및 압밀 특성 평가

김광균,박두희,유진권,이장근 한국지반공학회 2013 한국지반공학회논문집 Vol.29 No.3

Evaluation of permeability and coefficient of consolidation of clayey sand is critical in analyzing ground stability or environmental problems such as prediction of pollutant transport in groundwater. In this study, permeability tests using a flexible wall permeameter are performed to derive the coefficient of consolidation and permeability of reconstituted soil samples with various mixing ratios of kaolin clays and two different types of sands, which are Jumunjin and Ottawa sands. The test results indicate that the coefficient of consolidation and permeability plots linearly against clay contents in semi-log scale graphs for low clay mixing ratios ranging between 10 to 30%. It is also demonstrated that coefficient of consolidation and permeability of sand and clay mixture are dependent on the soil structure. Contrary to previous findings, the permeability is shown to be independent of the void ratio at low mixing ratios, which can be classified as non-floating fabric. The permeability decreases with the void ratio for floating fabric.

골다공증성 불안정 대퇴골 전자간 골절에서 내고정물의 종류에 따른 방사선학적 결과 비교

김광균,원예연,이우석,조인호 대한골다공증학회 2013 Osteoporosis and Sarcopenia Vol.11 No.1

Objectives: To determine whether kinds of implants would influence on the radiologic outcomes in the treatment of unstable osteoporotic intertrochanteric fractures. Materials and Methods: In this retrospective study, radiologic outcomes of 151 patients with unstable osteoporotic intertrochanteric fractures undergoing surgical treatments were compared based on the types of fixation implants as follows : PFNA (53 cases, group Ⅰ), gamma nail 3(31 cases, group Ⅱ), CHS with TSP (43 cases, group Ⅲ), and helical blade type LCP-DHS with TSP (24 cases, group Ⅳ). On the follow-up radiographs after operations, we assessed differences of bone union durations, neck-shaft ankle changes, lag screw or helical blade slippages, and varus alpha angle changes among the study groups. Results: All the radiologic outcomes evaluated in this study were not significantly different among the study groups. The average bone union durations of the group Ⅰ, Ⅱ, Ⅲ and Ⅳ were 17.7, 18.0, 18.2, and 17.8 weeks, respectively (P=0.429). The average variation of neck-shaft angle of the group Ⅰ, Ⅱ, Ⅲ and Ⅳ were 3.6o, 3.1o, 3.7o and 2.9o, respectively (P=0.273). The average lag screw or blade slippage of the group Ⅰ, Ⅱ, Ⅲ and Ⅳ were 5.1 mm, 3.3 mm, 3.6 mm and 2.7 mm, respectively (P=0.154). The average variation of varus alpha of the group Ⅰ, Ⅱ, Ⅲ and Ⅳ were 5.3o, 4.7o, 4.1o and 4.6º, respectively (P=0.894). Conclusions: This study indicates that four typical types of fixation implants for treating unstable osteoporotic intertrochanteric fractures would not lead to differences in postoperative radiological outcomes.

Changes in the Microstructural and Mechanical Properties in the Medial Condyle of Human Distal Femur in Advanced Osteoarthritis

김광균,Myoung-Hyun Baek,Ye-YeonWon 대한골다공증학회 2012 Osteoporosis and Sarcopenia Vol.10 No.2

Objectives: The purpose of this study is to analyze and compare the micro-structural and mechanical properties of subchondral trabecular bone of non-osteoarthritic and osteoarthritic distal femur using micro-images based on finite element analysis. Materials and Methods: Twenty distal femurs were harvested from 10 cadavers. The subchondral trabeculae were obtained from the middle of the articular surface of the medial femoral condyle of distal femurs. A total of 20 specimens were scanned using the micro-CT system. Micro-CT images were converted to micro-finite element model using the mesh technique, and micro-finite element analysis was then performed for assessment of the mechanical properties. Results: According to the results, trabecular bone of osteoarthritic distal femur showed a decrease in trabecular thickness, bone volume fraction, structure model index, and yield stress and an increase in trabecular separation and structure model index. Conclusions: Results of bone morphometry index and strength showed greater deterioration of microstructure and decreased mechanical strength in subchondral trabeculae of the osteoarthritic group.