Related Experiment Video
Updated: May 15, 2026
07:17
Studying Orthodontic Tooth Movement in Mice
Published on: August 2, 2024
Bone density and miniscrew stability in orthodontic patients
Vilas Samrit1, Om Prakash Kharbanda, Ritu Duggal
1Division of Orthodontics and Dentofacial Deformities, Centre for Dental Education and Research, All India Institute of Medical Sciences, New Delhi, India.
Australian Orthodontic Journal
|January 12, 2013
Summary
This study found no link between bone density and the success of orthodontic miniscrews used for retracting teeth. Miniscrew stability was not associated with bone density measurements.
Area of Science:
- Orthodontics
- Dental Implantology
- Biomaterials
Background:
- Miniscrews are crucial for orthodontic anchorage, particularly in complex cases requiring en masse anterior retraction.
- Understanding factors influencing miniscrew stability, such as bone density, is vital for predictable treatment outcomes.
Purpose of the Study:
- To assess bone density in the buccal inter-radicular bone between premolars and molars.
- To investigate the association between bone density and the clinical stability of miniscrews used for orthodontic anchorage.
Main Methods:
- Computed tomography (CT) was used to measure bone density in Hounsfield units (HU) at miniscrew placement sites.
- Thirty-eight miniscrews were placed in the maxilla and mandible of ten patients for indirect anchorage.
- Orthodontic force of 2N was applied using nickel-titanium closed-coil springs.
Main Results:
- Cortical bone density varied significantly between the maxilla and mandible, with higher values in the mandible.
- Miniscrew success rates were 100% in the maxilla and 77.8% in the mandible.
- Miniscrew failures were linked to peri-implant inflammation and proximity to dental roots, not bone density.
Conclusions:
- No definitive association was found between bone density and the clinical success or stability of orthodontic miniscrews.
- Factors other than bone density, such as inflammation and implant placement relative to roots, are more critical for miniscrew stability.
