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 Experiment Videos

Relationship between insertion torque and removal torque analyzed in fresh temporal bone.

M Ueda1, M Matsuki, M Jacobsson

  • 1Nagoya University School of Medicine, Japan.

The International Journal of Oral & Maxillofacial Implants
|January 1, 1991
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

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

Sort by
Same author

Accurate gamma-ray dose measurement up to 10 MeV by glass dosimeter with a sensitivity control filter for BNCT.

Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine·2024
Same author

Response control of RPLGD for gamma-ray dose measurement using lead filters for BNCT.

Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine·2023
Same author

Adverse reactions associated with long-term drug administration in <i>Mycobacterium avium</i> complex lung disease.

The international journal of tuberculosis and lung disease : the official journal of the International Union against Tuberculosis and Lung Disease·2019
Same author

CT findings in 11 patients with TAFRO syndrome: a variant of multicentric Castleman's disease.

Clinical radiology·2017
Same author

Low bilirubin levels are an independent risk factor for diabetic retinopathy and nephropathy in Japanese patients with type 2 diabetes.

Diabetes & metabolism·2015
Same author

Clinical application of 3D arterial spin-labeled brain perfusion imaging for Alzheimer disease: comparison with brain perfusion SPECT.

AJNR. American journal of neuroradiology·2013

This study measured fixture insertion and removal torque in human bone, finding removal torque consistently lower than insertion torque. Bone thread fracture occurred at higher torque levels, with microfractures observed in histologic samples.

Area of Science:

  • Biomaterials Science
  • Orthopedic Surgery
  • Dental Implantology

Background:

  • Osseointegration is crucial for dental implant success.
  • Understanding bone-fixture biomechanics informs implant design and surgical technique.
  • Quantifying bone-implant interface strength is essential for predicting long-term stability.

Purpose of the Study:

  • To measure insertion and removal torque of dental fixtures in human cadaver and living bone.
  • To determine the torque at which bone threads fracture.
  • To analyze the correlation between insertion and removal torque and identify microfracture patterns.

Main Methods:

  • Human cadaver temporal bone and living bone were used for fixture insertion and removal torque measurements.
  • Torque levels causing bone thread fracture were recorded.

Related Experiment Videos

  • Histologic examination was performed to identify microfractures.

    • Main Results:

    • Maximum insertion torque without thread fracture was 70.0 Ncm (bicortical) and 50.0 Ncm (unicortical).
    • Removal torque was consistently lower than insertion torque across all measurements.
    • Bone thread fracture occurred at mean torques of 77.0 Ncm (bicortical) and 57.7 Ncm (unicortical).
    • Histologic analysis revealed microfractures primarily at thread bases, oriented superiorly.

    Conclusions:

    • Insertion and removal torque provide insights into bone-fixture stability.
    • Higher torque values are required to fracture bone threads compared to removal.
    • Microfracture patterns suggest potential failure mechanisms under excessive torque.