Effect of Calcar Screw in Locking Compression Plate System for Osteoporotic Proximal Humerus Fracture: A Finite Element Analysis Study

Table 3

Comparison of maximum stresses applied to each primary component with respect to fracture models and load conditions. LCP: locking compression plate.

Load condition		Fracture model	Max. shear stress on cortical bone (MPa)	Max. von-Mises stress on LCP (MPa)	Max. von-Mises stress on screw (MPa)
Type	Magnitude
Axial force	500 N	A	50.80	20.54	42.78
		B	53.96	20.69	42.47
		C	118.5	411.32	351.84
		D	261.92	1550.30	913.20
Shear force	500 N/20°	A	65.05	101.15	155.08
		B	64.77	109.15	143.04
		C	251.10	788.66	663.40
		D	687.86	2926.80	1277.50