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Surface characteristics and mechanical behavior of retrieved orthodontic microimplants
1Department of Orthodontics, School of Dentistry, Kyungpook National University, Dalgubuldaero 2175, (Samduk 2-Ga), Jung-Gu, Daegu 41940, Korea.
Journal of Zhejiang University. Science. B
|May 8, 2018
Summary
Retrieved orthodontic microimplants show surface wear and altered mechanical properties. Reuse within the same patient immediately after retrieval may be acceptable, but postponed or allogeneic reuse is not recommended.
Area of Science:
- Orthodontics
- Biomaterials Science
- Dental Implantology
Background:
- Microimplants are crucial for orthodontic anchorage.
- Assessing the condition of retrieved microimplants is essential for understanding their long-term performance and potential for reuse.
- Clinical simulation provides a controlled environment to evaluate implant behavior.
Purpose of the Study:
- To evaluate surface characteristics and mechanical behavior of retrieved microimplants.
- To determine the feasibility of reusing microimplants under simulated clinical conditions.
Main Methods:
- Microimplants were retrieved from patients (RMIP) and artificial bone (RMIA).
- Surface morphology, dimensions, and composition were analyzed using microscopy and spectroscopy.
- Mechanical properties, including maximum insertion torque (MIT) and insertion time, were tested.
Main Results:
- Retrieved microimplants showed tip and thread wear, with deposits and foreign elements (Fe, S, Ca) on RMIP surfaces.
- MIT and insertion time increased for retrieved microimplants compared to initial use, especially for RMIP.
- Insertion angle influenced MIT, with 45° showing higher values than 90°, though not statistically significant.
Conclusions:
- Retrieved microimplants undergo surface and mechanical changes, more pronounced in RMIP.
- Immediate reuse in the same patient might be feasible.
- Postponed or allogeneic reuse of microimplants is not advised for clinical practice.
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