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Jong Chul Ahn 21 Articles
Ankle Fracture
Jong Chul Ahn
Yeungnam Univ J Med. 2007;24(2 Suppl):S12-23.   Published online December 31, 2007
DOI: https://doi.org/10.12701/yujm.2007.24.2S.S12
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Ankle fractures are the most common types of fractures treated by orthopaedic surgeons. As a result of a better understanding of the biomechanics of ankle, improvements in fixation techniques, and findings of outcome studies, there has been a gradual evolution in the effective strategics for the treatment of ankle fractures. The goals of treatment continue to be both a healed fracture and an ankle that moves and functions normally without pain. The development of strategies for the treatment of various patterns of ankle injuries revolves around whether these goals can be achieved more predictably with surgical or nonsurgical means. Certain injury patterns have a better outcome after surgical treatment, while other pateerns are better managed without surgery. Surgical treatment is indicated when congruity of the joint cannot be restored with closed method.
An Epidemiologic Study of Low Back Pain of Women Working at a General Hospital.
Dong Gu Park, Myun Whan Ahn, Jong Chul Ahn, Sae Dong Kim, Jae Sung Seo
Yeungnam Univ J Med. 2007;24(2):186-196.   Published online December 31, 2007
DOI: https://doi.org/10.12701/yujm.2007.24.2.186
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AbstractAbstract PDF
BACKGROUND
The aim of this study was to confirm the risk factors for low back pain and injury to improve the prevention and treatment of lower back pain. MATERIALS AND METHODS: An epidemiologic study of low back pain and injury was performed with questionnaires distributed to 471 women working at Yeungnam university hospital. The differences in low back pain and injuries among various hospital departments were analyzed by a one-way analysis of variance (ANOVA), and the relevant factors included in the questionnaire were determined by a factor analysis. RESULTS: The frequency of low back pain in women in the department of diet and in the maintenance department was higher than among the other departments. The frequency of low back pain was mainly related to the frequency of psychosomatic symptoms. In addition, the low back pain was partially related to the frequency of psychosomatic symptoms and partially related to the frequency of pushing during the workday. The degree of disability from low back pain was increased by lifting and hard physical work and was related to the frequency of psychosomatic symptoms and the degree of work dissatisfaction. The frequency of low back injury was increased by increased standing time during work and hard physical work. The frequency of low back injury was related to advancing age and in part to psychosomatic symptoms. CONCLUSION: Lower back pain and its associated complications are related to psychosomatic factors and type of work. Lower back injury is related to physiological factors such as age. For the prevention and treatment of lower back pain, a multidisciplinary approach is required.

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  • Effects of the Hand Acupressure and Lumbar Strengthening Exercise on Women with Lower Back Pain
    Eun Young Jeon
    journal of east-west nursing research.2013; 19(2): 63.     CrossRef
Analysis of Compression Behavior on Intervertebral Disc L4-5 in Pedicle Screw System Instrumented Lumbar Spine under Follower Load.
Myun whan Ahn, Jong chul Ahn, Su ho Lee, Il sub Chung, Choon yeol Lee, Jang woo Lee
Yeungnam Univ J Med. 2003;20(2):160-168.   Published online December 31, 2003
DOI: https://doi.org/10.12701/yujm.2003.20.2.160
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AbstractAbstract PDF
BACKGROUND
Confirm the stability of intervertebral disc sustaining each fused lumbar spine cases, comparing vertical compression, A-P shear force and rotational moment on intervertebral disc of instrumented lumbar spine with simple vertical compression load and follower load using finite element analysis. MATERIALS AND METHODS: We analyze the stability of intervertebral disc L4-5 supporting fused lumbar spine segments. After performing finite element modelling about L1-L5 lumbar vertebral column and L1-L4 each fusion level pedicle screw system for fused lumbar spine fine element model. Intervertebral discs with complex structure and mechanical properties was modeled using spring element that compensate stiffness and tube-to-tube contact element was employed to give follower load. Performing geometrical non-linear analysis. RESULTS: The differences of intervertebral disc L4-5 behavior under the follower compression load in comparision with vertical compression load are as follows. CONCLUSION: As a result of finite element interpretation of instrumented lumbar spine, the stability of L4-5 sustaining fused lumbar segment, the long level fused lumbar spine observed hing stability under follower load. This research method can be the basis tool of effects prediction for instrumentation, a invention of a more precious finite element interpretation model which consider the role of muscle around the spine is loaded.

