Journal of Musculoskeletal Trauma

Old Atlantoaxial Rotary Subluxation Associated with High-riding Vertebral Arteries: Arthrodesis Using C1 Lateral Mass Screws and C2 Laminar Screws: A Case Report: Kyeong Hwan Kim, Jin Sup Yeom, Kun Woo Park, Soon Woo Hong, Bong Soon Chang, Choon Ki Lee; J Korean Fract Soc 2007;20(1):90-93. Published online January 31, 2007; DOI: https://doi.org/10.12671/jkfs.2007.20.1.90

To the best of our knowledge, there has been no domestic report on posterior atlantoaxial fusion with segmental screw fixation using C2 laminar screws and C1 lateral mass screws for atlantoaxial subluxation. We report the result of this operation performed in a patient with old atlantoaxial rotary subluxation who required posterior fusion. We chose this technique in this patient because wire fixation was not suitable due to osteoporosis, and transarticular screw fixation and use of C2 pedicle screws were not feasible due to the peculiar bony anatomy of the axis.

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Indirect Decompression using Segmental Screw Fixation for Cervical Myelopathy Caused by C1-2 Subluxation - Technical Note -
Yoon Jong Kim, Kyeong Hwan Kim, Jong Hwa Won, Hak Jin Min, Ui Seong Yoon, Jin Sup Yeom
The Journal of the Korean Orthopaedic Association.2007; 42(6): 815. CrossRef

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Comparison of Uniportal and Biportal Vertebroplasty in Bone Cement Distribution and Leakage: Jae Hyup Lee, Kang Sup Yoon, Seung Baik Kang, Hyunchul Jo, Sang Ki Lee, Bong Soon Chang, Choon Ki Lee, Ji Ho Lee; J Korean Fract Soc 2006;19(4):471-476. Published online October 31, 2006; DOI: https://doi.org/10.12671/jkfs.2006.19.4.471

Abstract: PURPOSE
To evaluate the differences of radiological outcomes of uniportal and biportal vertebroplasty in the point of bone cement distribution and leakage.
MATERIALS AND METHODS
A retrospective study reviewing the period between May 2002 and January 2006 investigated 100 vertebrae which underwent vertebroplasty and followed for more than three months by uniportal approach (55 vertebrae, group 1) and biportal approach (45 vertebrae, group 2). The operative time, the amount of bone cement injected, anterior vertebral height restoration, kyphotic angle, bone cement distribution, and bone cement leakage were evaluated.
RESULTS
The amount of injected bone cement of group 1 (3.9 cc) was statistically smaller than that of group 2 (5.1 cc) (p=0.016). There were no significant differences in the operative time, anterior vertebral height restoration, kyphotic angle in both groups. The rate of bone cement distribution over 8 zones was significantly higher in group 2 than in group 1 (p=0.014). However, the rate of bone cement distribution over 7 zones and the rate of bone cement distributed on whole anterior vertebral body were not significantly different in both groups. The cement leakage was not also significantly different in both groups.
CONCLUSION
Although the amount of injected bone cement was smaller in uniportal vertebroplasty, the radiological results and cement leakage were similar to biportal vertebroplasty. These findings suggest that uniportal vertebroplasty can be the operative options in osteoporotic vertebral fracture.

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Evaluation of Osseointegration in Titanium Alloy Cortical Screws with the Passage of Time: Jae Hyup Lee, Bong Soon Chang, Choon Ki Lee; J Korean Fract Soc 2004;17(4):401-407. Published online October 31, 2004; DOI: https://doi.org/10.12671/jkfs.2004.17.4.401

Abstract PDF: PURPOSE
To evaluate the osseointegration of titanium alloy cortical screws with the passage of time.
MATERIALS AND METHODS
Fifty four titanium alloy cortical screws (24 mm in length, 3.5 mm in diameter) were implanted bilaterally in the tibial diaphysis of adult mongrel male dogs of similar size and weight (30 +/-5 kg). The insertion torques, radiographs, undecalcified histology, histomorphometric analysis and extraction torques were evaluated at 2, 4 and 8 weeks after surgery.
RESULTS
The extraction torque at 2 weeks (1.14+/-0.470 cN. m) was significantly lower than the insertion torque (1.76+/-0.609 cN. m) (p=0.0071), the extraction torque at 4 weeks (2.57+/-1.36 cN. m) was slightly improved and the extraction torque at 8 weeks (3.18+/-0.499 cN. m) was significantly higher than insertion torque (p=0.0005). Direct bony contact in the early phase was poor and intervening fibrous tissue was observed at the bone-screw interface. However, the fixation between the bone and the screws improved with time. The percentage of bone-screw contact at 8 weeks (33.1+/-18.5%) was higher than that of 2 weeks (22.4+/-12.9%), but not statistically significant.
CONCLUSION
Because of thermal injury or pressure necrosis, the fixation strength of titanium alloy cortical screws at 2 weeks after implantation is significantly lower than that at the insertion time. So, we should keep in mind the initial phase weakness of screw fixation when we allow the patients the range of motion exercise or weight bearing and the improvement of the initial phase fixation is very important in clinical results.

