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The biomechanical Study on the Extraction Strengths of Iliosacral Lag Screws
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Poong Taek Kim, Chang Wug Oh, Joo Chul Ihn, Jun Dae Kwun
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J Korean Soc Fract 2000;13(4):696-701. Published online October 31, 2000
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DOI: https://doi.org/10.12671/jksf.2000.13.4.696
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 Abstract
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- PURPOSE
The purpose of this study is for the rigid fixation of the pelvic ring by quantifying and comparing the extraction strength of cancellous screws in the sacral ala and body.
MATERIALS AND METHODS
Six cadaveric human pelvis were obtained for test of the extraction strengths of three groups of 7.0mm cannulated cancellous screws: shortthreaded in the sacral ala, short-threaded in the sacral body, long-threaded in the sacral body. The extraction strengths of these groups were compared with each other.
RESULTS
The mean extraction strengths of short-threaded screws in the sacral ala, short-threaded screws in the sacral body and long-threaded screws in the sacral body were 10.26N, 25.85N and 48.37N respectively. The mean extraction strength of the long-threaded screws in the body was significantly greater than that of the shortthreaded screws in the ala and body. The mean extraction strength of the short-threaded screws in the body was greater than that of the short-threaded screws in the ala, but insignificant statistically.
CONCLUSION
In choosing iliosacral lag screws to stabilize the posterior pelvic ring disruption, superior fixation is achieved by inserting the long-threaded screw in the sacral body.
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Citations
Citations to this article as recorded by  - Crescent Fracture-dislocation of Sacroiliac Joint: Affecting Factors of Operative Results
Hee-Soo Kim, Chang-Wug Oh, Poong-Taek Kim, Young-Soo Byun, Joo-Woo Kim, Byung-Chul Park, Woo-Kie Min, Hyun-Joo Lee
Journal of the Korean Fracture Society.2009; 22(2): 71. CrossRef
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Treatment of the Femoral Shaft Fractures Using Reamed Russell-Taylor Intramedullary Nail
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Shin Yoon Kim, Jun Dae Kwun, Hak Su Kim, Byung Gook Kim, Chang Wug Oh, Byung Chul Park, Joo Chul Ihn
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J Korean Soc Fract 1999;12(4):824-832. Published online October 31, 1999
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DOI: https://doi.org/10.12671/jksf.1999.12.4.824
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Abstract
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- The purpose of this paper was to evaluate the results of the femoral shaft fractures by reamed Russell-Taylor intramedullary nailing in the viewpoint of union time and complications. We reviewed 59 femoral shaft fractures. According to the type of fractures(Winquist-Hansen classification), average union time were 20.1 and 23.5 weeks in type 1, 2 and 3, 4, and nonunion rates were 12.5% and 10.5% in type 1, 2 and 3, 4. According to the level of fractures, average union time were 19.9, 20.3, 23.4 weeks in proximal, middle and distal fractures, and nonunion rates were 6.7%, 8.8%, 30% in proximal, middle and distal fractures. According to the reduction techniques, average union time were 20.0 and 21.5 weeks in closed and open reduction, and nonunion rates were 5.9% and 20.O% in closed and open reduction. According to the Methods of interlocking screw fixation, average union time were 19.3 and 20.7 weeks in dynamic and static fixation, and nonunion rates were 25% and 9.8% in dynamic and static fixation. There was no significant differences in averdge union time between closed and open fracture group, closed and open reduction group, and dynamic and static fixation group. There was significant differences in union time between simple and complex, comminuted fractures(P<0.05), and between distal and proximal, middle fractures(P<0.05). Also there was significant differences in nonunion rate between fracture reduced with closed and open technique(P<0.05). In conclusion, reamed Rustell-Taylor intramedullary nailing can be a uheful treatment modality in femoral shaft fracture if closed reduction is available. However, there was high complication rate including failure of screw, varut deformity, delayed union time in distal femoral shaft fractures.
In this situation, we should consider other treatment method.
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