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  • Spinal Stability Evaluation According to the Change in the Spinal Fixation Segment Based on Finite Element Analysis
    Cheol-Jeong Kim, Seung Min Son, Jin-Young Heo, Chi-Seung Lee
    Journal of the Computational Structural Engineering Institute of Korea.2020; 33(3): 145.     CrossRef
The Effects of Hyperglycemia and Hyperlipidemia on Muscle Glycogen Utilization during Exercise in rats.
Jong Chul Ahn, Dong Woo Lee, Oog Jin Shon, Seuk Kang Lee
Yeungnam Univ J Med. 1999;16(1):34-42.   Published online June 30, 1999
DOI: https://doi.org/10.12701/yujm.1999.16.1.34
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The effects of hyperglycemia and hyperlipidemia on utilization of muscle glycogen during 45 minutes treadmill running(26 m/min, 8 % grade) were evaluated in Sprague Dawley rats, and the charateristic of the 4 different type of muscles, soleus, white and red gastrocnemius, and plantaris, on glycogen utilization were simultameously investigated. Hyperglycemia, 145-165 mg/dL, was induced by oral glucose ingestion, and hyperlipidemia, 444 uEq/L, was induced by combined treatment of intraperitoneal heparine injection and oral 10 % intralipose ingestion. During the hyperglycemic trial, the glycogen utilization of plantaris muscle was decreased by 13 % at 45 minutes duration of treadmill running comparing to the control trial(p<0.05), and the glycogen utilization of white gastrocnemius was also decreased. The sparing tendency of soleus and red gastrocnemius by 5-13 % was observed at 30 and 45 minutes of treadmill running in hyperglycemic trial. There was no glycogen sparing effect of hyperlipidemia in the soleus, red gastrocnemius and plantaris muscle subjected in this experiment during exercise. However, only a slight sparing tendency of white gastrocnemius muscle was observed. In summary, the glycogen sparing effect of hyperglycemia during exercise was observed in plantaris and white gastrocnemius muscles in rats. However, there was no glycogen sparing effect of hyperlipidemia in the 4 hindlimb muscles. It was observed that the glycogen sparing effect of hyperglycemia is more prominant in fast glycolytic muscle fiber.
Utilization of Supercompensated Glycogen of Hindlimb Muscles during Strenous Exercise in Rats.
Chun Bae Jun, Jong Chul Ahn, Dae Deup Song, Suck Kang Lee
Yeungnam Univ J Med. 1997;14(1):137-154.   Published online June 30, 1997
DOI: https://doi.org/10.12701/yujm.1997.14.1.137
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The aim of the present investigation has been to evaluate the depletion pattern of the supercompensated glycogen of hindlimb muscles during strenous exercise in rats. The plan of the maximizing muscle glycogen stores is based on the fact that a glycogen-depleted muscle by exercise will have an increased avidity for glycogen when exposed to a high carbohydrate diet. The glycogen concentration of soleus, red gastrocnemius and plantaris muscle, and liver was measured at 0, 30 and 60 minutes during treadmill exercise. The experimental animals were divided into 5 group - Normal(N), Control(C), 1Hour(1HR:after 1hour of glucose ingestion), 2Hour(2HR:after 2hour of glucose ingestion) and Exercise-1Hour(EX-1HR:glucose ingestion after 1 hour of preloading treadmill exercise)group - for glycogen storage study. The glycogen concentration of soleus, red gastrocnemius and plantaris muscles in N group was 4.57+/-0.34, 5.11+/-0.24 and 6.55+/-0.20 mg/gm wet wt., respectively. The glycogen concentration of soleus and red gastrocnemius in EX-1HR group were about 1.9 and 1.8 times than that of N group, respectively, but the concentration of plantaris was not higher than that of N group. The glycogen concentration of liver in N group was 41.0+/-1.47mg/gm wet wt. and the concentration of the overnight fasted C group wad only 2.9% of the value of N group. The level of glycogen concentration of liver in the other glucose ingested groups(1HR, 2HR, including EX-1HR) was within 19 - 32% of that of N group. The blood glucose concentration of EX-1HR group was higher than that of N group, the plasma free fatty acid concentration of C and 2HR group was higher than that of N group, and the plasma insulin concentration of EX-1HR group was higher than that of N group. The