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Results of cross pinning fixation for supracondylar fracture of the humerus in children: considering adequate reduction and instability: Jong Hun Jee, Bong Soon Chang, Seung Baik Kang, Choong Hee Won, Eui Seong Choi; J Korean Soc Fract 1998;11(4):985-993. Published online October 31, 1998; DOI: https://doi.org/10.12671/jksf.1998.11.4.985

Abstract PDF: The supracondylar fracture of the humerus is the most common fracture of the elbow in children. New trends of treatment is that if satisfactory reduction is achieved by manual reduction, medial and lateral cross percutaneous pin fixation is better than others for stable fixation. Among many complications, cubitus varus deformity most commonly results from inaccurate reduction and failure in maintenance of fixation. The obliquity of the fracture, together with internal rotation, causes angular deformity. The angulation and coronal rotation, or tilting of distal fragment, often cause the deformity and limitation of motion of elbow. The porty-two Gartland type II, III supracondylar fractures of the humerus were treated by losed reduction or open reduction with percutaneous pinning or internal fixation from May 1993 to December 1995. The results were as follows; 1. the frequency of difference above 5degree in Baumann's angle was relatively high if fracture line is oblique on lateral roentgenogram or medial column comminution is present, that means unstable reduction. 2. In average, 2.7 pins were needed for reduction and maintenance of stability at this time. 3. Even though a few degree of rotation(5mm), translation(2-4mm) and angulation(5-10degree) were present at immediate reduction, carrying angle and Baumann's angle of follow-up period were often remained about the similar values compared with healthy side. If acceptable intraoperative carrying angle was achieved and a few degree of rotation, translation and angulation were permitted after reduction, varus deformity and limitation of motion of elbow were rerely caused. so repeating forceful manual reduction for anatomical reduction must be avoided because the final results may become progressively remodelled to normal.

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Clinical Result of Surgical Treatment in Distal Femur Fractures using Dynamic Compression Screw and Blade Plate: Seung Baik Kang, Joong Hee Won, Bong Soon Chang, Eui Seong Choi, Jin Seon Yoo, Hee Joong Kim; J Korean Soc Fract 1996;9(3):557-566. Published online July 31, 1996; DOI: https://doi.org/10.12671/jksf.1996.9.3.557

Abstract PDF: The fracture of distal femur, which include the supracondylar region, intercondylar region and knee joint, have many problems by nature. It is almost all comminuted fracture and has a some difficulty in approach. Early attempts at internal fixation frequently gave unacceptably high rates of malunion, nonunion, and infection. Traditionally, nonsurgical treatment has been favored. Over the past 15 years, improved and meticulous techniques of internal fixation has been shown to yield good to excellent results. Also a number of excellent devices are now available. We reviewed the patients who were admitted for fractures of the distal femur and were treated by the surgical treatments at department of Orthopaedic Surgery, Chungbuk National University Hospital from July 1993 through Augrst 1994. Fourteen cases were followed for more than one year. An average age at operation was 54 years (range, 18-74 years). The analysis group consisted of 9 males and 5 females. The cause of injuries were motor cycle injury in 8 cases, in-car accident in 2 cases, pedestrian injury in 2 cases and fall down in 2 cases. According to the classifications of AO, 4 cases were type Al, 2 were type A2, 2 were type A3, Cl was 1 case, C2 were 2 cases and C3 were 3 cases. Open fractures were 2 cases. Blade plate was used in 10 cases and DCS(dynamic compression screw) in 4 cases. With serial follow-up X-ray, ROM of knee and Neers scoring system, evaluation was performed. Excellent or good results were obtained in 13 cases (93%). Deep infection was developed in one case. At last follow-up, ROM was satisfactory. Blad plate was very useful for severe osteoporotic patient. For comminuted, displaced intra-articular fractures such as Type C, extensile surgical approach was most useful.

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