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Chong Hyuk Choi 3 Articles
Occult Fractures of the Subtalar Joint
Chong Hyuk Choi, Seong Jin Park, DJ Ogilvie Harris
J Korean Soc Fract 2000;13(4):935-940.   Published online October 31, 2000
DOI: https://doi.org/10.12671/jksf.2000.13.4.935
AbstractAbstract PDF
The purpose of the current study was to investigate the results of occult fractures in the subtalar joint which were detected in delay and to find out a way of early detection. The occult osteochondral fractures of the subtalar joint are known to be associated with dislocation and to have a poor prognosis. We treated ten patients who had the occult fractures that were not associated with dislocation. Nine fractures involved posterior facet with a displaced osteochondral fracture. Seven patients lost motion in the subtalar joint completely, and arthrodesis were performed. Three subtalar joints retained some motion and were treated with physiotherapy, which improved the movement and pain. The early detection of fracture was important for the prognosis. We note the "early warning"signs of the patients who have massive swelling without definite bone injury, and who had a failure to regain the subtalar motion after immobilization. The subtalar joint should be imaged with CT or MRI. At first, aggressive physiotherapy should be considered. Arthrodesis should be considered as a final option.
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Stimulation of fracture Healing by Low-Intensity Pulsing Ultrasound
Kyu Hyun Yang, Chong Hyuk Choi, Jae Ho Cho
J Korean Soc Fract 1998;11(2):247-253.   Published online April 30, 1998
DOI: https://doi.org/10.12671/jksf.1998.11.2.247
AbstractAbstract PDF
We performed a preliminary study to evaluate the effect of ultrasound in canine osteotomy model. Both ulna shafts were osteotomized and one side was irradiated with low-energy pulsing ultrasound, 50mW/cm2, 1 MHz, 200 microsecond bursting sine wave for 15 minutes, 6 days a week. Effect on the fracture healing was evaluated by radiologic scoring system, amount of uptake of radioactive isotope, and time to union. Results were as follows : At postoperative 2 months, means of the radiologic healing score were 4.5 in the irradiated side and 2.5 on the control side (p=0.019). Mean isotope uptake in the irradiated side was 44.4 count and 33.8 count in the control side (p=0.028). Two nonunion developed on the control side. Mean time to union of eight dogs was 2.6 months in the irradiated side and 3.1 months on the control side. Based on the cumulative union rate curve, fracture healing was stimulated and union was obtained one month faster in the irradiated side than the control side.

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  • Alterations in Serum Levels of Receptor Activator of Nuclear Factor-κB Ligand and Osteoprotegerin in Patients with Head Injury and Fracture
    Shin Young Park, Kuen Tak Suh, Chang Hoon Ryu, Seung Hun Woo, Jung Sub Lee, Seong-Gang Kim
    Journal of the Korean Fracture Society.2008; 21(2): 145.     CrossRef
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Surgical Treatment of Complex Acetabular Fracture
Dae Yong Han, Chong Hyuk Choi, Yong Jin Yoon
J Korean Soc Fract 1994;7(2):337-344.   Published online November 30, 1994
DOI: https://doi.org/10.12671/jksf.1994.7.2.337
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The principle of operation for Acetabular fracture is, as for any other intraarticular fracture, required anatomical reduction followed by stable internal fixtion. But it is difficult to make good anatomical recuction with firm fixation, because of complicated anatomy and difficulty with surgical exposure. Traumatic arthitis and avascular necrosis of femoral head could be followed by operation. We reviewed 17 cases of complex acetabular fracture treated operatively from January 1984 to December 1991 The prevalent age group was the fourth decade. There were 7 cases of dislocation of the hip, 5 fracture of femur as associated injury. According to the Letournels classification, there were 2 cases of T-shaped fracture, 4 posterior column & posterior wall fracture, 2 anterior column & posterior hemitransverse fracture, 9 both column fracture. Surgical approach was extended iliofemoral method in all cases. The fractuer was fixed internally with only screws in 3 cases and with plate and screws in 14 cases. Treatment results was analyzed by Harriss hip scoring system and Mattas reontgenographic grading system. Among 12 patients who had followed up more than ony year, the satisfactory results were achieved in 76% and the poor results were achieved in 16%. The complications were post traumatic arthritis in 2 cases, avscular necrosis of femoral head 1 cases and skin necrosis 1 case. Anatomical reduction and firm fixation is essential for good result and extended iliofemoral approach is one of the good methods for surgical exposure of complex acetabular fracture.
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