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Bridging external fixation and supplementary Kirschner-wire fixation versus volar locked plating for unstable fractures of the distal radius: a randomised, prospective trial.
A total of 97 adult patients completed the study, including 52 with stable fractures and 45 with unstable fractures, Dr.
For these polymers, the initiation of unstable fracture can be accurately described by either [K.
After incubation, a crack will initiate from this flaw and propagate radially in a slow, stable manner either until the wall thickness is traversed (a leak before break' scenario) or a critical crack size for unstable fracture is attained.
Friese and coworkers (43) performed a retrospective review of 96 patients with pelvic fracture and risk factors for hemorrhage (systolic blood pressure less than 100 mmHg or an unstable fracture pattern) who underwent a FAST and either operative exploration or CT scan for confirmation.
This phenomenon is clear evidence of excessive strain energy being dissipated during unstable fracture, suggesting that the crack propagates from a region of high local toughness at the crack tip to one of low toughness in the rest of the specimen.
For those blends whose ligaments are not fully yielded, that is, blends with 25 phr elastomer at 20[degrees]C and 20 phr elastomer at 40[degrees]C, their fracture behavior is ductile tearing with plastic flow confined to a small circular region ahead of the notch tip, followed by fast unstable fracture with a finite yield strip on either surface.
Not uncommonly, debate will arise in the early management of the multiply-injured patient with an unstable fracture pattern regarding the proper sequence of events.
Ching et aL (12) further observed that for polyethylene terephthalate glycol (PETG) film, the DENT specimens changed from ductile stable to brittle unstable fracture on increasing the specimen gauge length.
At the brittle-ductile transition, the fracture process changed from being a fast unstable fracture with craze formation to a slow stable fracture showing ductile tearing.