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Related Experiment Video

Updated: Jun 28, 2026

Measuring Maxillary Posterior Tooth Movement: A Model Assessment using Palatal and Dental Superimposition
07:32

Measuring Maxillary Posterior Tooth Movement: A Model Assessment using Palatal and Dental Superimposition

Published on: February 23, 2024

Insertion angle impact on primary stability of orthodontic mini-implants.

Benedict Wilmes1, Yu-Yu Su, Dieter Drescher

  • 1Department of Orthodontics, University of Duesseldorf, Duesseldorf, Germany. wilmes@med.uni-duesseldorf.de

The Angle Orthodontist
|October 25, 2008
PubMed
Summary

The insertion angle significantly affects mini-implant primary stability. Optimal stability for mini-implants is achieved with insertion angles between 60 and 70 degrees, with oblique angles reducing stability.

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Area of Science:

  • Dental Implantology
  • Biomaterials Engineering

Background:

  • Primary stability is crucial for successful dental mini-implant osseointegration.
  • Insertion angle is a key factor influencing mini-implant primary stability.

Purpose of the Study:

  • To investigate the effect of various insertion angles on the primary stability of mini-implants.
  • To determine the optimal insertion angle for maximizing mini-implant primary stability.

Main Methods:

  • Utilized 28 porcine ilium bone segments embedded in resin.
  • Inserted two sizes of mini-implants (1.6x8 mm and 2.0x10 mm) at angles ranging from 30 to 90 degrees.
  • Measured insertion torque to quantify primary stability.

Main Results:

  • Mini-implant insertion angle significantly impacted primary stability.

Related Experiment Videos

Last Updated: Jun 28, 2026

Measuring Maxillary Posterior Tooth Movement: A Model Assessment using Palatal and Dental Superimposition
07:32

Measuring Maxillary Posterior Tooth Movement: A Model Assessment using Palatal and Dental Superimposition

Published on: February 23, 2024

  • Peak insertion torque values were observed at 60-70 degree insertion angles.
  • Oblique angles (e.g., 30 degrees) resulted in lower primary stability.

    • Conclusions:

    • An insertion angle of 60-70 degrees is recommended for optimal mini-implant primary stability.
    • In constrained spaces, more oblique insertion may be necessary to avoid root contact.