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Does orthodontic loading influence bone mineral density around titanium miniplates? An experimental study in dogs
M A Cornelis1, P Mahy, J P Devogelaer
1Department of Experimental Morphology, Faculty of Medicine, Université catholique de Louvain, Brussels, Belgium. macornel@hotmail.com
Orthodontics & Craniofacial Research
|January 19, 2010
Summary
Orthodontic loading did not significantly affect miniplate stability or bone mineral density (BMD). Miniplate success was higher in the maxilla than the mandible, suggesting receptor site anatomy is key for stability.
Area of Science:
- Orthodontics
- Biomaterials
- Dental Implantology
Background:
- Miniplates are used in orthodontics for anchorage.
- Understanding factors influencing miniplate stability and bone integration is crucial.
Purpose of the Study:
- To investigate the impact of orthodontic loading on miniplate stability.
- To assess the effect of loading on bone mineral density (BMD) around miniplate screws.
Main Methods:
- Miniplates were surgically placed in the jaws of 10 dogs.
- Orthodontic coil springs were used to apply controlled loading to some miniplates.
- Peripheral Quantitative Computed Tomography (pQCT) was employed to measure BMD around screws at 7 and 29 weeks post-surgery.
Main Results:
- No significant difference in success rates between loaded and non-loaded miniplates.
- Maxillary miniplates demonstrated higher success rates than mandibular ones.
- Bone mineral density (BMD) was higher around mandibular screws, irrespective of loading status.
Conclusions:
- Orthodontic loading does not appear to significantly influence miniplate stability or adjacent bone mineral density.
- Receptor site anatomy plays a more critical role in miniplate stability than applied orthodontic forces.
