Numerical Optimization of the Position in Femoral Head of Proximal Locking Screws of Proximal Femoral Nail System; Biomechanical Study

KONYA, Mehmet Nuri; VERİM, Özgür

Numerical Optimization of the Position in Femoral Head of Proximal Locking Screws of Proximal Femoral Nail System; Biomechanical Study

Mehmet Nuri KONYA, (Department of Orthopeadics and Traumatology, Afyon Kocatepe University School of Medicine, Afyon, Turkey)

Özgür VERİM (Department of Mechanics, Afyon Kocatepe University School of Engineering, Afyon, Turkey)

Balkan Medical Journal

3 0

Yıl: 2017 Cilt: 34 Sayı: 5 Sayfa Aralığı: 425 - 431 Metin Dili: İngilizce İndeks Tarihi: 29-07-2022

Numerical Optimization of the Position in Femoral Head of Proximal Locking Screws of Proximal Femoral Nail System; Biomechanical Study

Öz:

Background: Proximal femoral fracture rates are increasing due to osteoporosis and traffic accidents. Proximal femoral nails are routinely used in the treatment of these fractures in the proximal femur. Aims: To compare various combinations and to determine the ideal proximal lag screw position in pertrochanteric fractures (Arbeitsgemeinschaft für Osteosynthesefragen classification 31-A1) of the femur by using optimized finite element analysis. Study Design: Biomechanical study. Methods: Computed tomography images of patients’ right femurs were processed with Mimics. Afterwards a solid femur model was created with SolidWorks 2015 and transferred to ANSYS Workbench 16.0 for response surface optimization analysis which was carried out according to anterior-posterior (-10°<anteriorposterior<10°), inferior-superior (-6°<inferiorsuperior<7°) and tip-apex distance (10 mm<tip-apex distance<30 mm) proximal lag screw positions in the fracture region. The optimum position of the proximal lag screw was determined based on the von Mises stress values occurring on the fracture line. Initial analysis of the system was realized under the surgeon’s normal positioning conditions (anterior-posterior, inferiorsuperior=0°; tip-apex distance=12 mm). Results: The maximum and minimum (compression) von Mises stresses were found to be 438 MPa and 0.003 MPa, respectively, and risky stresses for the system occurred in the regions where the proximal lag screw passes through the proximal femoral nail hole, the small diameter portion of stem joints with a large diameter and lag screw mounts to the stem. The most suitable position of the proximal lag screw was found at the middle position of the tip-apex distance (20 mm) and femoral neck (anterior-posterior, inferior-superior=0°), according to von Mises compression stress values occurring on the fracture line. Conclusion: In our study, we couldn’t find any correlation between proximal lag screw movement and tip-apex distance on stresses of the fracture surfaces, but the proximal lag screw position in the inferior (inferiorsuperior<0)-superior (inferior-superior>0) and posterioranterior directions of the femur neck significantly increased these stresses. The most suitable position of the proximal lag screw was confirmed as the middle of the femoral neck by using optimized finite element analysis.

Anahtar Kelime:

Konular: Cerrahi

Belge Türü: Makale Makale Türü: Araştırma Makalesi Erişim Türü: Erişime Açık

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APA	KONYA M, VERİM Ö (2017). Numerical Optimization of the Position in Femoral Head of Proximal Locking Screws of Proximal Femoral Nail System; Biomechanical Study. , 425 - 431.
Chicago	KONYA Mehmet Nuri,VERİM Özgür Numerical Optimization of the Position in Femoral Head of Proximal Locking Screws of Proximal Femoral Nail System; Biomechanical Study. (2017): 425 - 431.
MLA	KONYA Mehmet Nuri,VERİM Özgür Numerical Optimization of the Position in Femoral Head of Proximal Locking Screws of Proximal Femoral Nail System; Biomechanical Study. , 2017, ss.425 - 431.
AMA	KONYA M,VERİM Ö Numerical Optimization of the Position in Femoral Head of Proximal Locking Screws of Proximal Femoral Nail System; Biomechanical Study. . 2017; 425 - 431.
Vancouver	KONYA M,VERİM Ö Numerical Optimization of the Position in Femoral Head of Proximal Locking Screws of Proximal Femoral Nail System; Biomechanical Study. . 2017; 425 - 431.
IEEE	KONYA M,VERİM Ö "Numerical Optimization of the Position in Femoral Head of Proximal Locking Screws of Proximal Femoral Nail System; Biomechanical Study." , ss.425 - 431, 2017.
ISNAD	KONYA, Mehmet Nuri - VERİM, Özgür. "Numerical Optimization of the Position in Femoral Head of Proximal Locking Screws of Proximal Femoral Nail System; Biomechanical Study". (2017), 425-431.

APA	KONYA M, VERİM Ö (2017). Numerical Optimization of the Position in Femoral Head of Proximal Locking Screws of Proximal Femoral Nail System; Biomechanical Study. Balkan Medical Journal, 34(5), 425 - 431.
Chicago	KONYA Mehmet Nuri,VERİM Özgür Numerical Optimization of the Position in Femoral Head of Proximal Locking Screws of Proximal Femoral Nail System; Biomechanical Study. Balkan Medical Journal 34, no.5 (2017): 425 - 431.
MLA	KONYA Mehmet Nuri,VERİM Özgür Numerical Optimization of the Position in Femoral Head of Proximal Locking Screws of Proximal Femoral Nail System; Biomechanical Study. Balkan Medical Journal, vol.34, no.5, 2017, ss.425 - 431.
AMA	KONYA M,VERİM Ö Numerical Optimization of the Position in Femoral Head of Proximal Locking Screws of Proximal Femoral Nail System; Biomechanical Study. Balkan Medical Journal. 2017; 34(5): 425 - 431.
Vancouver	KONYA M,VERİM Ö Numerical Optimization of the Position in Femoral Head of Proximal Locking Screws of Proximal Femoral Nail System; Biomechanical Study. Balkan Medical Journal. 2017; 34(5): 425 - 431.
IEEE	KONYA M,VERİM Ö "Numerical Optimization of the Position in Femoral Head of Proximal Locking Screws of Proximal Femoral Nail System; Biomechanical Study." Balkan Medical Journal, 34, ss.425 - 431, 2017.
ISNAD	KONYA, Mehmet Nuri - VERİM, Özgür. "Numerical Optimization of the Position in Femoral Head of Proximal Locking Screws of Proximal Femoral Nail System; Biomechanical Study". Balkan Medical Journal 34/5 (2017), 425-431.