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Bone quality affects stability of orthodontic miniscrews
Wan-Ping Yu1, Ming-Tzu Tsai2, Jian-Hong Yu3,4
1Master Program for Biomedical Engineering, China Medical University, Taichung, 404, Taiwan.
Scientific Reports
|February 19, 2022
Summary
Orthodontic miniscrew stability is enhanced by greater bone-miniscrew contact percentage (BMC%). Cone-beam computed tomography (CBCT) can predict miniscrew mechanical stability by assessing bone quality and quantity.
Area of Science:
- Orthodontics
- Biomaterials Science
- Dental Implantology
Background:
- Orthodontic miniscrew stability is crucial for successful treatment outcomes.
- Factors influencing miniscrew stability, such as bone quality and quantity, require further investigation.
Purpose of the Study:
- To evaluate the impact of bone-miniscrew contact percentage (BMC%) and bone characteristics on orthodontic miniscrew stability.
- To determine the relationship between insertion torque value (ITV) and miniscrew stability.
Main Methods:
- Miniscrews of various dimensions were inserted into bovine iliac bone specimens.
- Cone-beam computed tomography (CBCT) and microcomputed tomography were used to assess bone quality and quantity.
- Three-dimensional BMC% and ITVs were calculated and recorded.
Main Results:
- Longer and thicker miniscrews demonstrated higher ITVs.
- CBCT accurately measured cortical bone thickness and predicted cancellous bone volume fraction.
- Cortical bone thickness significantly influenced ITV and BMC% more than cancellous bone structure.
- Higher BMC% correlated with greater ITV.
Conclusions:
- Increased BMC% positively correlates with higher insertion torque values, indicating enhanced miniscrew stability.
- CBCT is a valuable tool for predicting the mechanical stability of orthodontic miniscrews by evaluating bone parameters.
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