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Related Concept Videos

Wedges01:24

Wedges

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A wedge is a simple machine that serves various purposes, such as adjusting the elevation of structural or mechanical parts, providing stability for heavy objects, and splitting a body into two parts. This versatile tool can amplify an applied force, making it easier to manipulate large or heavy objects.
Consider using a wedge to lift a heavy slab. Here, the wedge functions by converting the applied force into a much larger force directed almost perpendicular to the initial force. This...
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Self-Locking Screw01:16

Self-Locking Screw

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A square-threaded screw jack is a mechanical device widely used for lifting heavy loads or applying considerable force. One of the key features that can make a screw jack more effective and reliable is its self-locking capability.
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.
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Machines: Problem Solving I01:22

Machines: Problem Solving I

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A toggle clamp is a mechanical device commonly used for holding and clamping objects in various applications, such as woodworking, metalworking, and assembly operations. Consider a toggle clamp subjected to a force of 200 N at the handle. The vertical clamping force can be calculated, provided the dimensions of the toggle clamp are known.
The toggle clamp system is a machine structure consisting of movable, pin-connected multi-force members that form a stabilized system to transmit forces. The...
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Frictional Forces on Screws01:17

Frictional Forces on Screws

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Screws are characterized by a helical ridge known as a thread wrapped around a cylindrical shaft. They are commonly used as fasteners to hold objects together or to transmit power and motion in machines. One type of screw that is particularly useful for transmitting power is the square-threaded screw.
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...
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Screw: Problem Solving01:21

Screw: Problem Solving

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In mechanical engineering, the interaction between a threaded screw shaft and a plate gear involves analyzing the resisting torque on the plate gear that can be overpowered when a specific torsional moment is applied to the shaft. To better comprehend this concept, consider a generic situation with a threaded screw shaft with a given mean radius and lead and a plate gear with a specified mean radius. The coefficient of static friction between the screw and gear is also provided.
To evaluate the...
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Bearings: Problem Solving01:24

Bearings: Problem Solving

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Understanding the calculations and concepts related to double-collar bearings is essential for engineers and designers to optimize the performance of these components in various applications. By analyzing the bearing under different conditions, one can ensure that it can withstand the forces and moments experienced during operation. This knowledge enables better decision-making when designing and selecting bearings for specific purposes and configurations. Consider a double-collar bearing with...
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Cost-effectiveness of the gluteal turnover flap for perineal wound closure after abdominoperineal resection: randomized clinical trial.

BJS open·2026
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Related Experiment Video

Updated: Mar 26, 2026

Surgical Fixation of Sternal Fractures: Preoperative Planning and a Safe Surgical Technique Using Locked Titanium Plates and Depth Limited Drilling
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Surgical Fixation of Sternal Fractures: Preoperative Planning and a Safe Surgical Technique Using Locked Titanium Plates and Depth Limited Drilling

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Locking Compression Plates are more difficult to remove than conventional non-locking plates.

G D Musters1, P Boele van Hensbroek2, K J Ponsen2

  • 1Academic Medical Centre, Department of Trauma Surgery, University of Amsterdam, G4, Post box 22660, 1105 AZ, Amsterdam, The Netherlands. G.D.Musters@amc.nl.

European Journal of Trauma and Emergency Surgery : Official Publication of the European Trauma Society
|January 28, 2016
PubMed
Summary

Hardware removal of Locking Compression Plates (LCPs) is linked to higher complication rates than conventional plates. Surgeons should carefully consider LCP removal indications and optimize surgical tools for this procedure.

Keywords:
ComplicationsConventional platesHardware removalLCPLocking compression plates

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Area of Science:

  • Orthopedic Surgery
  • Trauma Surgery
  • Biomaterials Engineering

Background:

  • Locking Compression Plates (LCPs) are a recent innovation in orthopedic fixation.
  • Clinicians suspect LCP hardware removal is more complex and complication-prone than with traditional plates.

Purpose of the Study:

  • To compare complication rates between Locking Compression Plate removal and conventional non-locking plate removal.
  • To evaluate the safety and difficulty associated with LCP hardware extraction.

Main Methods:

  • Retrospective analysis of patients undergoing hardware removal between 1993 and 2007.
  • Inclusion of patients from a Level 1 Trauma Centre's Department of Trauma Surgery.
  • Primary outcome: incidence of complications during implant removal.

Main Results:

  • 210 patients were analyzed; females were older than males.
  • LCP removal took significantly longer (median 72 min) than non-locking plate removal (median 54 min).
  • Complication rates were significantly higher for LCP removal (17.7%) compared to non-locking plates (2.5%).

Conclusions:

  • Locking Compression Plate removal is associated with a significantly higher complication rate.
  • Cautious indication for LCP removal is advised.
  • Optimization of surgical instruments for LCP removal is recommended.