concentration of supercompensated glycogen of soleus and red gastrocnemius were rapidly decreased during 30 minutes of exercise but there was almost no changes of the concentration during the other 30 minutes of continuing exercise. The concentration of N group during 30 minutes of exercise was decreased but more slowly than those of EX-1HR group. The remaining level of glycogen after 60 minutes of exercise in EX-1HR group was higher than that of N group. Taken together, the mobilization of endogenous muscle glycogen at the first stage of exercise was proportioned to the intial level of glycogen concentration, and later on, when exercise continued, the muscle glycogen level was stabilized. And the remaining level of supercompensated muscle glycogen after 60 minutes of exercise was higher than that of normally stored glycogen level. The mobilization of the glycogen stroed in slow and fast oxidative muscle fibers is faster than in the fast glycolytic muscle fibers during strenous exercise.
Histological Observation of Bone Reaction with Relation to Surface Treatment of Titanium.
Myun Whan Ahn, Yong Sug Choi, Jong Chul Ahn, Jae Sung Seo, Dong Chul Lee, Jae Hyuk Jang
Yeungnam Univ J Med. 1996;13(1):116-133.   Published online June 30, 1996
DOI: https://doi.org/10.12701/yujm.1996.13.1.116
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The biocompatibility of the titanium has been estabilished through various experimental studies such as cell culture toxicity test, pyrogen test, mutagen test and others. In order to confirm biocompatibility after fabrication of titanium and to clarify the difference between the bone reaction after insertion of the lathed titanium rods and the bone reaction after insertion of the finished and polished rods, both rods were implanted into the proximal femur of a rabbit. Histologic reactions in the bone were observed according to the ASTM standards at the intervals of 6 weeks, 12 weeks and 26 weeks after implantation. The result were as follows In 6 weeks after implantation of lathed titanium rods, inflammatory reactions, such as minimal degree infiltration of polymorphonuclear leukocytes and lymphocytes were observed in all cases. This was thought to be caused by surgical trauma. However, inflammatory cell infiltration was not seen after implantation of polished and finished rods in all cases. The cellular infiltration and the histologic reaction of the bone after implantation of lathed group were significantly more pronounced than those after implantation of the finished group. In 12 weekt after implantation of lathed rods, two of four cases revealed a minimal degree of cellular infiliration and histologic reaction seemed to be more pronounced in the lathed group, but they were not significant statistically.
Percutaneous K-wire fixation of supracondylar fracture of humerus in children.
Duk Seop Shin, Jong Chul Ahn, Se Dong Kim, Dong Woo Lee
Yeungnam Univ J Med. 1993;10(2):400-408.   Published online December 31, 1993
DOI: https://doi.org/10.12701/yujm.1993.10.2.400
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During the period from March 1990 to November 1993, 22 children with diplaced supracondylar fracture of humerus were treated by closed reduction and percutaneous K-wire fixation at department of Orthopaedic surgery in Yeungnam University. All fracture were treated with closed reduction under the general anesthesia and percutaneous pinning. After the fracture was internally fixed, intraoperative anteroposterior reontgenograms of each distal humerus were compared. Only anatomical reduction ensured good result,, because the main cause of late cubitus varus was medial tilting of distal fragment. We could follow up 10 patients more than one year. By Flynn's criteria, satisfactory result were obtained in 9 of the 10. Unsatisfactory one had a limitation in flexion of elbow joint, but had no problem in cosmetic feature. In short term follow up of 7 patients, 5 patients had a satisfactory result, too. There were no neurovascular complication and hospitalization was shortened to 11.4 days. Closed reduction and percutaneous pinning provided stabillity, vascular safty, simplified management, reduced hospital stay. This is safe and reliable technique for obtaining and maintaining an exellent reduction.
