Comparative analysis of modeled femoral fractures osteosynthesis stability

O N Yamshchikov; D A Markov; S A Emelyanov; K P Zvereva; A E Bychkov

doi:10.17816/KMJ1522

Kazan medical journal ›› 2014, Vol. 95 ›› Issue (3) : 392 -394. DOI: 10.17816/KMJ1522

Experimental medicine

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Comparative analysis of modeled femoral fractures osteosynthesis stability

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Abstract

Aim. To perform the comparative analysis of osteosynthesis stability in splintered fractures on the example of modeled fractures of femur with metalwork. Methods. Bone fragments fixation methods using internal fixators, blocking intramedullary nails, external fixation devices. Round wooden rod with external diameter of 35 mm, internal diameter of 25 mm, which was saw in the middle with two cuts directed at an angle of 45° to the rod axis to form the triangle fragment, was picked for femur model for the purpose of experiment. The stability of bone fragments fixation using plates with angle stability, pin- and nail-type external fixation devices and blocking intramedullary nails was assessed. To test the stability of the «bone-fixing device» complex, torsional test machine КМ-50-1 №66, power press П-10 №92, pull test machine Р-10 №1677 were used. Results. Compared to external fixation device, fixation using plates with angle stability was 6 times more stable at axial load and by 43.5% at lateral load. The stability of blocking intramedullary nail at axial load was higher compared to external fixation device. At rotary load, the stability of blocking intramedullary nail was 2 times lower compared to external fixation device. Conclusion. On a model of splintered double-lever femur fractures, fixation using plates with angle stability was the most stable fixation mode.

Keywords

computer modelling / femur / bone model / osteosynthesis / mechanics

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O N Yamshchikov, D A Markov, S A Emelyanov, K P Zvereva, A E Bychkov. Comparative analysis of modeled femoral fractures osteosynthesis stability. Kazan medical journal, 2014, 95(3): 392-394 DOI:10.17816/KMJ1522

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