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CLINICAL AND RADIOGRAPHIC CHANGES FOLLOWING ORTHODONTIC INTRUSION OF OVERERUPTED MAXILLARY MOLARS WITH TWO
A Slabkovskaya1, A Divnich1, M Abramova1
1A.I. Yevdokimov Moscow State University of Medicine and Dentistry, Moscow, Russia.
Georgian Medical News
|October 10, 2021
Summary
Orthodontic intrusion of upper first molars using two mini-implants successfully created space for prosthetic rehabilitation. This method, utilizing light forces, achieved significant molar intrusion with minimal root resorption, offering a viable solution for dental deformities.
Area of Science:
- Orthodontics
- Dental Implantology
- Prosthodontics
Background:
- Secondary deformities in the lateral region, often associated with missing teeth, require orthodontic preparation for prosthetic rehabilitation.
- Traditional methods for creating space can be lengthy and complex, necessitating innovative approaches.
- Orthodontic intrusion of molars offers a potential solution for managing vertical discrepancies and enabling prosthetic restoration.
Purpose of the Study:
- To evaluate the clinical and radiographic outcomes of orthodontic intrusion of upper first molars using two mini-implants.
- To assess the effectiveness of light intrusion forces in creating space for prosthetic rehabilitation in the lower jaw.
- To compare radiographic changes and root resorption following molar intrusion with mini-implants versus a shape memory arch.
Main Methods:
- Twenty patients with missing lower jaw teeth and secondary vertical deformities underwent orthodontic intrusion of upper first molars.
- Two groups were formed: one utilizing intrusion mechanics with orthodontic implants (mini-implants placed palatally and buccally) and another using a shape memory arch.
- Radiographic changes were assessed using panoramic radiographs and cone-beam computed tomography (CBCT) before and after intrusion, with root resorption evaluated via Multiplanar Reconstruction (MPR).
Main Results:
- Successful intrusion of 28 molars was achieved, normalizing their position.
- The mean intrusion time was 7.86 months, with a mean intrusion length of 2.97 mm and a mean mesial inclination change of 2.02 degrees.
- Root resorption was minimal: 50% of molars showed grade 0, 42.85% grade 1, and 7.15% grade 2, with no resorption in the trifurcation area.
Conclusions:
- Orthodontic intrusion of molars using two mini-implants, placed palatally and buccally with light traction force (30-50 g), is a successful method.
- This technique effectively creates necessary space for prosthetic rehabilitation, addressing secondary deformities and tooth agenesis.
- The use of mini-implants for molar intrusion demonstrates predictable results with a low incidence of root resorption.