The clinical study of the supracondylar fracture of the femur.
Jong Chul Ahn, Se Dong Kim, Jae Sung Seo, Dong Chul Lee, Young Joo Lee
Yeungnam Univ J Med. 1993;10(1):197-211.   Published online June 30, 1993
DOI: https://doi.org/10.12701/yujm.1993.10.1.197
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Recently, the Supracondyle fracture of the femur is so severe and comminuted that it is difficult to treat open reduction and rigid fixation sufficiently due to violent traffic accident and external forces. The associated injuries are accompanied variously. So compliactions of the supracondyle fractures 'including joint.. stiffness, delayed union, infection are serious. However development of internal implant and operation skill result in relatively satisfactory function than conservative management. The authors reviewed. 20 cases of the supracondyle fracture of the femur treated at Yeungnam University Hospital from 1989. Dec. To 1992. Jan. The results were as follows 1. The male was common(70%). The 2nd-4th decade was most(87%). 2. The most common cause of injuries was traffic accident. The rate of open fracture was 35%, most of it was traffic accident. 3. According to the ASIF group classification, 4 cases were type A, 4 in type B, 12 in type C (10 in type C2&C3). 4. Accompanied injuries included multiple fractures in 9 cases and femoral artery injury in 1 case. 5. Among the 20 cases, conservative treatment was done in 5 cases and operative treatment was done in 15 cases. 6. Functional results (by Schatzker criteria) were as follows. The satisfactory results were achieved in 40% of cases in consevative treatment and 67 in operative treatment. 7. The average time of partial weight bearing was 15 weeks. 8. Complications were knee stiffness in 6 cases and 4 in delayed union.
Treatment of the tibia shaft fractures with ender nails.
In Ki Kim, Dong Chul Lee, Jae Sung Seo, Myun Whan Ahn, Se Dong Kim, Jong Chul Ahn
Yeungnam Univ J Med. 1992;9(1):130-136.   Published online June 30, 1992
DOI: https://doi.org/10.12701/yujm.1992.9.1.130
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Fractures of the tibial shaft are the most common among the long bone fractures, and have much difficulty in treatment due to their numerous complications. Thirty patients with fractures of the tibial shaft were treated with Ender nails under the image intensifier at the Department of Orthopedic Surgery, Yeungnam University Hospital from December 1986 to November 1991. The following results were observed. 1. The average age was 37.3 years and the number of male was three times of the female. The most common cause was traffic accident. 2. Twenty cases out of thirty one were closed fracture and the remaining 11 were open. The comminuted and segmental fractures were 18 (57.7%) in number and the most common fracture site was the middle one third (53%). 3. Average interval from injury to operation was 7.6 days and 19 cases showed associated injuries. 4. The mean duration of the bone union was 18.9 weeks and 2 cases showed the delayed union. 5. Twelve complications were noted such as shortening, varus deformity, delayed union, ankle motion limitation, nail irritation, and soft tissue infection.
Fracture-separation of the distal humeral epiphysis in children.
Ja Woong Koo, Se Dong Kim, Jong Chul Ahn
Yeungnam Univ J Med. 1991;8(2):121-127.   Published online December 31, 1991
DOI: https://doi.org/10.12701/yujm.1991.8.2.121
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We have reviewed seven cases of fracture-separation of the distal humeral epiphysis, one of which was initially misdiagnosed as a fracture of the lateral condyle. There were difficulties in making the diagnosis. The injury must be distinguished from an elbow dislocation and a fracture of the lateral humeral condyle. All seven patients revealed posteromedial displacement of the distal humeral epiphysis on initial x-rays. Three patients were treated by closed reduction and cast immobilization, and four patients by open reduction and internal fixation. All three patients with conservative treatment had slight cubitus varus (under 5 degrees). Two patients with operative treatment had significant deformities of the elbow, one 25 degrees of valgus and one 20 degrees of varus. In treatment of these injuries, accurate evaluation of the state of reduction is most important. We got acceptable results with a conservative treatment.
