Table 2.

Von Mises stress mean on the implant surface of artificial 3D finite element model (MPa).

	60°osteonecrosis	90°osteonecrosis	120°osteonecrosis
Tantalum rod implant inside of the osteonecrosis area	0.336	0.471	0.532
Tantalum rod implant in the middle of the osteonecrosis area	0.390	0.509	0.684
Tantalum rod implant outside of the osteonecrosis area	0.372	0.457	0.634
Tantalum rod shortening 5-mm implant	0.509	0.527	0.706
Fibula implant	0.372	0.517	0.741