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Related Concept Videos

Torque01:10

Torque

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Torque is an important quantity for describing the dynamics of a rotating rigid body. We see the application of torque in many ways in the world, such as when pressing the accelerator in a car, which causes the engine to apply additional torque on the drivetrain. Here, we define torque and provide a framework to create an equation to calculate torque for a rigid body with fixed-axis rotation.
Torque can be considered as the rotational counterpart to force. Since forces change the translational...
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Numerical Calculations01:24

Numerical Calculations

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In engineering applications, the representation of the numerical value is critical. Presenting or reporting the answer is one of the essential parts of engineering practices. Numerical calculations are performed using handheld calculators or computers since numerically accurate answers are always preferred.
The solution to a problem is obtained using different methods. While manually solving algebraic symbols is one of the most common methods, the graphical method is often preferred. Computers...
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Torque Free Motion01:15

Torque Free Motion

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The torque-free motion refers to the movement of a rigid body in space when no external torques are acting upon it. This type of motion can be observed in environments where there are no external forces or frictions, like in outer space. For example, a rotation of Mars in space is a torque-free motion. Mars is an axisymmetric object, meaning it has an axis of symmetry along which it rotates, designated as the z-axis. The rotating frame of reference is defined such that the center of mass of...
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Net Torque Calculations01:19

Net Torque Calculations

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When a mechanic tries to remove a hex nut with a wrench, it is easier if the force is applied at the farthest end of the wrench handle. The lever arm is the distance from the pivot point (the hex nut in this case) to the person’s hand. If this distance is large, the torque is higher. Only the component of the force perpendicular to the lever arm contributes to the torque. Therefore, pushing the wrench perpendicular to the lever arm is more advantageous. If multiple people apply force to...
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Area Computation by the Alternative Coordinate Method01:24

Area Computation by the Alternative Coordinate Method

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The alternative coordinate method, also known as the Shoelace Formula, is a technique for determining the area of a traverse using Cartesian coordinates. This method relies on the sequential arrangement of x and y coordinates for each point of the shape, ensuring accuracy and ease of application.In this approach, each corner's x and y coordinates are listed as fractions, with the x-coordinate as the numerator and the y-coordinate as the denominator. These coordinates are arranged sequentially...
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Pilot and Numeric Relaying01:21

Pilot and Numeric Relaying

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Pilot relaying is a type of differential protection used in power systems. It compares electrical quantities at the terminals of equipment via a communication channel instead of direct relay interconnection. This method is essential for transmission lines where the terminals are far apart, typically up to 80 km for lines with 69 to 115 kV ratings. Four types of communication channels are used for pilot relaying:
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Related Experiment Video

Updated: Jan 23, 2026

Dynamic Navigation for Dental Implant Placement
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Dynamic Navigation for Dental Implant Placement

Published on: September 13, 2022

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Microstructure-based numerical computational method for the insertion torque of dental implant.

Luli Li1, Song Zhang1, Quhao Li1

  • 1School of Mechanical Engineering, Shandong University, Jinan, 250061, PR China; Key Laboratory of High-efficiency and Clean Mechanical Manufacture (Shandong University), Ministry of Education, PR China.

Journal of the Mechanical Behavior of Biomedical Materials
|June 24, 2019
PubMed
Summary

This study introduces a novel microstructure-based computational method to predict dental implant insertion torque, improving accuracy and efficiency by considering trabecular microstructure beyond just bone density.

Keywords:
Dental implantFabric tensorInsertion torqueMicrostructural solid modelVolume fraction

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Area of Science:

  • Biomaterials Science
  • Computational Mechanics
  • Dental Implantology

Background:

  • Bone quality significantly impacts dental implant insertion torque.
  • Current methods primarily rely on bone density, neglecting trabecular microstructure.
  • Trabecular microstructure's influence on insertion torque remains under-explored.

Purpose of the Study:

  • To propose an accurate and efficient microstructure-based numerical method for predicting dental implant insertion torque.
  • To investigate the role of microscopic variables like volume fraction and fabric tensor.
  • To compare the proposed method against traditional isotropic and micro-CT finite element models.

Main Methods:

  • Developed 3D microstructural solid models based on trabecular topology.
  • Utilized homogenous theory to derive microscopic material models.
  • Created anisotropic material models using a mixture rule.
  • Performed finite element analysis (FEA) using anisotropic, isotropic, and micro-CT models.

Main Results:

  • The anisotropic FE model accurately predicted insertion torque compared to experimental data.
  • The proposed method demonstrated significant improvements in efficiency and accuracy.
  • Anisotropic FE model reduced computation time by 91.85% and increased accuracy by 11.82% over micro-CT and isotropic models.

Conclusions:

  • Microstructure-based numerical simulation is a feasible and potent method for predicting dental implant insertion torque.
  • Incorporating trabecular microstructure variables enhances prediction accuracy and computational efficiency.
  • This approach offers a promising alternative to conventional methods in dental implantology.