1.Tetracycline as an aid to the excision of nidus in osteoid osteoma.
Eun Woo LEE ; Eui Chan JANG ; Nam Chul PAIK
The Journal of the Korean Orthopaedic Association 1992;27(6):1488-1492
No abstract available.
Osteoma, Osteoid*
;
Tetracycline*
2.Radiological Study of Spondylolysis in Korean Laborer
Eun Woo LEE ; Ki Ser KANG ; Eui Chan JANG
The Journal of the Korean Orthopaedic Association 1986;21(5):813-816
The spondylolysis is a defective ossification in the pars interarticularis of the neural arches without displacement of the vertebral body. The authors analysed 810 lumbar spines of adult Korean laborers on the basis examined to determine the anatomic characteristics of spondylolysis. The following results were obtained. 1. The overall incidence in laborer was 6.8%. 2. The most frequent site of the involvement was the fifth lumbar vertebra. of radiologic study and 3. Spina bifida in spodylolysis was approximately 1.7 times as frequent as is normally expected. 4. Lumbarization in spondylolysis was approximately 5.8 times as frequent as is normally expected. 5. Sacralization was not found in 55 cases of spondylolysis.
Adult
;
Humans
;
Incidence
;
Spinal Dysraphism
;
Spine
;
Spondylolysis
3.Prevalence of lumbosacral transitional vertebrae and their relationship with herniated intervertebral disc.
Eun Woo LEE ; Eui Chan JANG ; Nam Chul PAIK ; Ho Rim CHOI
The Journal of the Korean Orthopaedic Association 1993;28(1):155-163
No abstract available.
Intervertebral Disc*
;
Prevalence*
;
Spine*
4.Chronic injury to the distal ulnar growth plate.
Eun Woo LEE ; Eui Chan JANG ; Ki Seong KIM ; Ho Rim CHOI ; Jun Han LEE
The Journal of the Korean Orthopaedic Association 1993;28(3):1079-1083
No abstract available.
Growth Plate*
5.Repair of Osteochondral Defect Using Grafts of Cultured Chondrocytes in Rabbits.
Eun Woo LEE ; Soo Yong KANG ; Eui Chan JANG ; Ki Hwan KIM
The Journal of the Korean Orthopaedic Association 1997;32(2):464-471
Chondrocytes isolated from the articular cartilage of rabbit knee joint were cultured in vitro within fibrin glue carrier for 2 weeks. Histochemical and electromicroscopical approaches were used to study chondrocytes behavior and phenotypic expression. In vitro study, chondrocyte assumed a rounded morphology, accumulated metachromatic matrix and took on the cytological characteristics of in vivo cartilage cells. Allogenic cultured chondrocyte in fibrin glue was transplanted into osteochondral defect in rabbit joint. The contralateral knee joint served as a control in which the defect was left empty. This in vivo study was performed for the investigation of the chondrogenic potential of cultured chondrocytes embedded in fibrin glue. Grafted defects was filled with cartilage in gross finding, repaired tissue consisted of differentiated chondrocytes and matrix resumed that of hyaline cartilage. At sixteen week after transplantation, subchondral region was partially transformed into bone without loss of overlying articular cartilage, but in control group, defect did not heal successfully. Repaired articular cartilage was thicker than host cartilage and tide mark was not shown up to 24 weeks. Some of repaired tissue was degraded partially. These results suggest that fibrin glue provides suitable environment for differentiation of chondrocyte and allograft of cultured chondrocyte in fibrin glue transplanted into large osteochondral defect improves cartilage repair.
Allografts
;
Cartilage
;
Cartilage, Articular
;
Chondrocytes*
;
Fibrin Tissue Adhesive
;
Hyaline Cartilage
;
Joints
;
Knee Joint
;
Rabbits*
;
Transplantation
;
Transplants*
6.Pain after Use of the Central Third of the Patellar Tendon for Anterior Cruciate Ligament Reconstruction: Ipsilateral vs . Contralateral side Harvesting Group.
Young Bok JUNG ; Eui Chan JANG ; Jae Kwang YUM ; Jin Soo KIM
Journal of the Korean Knee Society 1997;9(2):157-161
graft as a successful procedure that provides functional stabiIity. Complications reported include arthro5brosis, patellofemoral joint pain, patellar tendinitis, patellar tendon rupture, recurrent laxity, posterolateral instabi5ty, medial subluxation of the patella, chronic knee pain and painful neuroma. Among them, anterior knee pain was the rnost frequent eomplication. Authors performed arthroscopy assisted one tunnel technique for reconsction of the ACL using autogenous Bone Patellar tendon-Rone (BPTB) in 87 patients. Patients were divid@d into two groups based on the harvested side (knee) of the BPTB. Group 1 consisted of 45 cases of ipsilateral side and group 2 consisted of 42 cases of contralsteral side in harvesting the BPTB. The patients were foll4wed up for at least 12 months to determine whether using the BPTB harvested from the contralateral knee wguld reduce the anterior knee pain at the ACL reconstructed knee. Althaugh there were no statistically signifiqant differences between group 1 and 2 with regard to anterior knee pain, the prevalence of the anterior knee pain was less frequent in group 2 than group 1. This study showed that using the contralateral side harvested autogenous patellar tendon would be a possible protector for anterior knee pain and assists for early rehabilitation.
Anterior Cruciate Ligament Reconstruction*
;
Anterior Cruciate Ligament*
;
Arthroscopy
;
Humans
;
Knee
;
Neuroma
;
Patella
;
Patellar Ligament*
;
Patellofemoral Joint
;
Prevalence
;
Rehabilitation
;
Rupture
;
Tendinopathy
;
Transplants
7.A Biomechanical Study of Two Kinds of Tapered Pedicle Screws in Osteoporotic Lumber Spine.
