Journal of Musculoskeletal Trauma

Development and Accuracy Test of a Robot-arm Type Image-guided Surgery System for Percutaneous Screw Fixation of the Sacro-iliac Joint: Jin Sup Yeom, Won Sik Choy, Hayong Kim, Jong Won Kang, Kwang Won Lee, Whoan Jeang Kim, Jae Hoon Ahn, Seong Kyu Park, Jong Hwa Won, Hyungmin Kim, Namkug Kim; J Korean Fract Soc 2005;18(2):191-197. Published online April 30, 2005; DOI: https://doi.org/10.12671/jkfs.2005.18.2.191

Abstract PDF: PURPOSE
To develop a robot-arm type image-guided surgery system for percuatneous screw fixation of the sacro-iliac joint and to evaluate its accuracy.
MATERIALS AND METHODS
We have developed an image-guided surgery system using a three-dimensional digitizer (Microscribe 3-D G2, Immersion, USA) and a personal computer. The registration error and target localization error at fiducial registration were measured 30 times for each using a phantom made with plastic pelvic bone model (Sawbones, USA). Sixteen 6.5 mm cannulated screws were inserted into four plastic bone models, and the accuracy was evaluated.
RESULTS
The target localization error was 1.46+/-0.47 mm while the registration error was 0.73+/-0.23 mm. All of the 16 screws were inserted well across the sacro-iliac joint, and there was neither cortical breach nor collision between screws or washers.
CONCLUSION
The accuracy of the developed system was similar to that of optical tracker-based navigation systems, and its helpfulness and usefulness was proven with simulation surgery using plastic bone models.

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Musculo-skeletal trauma of the children: Ha Yong Kim, Kun Young Park, Kwang Won Lee, Jae Hoon Ahn, Jin Sup Yeom, Won Sik Choy; J Korean Soc Fract 2001;14(1):128-134. Published online January 31, 2001; DOI: https://doi.org/10.12671/jksf.2001.14.1.128

PURPOSE
The aim of study was to analyze the patterns of musculo-skeletal trauma of the children.
MATERIALS AND METHODS
From 1997 to 1999, the included for the study were 108 children, who had been admitted for the orthopedic treatment and followed-up. The analysis were done as for 1) children s biological characteristics, 2) the situations of trauma, 3) causes of trauma, 4) types of trauma and 5) locations of fractures.
RESULTS
The average age was 8.5 years at the time of trauma. Sixty cases (56%) were between 5 and 9 years old. Boys were 3 times more common than girls. Second children (61cases, 57%) were more prone to trauma. Half of trauma took place between July and October, and one third of trauma (36 cases, 33%) happened on the street. Ninety eight children (91%) were admitted due to fracture, and supracondyle fracture of humerus was the most common cause(48 cases).
CONCLUSION
Many of accidents could be attributed to children's mischievous play resulted from curiosity and freedom of thought. For the prevention of these accidents, therefore, environment should be restructured from the point of child's view, and not only the design of facility itself but also proper management and education on the facilities should be taken.

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The Pattern of Occurrence of Fractures in Children and Adolescents and Its Managements Based on the Database of the Health Insurance Review and Assessment Service
Yong-Wook Kwon, Soon-Hyuck Lee, Hyun-Woo Kim, Jin-Ho Hwang
Journal of the Korean Fracture Society.2014; 27(4): 308. CrossRef

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Factors Affecting the Functional Result of Monteggia Fractures in Adults: Yong Bum Park, Byeong Ki Lee, Kwang Won Lee, Whoan Jeang Kim, Ha Yong Kim, Jae Hoon Ahn, Won Sik Choy; J Korean Soc Fract 2000;13(3):597-604. Published online July 31, 2000; DOI: https://doi.org/10.12671/jksf.2000.13.3.597

Abstract PDF

PURPOSE
Monteggia fracture is a combination of ulnar fracture and radial head dislocation. Despite of low incidence, Monteggia fracture has a problem in the treatment. So satisfactory results could not be achieved easily. The purpose of this study was to analyze factors affecting functional results in Monteggia fracture.
MATERIALS AND METHODS
From January 1990 to June 1998, we retrospectively reviewed 24 patients out of 40 patients who had been treated for Monteggia fracture. The functional assessment was performed with Broberg and Morrey system10).
RESULTS
Excellent and good results were achieved in 16 cases(66.6%), whereas fair and poor results in 8 cases(33.4%). Satisfactory results were obtained in 66.6% overall. According to the Bado classification, functional results were not different significantly between types. According to the mechanisms of injury, unsatisfactory results were obtained in 8 of 17 patients with high energy injury. Monteggia fractures with ulnar fracture at the diaphyseal level showed satisfactory results significantly compared to others. In terms of the methods of internal fixation, the plate and screw fixation showed satisfactory results in 14 of 16 patients whereas tension band wiring or intramedullary nailing showed unsatisfactory results in 6 of 8 patients.
CONCLUSION
In Monteggia fractures, factors affecting functional result may be the mechanism of injury, the level of ulnar fracture and the method of internal fixation.

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Incomplete Anterior Interosseous Nerve Palsy That Accompanied a Monteggia Fracture
Bo-Kyu Yang, Seong-Wan Kim, Seung-Rim Yi, Young-Jun Ahn, Jung-Ho Noh, Young-Hak Roh, Seung-Won Lee, Min-Soo Je, Seok-Jin Kim
Journal of the Korean Orthopaedic Association.2011; 46(1): 78. CrossRef

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Treatment of Humeral Shaft Nonunion after Primary Internal Fixat: Kwang Won Lee, Kyou Hyeun Kim, Whoan Jeang Kim, Ha Yong Kim, Jae Hoon Ahn, Yong Bum Park, Won Sik Choy; J Korean Soc Fract 1999;12(3):704-711. Published online July 31, 1999; DOI: https://doi.org/10.12671/jksf.1999.12.3.704

Abstract PDF: We retrospectively reviewed one hundred fifty-two patients who were treated for humeral shaft fractures at Eul-Ji Medical College hospital from Jan 1991 to June 1997. We experienced twenty one cases of nonunion among them after primary internal fixation. The purpose of this study was to evaluate possible causes of nonunion and to find out adequate treatments. The main cause of nonunion was an inadequate fixation (57%). The most common fracture pattern was simple transverse type(22%), and it occurred most frequently at the middle one third area of humeral shaft(22%). For the treatment of nonunion, the plate fixation was done in ten cases, interlocking intramedullary nailing in three cases, bone graft only in six cases, and external fixation using monofixator(Orthofix) in two cases. We obtained complete bony union from all cases, and the average union time was 17.5 weeks. Our study showed that higher incidence of nonunion was found in primary intramedullary nailing cases(19%) than in primary plate fixation cases(4%). In conclusion, close attention should be paid when choose the primary fixation method, and plate fixation and bone graft was considered as one of the useful treatment method of nonunion.

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