Mechanical evaluation of a new minimally invasive device for stabilization of proximal humeral fractures in elderly patients A cadaver study

Figures & data

Figure 1. Management concept for proximal humeral fractures with an angle-stable skewed arrangement of Kwires.

Table 1. aaa

Humerus no.	Age	Sex	ButtonFix	Humerusblock
1	–	–	L	R
2	75	F	L	R
3	–	F	L	R
4	89	M	R	L
5	76	F	R	L
6	95	M	R	L

Age and sex distribution of the human humeral pairs used for mechanical testing; also, the assignment of implants to the left (L) and right (R) humeri of the humeral pairs. For some of the specimens, age and sex were not documented

Figure 2. Postoperative radiographs showing successful implantation of the ButtonFix (left) and Humerusblock (right).

Figure 3. Compression (a), torsion (b), and bending stiffness (c) of the humeral pairs treated with ButtonFix and Humerusblock implants.

Figure 4. Typical dynamic loading curves over 1,000 cycles for humeri fixed with ButtonFix (specimen A97–114L) and Humerusblock systems (specimen A97–098L).