Two cases of disc internal disruption syndrome.
Jong Hyeung Lee, Myun Whan Ahn, Jong Chul Ahn
Yeungnam Univ J Med. 1991;8(1):238-245.   Published online June 30, 1991
DOI: https://doi.org/10.12701/yujm.1991.8.1.238
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The disc internal disruption syndrome is not well known to us, but the following hypothesis is widely accepted in clinical practice. The disc internal disruption syndrome may develop intractable back pain with aggravated of pain, loss of spinal motion with any physical exercise, leg pain, loss of energy, marked weight loss, and profound depression. The patient with this syndrome will be found to have normal plain roentgenograms, myelograms, CT scans, results of blood examination and neurologic findings. For these reasons, this syndrome was frequently diagnosed by abnormal discographic findings. We had experience with two cases of disc internal disruption syndrome with clinical, roentgenographic and discographic evaluations. Thus we present these case with a brief review of the concerned literature.
Treatment of bone tumors with a custom-made prosthetic replacement.
Hyun Kug Shin, Jae Sung Suh, Jong Chul Ahn, Joo Chul Ihn
Yeungnam Univ J Med. 1991;8(1):206-214.   Published online June 30, 1991
DOI: https://doi.org/10.12701/yujm.1991.8.1.206
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We treated three cases of bone tumors-giant cell tumor, chondroblastoma and malignant fibrous histiocytoma-with a custom-made prosthetic replacement. The patients were followed from 10 months to 18 months, postoperatively. The results of these study are as follows: 1. Satisfactory anatomic restoration 2. Early ambulation 3. Good function 4. Biomechanically sound reconstruction
Plantigrade Foot.
Jong Chul Ahn
Yeungnam Univ J Med. 1991;8(1):1-11.   Published online June 30, 1991
DOI: https://doi.org/10.12701/yujm.1991.8.1.1
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AbstractAbstract PDF
No abstract available.
Three Cases of Unusual patterns of Pyogenic Spondylitis.
Myun Whan Ahn, Dae Jin Suh, Jong Chul Ahn, Joo Chul Ihn
Yeungnam Univ J Med. 1990;7(2):189-195.   Published online December 31, 1990
DOI: https://doi.org/10.12701/yujm.1990.7.2.189
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AbstractAbstract PDF
Pyogenic vertebral osteomyelitis is rare. It most commonly occurs at the lumbar area and in the fifth to seventh decades of life. Most individuals present with back pain, abdominal pain, hip pain and meningeal syndrome. We experienced three cases of unusual patterns of pyogenic osteomyelitis. The first case developed after sepsis. The second case developed after open fracture and infection of other site. The third case was misdiagnosed as metastatic cancer. We present these cases with a brief review of literatures.
A study of the cause of metal failure in treatment of femur shaft fracture: Fractographical and clinical analysis of metal failure.
Chun Bae Jeon, Jae Sung Seo, Jong Chul Ahn, Myun Whan Ahn, Joo Chyl Ihn
Yeungnam Univ J Med. 1990;7(1):81-93.   Published online June 30, 1990
DOI: https://doi.org/10.12701/yujm.1990.7.1.81
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The author fractographically analyzed the cause of metal failure (the first time this procedure has been used for this metal failure) and also analyzed in clinically. In this study, I selected eight cases which have been analyzed fractographically. In all these cases, the analysis was done after treatment of metal failure of implants internally fixed to femur shaft fractures at the Department of Orthopedic Surgery, Yeung-Nam University Hospital during the six year period from May 1983 to September 1989. 1. Metal failure occurred in five dynamic-compression plates, one Jewett nail, one screw in Rowe plate, and one interlocking nail. 2. The clinical cause of metal failure was deficiency of medial buttes in five cases, incorrect position of implant in one case, and incorrect selection of implant in two cases. 3. The time interval between internal fixation and metal failure was four months in one case, between five months to twelve months in six cases, three years in one case. 4. The fractographically analytical cause of metal failure was ; first, impact failure, one case, second, fatigue failure, six cases, machining mark (stress riser), four case type: low consistent cyclic fatigue failure irregular cyclic fatigue failure third, stress corrosion crack, one case. 5. 316 L Stainless Steel has good resistance to corrosion. However, when its peculiar surface film is destroyed by fretting, it shows pitting corrosion. This is, perhaps, the main cause of metal failure. 6. It is possible that mechanical injury occurred in implants during the manufacturing of implants or that making a screw hole in the main cause of metal failure.
