Factors affecting accurate drill sleeve insertion in locking compression plates
1Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan, Seoul, Republic of Korea.
Background:
Accurate positioning of locking screws depends on accurate insertion of the drill sleeve into the locking compression plate (LCP). The purpose of the present study was to determine factors affecting accurate drill sleeve insertion.
Hypothesis:
Tilting and shallow locking screw holes and combination-type holes make it difficult to insert the drill sleeve in the LCP.
Materials And Methods:
Twenty-seven 3.5mm LCP metaphyseal insertion holes were selected (Philos(®), LPHP(®), DMTP(®), low-band DMTP(®) [Synthes, Solothurn, Switzerland]). Two orthopedic surgeons checked the time taken for accurate insertion of the drill sleeve into the plate. Variables relating to LCP drill sleeve insertion time were analyzed.
Results:
It took an average 6.6seconds to insert the drill sleeve accurately in the holes. Insertion time increased with the tilt of the screw hole but not with shallowness. Insertion time in combination-type holes was longer (8.8seconds) than in single locking holes (5.6seconds).
Discussion:
Tilted screw holes and combination-type holes affect the insertion of the drill sleeve into 3.5mm LCPs.
Level Of Evidence:
Level IV, experimental study.
Related Concept Videos
Frictional Forces on Screws
A jack with a square-threaded screw is a mechanical device used to lift heavy loads by applying a force at its handle. When the force is applied, the screw turns, raising the load. The screw can...
Screw: Problem Solving
To evaluate the...
Self-Locking Screw
A square-threaded screw jack carrying a load is considered self-locking if the screw retains its position even after the moment applied to it is removed.
Stress Concentrations in Circular Shafts
Collar Bearings
Bearings: Problem Solving

