Internal fixation of femoral neck fractures with posterior comminution

Abstract

In comminuted Pauwels type III fractures, the fixation with the IT provided sufficient postoperative mechanical strength, comparable rate of femoral head displacement, and a similar tolerance of physiological loads compared to fractures without comminution. The absence of the posteromedial support in comminuted fractures tended to reduce the failure load regardless of the fixation method.

Locked minimally invasive plating versus fourth generation nailing in the treatment of AO/OTA 31A2.2 fractures: A biomechanical comparison of PCCP® and Intertan nail®

“…Depending on the size of the medial fragment, tensile forces of varying degree occur at the lateral wall resulting in varus displacement [9,33]. With increasing eccentric loading, higher bending forces occur proximally with subsequent fracture of the greater trochanter [33] or proximal medialisation and axial subsidence of the nail [7,24]. This bears the risk of implant breakage at the nail-lag screw interface (one in our study), which has also been described by Rupprecht et al [36].…”

“…2). Decreasing stiffness during cyclic testing following fixation with the IT has been reported before [7,24].…”

“…any differences in the rate of mechanical complications after extramedullary versus intramedullary implantation [1], biomechanical studies found higher failure loads for the intramedullary load carriers [7][8][9], with a more rigid fixation under axial load application in stable as well as unstable fracture models [8]. However, there appear to be certain exceptions for the use of intramedullary load carriers [9,10].…”

Do PFNA devices and Intertan nails both have the same effects in the treatment of trochanteric fractures? A prospective clinical study

“…Cadaver studies have shown that Intertan nails can be used successfully to treat unstable collum femoris fractures, given their strong stabilization and compression features compared with DHSs and cannulated screws [23,24]. Compression is essential in collum femoris fractures, and a strong compression ability is a desirable characteristic of implants.…”

What is the risk of stress risers for interprosthetic fractures of the femur? A biomechanical analysis

“…The femurs were randomized on the basis of pQCT-data. The specimens were pair-matched by bone density in the same way as in prior biomechanical studies [7,[12][13][14].…”