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Long-term durability of orthodontic mini-implants.

Mona Aly Abbassy1,2, Ahmed Samir Bakry3,4, Khalid Hashim Zawawi5

  • 1Department of Orthodontics, Faculty of Dentistry, King Abdulaziz University, PO Box 80209, Jeddah, 21589, Saudi Arabia. mabbassy@kau.edu.sa.

Odontology
|August 26, 2017
PubMed
Summary

Orthodontic mini-implants showed significant surface degradation and decreased titanium content after 6 months of use. Researchers recommend limiting mini-implant service duration to under six months to maintain their integrity.

Keywords:
Mini-implantsOral-care productsOrthodonticsSEM-EDS

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Area of Science:

  • Biomaterials Science
  • Orthodontics
  • Materials Science

Background:

  • Orthodontic mini-implants are crucial for anchorage during complex tooth movements.
  • Understanding the long-term stability and material integrity of these implants in the oral environment is essential for patient outcomes.

Purpose of the Study:

  • To evaluate the surface and chemical composition changes in retrieved orthodontic mini-implants after varying service periods.
  • To determine the optimal service duration for orthodontic mini-implants based on material degradation.

Main Methods:

  • Seventy-two retrieved orthodontic mini-implants (OrthoEasy system) were analyzed after 3-6, 6-12, and 12-24 months of service.
  • A control group of unused mini-implants was included for comparison.
  • Scanning Electron Microscopy with Energy Dispersive X-ray Spectroscopy (SEM-EDS) was used for chemical characterization and topographical analysis.

Main Results:

  • A significant decrease in titanium content and surface property deterioration was observed in mini-implants used for over six months.
  • Degradation affected all examined parts of the mini-implants.
  • Statistical significance was noted at p < 0.05.

Conclusions:

  • The service period for orthodontic mini-implants in the oral cavity should not exceed six months.
  • Prolonged use leads to material compromise, potentially affecting anchorage efficiency and implant longevity.