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Osseointegration of miniscrews: a histomorphometric evaluation
Bart Vande Vannet1, Mehran Moradi Sabzevar, Heinrich Wehrbein
1Department of Orthodontics, Dental School, Vrije Universiteit Brussel, Belgium. bart.vande.vannet@vub.ac.be
European Journal of Orthodontics
|November 3, 2007
Summary
Bracket screw bone anchors (BSBAs) offer effective orthodontic anchorage with partial osseointegration. These miniscrews provide stable intraoral anchorage, allowing for easy insertion and removal in orthodontic applications.
Area of Science:
- Orthodontics
- Biomaterials Science
- Oral and Maxillofacial Surgery
Background:
- Mini-implants and miniscrews are crucial for temporary intraoral anchorage in orthodontics.
- Partial osseointegration offers a balance between secure anchorage and ease of removal.
Purpose of the Study:
- To histomorphometrically evaluate the osseointegration of bracket screw bone anchors (BSBAs).
- To assess the stability and osseointegration of BSBAs under orthodontic loading.
Main Methods:
- Experimental animal study involving beagle dogs.
- Insertion of four BSBAs into the alveolar process of the lower jaw.
- Histological evaluation of osseointegration after 6 months, with analysis of loading time and location effects.
Main Results:
- All eight evaluated screws demonstrated partial osseointegration (mean 74.48%).
- Osseointegration levels were independent of loading time and screw location (P > 0.05).
- BSBAs functioned as rigid osseous anchors against a 200 cN orthodontic load for up to 24 weeks.
Conclusions:
- Small titanium screws (BSBAs) achieve partial osseointegration in orthodontic applications.
- Partial osseointegration facilitates effective anchorage and simple removal of orthodontic miniscrews.
