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Fig. 3 | BMC Musculoskeletal Disorders

Fig. 3

From: A finite element analysis and cyclic load experiment on an additional transcortical-type hole formed around the proximal femoral nail system’s distal locking screw

Fig. 3

A Center hole case. The stress around the hole occurs over the tensile strength (135 MPa) from 2500 N, and local damage may occur because the stress is usually concentrated around the hole. Stress distribution (von Mises stress, top layer). B Anterior hole case. Tensile strength (135 MPa) or higher stress occurs from 2000 N of load around the hole. Stress concentration occurs around the anterior additional hole. There is a high possibility of breakage. Stress distribution (von Mises stress, top layer). C Posterior hole case. Tensile strength (135 MPa) or higher stress occurs from the load around the hole from 2000 N. Stress concentration around the posterior additional hole occurs. Similar to the anterior case, there is a high probability of breakage. Stress distribution (von Mises stress, top layer). D Von mises stress. Tensile strength (135 MPa) or higher stress concentration occurs around the additional holes. This suggests a high possibility of damage by compressive load stress distribution (von Mises stress, top layer) at 2750 N

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