Related Experiment Video
Updated: Jun 19, 2026
07:32
Measuring Maxillary Posterior Tooth Movement: A Model Assessment using Palatal and Dental Superimposition
Published on: February 23, 2024
Do palatal implants remain positionally stable under orthodontic load? A clinical radiologic study.
Heinrich Wehrbein1, Peter Göllner
1Orthodontic Clinic, University Hospital, Johannes Gutenberg-University, Mainz, Germany. wehrbein@kieferortho.klinik.uni-mainz.de
Summary
Palatally placed length-reduced temporary anchorage devices (LRTADs) demonstrated a 91% success rate for orthodontic anchorage. Minimal positional changes were observed, indicating stability for maxillary treatment.
Area of Science:
- Orthodontics
- Dental Implants
- Maxillofacial Surgery
Background:
- Temporary anchorage devices (TADs) are crucial for orthodontic treatment.
- Length-reduced TADs (LRTADs) offer an alternative for specific applications.
- Palatal placement of LRTADs requires evaluation for stability and efficacy.
Purpose of the Study:
- To assess the positional stability of palatally placed length-reduced temporary anchorage devices (LRTADs).
- To determine the clinical success rate of LRTADs used for multifunctional anchorage.
- To evaluate implant movement using cephalometric analysis.
Main Methods:
- Twenty-two patients received a palatally placed LRTAD (4 or 6 mm length).
- Cephalograms were taken pre- and post-treatment to analyze angulation and position.
- Clinical evaluation assessed implant mobility throughout the study period.
Main Results:
- A 91% success rate was achieved, with 2 of 22 implants showing mobility during healing.
- No significant implant movement was detected radiographically in the remaining 20 LRTADs.
- Observed cephalometric changes were attributed to landmark identification rather than actual implant movement.
Conclusions:
- A single palatally placed LRTAD provides sufficient stationary anchorage for multifunctional tasks in the maxilla.
- The 91% success rate supports the use of LRTADs in clinical orthodontic settings.
- Implant loss, when it occurs, is primarily during the initial healing phase.
