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Related Experiment Videos

Modelling dental implant extraction by pullout and torque procedures.

D Rittel1, A Dorogoy1, K Shemtov-Yona1

  • 1Faculty of Mechanical Engineering Technion, 32000 Haifa, Israel.

Journal of the Mechanical Behavior of Biomedical Materials
|April 18, 2017
PubMed
Summary

Dental implant extraction forces and torques reveal bone strength. Full osseointegration significantly increases extraction load but not extraction work, suggesting average extraction work better characterizes bone-implant strength.

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Area of Science:

  • Biomechanics
  • Biomaterials Engineering
  • Dental Implantology

Background:

  • Assessing bone-implant interfacial strength is crucial for dental implant success.
  • Current literature lacks detailed mechanical and physical descriptions of implant extraction.
  • Estimating interfacial strength often relies on torque or pullout force during extraction.

Purpose of the Study:

  • To simulate dental implant extraction from mandible bone using 3D nonlinear dynamic finite element analysis.
  • To investigate load-displacement and torque-angle relationships under varying bone strengths and osseointegration levels.
  • To identify optimal metrics for characterizing bone-implant interfacial strength.

Main Methods:

  • Developed 3D nonlinear dynamic finite element models of implant extraction.
Keywords:
Dental implantExtractionLoadNumerical modellingTorque

Related Experiment Videos

  • Simulated extraction from mandible bone with diverse cortical and trabecular bone strengths.
  • Modeled varying osseointegration levels, from initial frictional contact to full bonding.
  • Analyzed load-displacement and torque-angle responses.

    • Main Results:

    • Peak extraction force correlates with trabecular bone strength; peak torque correlates with cortical bone strength.
    • Full osseointegration can increase peak and average extraction loads by 3-12 times.
    • Extraction work increased by only 1.5 times with full osseointegration, indicating a more stable measure.
    • Damage evolution and bone component strength contrasts are discernible from simulated relationships.

    Conclusions:

    • Extraction mechanics provide insights into bone quality and osseointegration.
    • Average extraction work is a more robust indicator of bone-implant interfacial strength than peak load or torque.
    • Finite element simulations offer a valuable tool for understanding dental implant biomechanics.