K2M's MESA Platform Technology features top-loading and low-profile screws and Zero-Torque Technology that one-step locks without applying torsional stress
to the spine.
Because of the rising torsional stress
with rising thread coefficient of friction, the axial breaking force of the screw is reduced, which also means a reduced critical length of thread engagement.
During cyclic torsional shear testing, cyclic torsional stress
amplitude is increased with each prescribed number of cycles to obtain the strain-dependent shear modulus and damping values.
When the bar was twisted to the predetermined angle, the clamp was suddenly released, and then, the torsional stress
wave was instantly generated.
In present study, constant torsional stress
was applied repetitively to simulate repeated locking or autoreverse motion of the rotary file during canal preparation.
Cerit, <<Numerical investigation on torsional stress
concentration factor at the semi elliptical corrosion pit,>> Corrosion Science, pp.
The spheroidal graphite distribution wholly or partially on matrix depends on type of component application like axial stress, bending stress, reverse bending stress or torsional stress
determines the life of component.
Berzins, "An in vitro comparison of torsional stress
properties of three different rotary nickel-titanium files with a similar cross-sectional design," Journal of Endodontics, vol.
Unless very well damped, this "interference" with a natural frequency can lead to high torsional vibration, high cyclic torsional stress
and fatigue failure.
The pretensioner applies an always reproducible, defined tensile load to the screw shafts, but no longer any torsional stress
. It is said to be easy to operate.
The new pre-tensioner applies a reproducible, defined tensile load to the screw shafts, but no torsional stress
. The device is said to be easy to operate: The operator selects the correct pressure from the machine documentation and clamps the screw outside the extruder in the pre-tensioning device.
In so doing, the torsional stress
was probably exponentially greater.