Photoelastic analysis of the Stress distribution on an intervertebral disc.
Hyun Kug Shin, Jae Chang Lee, Myun Whan Ahn, Jong Chul Ahn, Joo Chul Ihn
Yeungnam Univ J Med. 1989;6(2):223-239.   Published online December 31, 1989
DOI: https://doi.org/10.12701/yujm.1989.6.2.223
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AbstractAbstract PDF
To observe the change in the status of stresses according to three different postural angulation of an intervertebral disc with or without nucleus pulposus, 6 specimens of a 3-dimensional photoelastic model of the spine were made of epoxy. The nucleus pulposus portion was replaced with silicon in three models, and the three were made without silicon. Through axial application of a vertical compressive load of 8 kg, the peculiar patterns of the isochromatic fringes were observed. Stresses on the intervertebral disc were analyzed according to three different postural angulations of the intervertebral disc with the nucleus pulposus and without the nucleus pulposus. The results of these study are as follow: 1. In an erect neutral posture with the nucleus pulposus, the stress concentration was much increased at the posterior portion rather than at the anterior portion. Also, the high stress was concentrated at the medial and central portion. In an erect neutral posture without the nucleus pulposus, the stress concentration was much increased at the anterior portion rather than at the posterior portion and the stress distribution seemed to be locally concentrated. 2. In a maximal flexed posture, the stress concentration was much increased at the posterior portion rather than at the anterior portion. Comparing the presence of the nucleus pulposus with the absence of the nucleus pulposus, the stress concentration was lower at the anterior portion in the presence of the nucleus pulposus than in the absence of the nucleus pulposus. However, the stress distribution at the posterior portion was nearly same in the two groups. According to the analysis of the stress distribution diagram, as a whole, the stress pattern around the disc was evenly distributed. 3. In a maximal extended posture, the higher concentration of the stress distribution at the anterior and medial portion rather than in the posterior and lateral portion was observed. The stress concentration was higher in the presence of the nucleus pulposus than in the absence of the nucleus pulposus. 4. Comparing the maximal flexed posture with the erect neutral posture, the stress concentration in the flexed posture was much decreased in the posterior portion rather than in the erect neutral posture, and an even distribution of the stress pattern in the flexed posture was observed. 5. In the presence of the nucleus pulposus, at the anterior and posterior portion, the stress concentration in the flexed posture was much decreased compared with the extended posture. In the absence of the nucleus pulposus, at the anterior and posterior portion, the stress concentration in the extended posture was much decreased compared with the flexed posture.
Two Cases of Allergic Contact Dermatitis to Betadine(R).
Kae Yong Hwang, Byung Chun Mun, Jong Soo Choi, Ki Hong Kim, Jong Chul Ahn
Yeungnam Univ J Med. 1986;3(1):387-393.   Published online December 31, 1986
DOI: https://doi.org/10.12701/yujm.1986.3.1.387
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AbstractAbstract PDF
Antiseptics are substances that kill or prevent the growth of microorganisms when applied to living tissue. They must be effective against microorganisms but must also retain their activity in presence of body fluids without being harmful locally or systemically. Among many antiseptics, Betadine(R) has been widely used because of its low toxicity and high germicidal efficacy. We reported 2 cases of allergic contact dermatitis to Betadine(R) in surgical patients. They had eczematous eruption along the Betadine(R) applying sites. Path tests Betadine(R) confirmed the diagnosis.

