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Application of orthodontic force in autotransplanted teeth: a longitudinal study
Emma Declerck1, Mostafa EzEldeen2,3, Jan Wyatt3
1Department of Oral Health Sciences-Orthodontics, KU Leuven and Dentistry, University Hospitals Leuven, Kapucijnenvoer 7, Leuven, 3000, Belgium. declerckemma@hotmail.com.
Clinical Oral Investigations
|January 19, 2025
Summary
Starting orthodontic force (OF) after autotransplanted teeth (AP) did not compromise final root length. Early OF is feasible to prevent ankylosis without impacting root development, but delayed OF may increase External Apical Root Resorption (EARR).
Area of Science:
- Dentistry
- Orthodontics
- Endodontics
Background:
- Autotransplanted teeth (AP) require careful management to optimize outcomes.
- The timing of orthodontic force (OF) application is a critical factor influencing root development and potential complications like ankylosis and External Apical Root Resorption (EARR).
Purpose of the Study:
- To investigate the impact of initiating orthodontic treatment at various time points on the root length of autotransplanted premolars (AP).
Main Methods:
- A longitudinal follow-up study of patients under 18 with open-apex autotransplanted premolars.
- Root/crown ratio (RCR) was assessed using periapical radiographs taken at 3-6 month intervals.
- Comparison of RCR between patients with no orthodontic treatment and those starting OF at 3, 6, 9, 12, or 18 months post-transplantation.
Main Results:
- Early OF post-autotransplantation correlated with a stagnation of root development.
- Delayed OF generally led to more root lengthening, but also increased the incidence of EARR once forces were applied.
- The presence or absence of OF was the most significant factor influencing final root length.
Conclusions:
- The timing of OF application did not compromise the final root length of autotransplanted teeth.
- Early OF is a feasible strategy to prevent ankylosis without negatively impacting root length.
- Tailored orthodontic intervention timing is crucial, balancing ankylosis prevention with EARR risk.