Eui Chan JANG ; Jung Hwan SEO ; Kwang Sup SONG ; Ho Sung RYU
The Journal of the Korean Orthopaedic Association 1999;34(5):955-962
PURPOSE: To compare the pullout strength and insertion torque of proximally tapered screw (PT) with fully tapered screw (FT) and to investigate the correlation between the pullout strength and bone mineral density, morphology of pedicle, and insertion torque of the screw in osteoporotic lumbar spine. MATERIALS AND METHODS: Fifteen osteoporotic lumbar vertebrae from four white human cadavers were used. Bone mineral density, pullout strength and insertion torque were measured by dual energy x-ray absorptiometry, MTS and torque screw driver individually. RESULTS: The FT screw provided greater pullout force and insertion torque than the PT screw in 12 of 15 vertebrae tested (p<0.01). Pullout strength was correlated with insertion torque in PT (r=0.666, P=0.0006) and FT (r=0.464, P=0.19) screws. CONCLUSIONS: Results of this study indicate that the FT screws provide higher pullout strength and insertion torque than PT screws in osteoporotic lumbar spine and suggest that the development of tapered minor diameter may lead to an improved pedicle screw with high pullout strength and insertion torque. Nevertheless, further study is needed to investigate the effect of tapering the minor diameter on the mechanical bending strength of the screw.
Absorptiometry, Photon
;
Bone Density
;
Cadaver
;
Humans
;
Lumbar Vertebrae
;
Spine*
;
Torque
8.Comparison of Patella Retention Versus Resurfacing in Total Knee Arthroplasty: Preliminary report.
Yung Bok JUNG ; Jae Kwang YUM ; Jin Woo LEE ; Eui Chan JANG
The Journal of the Korean Orthopaedic Association 1997;32(7):1475-1482
There is a controversy in patella retention or resurfacing in total knee arthroplasty (TKA) till today. Authors studied 52 cases of 45 patients recieved total knee arthroplasty with patella retention (Group 1, twenty-five cases) or patella resurfacing (Group 2, twenty-seven cases) in patients with osteoarthritis. All operations were done by senior surgeon and the implants used were LCS type (33 cases), AMK type (12 cases), Genesis type (5 cases) and Tricon M type (2 cases). The indications of patella retention were small patella, nearly normal articular cartilage, minimal pre-operative patellofemoral pain, poor patellar bone quality and young patients. Patella retention were performed only with LCS prosthesis, which patella groove of the femoral component is deep and anatomical. The operative approaches used were medial parapatella approach in neutral or varus knee and lateral parapatella approch for severe valgus knee and tilting or lateral subluxation of the patella. The mean follow-up period was 24 months (range 12 months to 5 years). The method for clinical evaluation was Hospital for Special Surgery (HSS) knee scoring (consisted of pain, function, range of motion). The method for radiographical evaluation was Knee societys radiologic evaluation system for tibial and femoral alignment, and Keblishs method for patello-femoral congruence. The clinical HSS knee score was average 90.9 points in both groups, and 91.9 points in group 1, 90.0 points in group 2, and there was no statistically difference in HSS knee score between the two groups (P<0.05). The radiologic results had no significant difference in alignment and patello-femoral congruence between the two groups (P<0.05). But the complications were one case of patella fracture, one patella tendon rupture, one anterior instability and two cases of infection in group 2. In conclusion, the results of both groups were satisfactory. We think that it have relation to strict selection of the patients for patella retension and the use of prosthesis that the patella groove of femoral component is deep and anatomical.
Arthroplasty*
;
Cartilage, Articular
;
Follow-Up Studies
;
Humans
;
Knee*
;
Osteoarthritis
;
Patella*
;
Patellar Ligament
;
Prostheses and Implants
;
Rupture
9.Bone Cell Viability after Exposure to Air.
Eui Chan JANG ; Eun Woo LEE ; Soo Yong KANG ; Ki Ser KANG
The Journal of the Korean Orthopaedic Association 1997;32(6):1464-1469
Dryness has harmful effect on the harvested autogenous bone. But there was no report how the bone cells response to the drying condition and recuperate after exposure. Cytotoxic effect of dryness on the osteoblast-like cells were examined from 18- day chick calvaria. The cells were rinsed with lactated Ringer solution or lactated Ringer solution with 10% fetal bovine serum to see whether the added serum could help the cells live longer. Cultured cells were exposed to room air for period of time ranging from 0 minute to 35 minutes and viability was determined using the MTT test. Cultured cell death increased with the increase of exposure time to air between 25 and 30 minutes. No live cells existed after 35 minutes exposure. Lactated Ringers solution containing 10% fetal bovine serum did not prolong the survival time of osteoblast-like cells compared with lactated Ringers solution alone. These results suggest that the drying of bone cells that occurs in the operating room, especially after a prolonged reconstructive procedure, may severely damage the cell viability of exposed bone or grafted bone and thereby compromise the fusion rate.
Cell Survival*
;
Cells, Cultured
;
Operating Rooms
;
Skull
;
Transplants
10.Delayed subclavian - Vein thrombosis Following Nonunion of the Clavicular Fracture: A Case Report.
Eui Chan JANG ; Eun Woo LEE ; Soo Yong KANG ; Ki Ser KANG
The Journal of the Korean Orthopaedic Association 1997;32(6):1446-1449
The possibility that immediate neurovascular injury will follow fracture of the clavicle has been generally known. A case of delayed involvement of the subclavian vein following a nonunion of clavicular fracture is reported emphasizing the proper reduction and union of the clavicle fracture is essential if delayed neurovascular complication are to be avoided or treated.
Clavicle
;
Subclavian Vein
;
Thrombosis*
;
Veins*