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Biomechanical Investigation to Establish Stable Fixation Strategies for Distal Tibial Fractures in Various Situations: Finite Element Analysis Studies
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Sung Hun Yang, Jun Young Lee, Gu-Hee Jung, Hyoung Tae Kim, Ba Woo Ko
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J Korean Fract Soc 2024;37(2):71-81. Published online April 30, 2024
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DOI: https://doi.org/10.12671/jkfs.2024.37.2.71
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 Abstract
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- Purpose
This study examined the structural and mechanical stability as well as the clinical significance of various fixation constructs for distal tibial fractures using finite element analysis.
Materials and Methods
Fracture models with 20 mm and 120 mm defects were produced, and implants of an intramedullary nail and anatomical plate model were applied. An axial load of 800 N with 60% distribution in the medial compartment and 40% in the lateral compartment was applied and analyzed using Ansys ® software.
Results
In the intramedullary nail model, the maximum von Mises stress occurred at the primary lag screw hole and adjacent medial cortex, while in the plate model, it occurred at the locking holes around the fracture. The maximum shear stress on the bone and metal implant in the fracture model with a 20 mm defect was highest in the plate assembly model, and in the fracture model with a 120 mm defect, it was highest in the two-lag screw assembly model.
Conclusion
Based on an analysis of the maximum shear stress distribution, securing the fixation strength of the primary lag screw hole is crucial, and the assembly model of the intramedullary nail with two lag screws and a blocking screw applied was the model that best withstood the optimal load. Securing the locking hole directly above the fracture is believed to provide the maximum fixation strength because the maximum pressure in the plate model is concentrated in the proximal locking hole and the surrounding cortex.
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Citations
Citations to this article as recorded by  - How to obtain the desired results from distal tibial nailing based on anatomy, biomechanics, and reduction techniques
Jungtae Ahn, Se-Lin Jeong, Gu-Hee Jung
Journal of Musculoskeletal Trauma.2025; 38(2): 74. CrossRef
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Treatment Results of Reamed Exchange Nailing in Aseptic Nonunion of Tibial Shaft Fracture
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Yongjin Cho, Jun Young Lee, Jehong Ryu, Hyoung Tae Kim, Jong Jin Moon
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J Korean Fract Soc 2023;36(4):125-132. Published online October 31, 2023
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DOI: https://doi.org/10.12671/jkfs.2023.36.4.125
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Abstract
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Intramedullary nailing is used widely for treating tibial diaphysis fractures because of its relatively rigid internal fixation, which allows weight bearing, resulting in rapid bone healing and functional recovery. This study evaluated the results of exchange nailing in treating aseptic nonunion of tibial shaft fractures.
Materials and Methods
From November 2015 to December 2021, a retrospective study was conducted on patients who had undergone intramedullary nailing for tibial diaphysis fractures. Among them, this study focused on patients diagnosed with nonunion and who underwent exchange nailing. Twenty patients with a minimum follow-up period of at least 12 months were included in the study.
Results
The mean ages of patients were 60 years (range, 30-79 years). Of the 20 cases in which exchange nailing was performed, bone union was achieved in 18 cases (90.0%), and the mean period was 23 weeks (range, 14-46 weeks). Among the 18 cases of bone union, one case exhibited delayed union and achieved union without additional treatment after 46 weeks, while two cases of nonunion failed to achieve union and were lost to follow-up until the final assessment.
Conclusion
Reamed exchange nailing performed on aseptic nonunion after intramedullary nailing for tibial diaphysis fractures had satisfactory clinical outcomes.
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Outcomes of Minimally Invasive Surgery in Intra-Articular Calcaneal Fractures: Sanders Type III, Joint Depressive Type Calcaneal Fracture
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Je Hong Ryu, Jun Young Lee, Kang Yeol Ko, Sung Min Jo, Hyoung Tae Kim
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J Korean Fract Soc 2023;36(3):85-94. Published online July 31, 2023
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DOI: https://doi.org/10.12671/jkfs.2023.36.3.85
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Abstract
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To evaluate the radiologic and clinical outcomes of a minimally invasive technique using the tarsal sinus approach in the management of Sanders type III, joint depressive type calcaneal fractures.
Materials and Methods
Between July 2011 and September 2019, data of 29 patients who underwent a minimally invasive procedure with the sinus tarsi approach for Sanders type III joint depressive intra-articular calcaneal fractures, and were followed up for more than 1 year were analyzed. We evaluated the radiologic outcomes by assessing the radiologic parameters (Böhler angle, Gissane angle, calca-neal length, calcaneal height, calcaneal width). We also evaluated the clinical outcomes based on the American Orthopaedic Foot and Ankle Society (AOFAS) ankle-hindfoot score and the complications associated with the technique.
Results
The radiological results showed an improvement in the Böhler angle from 2.5° to 18.6° and the Gissane angle from 132.4° to 119.1° after the operation. The mean AOFAS score during the clini-cal evaluation was 79.5. We observed 13 cases of posttraumatic arthritis, 1 case of subtalar arthrodesis, and no case of wound complication.
Conclusion
Minimally invasive technique for Sanders type III joint depressive calcaneal fractures resulted in relatively satisfactory radiologic and clinical outcomes. Open reduction and internal fixation through the sinus tarsi approach reduce complications including wound problems. This approach offers satisfactory results without long-term complications.
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