Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Residual Stresses in Circular Shafts01:10

Residual Stresses in Circular Shafts

642
In materials that exhibit elastic and plastic behavior, known as elastoplastic materials, residual stresses can accumulate when these materials experience plastic deformation. This deformation arises from either high levels of shearing stress or significant strains. Residual stresses are internal stresses that persist within a material after removing the external force causing deformation. This phenomenon is demonstrated when observing the behavior of a shaft under torque; notably, the...
642

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Surface microtexture and hydroxyapatite coating integrity of titanium dental implants following clinically relevant insertion torque.

Journal of prosthodontics : official journal of the American College of Prosthodontists·2026
Same author

Directional PICO framing and unsupported conclusions in prosthodontic systematic reviews: A methodological analysis.

Journal of prosthodontics : official journal of the American College of Prosthodontists·2026
Same author

Assessment of 3D facial scan integration in 3D digital workflows using radiographic markers and the iterative closest point algorithm.

Journal of prosthodontics : official journal of the American College of Prosthodontists·2026
Same author

Effect of different implant abutment materials on optical properties of translucent monolithic zirconia crowns.

Journal of prosthodontics : official journal of the American College of Prosthodontists·2025
Same author

In vitro study to analyze reverse torque values of attachment screws with multiple loosening/tightening preload cycles.

Journal of prosthodontics : official journal of the American College of Prosthodontists·2024
Same author

Effect of hydrofluoric acid concentration and aging on the bond strength ceramics to a resin cement.

Brazilian dental journal·2024

Related Experiment Video

Updated: Apr 21, 2026

Effects of Mechanical Methods Used in Peri-implantitis Treatment on Implant Surface Decontamination and Roughness
06:36

Effects of Mechanical Methods Used in Peri-implantitis Treatment on Implant Surface Decontamination and Roughness

Published on: March 14, 2025

1.1K

Microstructural evolution of cold-worked titanium dental implants following clinically relevant insertion torque.

Mahmoud Elkahly1, Mohamed Elshewy1, Rafael Rocha Pacheco1

  • 1Department of Restorative Sciences, Dental College of Georgia, Augusta University, Augusta, Georgia, USA.

Journal of Prosthodontics : Official Journal of the American College of Prosthodontists
|April 20, 2026
PubMed
Summary
This summary is machine-generated.

High insertion torque can damage titanium dental implants. Torques of 60 Ncm and 80 Ncm caused plastic deformation and microcracks in cold-worked CP Grade 4 titanium implants, affecting their microstructure.

Keywords:
commercially pure titaniumdental implantsinsertion torquemetallographyplastic deformationshear localization

More Related Videos

An Improved Mechanical Testing Method to Assess Bone-implant Anchorage
11:51

An Improved Mechanical Testing Method to Assess Bone-implant Anchorage

Published on: February 10, 2014

16.0K
Oral Biofilm Formation on Different Materials for Dental Implants
11:19

Oral Biofilm Formation on Different Materials for Dental Implants

Published on: June 24, 2018

12.4K

Related Experiment Videos

Last Updated: Apr 21, 2026

Effects of Mechanical Methods Used in Peri-implantitis Treatment on Implant Surface Decontamination and Roughness
06:36

Effects of Mechanical Methods Used in Peri-implantitis Treatment on Implant Surface Decontamination and Roughness

Published on: March 14, 2025

1.1K
An Improved Mechanical Testing Method to Assess Bone-implant Anchorage
11:51

An Improved Mechanical Testing Method to Assess Bone-implant Anchorage

Published on: February 10, 2014

16.0K
Oral Biofilm Formation on Different Materials for Dental Implants
11:19

Oral Biofilm Formation on Different Materials for Dental Implants

Published on: June 24, 2018

12.4K

Area of Science:

  • Biomaterials Science
  • Dental Implantology
  • Materials Engineering

Background:

  • Dental implant stability is crucial for osseointegration.
  • Understanding the mechanical behavior of dental implants under insertion forces is essential.
  • Cold-worked CP Grade 4 titanium is a common material for dental implants.

Purpose of the Study:

  • To evaluate microstructural changes in cold-worked CP Grade 4 titanium dental implants after torsional insertion at varying torque levels (30, 60, and 80 Ncm).
  • To compare the microstructural integrity of implants subjected to different insertion torques against as-manufactured controls.

Main Methods:

  • Dental implants were inserted into polyurethane bone analogs using a guided protocol.
  • Implants were subjected to three torque levels: 30, 60, and 80 Ncm, with controls.
  • Recovered implants were metallographically prepared and examined using light microscopy to assess deformation features.

Main Results:

  • Implants inserted at 30 Ncm showed no significant microstructural changes.
  • At 60 Ncm, intragranular planar deformation features indicative of twinning were observed.
  • At 80 Ncm, pronounced deformation banding and microcrack initiation were evident in stressed regions.

Conclusions:

  • Clinically relevant insertion torques impact the microstructure of CP Grade 4 titanium dental implants.
  • Higher torques (60 and 80 Ncm) induce plastic deformation and potential subsurface damage.
  • Moderate torques are recommended to preserve the implant's as-manufactured microstructure and long-term mechanical integrity.