jackscrew


Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.

jack·screw

(jak'skrū),
A threaded device used in appliances for the separation of approximated teeth or jaws.

jack·screw

(jak'skrū)
A threaded device used in appliances for the separation of approximated teeth or jaws.

jackscrew

A dental device used to pull together or push apart teeth or jaw fragments.

jack·screw

(jak'skrū)
Threaded device used in dental appliances for separation of approximated teeth or jaws.
References in periodicals archive ?
Although the method resulted in the increase in the dental archwire perimeter, correcting crossbite with minimal side effects, after 10 days of activation, resistance to activate the jackscrew was once again observed.
Later models also have a square inspection cover at the bottom of the fuselage that allows better inspection and lubrication of the critical elevator trim jackscrew. This also should be installed for more complete, safer inspections.
In the field of robotics and industrial automation, repeated mating and disengaging operations can lead to latches wearing out and so jackscrews are increasingly being specified as a more reliable alternative.
To counter this potential bending, use an indicator on the top face of the part when installing the jackscrew.
On a four-high mill, one whose stands each have four rolls one above the other, the bearings that support the backup rolls that support the work rolls are mounted on jackscrews whose axes are vertical.
The investigation reportedly showed that the two-foot "jackscrew" had not been greased properly, leading to damage from wear and eventually to failure.
Baikal's gunmakers have gotten around the troublesome (and expensive) process of regulating the barrels by installing a jackscrew that the customer can use to adjust one barrel's point of aim to the other, fixed barrel.
The tray is then slid into place, and two arms on a jackscrew lift the patient into position.
Investigators quickly focused on a lack of grease on the jackscrew, a tail component that helps move the jet's stabilizer and sets the angle of flight.
Investigators believe the crash was caused by the failure of the "jackscrew" assembly in the MD-80's tail, which controls whether the plane's nose is pointed up or down.
"Flight 261 shouldn't have gone out if there was any question about the jackscrew," asserts Wagstaff, referring to the plane part widely reported as causing the crash.