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Root repair after injury from mini-screw.
Karlien Asscherickx1, Bart Vande Vannet, Heiner Wehrbein
1Department of Orthodontics, Dental School Vrije Universiteit Brussel, Jette, Belgium. kasscher@minf.vub.ac.be
Clinical Oral Implants Research
|September 17, 2005
Summary
Orthodontic mini-implants can risk damaging adjacent tooth roots. However, animal studies show that damaged periodontal structures fully repair within 12 weeks after mini-screw removal.
Area of Science:
- Orthodontics
- Periodontology
- Veterinary Medicine
Background:
- Mini-implants and mini-screws are vital for orthodontic anchorage.
- Insertion between tooth roots carries a risk of root damage.
Purpose of the Study:
- To evaluate the healing potential of damaged tooth roots after mini-screw insertion in an animal model.
Main Methods:
- 20 mini-screws (bracket screw bone anchors, BSBAs) were inserted into the mandibles of five beagle dogs.
- Radiographic and histological examinations were used to assess root damage and repair.
- Sequential point labeling and vital stains were employed for tracking.
Main Results:
- Radiographic examination revealed damage to three adjacent tooth roots following mini-screw insertion.
- Histological analysis of these roots showed significant repair of periodontal structures (cementum, periodontal ligament, bone) within 12 weeks post-removal.
Conclusions:
- Despite initial damage from mini-screw placement, the periodontal structures demonstrate a remarkable capacity for repair.
- This suggests that root damage from orthodontic mini-implants may be a transient issue with good healing potential.