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Treatment of Carpal Scaphoid Fracture.
Won Jin Beck, Jae Sung Seo, Jong Chul Ahn, Joo Chul Ihn
Yeungnam Univ J Med. 1986;3(1):361-366.   Published online December 31, 1986
DOI: https://doi.org/10.12701/yujm.1986.3.1.361
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AbstractAbstract PDF
Fracture of the carpal scaphoid bone is the most common fracture of the carpus. Unfortunately, nonunion are common since the symptoms do not alert patents to seek early medical treatment and the diagnosis is easily missed. Fracture of the scaphoid is a common condition whose management remains controversial. The conservative treatment has many complications, these include inability to word while in plaster, stiffness of the wrist afterwards, muscle wasting, weakness and malunion. So various operative treatments of scaphoid fracture have been developed. Open reduction by use of screws suggested by Maclaughlin first in 1954. In 1984 a new and simple operative technique has been developed to provide rigid internal fixation for all types of fractures of the scaphoid by T.J. Herbert. This involves the use of a double-treaded bone screw which provides good fixation that, after operation, a plaster cast in rarely required and most patients are able to return to work within a few weeks. Authors have experienced 10 cases of scaphoid fracture and accomplished good result in all cases by internal fixation using Herbert screw. The results are as follows Of these 10 fractures, 2 were fresh fractures and 8 were nonunions of scaphoid fracture. In nonunion cases, the time interval between fracture and operation was from 5 months to 5 years. The postoperative immobilization period was average of 4 weeks. Short period of immobilization achieved early functional recovery of the wrist. The bony unions in roentgenogram were seen from 3 months to 9 months after operation. In 2 cases the fracture gap was seen after 9 months. But in these cases the symptoms such as pain and range of motion of wrist were improved.
The Effect of Tension Band Wiring in the Treatment of the Olecranon Fracture.
Joo Chul Ihn, Jong Chul Ahn, Sae Dong Kim, Myun Whan Ahn, Jae Sung Seo
Yeungnam Univ J Med. 1985;2(1):59-63.   Published online December 31, 1985
DOI: https://doi.org/10.12701/yujm.1985.2.1.59
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AbstractAbstract PDF
Treatment of the olecranon fractures by prolonged immobilization often results in limited elbow motion. With the use of tension band wiring, anatomical reduction was obtainable, and only a short period of immobilization was needed. We reviewed the cases of 17 patients who underwent surgical treatment of the olecranon fracture. All patients were treated by tension band wiring. In the overall series, we were able to obtain 53 percent excellent, 30 percent good, and 18 percent fair results.
Classification and Treatment of Epiphyseal Growth Plate Injury.
Jong Chul Ahn
Yeungnam Univ J Med. 1985;2(1):1-4.   Published online December 31, 1985
DOI: https://doi.org/10.12701/yujm.1985.2.1.1
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AbstractAbstract PDF
No abstract available.
A Case of the Solitary Neurofibroma at the Median Nerve.
Joo Chul Ihn, Jong Chul Ahn, Sae Dong Kim, Myun Whan Ahn
Yeungnam Univ J Med. 1984;1(1):199-206.   Published online December 31, 1984
DOI: https://doi.org/10.12701/yujm.1984.1.1.199
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AbstractAbstract PDF
With respect to the histogenesis of the neurofibroma, there are many controversies, since von Recklinghausen postulated that neurofibromas are mainly fibrous tumors arising from the connective tissue of the nerve sheaths. According to the recent studies through the electron microscope, the neoplastic perineurial cells are regarded as the main components of the tumor. So, the neurofibroma enucleated from the median nerve at the level of proximal arm without resulting neurologic sequale was examine through the light-and electron microscope. Ultrastructurally, this tumor is composed of the perineurial cells, fibroblasts, and collagen fibers. The predominant perineurial cells show distinct basal lamina, and contain abundant microfilaments.

JYMS : Journal of Yeungnam Medical Science